Journal articles on the topic 'Implant-supported prosthesi'
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1
Venezia, Pietro, Ferruccio Torsello, Vincenzo Santomauro, Vittorio Dibello, and Raffaele Cavalcanti. "Full Digital Workflow for the Treatment of an Edentulous Patient with Guided Surgery, Immediate Loading and 3D-Printed Hybrid Prosthesis: The BARI Technique 2.0. A Case Report." International Journal of Environmental Research and Public Health 16, no. 24 (December 17, 2019): 5160. http://dx.doi.org/10.3390/ijerph16245160.
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Purpose: To describe a technique intended to transfer of the intermaxillary and occlusal relationships in a fully digital environment from a complete denture to an implant-supported 3D-printed hybrid prosthesis (an acrylic resin complete fixed dental prosthesis supported by implants). Methods: In edentulous cases, the physiological mandibular position should be determined before the immediate loading procedures. In some cases, the use of interim removable prostheses for a few weeks could be useful to test the new occlusion in centric relation and to verify the prosthetic project. When the correct intermaxillary relationships are achieved, it is difficult to transfer them from the provisional to the final prostheses, as impressions or scans of edentulous arches do not have reference points for intermaxillary records. This paper presents a complex case and the technique used to transfer information from a complete denture to an implant-supported prosthesis with a digital workflow. A prosthetic stent has been used to scan the edentulous mandibular arch and to record the intermaxillary relation. Results: The delivery of the hybrid implant-supported prostheses was carried out with no problems and minimal occlusal adjustments. The patient was extremely satisfied with the treatment and the situation remained stable at the 1-year follow up. Conclusions: The approach described in the present article predictably maintains prosthetic information and allows the delivery of a final implant-supported restoration with the same occlusal relationship as the one tested with the provisional diagnostic dentures.
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Mai, Hai Yen, Jae-Min Seo, Jae-Kwang Jung, and Du-Hyeong Lee. "Strategic Use of CAD-CAM Interim Restoration for the Recovery of the Vertical Dimension of Occlusion in the Posterior Partially Edentulous Jaw." Applied Sciences 10, no. 21 (October 31, 2020): 7735. http://dx.doi.org/10.3390/app10217735.
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Occlusal contact loss occasionally occurs following the placement of implant-supported fixed dental prostheses in the posterior region. This complication is caused by the change in the vertical dimension of occlusion after the recovery of mastication. The change is probably related to the prosthesis sinking phenomenon and previous mandibular dislocation. The use of interim prostheses could help re-establish the vertical dimension of occlusion. The definitive prostheses can then be accurately fabricated using digital techniques in the newly established vertical dimension. In this case report, we introduce a protocol incorporating a computer-aided design and computer-aided manufacturing (CAD-CAM) interim prosthesis and digital techniques to minimize the occurrence of unexpected initial occlusal changes in the prosthetic treatment of implant-supported prostheses in the posterior region.
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Montero, Javier. "A Review of the Major Prosthetic Factors Influencing the Prognosis of Implant Prosthodontics." Journal of Clinical Medicine 10, no. 4 (February 17, 2021): 816. http://dx.doi.org/10.3390/jcm10040816.
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Background: The treatment plan of prosthetic restorations supported by dental implants requires comprehensive scientific knowledge to deliver prostheses with good prognosis, even before the implant insertion. This review aims to analyze the main prosthetic determinants of the prognosis of implant-supported prostheses. Methods: A comprehensive review of the literature was conducted with a PICO (Patient Intervention Comparison Outcomes) question: “For partially or complete edentulous subjects treated with implant-supported prostheses, which prosthetic factors could affect clinical outcomes?”. A literature search was performed electronically in PubMed (MEDLINE), Scopus and Cochrane Library with the following equation [PROGNOS * OR RISK] FACTOR IMPLANT DENTAL, and by hand search in relevant journals and throughout the selected papers. Results: This revision was carried out based on 50 papers focused on several prosthodontics-related risk factors that were grouped as follows: implant-connection, loading protocol, transmucosal abutments, prosthetic fit, provisionalization, type of retention, impression technique, fabrication technique, and occlusion. More than a half of the studies were systematic reviews (30%), meta-analysis (16%), or prospective evaluations of prosthesis with various kinds of events (18%). However, narrative reviews of literature (14%) and in vitro/animal studies (16%) were also found. Conclusions: The current literature provides insufficient evidence for most of the investigated topics. However, based on the accumulated data, it seems reasonable to defend that the best treatment approach is the use of morse taper implants with transmucosal abutments, recorded by means of rigidly splinted copings through the pick-up technique, and screwed by milled prosthesis occlusally adjusted to minimize functional overloading.
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Bonnet, Anne Sophie, Marwan Daas, Michel Postaire, and Paul Lipiński. "Numerical Simulations of the Global Behaviour of Implant Supported or Retained Dental Prostheses." Materials Science Forum 638-642 (January 2010): 518–23. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.518.
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In spite of the recent efforts concerning prevention and treatment of dental diseases, total edentulism remains an important world health problem, even in industrialized countries. Different solutions to mandibular total edentulism are available from the classical removable denture to the implant supported prostheses. The aim of the present work is to compare, through finite element simulations, two distinct types of prosthetic solutions. The first one is an implant-supported prosthesis (ISP) using a “All-On-Four” base and the second one is a mandibular implant-retained overdenture (IRO) using two implants. A foodstuff situated on molar is modelled to simulate the mastication force. An orthotropic behaviour is assumed inside the symphyseal area. The results of the simulations show a strong influence of the prosthetic solution type on the stress and strain repartition in the implant and peri-implant bone. This can be explained by the difference of load transfer to bone between those two configurations. Indeed, in the implant-supported prosthesis, the totality of the mastication force is directly transmitted to peri-implant bone whereas the implant-retained solution benefits from a large participation of mucosa to the global load transfer from overdenture to bone.
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ALMEIDA, Híttalo Carlos Rodrigues de, Ellane Talita Silvano de SANTANA, Nikácio Adnner Tavares dos SANTOS, Patrícia Karla Macedo de MORAES, Yasmin Rafaelle Furtado de ARAÚJO, and Marleny Elizabeth Marquez de Martinez GERBI. "Clinical aspects in the treatment planning for rehabilitation with overdenture and protocol-type prosthesis." RGO - Revista Gaúcha de Odontologia 63, no. 3 (September 2015): 271–76. http://dx.doi.org/10.1590/1981-863720150003000032920.
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Objective: The aim of this study was to criticaly review the published literature regarding the clinical aspects involved in the rehabilitation of edentulous patients using Branemark protocol and overdenture prostheses. Methods: An active search was conducted in the LILACS, MEDLINE, PubMed, and SciELO databases using the descriptors: "Coating for dentures" (Overlay Prosthesis and Overdenture) and "Implant-supported fixed dental prosthesis" (Protesis dental de suporte implantado, Dental prosthesis, and Implant Supported Prosthesis) in Portuguese, English, and Spanish between January 2000 and October 2014. Results: The following parameters should be considered when selecting between Branemark protocol and overdenture prostheses: bone support, lip support, lip-line, upper lip length, oral mucosa conditions and size, alveolar ridge contour, crown-bone ratio, interarch space, and speaking space. Overdenture rehabilitation can provide many benefits to patients, such as prosthetic retention, stability, comfort, and improved aesthetics. Conclusions: This study highlights the need for a thorough individualized treatment planning to ensure that fixed prostheses and overdentures have an excellent prognosis when used appropriately in suitable patients at the appropriate time.
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Lumetti, S., G. Ghiacci, G. M. Macaluso, M. Amore, C. Galli, E. Calciolari, and E. Manfredi. "Tardive Dyskinesia, Oral Parafunction, and Implant-Supported Rehabilitation." Case Reports in Dentistry 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7167452.
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Oral movement disorders may lead to prosthesis and implant failure due to excessive loading. We report on an edentulous patient suffering from drug-induced tardive dyskinesia (TD) and oral parafunction (OP) rehabilitated with implant-supported screw-retained prostheses. The frequency and intensity of the movements were high, and no pharmacological intervention was possible. Moreover, the patient refused night-time splint therapy. A series of implant and prosthetic failures were experienced. Implant failures were all in the maxilla and stopped when a rigid titanium structure was placed to connect implants. Ad hoc designed studies are desirable to elucidate the mutual influence between oral movement disorders and implant-supported rehabilitation.
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Gonzalez-Gonzalez, Ignacio, Hector deLlanos-Lanchares, Aritza Brizuela-Velasco, Jose-Antonio Alvarez-Riesgo, Santiago Llorente-Pendas, Mariano Herrero-Climent, and Angel Alvarez-Arenal. "Complications of Fixed Full-Arch Implant-Supported Metal-Ceramic Prostheses." International Journal of Environmental Research and Public Health 17, no. 12 (June 14, 2020): 4250. http://dx.doi.org/10.3390/ijerph17124250.
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We aimed to assess the biological and mechanical-technical complications and survival rate of implants of full-arch metal-ceramic prostheses, during five years of follow-up. 558 implants (of three different brands) retaining 80 full-arch metal-ceramic prostheses were placed in 65 patients, all of whom were examined annually for biological and mechanical-technical complications during the five years of follow-up. Descriptive statistics and univariate logistic regression were calculated. The cumulative survival rate of the implants was 99.8%, and 98.8% prosthesis-based. Mucositis was the most frequent of the biological complications and peri-implantitis was recorded as 13.8% at restoration-level, 16.9% at patient level and 2.0% at implant level. An implant length greater than 10 mm was shown to be a protective factor against biological complications. The mechanical-technical complications were associated with implant diameter, abutment/implant connection and retention system. Loss of screw access filling was the most frequent prosthetic complication, followed by the fracture of the porcelain. Full-arch metal-ceramic prostheses show a high prevalence of implant and prosthesis survival, with few biological and mechanical-technical complications.
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Jain, Himani, Tarun Kalra, Manjit Kumar, Ajay Bansal, and Deepti Jain. "Three-Dimensional Finite Element Analysis to Evaluate Stress Distribution in Tooth and Implant-Supported Fixed Partial Denture–An In Vitro Study." Dental Journal of Advance Studies 8, no. 03 (August 5, 2020): 084–91. http://dx.doi.org/10.1055/s-0040-1714331.
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Abstract Introduction This study was undertaken to assess the influence of different superstructure materials, when subjected to occlusal loading, on the pattern of stress distribution in tooth-supported, implant-supported, and tooth implant-supported fixed partial prostheses, using the finite element analysis with a comparative viewpoint. Materials and Methods The geometric models of implant and mandibular bone were generated. Three models were created in accordance with the need of the study. The first model was given a tooth-supported fixed partial prosthesis. The second model was given tooth implant-supported fixed partial prosthesis, and the third model was given implant-supported fixed partial prosthesis. Forces of 100 N and 50 N were applied axially and buccolingually, respectively. Results The present study compared the stresses arising in the natural tooth, implant, and the whole prostheses under simulated axial and buccolingual loading of three types of fixed partial dentures, namely, tooth-supported, tooth implant-supported, and implant-supported fixed partial dental prostheses using three different types of materials. Conclusion The pattern of stress distribution did not appear to be significantly affected by the type of prosthesis materials in all models. The maximum stress concentrations were found in the alveolar bone around the neck of the teeth and implants.
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Anitua, Eduardo, Juan Saracho, Gabriela Zamora Almeida, Joaquin Duran-Cantolla, and Mohammad Hamdan Alkhraisat. "Frequency of Prosthetic Complications Related to Implant-Borne Prosthesis in a Sleep Disorder Unit." Journal of Oral Implantology 43, no. 1 (February 1, 2017): 19–23. http://dx.doi.org/10.1563/aaid-joi-d-16-00100.
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Sleep bruxism and higher clench index have been associated with obstructive sleep apnea (OSA). However, there is no study that reports on the prosthetic complications in patients with OSA. Records of patients who had performed a sleep study to diagnose OSA were examined for the occurrence of prosthetic complications in implant-borne reconstructions. The primary outcome was the frequency of prosthetic complications. The secondary outcomes were anthropometric data, type of complication, type of prosthesis, type of retention, number of supporting implants, number of prosthetic units, and the presence of obstructive sleep apnea. Of the 172 patients, 67 had an implant-supported prosthesis, and all were included in the study. The mean age was 61 ± 10 years, and 36 were female. Thirty complications in 22 prostheses were identified in 16 patients. The complications were porcelain fracture (14 events), screw/implant fracture (8 events), screw loosening (3 events), and decementation (5 events). The follow-up time was 117 ± 90 months after placement of the prosthesis. The average time for complications to occur was 73 ± 65 months after the placement of the prosthesis. According to the apnea-hypopnea index (AHI), 49 patients had OSA. Thirteen of the 16 patients having a prosthetic complication also had OSA. The highest AHI and thus the severity of OSA was identified in patients with a fracture complication related to an implant, a screw, or a porcelain. The frequency of prosthetic complications has been higher in patients with obstructive sleep apnea.
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Flanagan, Dennis. "Gingival Embrasure Fill In Fixed Implant-Supported Prosthetics: A Review." Journal of Oral Implantology 41, no. 6 (December 1, 2015): e297-e300. http://dx.doi.org/10.1563/aaid-joi-d-14-00185.
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After provisional or definitive cementation of fixed implant-supported prostheses, spontaneous gingival proliferation may occur to fill the cervical embrasure areas of the prosthesis. Adequate oral hygiene, osseous spacing between the supporting implants and attached or immovable soft tissue may be the conditions that allow this phenomenon. This proliferation embrasure fill eliminates interproximal gingival voids, that is, black triangles, and makes the outcome more esthetically acceptable. Since interproximal prosthetic deign and implant positioning may be the primary factors for the fill, the gingival fill may be, in fact, an epulis.
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Egilmez, Ferhan, Gulfem Ergun, Isil Cekic-Nagas, and Suleyman Bozkaya. "Implant-supported hybrid prosthesis: Conventional treatment method for borderline cases." European Journal of Dentistry 09, no. 03 (July 2015): 442–48. http://dx.doi.org/10.4103/1305-7456.163324.
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ABSTRACTAn implant-supported hybrid prosthesis is an acrylic resin complete fixed dental prosthesis and supported by implants might be a solution in extreme cases that the need of the restoration for esthetics, function, lip support, and speech. This clinical report aims to present the esthetic and functional prosthetic rehabilitation of three borderline cases with implant-supported hybrid prostheses. Patient 1 (62-year-old man) and Patient 2 (61-year-old man) presented a chief complaint of a compromised esthetic. After clinical evaluations, in Patient 1, 8 implants in the maxilla and 7 implants in mandibula were observed. Patient 2 had 7 implants in the maxilla and 7 implants in mandibula, which were previously placed. The intra-arch dimension of both patients was excessive and an insufficient peri-oral soft tissue support was observed. Patient 3 was a 61-year-old man had 2 implants with a history of previously implanted graft infection and implant loss on his maxillary posterior jaw. An excessive intra-arch dimension was observed in clinical examination. In addition, massive bone defect and insufficient soft tissue support were examined. In all patients, implant-supported hybrid prostheses were successfully performed. The clinical and radiologic findings were satisfactory. After 3 years of follow-up, no functional, phonetic, or esthetic problems with the restorations were noted. These case reports suggest that implant-supported hybrid prostheses can be a reliable alternative treatment procedure when a porcelain-fused metal fixed restoration does not satisfy a patient's requirements for esthetics, phonetics, oral hygiene, and oral comfort.
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Haroun, Feras, and Oguz Ozan. "Evaluation of Stresses on Implant, Bone, and Restorative Materials Caused by Different Opposing Arch Materials in Hybrid Prosthetic Restorations Using the All-on-4 Technique." Materials 14, no. 15 (August 1, 2021): 4308. http://dx.doi.org/10.3390/ma14154308.
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The long-term success of dental implants is greatly influenced by the use of appropriate materials while applying the “All-on-4” concept in the edentulous jaw. This study aims to evaluate the stress distribution in the “All-on-4” prosthesis across different material combinations using three-dimensional finite element analysis (FEA) and to evaluate which opposing arch material has destructive effects on which prosthetic material while offering certain recommendations to clinicians accordingly. Acrylic and ceramic-based hybrid prosthesis have been modelled on a rehabilitated maxilla using the “All-on-4” protocol. Using different materials and different supports in the opposing arch (natural tooth, and implant/ceramic, and acrylic), a multi-vectorial load has been applied. To measure stresses in bone, maximum and minimum principal stress values were calculated, while Von Mises stress values were obtained for prosthetic materials. Within a single group, the use of an acrylic implant-supported prosthesis as an antagonist to a full arch implant-supported prosthesis yielded lower maximum (Pmax) and minimum (Pmin) principal stresses in cortical bone. Between different groups, maxillary prosthesis with polyetheretherketone as framework material showed the lowest stress values among other maxillary prostheses. The use of rigid materials with higher moduli of elasticity may transfer higher stresses to the peri implant bone. Thus, the use of more flexible materials such as acrylic and polyetheretherketone could result in lower stresses, especially upon atrophic bones.
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Pantaleo, Giuseppe, Alfonso Acerra, Francesco Giordano, Francesco D’Ambrosio, Michele Langone, and Mario Caggiano. "Immediate Loading of Fixed Prostheses in Fully Edentulous Jaws: A 7-Year Follow-Up from a Single-Cohort Retrospective Study." Applied Sciences 12, no. 23 (December 5, 2022): 12427. http://dx.doi.org/10.3390/app122312427.
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The aim of this retrospective single-cohort study was to evaluate the clinical outcome of four-to-five implants immediately restored with metal-resin screw-retained cross-arch fixed prostheses in edentulous jaws 10 years after loading. One-hundred-and-four consecutive patients received four to five implants placed with a torque superior 35 Ncm. One-hundred-and-twenty-seven metal-resin screw-retained fixed prostheses (59 mandibular and 68 maxillary) were to be delivered within 3 days. Outcome measures, evaluated by the treating clinician, were: prosthesis and implant failures, prosthetic modifications, peri-implant mucositis, and biological and prosthetic complications. A total of 549 implants were placed. Twenty-one implants failed in 14 patients and 102 prostheses were remade, at least once, in 81 patients: 2 due to implant failures and 33 because of fractures of the prostheses. In particular, 25 original metal-resin prostheses had to be remade because of fractures versus only eight of the replacement monolithic metal-resin prostheses. All patients were wearing fixed prostheses at the end of the follow-up. Thirty-six biological complications occurred in 22 patients. Eighty-six prosthetic complications occurred in 42 patients. In conclusion, immediately loaded cross-arch prostheses supported by four-to-five immediately placed implants are a viable therapeutic option if robust prostheses are made.
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Ceylan, Gözlem, Nergiz Yılmaz, Özgün Şenyurt, and Göknil Ergün Kunt. "Implant Supported Prosthesıs in a Patıent wıth Progerıa: Case Report." Bosnian Journal of Basic Medical Sciences 9, no. 3 (August 20, 2009): 210–14. http://dx.doi.org/10.17305/bjbms.2009.2808.
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Prosthodontic rehabilitation can be accomplished with fixed, overdenture, complete, or implant-retained prostheses. Dental treatment overcomes the patient’s functional, psychological, esthetic and phonation problems. Remaining healthy teeth may allow the dentist to fabrícate a removable partial overdenture, fixed partial prosthesis or implant - supported prosthesis. The retention of a number of abutments helps maintain a positive ridge form with greater height and volume of the alveolar bone, improving masticatory performance, as well as providing a more stable prostheses. Dental patients who have medical problems need many treatment procedures. Multidisciplinary treatment planning is invaluable for patient’s dental health. Progeria is a rare genetic condition where symptoms resembling aspects of aging are manifested at an early age. characteristic clinical findings of Progeria disease include abnormalities of the skin and hair in conjunction with char-acteristic facial features and skeletal abnormalities. The characteristic facies show protruding ears, beaked nose, thin lips with centrofacial cyanosis, prominent eyes, frontal and parietal bossing with pseudohydrocephaly, midface hypoplasia with micrognathia and large anterior fontanel. The other reported anomalies are dystrophic nails, hypertrophic scars and hypoplastic nipples. The findings that are nearly interested in dentistry are delayed dentition, anodontia, hypodontia, or crowding of teeth. This article presents the multidisciplinary dental treatment planning includes surgical, endodontic and prosthetic treatment of a patient with a history of progeria. In this case complete-arch fixed prostheses in both maxilla and mandible, supported by a combination of im-plants and teeth are reported.
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Manolea, Horia Octavian, Florian Obădan, Sanda Mihaela Popescu, Radu Rîcă, Petre Mărășescu, Alexandru Andrei Iliescu, Constantin Dăguci, and Sebastian Gradinaru. "Current Options of Making Implant Supported Prosthetic Restorations to Mitigate the Impact of Occlusal Forces." Defect and Diffusion Forum 376 (July 2017): 66–77. http://dx.doi.org/10.4028/www.scientific.net/ddf.376.66.
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The lack of a periodontium for a dental implant may lead to high stress concentration at the bone level when the implants are prosthetically loaded. The present paper discusses the current possibilities of implant supported prosthesis making in order to mitigate the impact of occlusal forces. The cement layer may serve as an absorber for the strain, but its role is reduced and poses the risk of excess cement retained in the peri-implant tissue. The use of resin materials for the implant supported prosthetic restorations veneering it has been suggested for many years, but their role it is important in the case of full-arch fixed implant-supported prosthesis with cantilever distal extensions and less in single implant restorations. Nowadays, new materials like fiber-reinforced composites and high-performance polymers as PEEK may be used for the framework of the implant supported prosthetic restorations, but also for the implant or the prosthetic abutment realization.
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Bae, Eun-Bin, Won-Tak Cho, Hyun-Young Bae, So-Hyoun Lee, Tae-Hyung Kim, and Jung-Bo Huh. "Retrospective Clinical Study of a Freely Removable Implant-Supported Fixed Dental Prosthesis by a Microlocking System." BioMed Research International 2020 (November 3, 2020): 1–7. http://dx.doi.org/10.1155/2020/7929585.
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This retrospective clinical study was conducted to evaluate the clinical usefulness of a freely removable microlocking implant prosthesis (MLP) that was developed to overcome the problems with conventional implant prostheses. A total of 54 patients (male: 31, female: 23) and 100 implant prostheses were included. Patients were divided into three groups such as 6-12 months, 12-18 months, and 18-24 months according to the used period after implant prosthesis delivery, and the patients in each group were recalled for examinations of survival rate, marginal bone resorption, peri-implant soft tissue indices, and complications. The prosthetic complications were analysed by combining the recorded chart data during the periodic checks including the last call for this study. During a 2-year observation period, all the implants showed a 100% survival rate without clinical mobility and functional problems. There was no significant difference in marginal bone resorption, plaque index, and bleeding index over the observation period after implant prosthesis delivery. Probing depth of the 18-24 months group ( 1.5 ± 0.19 mm ) was significantly lower than that of the 6-12 months group ( p < 0.05 ). The main complication was abutment loosening (4%), followed by implant prosthesis fracture (2%) and food impaction (2%) which were recorded. Within the limits of the present study, the implant prostheses with MLP are considered to be an applicable and predictable treatment method.
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Szmidt, Monika, Maciej Górski, Maja Bendyk-Szeffer, Anna Stogiera, and Jadwiga Buczkowska-Radlińska. "An Alternative Prosthodontic Management of Maxillary Dentoalveolar Defect in a Patient With Cleft Palate and Lip: Case Report." Cleft Palate-Craniofacial Journal 56, no. 9 (May 12, 2019): 1256–59. http://dx.doi.org/10.1177/1055665619844440.
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Cleft palate/lip is a frequently occurring congenital anomaly; one in every 800 births results in such a problem. Different treatment options are available for replacing missing soft and hard tissues, including removable dental prostheses, fixed dental prostheses (FDPs), and implant prostheses. In the literature, according to different authors, there are different option standard for prosthetic treatment of cleft palate/lip. Some authors report that removable prosthesis is the choice in such cases, some of them regard conventional tooth-supported FDPs as a standard of care. In this case report, the prosthetic treatment of congenital cleft palate/lip was described. Upon the choice of the patient and patient’s agreement, the direct construction Fibre-reinforced composite (FRC) adhesive bridge with pink composite gingival epithesis was performed.
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Soumya, P., K. Aravind, S. C. Ahila, and Murugan Suresh Kumar. "Clinical procedures in stage II implant supported fixed dental prosthesis: A case report." Journal of Academy of Dental Education 7 (December 8, 2021): 49–53. http://dx.doi.org/10.25259/jade_12_2021.
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Restoring a partially edentulous jaw with implant-supported prosthesis is a challenge. The clinical outcome will be satisfactory only when both the surgical phase as well as the prosthetic phase are planned in advance and executed while keeping in mind the aesthetic and functional necessities. In this case report we describe the steps in successfully restoring the edentulous space with implant supported FP1 prosthesis. The sequential steps that were followed in the prosthetic phase has been described in detail. From the satisfactory outcome of the case, it can be concluded that proper evaluation, prosthetically driven treatment planning and correct execution of the plan would ensure good predictability of the implant-supported prosthesis.
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Hakan Tuna, S., Gurel Pekkan, and Bulent Buyukgural. "Rehabilitation of an Edentulous Cleft Lip and Palate Patient with a Soft Palate Defect Using a Bar-Retained, Implant-Supported Speech-Aid Prosthesis: A Clinical Report." Cleft Palate-Craniofacial Journal 46, no. 1 (January 2009): 97–102. http://dx.doi.org/10.1597/07-216.1.
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Prosthetic rehabilitation of an edentulous cleft lip and palate patient with a combined hard and soft palate defect is a great challenge, due to the lack of retention of the obturator prosthesis as a result of its weight and the inability to obtain a border seal. Dental implants improve the retention, stability, and occlusal function of prostheses when used in carefully selected cleft lip and palate cases. This clinical report presents an edentulous unilateral cleft lip and palate patient who has hard and soft palate defects and an atrophied maxilla, treated with an implant-supported speech-aid prosthesis.
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Jacobs, R., R. Brånemark, K. Olmarker, B. Rydevik, D. van Steenberghe, and PI Brånemark. "Evaluation of the psychophysical detection threshold level for vibrotactile and pressure stimulation of prosthetic limbs using bone anchorage or soft tissue support." Prosthetics and Orthotics International 24, no. 2 (August 2000): 133–42. http://dx.doi.org/10.1080/03093640008726536.
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In the present study the psychophysical detection threshold levels for mechanical stimulation of 32 prosthetic limbs were determined. Prosthetic limbs were anchored to the bone by means of an implant (n=17) or supported by a socket enclosing the amputation stump (n=15). Detection threshold levels were assessed for pressure and vibratory stimulation of the prosthesis and the limb at the contralateral side (control). Following vibratory stimulation, thresholds were increased on an avarage 20% for socket prostheses, but approached those of the control for boneanchored prostheses. For pressure stimulation, thresholds were increased up to 60% for socket prostheses and 40% for boneanchored prostheses compared to the control. While boneanchored prostheses yielded significantly lower threshold levels than socket prostheses, there was no significant difference between both treatments regarding pressure stimulation. Results were applicable to both upper and lower limb amputees. It could be concluded that detection thresholds for pressure and especially vibratory stimulation of prosthetic limbs were generally higher than for control limbs. The outcome was related to the prosthetic limb design with boneanchored prostheses yielding better perception than socket prostheses.
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TORCATO, Leonardo Bueno, Paulo Renato Junqueira ZUIM, Daniela Atili BRANDINI, and Rosse Mary FALCÓN-ANTENUCCI. "Relation between bruxism and dental implants." RGO - Revista Gaúcha de Odontologia 62, no. 4 (December 2014): 371–76. http://dx.doi.org/10.1590/1981-8637201400040000032658.
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OBJECTIVE: The aim of this study was to gather information and discuss the predictability of implant-supported prostheses in patients with bruxism by performing a literature review. METHODS: In order to select the studies included in this review, a detailed search was performed in PubMed and Medline databases, using the following key words: bruxism, dental implants, implant supported prosthesis, and dental restoration failure. Items that were included are: case reports, randomized controlled trials, in vitro studies, literature and systematic reviews, with or without meta-analysis, of the last 20 years that addressed the theme. Articles without abstracts, animal studies, articles in languages other than English and articles from journals unrelated to the dental field were excluded. RESULTS: after analysis according to inclusion and exclusion criteria, 28 articles were selected from a total of 54. It is known from the array of scientific articles which have assessed, either through retrospective, prospective or experimental studies, that the biomechanical and biological impact of bruxism on implant-supported prostheses is small, and that the literature has contributed little to exemplify the prosthetic limits of safety for the specialist from a clinical point of view. CONCLUSION: Although there is still no general consensus on this matter, most of the literature review articles do provide clinical guidelines that contribute to implant supported prostheses longevity and stability in patients with bruxism.
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Saeed, Mostafa, Mahmoud Mokhtar El-Far, and Amr Hosny Elkhadem. "Prosthetic Complications of Screw-Retained Restoration Using Multiunit Abutments Versus Intraoral Luting on Titanium Base in Implant-Supported Complete Overdentures Randomized Clinical Trial." Open Access Macedonian Journal of Medical Sciences 10, no. D (January 3, 2022): 14–27. http://dx.doi.org/10.3889/oamjms.2022.7662.
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BACKGROUND: This trial aims to study the difference between prostheses screwmented on full-arch implants using the intraoral luting cement technique on titanium bases versus transmucosal abutments in terms of prosthetic complications. MATERIALS AND METHODS: Twenty patients were recruited in this trial, there were mainly two groups. A screw-retained full-arch implant-supported prosthesis was constructed over four dental implants on upper or lower jaws. For the control group, multiunit abutments were used to construct a screw-retained prosthesis. As for the experimental group, Ti-base abutments were used over the dental implants to construct a screw-retained prosthesis. In both groups, the prosthetic framework was made using polyether ether ketone (PEEK) material and luted intraorally over the titanium sleeve using resin cement. A binary outcome of prosthetic complication was taken in 6 and 12 months. Abutment screw loosening, prosthetic screw loosening, prosthetic screw fracture, abutment screw fracture, veneer fracture, framework fracture, Ti-base decementation, and overall prosthetic loosening were the prosthetic complications included in the trial. RESULTS: At the end of the study, a total of 19 patients adhered to the trial. Throughout the exposure process of implants, two implants failed in one patient from the Ti-base group. This patient was excluded from the study on his request. There was no statistically significant difference present between Ti-base and multiunit abutment groups in terms of abutment and prosthetic screw loosening, abutment and prosthetic screw fracture, veneer and framework fracture, Ti-base decementation, and overall prosthesis loosening for 6 and 12 months. Data were explored for normality using Kolmogorov–Smirnov and Shapiro–Wilk tests, data showed non-parametric (not-normal) distribution. Qualitative data were presented as frequencies and percentages. Wilcoxon and Mann–Whitney tests were used to compare the qualitative outcomes in this study. CONCLUSION: Both multiunit and Ti-base are considered a viable line of treatment to construct a screw-retained full arch implant-supported prosthesis.
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Rozov, R. A., V. N. Trezubov, Yu A. Bystrova, O. B. Spitsyna, and K. Sh Oisieva. "Development, validity and clinical testing of the authors’ technique for the assessment of implant prosthesis quality in older adults and elderly patients." Parodontologiya 26, no. 3 (November 4, 2021): 197–202. http://dx.doi.org/10.33925/1683-3759-2021-26-3-197-202.
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Relevance. The studies which assess the quality of the implant-supported prostheses in elderly patients as well as the impact of the immediate loading on the peri-implant bone are scarce and inconclusive. Various automatic assessment software is known and applied in the clinic. A compact, informative and flexible software is obviously necessary for daily use and continuous control of the quality of the prosthetic treatment. The aim of studies was to improve the automatic quality assessment of implant prostheses in older adults and elderly patients.Materials and methods. 408 responders (151 male and 257 female subjects) aged from 54 to 85 (mean age 73.9 ± 4.9) participated in the clinical testing of the ROZA questionnaire. The conceptual (construct) validity included convergent, divergent and discriminant subtypes. In convergent validity, comparison with a battery of equivalent tests with similar requirements was used: Geriatric Oral Health Assessment Index (GOHAI), Oral Health Impact Profile-14 (OHIP-14) questionnaire, visual analogue scale (VAS) set and two related expert prosthesis quality assessment programs TREVOL and TRESIM. Results. Cronbach’s alpha, that confirms reliability and internal stability of the studied instrument, was 0.82 which is a good level. The correlation of the authors’ technique was low and insignificant (r = 0.242; p = 0.257) compared to the discriminant tests, which demonstrated the target focus of the studied technique.Conclusion. The studied questionnaire ROZA was highly sensitive, reliable for the examination of elderly patients with different implant-supported prostheses. It can be used to assess the quality of the prostheses in elderly, among others to evaluate the quality of the prosthetic treatment.
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Cristea, Ioana, Doriana Agop-Forna, Maria-Alexandra Martu, Cristina Dascălu, Claudiu Topoliceanu, Roland Török, Bianca Török, Dimitrios Bardis, Panagiota Moulavasili Bardi, and Norina Forna. "Oral and Periodontal Risk Factors of Prosthetic Success for 3-Unit Natural Tooth-Supported Bridges versus Implant-Supported Fixed Dental Prostheses." Diagnostics 13, no. 5 (February 23, 2023): 852. http://dx.doi.org/10.3390/diagnostics13050852.
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The goals of this research are: (1) to compare the survival and prosthetic success of metal-ceramic 3-unit tooth- versus implant-supported fixed dental prostheses; (2) to evaluate the influence of several risk factors on the prosthetic success of tooth- and implant-supported fixed dental prostheses (FPDs). A total of 68 patients with posterior short edentulous spaces (mean age 61.00 ± 1.325 years), were divided into two groups: 3-unit tooth-supported FPDs (40 patients; 52 FPD; mean follow-up 10.27 ± 0.496 years) and 3-unit implant-supported FPDs (28 patients; 32 FPD; mean follow-up 8.656 ± 0.718 years). Pearson-chi tests were used to highlight the risk factors for the prosthetic success of tooth- and implant-supported FPDs and multivariate analysis was used to determine significant risk predictors for the prosthetic success of the tooth-supported FPDs. The survival rates of 3-unit tooth- versus implant-supported FPDs were 100% and 87.5%, respectively, while the prosthetic success was 69.25% and 68.75%, respectively. The prosthetic success of tooth-supported FPDs was significantly higher for patients older than 60 years (83.3%) vs. 40–60 years old (57.1%) (p = 0.041). Periodontal disease history decreased the prosthetic success of tooth- versus implant-supported FPDs when compared with the absence of periodontal history (45.5% vs. 86.7%, p = 0.001; 33.3% vs. 90%, p = 0.002). The prosthetic success of 3-unit tooth- vs. implant-supported FPDs was not significantly influenced by gender, location, smoking, or oral hygiene in our study. In conclusion, similar rates of prosthetic success were recorded for both types of FPDs. In our study, prosthetic success of tooth- versus implant-supported FPDs was not significantly influenced by gender, location, smoking, or oral hygiene; however, history of periodontal disease is a significant negative predictor of success in both groups when compared with patients without periodontal history.
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Oliveira, Danila, Járede Carvalho Pereira, Pedro Henrique Silva Gomes-Ferreira, and Aline Beatriz Kottwitz. "Prosthetic resolution of malpositioned dental implants with 5-year follow-up." ARCHIVES OF HEALTH INVESTIGATION 9, no. 5 (April 20, 2020): 457–59. http://dx.doi.org/10.21270/archi.v9i5.4761.
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The poor positioning of dental implants directly influences the functional and esthetic result of the implant-supported prosthesis. And as an alternative to correcting the positioning, prosthetic components such as prefabricated and customized abutments may be used. The current study aims to present an alternative resolution for malpositioned dental implants, with the hopes of minimizing damage to osseointegration and gingival tissues. A 53-year-old female patient had two implants in regions 11 and 21 with a height discrepancy of approximately 7 mm between them. The following treatment plan was proposed: the manufacture of two metal-free crowns and the use of a customized abutment to correct the height of the implant. A metal UCLA (Universal Long Castable Abutment) was used as a healer. The case includes 5 years of follow-up. It can be concluded that the use of a customized abutment as a prosthetic solution for an implant installed far below the cervical region of the tooth presented satisfactory esthetic and functional results with peri-implant bone maintenance and long-term gingival health.Descriptors: Dental Implantation; Dental Prosthesis, Esthetics, Dental.ReferênciasGoodacre CJ, Bernal G, Rungcharassaeng K, Kan JY. Clinical complications with implants and implant prostheses. J Prosthet Dent. 2003;90(2):121-32.Branemark PI, Hansson BO, Adell R, Breine U, Lindström J, Hallén O, et al. Osseointegrated implants in the treatment of the edentulous jaw. Experience from a 10-year period. Scand J Plast Reconstr Surg Suppl. 1977;16:1-132.Simensen AN, Bøe OE, Berg E, Leknes KN. Patient knowledge and expectations prior to receiving implant-supported restorations. Int J Oral Maxillofac Implants. 2015;30(1):41-7.Hyland R, Ellis J, Thomason M, El-Feky A, Moynihan P. A qualitative study on patient perspectives of how conventional and implant-supported dentures affect eating. J Dent. 2009;37(9):718-23.Arunyanak SP, Pollini A, Ntounis A, Morton D. Clinician assessments and patient perspectives of single-tooth implant restorations in the esthetic zone of the maxilla: A systematic review. J Prosthet Dent. 2017;118(1):10-17. Higginbottom FL. Implants as an option in the esthetic zone. J Oral Maxillofac Surg. 2005; 63(9 Suppl 2):33-44.Moráguez OD, Vailati F, Belser UC. Malpositioned implants in the anterior maxilla: a novel restorative approach to reestablish peri-implant tissue health and acceptable esthetics. Part II: Case report and discussion. Int J Esthet Dent. 2015;10(4):522-32.Pelekanos S, Pozi di G, Kourtis S. Restoration of divergent implants with a 2-piece screw-retained fixed, complete dental implant prostheses. J Prosthet Dent. 2016;115(4):389-92.DeFuria C, Weber HP, Kudara Y, Papaspyridakos P. Management of a Malpositioned Implant in the Anterior Maxilla. Compend Contin Educ Dent. 2017;38(3):e9-e12.Scutellà F, Weinstein T, Lazzara R, Testori T. Buccolingual implant position and vertical abutment finish line geometry: two strictly related factors that may influence the implant esthetic outcome. Implant Dent. 2015;24(3):343-8.Funato A, Salama MA, Ishikawa T, Garber DA, Salama H. Timing, positioning, and sequential staging in esthetic implant therapy: a four-dimensional perspective. Int J Periodontics Restorative Dent. 2007;27(4):313-23.Pjetursson BE, Asgeirsson AG, Zwahlen M, Sailer I. Improvements in implant dentistry over the last decade: comparison of survival and complication rates in older and newer publications. Int J Oral Maxillofac Implants. 2014;29 Suppl:308-24.Fuentealba R, Jofré J. Esthetic failure in implant dentistry. Dent Clin North Am. 2015;59(1):227-46.Kim DG, Elias KL, Jeong YH, Kwon HJ, Clements M, Brantley WA, et al. Differences between buccal and lingual bone quality and quantity of peri-implant regions. J Mech Behav Biomed Mater. 2016;60:48-55.Arai K, Takeda Y, Mori Y, Terauchi R, Furumori T, Tanaka S, et al. Analysis of factors associated with maintenance discontinuation in implant patients. Springerplus. 2015;12;4:767.
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Lee, Jung, Wang, and Lee. "Integrated Digital and Conventional Treatment Workflow in Guided Complete Mouth Implant Rehabilitation: A Clinical Case Report." Dentistry Journal 7, no. 4 (October 1, 2019): 100. http://dx.doi.org/10.3390/dj7040100.
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The introduction of digital dentistry and CAD/CAM technology has redefined treatment concepts in implant dentistry—computer guided implant placement has become routine practice, and CAD/CAM prostheses are now commonplace. These advances in treatment options and modalities has led to a paradigm shift in the workflow of surgical and restorative treatments. This case report presents a customized staged treatment protocol that involves the strategic retention of teeth to serve as transitional abutments, which will support a computer guided implant surgical guide as well as a fixed interim prosthesis. The treatment protocol also describes an integrated digital and conventional workflow for full mouth implant-supported fixed prosthetic rehabilitations to provide improved patient care with more predictable outcomes and fewer complications.
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Demirekin, Zeynep Basagaoglu, and Elif Erten. "EVALUATION OF QUALITY OF LIFE-RELATED TO ORAL HEALTH AFTER DIFFERENT PROSTHETIC TREATMENTS IN EDENTULISM PATIENTS." International Journal of Research -GRANTHAALAYAH 10, no. 2 (March 8, 2022): 112–24. http://dx.doi.org/10.29121/granthaalayah.v10.i2.2022.4510.
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Background: The impact of edentulism on oral health status is an important public health issue. Conventional complete dentures, implant-supported removable dentures and implant-supported fixed dentures are evidence-based treatment IRPtions in the treatment of complete edentulism. Quality of life may be compromised due to various reasons such as functional problems, diseases, nutritional deficiency, physiological and psychosocial problems in individuals using prostheses.Objectives: Our aim in this study is to evaluate patient satisfaction of completely edentulous patients treated with conventional complete dentures, implant-supported removable dentures and implant-supported fixed dentures, oral health-related quality of life and to compare the effects on quality of life.Methods: In this study, total of 140 patients involved, 49 female and 91 males, aged between 40 and 90 who were completely edentulous and treated at least 6 months ago in the Prosthetic Dentistry Clinic.Patients were divided into 3 groups as conventional complete denture (CD), implant retained overdenture (IRP) and implant supported fixed prosthesis (ISFP). By Oral Health Impact Profile (OHIP-14), Oral Health-Related Quality of Life-United Kingdom (OHQoL-UK) questionnaires oral health-related quality of life was measured analyzed and obtained parameters were compared.Results: When all findings were evaluated, the oral health-related quality of life of the group treated with implant-supported fixed prosthesis were found to be higher than the conventional complete denture and implant-supported fixed prosthesis group. In addition, it was determined that implant-supported fixed and removable treatments had positive effects on patient satisfaction, quality of life compared to conventional complete denture treatment.Conclusions: Support from dental implants while making a prosthetic treatment plan in edentulous patients will contribute positively to the stability and retention of the prosthesis. This will increase the quality of life of the person by supporting patient satisfaction, adaptation to the prosthesis and nutrition
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Karatas, Meltem Ozdemir, Ebru Demet Cifter, Didem Ozdemir Ozenen, Ali Balik, and Erman Bulent Tuncer. "Manufacturing Implant Supported Auricular Prostheses by Rapid Prototyping Techniques." European Journal of Dentistry 05, no. 04 (October 2011): 472–77. http://dx.doi.org/10.1055/s-0039-1698921.
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ABSTRACTMaxillofacial prostheses are usually fabricated on the models obtained following the impression procedures. Disadvantages of conventional impression techniques used in production of facial prosthesis are deformation of soft tissues caused by impression material and disturbance of the patient due to.Additionally production of prosthesis by conventional methods takes longer time. Recently, rapid prototyping techniques have been developed for extraoral prosthesis in order to reduce these disadvantages of conventional methods. Rapid prototyping technique has the potential to simplify the procedure and decrease the laboratory work required. It eliminates the need for measurement impression procedures and preparation of wax model to be performed by prosthodontists themselves In the near future this technology will become a standard for fabricating maxillofacial prostheses. (Eur J Dent 2011;5:472-477)
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Tribst, João Paulo Mendes, Amanda Maria de Oliveira Dal Piva, Roberto Lo Giudice, Alexandre Luiz Souto Borges, Marco Antonio Bottino, Ettore Epifania, and Pietro Ausiello. "The Influence of Custom-Milled Framework Design for an Implant-Supported Full-Arch Fixed Dental Prosthesis: 3D-FEA Study." International Journal of Environmental Research and Public Health 17, no. 11 (June 5, 2020): 4040. http://dx.doi.org/10.3390/ijerph17114040.
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The current study aimed to evaluate the mechanical behavior of two different maxillary prosthetic rehabilitations according to the framework design using the Finite Element Analysis. An implant-supported full-arch fixed dental prosthesis was developed using a modeling software. Two conditions were modeled: a conventional casted framework and an experimental prosthesis with customized milled framework. The geometries of bone, prostheses, implants and abutments were modeled. The mechanical properties and friction coefficient for each isotropic and homogeneous material were simulated. A load of 100 N load was applied on the external surface of the prosthesis at 30° and the results were analyzed in terms of von Mises stress, microstrains and displacements. In the experimental design, a decrease of prosthesis displacement, bone strain and stresses in the metallic structures was observed, except for the abutment screw that showed a stress increase of 19.01%. The conventional design exhibited the highest stress values located on the prosthesis framework (29.65 MPa) between the anterior implants, in comparison with the experimental design (13.27 MPa in the same region). An alternative design of a stronger framework with lower stress concentration was reported. The current study represents an important step in the design and analysis of implant-supported full-arch fixed dental prosthesis with limited occlusal vertical dimension.
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Toti, Paolo, Simone Marconcini, Giammarinaro Enrica, Giorgio Pedretti, Antonio Barone, and Ugo Covani. "The Influence of Prosthesis Design on the Outcomes of Tooth Implants Immediately Placed and Loaded by Means of One-Piece Titanium Machined Restoration." Journal of Oral Implantology 44, no. 2 (April 1, 2018): 87–93. http://dx.doi.org/10.1563/aaid-joi-d-17-00152.
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Our purpose was to evaluate the occurrence of complications and the degree of bone loss in a cohort of patients treated with fixed prostheses supported by immediately loaded dental implants. The primary aim was to compare partial versus full-arch fixed dental prostheses. We then tested the effect of sinus lifting. In the present retrospective cohort study, the patients had their implants restored with fixed dental prostheses supported by dental implants positioned in the posterior maxilla and mandible. When necessary, the maxillary sinuses were grafted with particulate autogenous bone. Patients were then ranked according to the following predictors: length of prosthesis, crown-to-implant ratio, number of crowns to number of implants ratio, and presence of sinus lifting. Outcomes were evaluated for up to 2 years regarding the peri-implant marginal bone loss and implant/prosthesis survival rates. Fifty-eight subjects (209 implants) were rehabilitated with 25 fixed full-arch prostheses and 33 partial fixed dental implant bridges (16 supported by implants placed in grafted sinus). The mean marginal bone loss for implants supporting partial fixed dental prostheses amounted to 0.81 mm, whereas that for implants within the group of full-arch fixed dental prostheses was 1.21 mm; the comparison of the levels in the 2 groups showed a significant difference (P = .0055). A statistically significant difference (P = .0006) was found between the bone loss around maxillary implants (1.53 mm) and the bone loss around mandibular implants (1.10 mm). Two implants and 4 prostheses failed; 2-year survival rates of partial and of full-arch fixed dental prostheses, respectively, were 94.1% and 96%. Bone loss in full-arch prostheses appeared to be higher than in that of partial prosthesis. Implant-supported prostheses in the maxillae exhibited a bone loss higher than that registered in mandibles.
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Rozov, R. A., V. N. Trezubov, and Glen Liddelow. "Clinical and radiographic classification of implant supported prosthesis for edentulous patients." Periodontology 24, no. 2 (April 29, 2019): 157–60. http://dx.doi.org/10.33925/1683-3759-2019-24-2-157-160.
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Relevance. In domestic and foreign professional literature there is a lack of aggregated consolidated data about immediate long span implant supported prosthesis which could be fundamental in making decision making process during the treatment planning stage, as well as at the estimation of quality of implant supported prosthetics. The aim of this study – the creation of a conceptual model of the standard implant prosthetics for edentulous patients.Materials and methods. A comprehensive examination and implantation prosthetics 382 patients aged 38 to 84 years (211 women, 171 men) with 582 implant supported prosthesis of various types, supporting on implants "Nobel Replace Select / Groove», «Nobel Parallel CC», «Nobel Speedy Groove», «Nobel Trefoil CC» (3775 implants). We have created a new clinical and radiographic classifcation of implant-supported prosthesis for edentulous patients.Result. As a result of the classifcation in the I (1-2 implants) class rallied 6.2% of implant supported prosthesis, to II class (3-4 implant, «TREFOIL» included) was assigned 19.2% of prostheses, to III class (5-6 implants) – 30.2% of replacement structures IV- to (7-10 implants) – 44%, and V – 0,3%. Meanwhile II, III, IV classes and I statistically revealed age differences.Conclusions: We have sorted out fve main classes, 8 subclasses and 18 groups with 34 subgroups of implant supported prosthesis based on the number of abutments, type of prosthesis, retention method and the presence of unilateral or bilateral cantilever.
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Fernandes, André Massoni, Pedro Aryel Carvalho Dias, Isis Almela End Hoshino, and Rodolfo Bruniera Anchieta. "Total rehabilitation with implant-supported and implant-retained prostheses in atrophic maxillae: Aesthetic and functional resolution for totally edentulous patients." Research, Society and Development 11, no. 16 (December 1, 2022): e110111637232. http://dx.doi.org/10.33448/rsd-v11i16.37232.
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Introduction: Implant-supported prostheses are an excellent treatment option for totally edentulous patients, however, some conditions, such as extremely atrophic jaws, may limit their application. Aims: to demonstrate and discuss, through a series of clinical cases, the functional aesthetic resolution of totally edentulous patients with atrophic maxillae, using three different implant-prosthesis approach. Methods and Material: This article describes a clinical case series of patients has between 65 and 75 years old, who lost all upper teeth and had severely atrophic jaws. Due to the bone situation of the maxilla, an osteotome was planned for sinus floor elevation and followed by an allogeneic bone graft. After 18 months of bone integration, osseointegrated implants were installed and different prostheses were made for each case. Conclusions: It is possible to conclude that with the use of advanced surgical and prosthetic planning it is possible to recover the aesthetics and function of a serious and complex clinical case.
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de Araújo Nobre, Miguel, Carlos Moura Guedes, Ricardo Almeida, António Silva, and Nuno Sereno. "Hybrid Polyetheretherketone (PEEK)–Acrylic Resin Prostheses and the All-on-4 Concept: A Full-Arch Implant-Supported Fixed Solution with 3 Years of Follow-Up." Journal of Clinical Medicine 9, no. 7 (July 10, 2020): 2187. http://dx.doi.org/10.3390/jcm9072187.
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Background: The aim of this three-year prospective study was to examine the outcome of a solution for full-arch rehabilitation through a fixed implant-supported hybrid prosthesis (polyetheretherketone (PEEK)-acrylic resin) used in conjunction with the All-on-4 concept. Methods: Thirty-seven patients (29 females, 8 males), with an age range of 38 to 78 years (average: 59.8 years) were rehabilitated with 49 full-arch implant-supported prostheses (12 maxillary rehabilitations, 13 mandibular rehabilitations and 12 bimaxillary rehabilitations). The primary outcome measure was prosthetic survival. Secondary outcome measures were marginal bone loss, plaque and bleeding scores, veneer adhesion issues, biological complications, mechanical complications, and the patients’ subjective evaluation. Results: There were two patients (maxillary rehabilitations) lost to follow-up, while one patient withdrew (maxillary rehabilitation). One patient with bimaxillary rehabilitation fractured the mandibular PEEK framework, rendering a 98% prosthetic survival rate. Implant survival was 100%. Average (standard deviation) marginal bone loss at 3-years was 0.40 mm (0.73 mm). Veneer adhesion was the only technical complication (n = 8 patients), resolved for all patients. Nine patients (n = 11 prostheses) experienced mechanical complications (all resolved): fracture of acrylic resin crowns (n = 3 patients), prosthetic and abutment screw loosening (n = 4 patients and 3 patients, respectively), abutment wearing (n = 1 patient). One patient experienced a biological complication (peri-implant pathology), resolved through non-surgical therapy. A 90% satisfaction rate was registered for the patients’ subjective evaluation. Conclusions: Based on the results, the three-year outcome suggests the proposed rehabilitation solution as a legitimate treatment option, providing a potential shock-absorbing alternative that could benefit the implant biological outcome.
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Reda, Rodolfo, Alessio Zanza, Dario Di Nardo, Valentina Bellanova, Edit Xhajanka, and Luca Testarelli. "Implant Survival Rate and Prosthetic Complications of OT Equator Retained Maxillary Overdenture: A Cohort Study." Prosthesis 4, no. 4 (December 16, 2022): 730–38. http://dx.doi.org/10.3390/prosthesis4040057.
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(1) Background: The overdenture is a complete denture, an implant-supported prosthesis, that the patient can remove at home for the usual oral hygiene procedures, thanks to a simple and intuitive anchoring system. Clinically, the execution of this rehabilitation for the lower arch is often favored, but when it is necessary to limit the extension of the palate in the upper arch, it can represent the least invasive and economic solution. The aim of the study is to analyze post-loading implant loss for implant-supported prostheses in the edentulous upper jaw. (2) Methods: This retrospective study was carried out on patients who received a superior overdenture on four implants for rehabilitation. A total of 42 patients were included in this study and initially evaluated clinically and radiographically. The follow-up period for patients after delivery of the upper overdenture is between 48 and 72 months. A total of 168 implants were inserted and monitored in this period. Clinical and radiographic tests were carried out on all 168 implants, with constant re-evaluation. (3) Results: The overall implant survival rate is 92.9%, a value that corresponds to those present in the literature in previously published studies. There were few prosthetic complications, mainly the detachment of anterior prosthetic teeth. (4) Conclusions: Most of these complete prostheses, which as antagonist had another previously made overdenture on four or on two implants, achieved excellent success rates in this study at 72 months.
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Júnior, Jenival C. de Almeida, Emilli L. Neves, and Gustavo M. de Almeida. "Immediate Load in Units using the Indexed Prosthesis in the Sensitive System." International Journal of Advanced Engineering Research and Science 9, no. 12 (2022): 580–85. http://dx.doi.org/10.22161/ijaers.912.64.
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This clinical case report emphasizes the significant variations in implant placement systems, which denotes an emerging need for systems that minimize deviations in order to ensure implant placement at the intended bone level. The present work suggests a protocol for a simplified indexing technique using the Index Sensitive® technology (Conexão Sistema de Prothesis, São Paulo, Brazil), with the immediate placement of an implant-supported prosthesis with an indexed abutment in the implant, minimizing errors and distortions in the final result. of surgery arising from the process of making the surgical guide and the surgical procedure. The objective of this case report was to prove the efficiency of the Sleeve Index Sensitive® system in the manufacture of implant-supported prostheses in exoplan and dentalcad software prior to implant installation and to assess whether the transfer of the planning in the software to the patient's mouth is accurate. Alternative hypothesis that the Sleeve Index Sensitive® system is efficient in reproducing the indexed schedule and preserves the natural emergence profile. Patients were included with root fractures, and after previous analysis, it was proposed and the installation of dental implants of immediate loading in single units using the prosthesis indexed in the Sensitive® System. The data needed for indexing was imported into the Exoplan software, Exocad. Surgical planning was performed with the prosthetic component, Ti-Base S NP, virtually indexing the prosthesis, determining the positioning of the tooth to the implant, generating the surgical guide. The surgical guide has been incorporated into Sensitive® ferrules with a lock in a single position. Then it was exported in an STL file to be printed. The surgical plan was exported to manufacture the prosthesis. With the printed guide, milling was performed to install the Flash Vulcano implant with a diameter of 3.5 mm and height variation according to each case, distinctly.
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Rahajoeningsih, Poedji, and Rosida Manurung. "Jenis-jenis gigitiruan dukungan implan Implant-supported dentures." Journal of Dentomaxillofacial Science 12, no. 1 (February 28, 2013): 44. http://dx.doi.org/10.15562/jdmfs.v12i1.348.
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Dental implants, or completely said as dental implant bodies, function as analogues of tooth roots, achieving aunion directly with jawbone following their insertion into a prepared socket in the bone. Implant system have threebasic components, namely the dental implant body that is lying in the jawbone, abutment that lies on the jawboneand the prosthesis. Dental implants may stabilize a removable prosthesis, complete or partial overdentures, and orsupport and stabilize a fixed prosthesis. In designing implant-supported removable prostheses, there are three formsof anchorage frequently used, namely bar/sleeve (clip) joints which links two or more implants, ball/cap anchoragesapplied individually to two or more isolated implants, and magnets/magnetic keepers. Implant-supported fixedprosthesis is either screwed to or cemented on to the abutment.
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Ionescu, Roxana Nicoleta, Alexandra Ripszky Totan, Marina Meleșcanu Imre, Ana Maria Cristina Țâncu, Mihaela Pantea, Mihai Butucescu, and Alexandru Titus Farcașiu. "Prosthetic Materials Used for Implant-Supported Restorations and Their Biochemical Oral Interactions: A Narrative Review." Materials 15, no. 3 (January 28, 2022): 1016. http://dx.doi.org/10.3390/ma15031016.
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The purpose of this study is to outline relevant elements regarding the biochemical interactions between prosthetic materials used for obtaining implant-supported restorations and the oral environment. Implant-supported prostheses have seen unprecedented development in recent years, benefiting from the emergence of both new prosthetic materials (with increased biocompatibility and very good mechanical behavior), and computerized manufacturing technologies, which offer predictability, accuracy, and reproducibility. On the other hand, the quality of conventional materials for obtaining implant-supported prostheses is acknowledged, as they have already proven their clinical performance. The properties of PMMA (poly (methyl methacrylate))—which is a representative interim material frequently used in prosthodontics—and of PEEK (polyether ether ketone)—a biomaterial which is placed on the border between interim and final prosthetic use—are highlighted in order to illustrate the complex way these materials interact with the oral environment. In regard to definitive prosthetic materials used for obtaining implant-supported prostheses, emphasis is placed on zirconia-based ceramics. Zirconia exhibits several distinctive advantages (excellent aesthetics, good mechanical behavior, biocompatibility), through which its clinical applicability has become increasingly wide. Zirconia’s interaction with the oral environment (fibroblasts, osteoblasts, dental pulp cells, macrophages) is presented in a relevant synthesis, thus revealing its good biocompatibility.
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WANG, D., A. QU, H. ZHOU, and M. WANG. "BIOMECHANICAL ANALYSIS OF THE APPLICATION OF ZYGOMA IMPLANTS FOR PROSTHESIS IN UNILATERAL MAXILLARY DEFECT." Journal of Mechanics in Medicine and Biology 16, no. 08 (November 25, 2016): 1640030. http://dx.doi.org/10.1142/s0219519416400303.
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The objective of this research is to evaluate the biomechanical effect of zygomatic implant-supported obturator prostheses in unilateral maxillary defect. Based on CT data, four 3D numerical models were built. One model was a normal craniofacial complex (model 1) and other three models were structures with unilateral maxilla defect reconstructed using clasp-retained obturator prosthesis (model 2), one zygomatic implant-supported and clasp-retained prosthesis (model 3), two zygomatic implant-supported and clasp-retained prosthesis (model 4). Bilateral vertical loads of 300[Formula: see text]N were imposed and the stress and displacement distribution were calculated, analyzed and compared. The bilateral occlusal forces dispersed along the three-mechanical-pillar of the maxillofacial region and the displacement distributed symmetrically in model 1. Because of mechanical pillars break on the affected side, all occlusal forces were transferred by clasps and abutment teeth in model 2, which induced the increase in stress and displacement level. The zygomatic implant restored mechanical pillars and greatly reduced the stress and displacements levels in models 3 and 4. The stress and displacement distributions on clasps, bones, teeth and periodontal ligaments were more reasonable with the support of zygomatic implants. Therefore, the zygomatic implant-supported and clasp-retained prostheses were found to be more effective for unilateral maxillary defect reestablishment.
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Zavanelli, Adriana Cristina, José Vitor Quinelli Mazaro, Recardo Alexandre Zavanelli, Adérico Santana Guilherme, Jaqueline Barbosa Magalhães, and Leandro de Carvalho Cardoso. "Distal Extension Removable Partial Denture with Resilient Attachment Connected to an Anterior Fixed Implant-Supported Prosthesis: A Clinical Report." World Journal of Dentistry 3, no. 1 (2012): 87–90. http://dx.doi.org/10.5005/jp-journals-10015-1133.
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ABSTRACT Background Considering the limited qualitative and quantitative bone in the posterior arch, this modality of prosthetic treatment could provide a positive emotional factor reestablished by immovability of the anterior fixed implant-supported segment. Objective This clinical report demonstrates the possibility of achieving positive results with a removable partial denture connected to an implant-supported fixed prosthesis associated to an extra resilient attachment. Clinical significance In cases of posterior mandibular and maxilla atrophy added to the patients desire against the bone graft, this kind of prosthetic treatment has an important place as an alternative. How to cite this article Zavanelli RA, Mazaro JVQ, Guilherme AS, Magalhães JB, de Carvalho Cardoso L, Zavanelli AC. Distal Extension Removable Partial Denture with Resilient Attachment Connected to an Anterior Fixed Implant-Supported Prosthesis: A Clinical Report. World J Dent 2012;3(1):87-90.
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Martínez, Adel Martínez, María del Pilar Lujan-Pardo, and Stephanye Ariza-Martínez. "Metal–Ceramic implant-supported fixed dental prostheses: the gold standard for the completely edentulous patient. A case report." Dental Update 49, no. 7 (July 2, 2022): 596–99. http://dx.doi.org/10.12968/denu.2022.49.7.596.
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The development of implantology has allowed implant-supported fixed prosthetic treatments in edentulous patients to become the main alternative to conventional rehabilitation. The dental experience of edentate patients comprises an extensive history of successes and failures with traditional rehabilitation. The following report describes a case of a completely edentulous patient who recovered oral function and aesthetics by placing six implants in each jaw and, subsequently, restoration with metal–ceramic implant-supported fixed dental prostheses (FDPs). The authors explore the criteria that must be considered for the selection of the material to be used in implant-supported fixed prostheses. CPD/Clinical Relevance: To ensure enhanced survival rates for implant-supported fixed prosthetic restorations in edentulous patients, patient factors, their expectations, the number of implants to be placed and the materials to be used must be carefully considered.
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Rozov, Roman, and Vladimir Trezubov. "DEVELOPMENT AND PRESCRIPTION OF THE FUNCTIONAL FOOD DIET TO THE PATIENTS WITH DENTAL PROSTHESIS." Actual problems in dentistry 17, no. 3 (November 12, 2021): 119–25. http://dx.doi.org/10.18481/2077-7566-21-17-3-119-125.
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Till present times nutritiology and dietology in dental practice are at rudimentary level. At the same time it is a well-known fact the chewing efficiency is much higher in case of having fixed prosthesis comparing with their removable denture counterpart. As for elderly population nourishment it is important to take into consideration the complexity of receiving of all the necessary nutrients. Quantity and quality of the food diet will directly affect their quality of life.
Aim. Development of the functional food diet ration for specific groups of dental patients
Materials and Methods. We surveyed 244 patients (84 males, 160 females) in the age range from 60 to 85 years (mean value 75.4+/-2.4) with different types of implant supported prostheses. We used clinical, sociological, nutritiological evaluation methods. Besides that we used GOHAI questionnaire and modified Wolfart questionnaire.
Results. We defined basic groups of dental patients who have indications for prescribing functional food diet:
a) patients utilizing removable dentures, especially full dentures, in the situation where antagonists would be intact dentition or dental arches with conventional or implant supported fixed bridges;
b) patients treated with immediate removable dentures, fixed implant supported prostheses, especially in case of big span bridges with limited amount of fixtures;
c) patients using removable implant supported overdentures;
d) Patients older than 70 years of age.
We established food rations based on intaking soft low viscosity liquid meal. High GOHAI scores (56.1+/-1.49) were the prove of the high efficiency and efficacy of the rehabilitation per se and also of the functional diet regimen recommended to the examined patients.
Conclusions. We developed functional food diet taking into consideration the short and long term period after finishing the implant supported or conventional, immediate or delayed prosthetic rehabilitation with the use of total prosthesis predominately for edentulous patients. Incorporation of these types of diet regimen in the rehabilitation plan oriented towards increasing the efficiency of the main treatment arrangements.
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Cardoso, Rafael Rezende, João Victor Ferreira Costa, Roberto Sales e. Pessoa, Sergio Luis Scombatti de Souza, Ariel Lenharo, Fabio Jose Barbosa Bezerra, and Guilherme Jose Pimentel Lopes de Oliveira. "The adjuvant effect of a mouthwash containing green tea and hyaluronic acid on the peri-implant parameters: a pilot short-term clinical evaluation." Journal of Multidisciplinary Dentistry 10, no. 3 (September 2, 2022): 10–5. http://dx.doi.org/10.46875/jmd.v10i3.518.
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The aim of this pilot study was to evaluate the adjuvant effect of a mouthwash containing green tea and hyaluronic acid on the peri-implant clinical parameters in full arch implant-supported fixed prosthesis users. Eleven patients with a total of 75 implants that supported 6 lower total fixed prostheses and 7 upper total fixed prostheses agreed to participate in this short-term pilot study. Patients were submitted to clinical analysis of the implants at baseline and 10 days after initial product use. The probing depth, level of the peri-implant mucosa, clinical attachment level, peri-implant mucosa inflammation index and visible plaque index in each of the 6 sites were evaluated. To perform these analyses all, the prostheses were unscrewed during both intervention points. In general, the newly-developed mouthwash was shown to be safe to use with no signs of negative side effects. Additionally, biofilm and inflammation index were both reduced, with changes in the peri-implant mucosa marginal level due to inflammation reduction. It can be concluded that the mouthwash containing green tea and hyaluronic acid successfully reduced biofilm accumulation and inflammation around dental implants in full arch implant-supported fixed prosthesis safely in a short-term evaluation period.
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Lorenzi, Claudia, Fabrizio Lio, Piero Papi, Vincenzo Mazzetti, Andrea Laureti, and Claudio Arcuri. "Clinical Reliability of Complete-Arch Fixed Prostheses Supported by Narrow-Diameter Implants to Support Complete-Arch Restorations." Applied Sciences 13, no. 1 (December 30, 2022): 538. http://dx.doi.org/10.3390/app13010538.
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The aim of this study was to evaluate the clinical application of fixed screw-retained complete-arch rehabilitations supported by four narrow-diameter implants (NDIs). The records of patients treated with complete-arch prostheses screwed onto four NDIs treated with an immediate loading protocol between 2010 and 2020 with at least 1 year of follow-up after the positioning of the definitive restoration were reviewed. The implants were placed according to the final prosthetic design and were immediately loaded. The interim prostheses were replaced after the healing period by definitive acrylic resin titanium-supported prostheses. Patients were followed to evaluate treatment success, the implant survival rate (ISR), and the prosthetic survival rate (PSR). A total of 121 NDIs were positioned in 30 patients to restore 30 complete arches (18 maxilla and 12 mandible). One implant did not achieve osseointegration, resulting in an overall ISR of 99.2%. No prosthetic or implant failures occurred during the 1 to 11 years of follow-up. Three biological and four prosthetic complications occurred, resulting in a treatment rehabilitation survival of 94.1% and a PSR of 86.7%. Despite the limitations of the present retrospective study, such as the use of one single type of dental implant and patients treated in a single rehabilitation center, complete-arch rehabilitation with fixed prostheses supported by four NDIs seems to be a reliable treatment in the medium to long term.
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Zavanelli, Adriana Cristina, José Vitor Quinelli Mazaro, Caroline Cantieri de Mello, Joel Ferreira Santiago, and Andressa Paschoal Amoroso. "An Esthetics Rehabilitation with Computer-aided Design/ Computer-aided Manufacturing Technology." Journal of Contemporary Dental Practice 15, no. 4 (2014): 506–12. http://dx.doi.org/10.5005/jp-journals-10024-1570.
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ABSTRACT Aim This paper describes a case of a rehabilitation involving Computer Aided Design/Computer Aided Manufacturing (CADCAM) system in implant supported and dental supported prostheses using zirconia as framework. Background The CAD-CAM technology has developed considerably over last few years, becoming a reality in dental practice. Among the widely used systems are the systems based on zirconia which demonstrate important physical and mechanical properties of high strength, adequate fracture toughness, biocompatibility and esthetics, and are indicated for unitary prosthetic restorations and posterior and anterior framework. Case description All the modeling was performed by using CAD-CAM system and prostheses were cemented using resin cement best suited for each situation. Conclusion The rehabilitation of the maxillary arch using zirconia framework demonstrated satisfactory esthetic and functional results after a 12-month control and revealed no biological and technical complications. Clinical significance This article shows the important of use technology CAD/CAM in the manufacture of dental prosthesis and implant-supported. How to cite this article Mazaro JVQ, Mello CC, Zavanelli AC, Santiago JF Jr, Amoroso AP, Pellizzer EP. An Esthetics Rehabilitation with Computer-aided Design/Computer-aided Manufacturing Technology. J Contemp Dent Pract 2014;15(4): 506-512.
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Gumieiro, Emne Hammoud, Luciano Lauria Dib, Ricardo Schmitutz Jahn, João Ferreira dos Santos Junior, Ulf Nannmark, Gösta Granström, and Márcio Abrahão. "Bone-anchored titanium implants for auricular rehabilitation: case report and review of literature." Sao Paulo Medical Journal 127, no. 3 (2009): 160–65. http://dx.doi.org/10.1590/s1516-31802009000300009.
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CONTEXT AND OBJECTIVE: Osseointegrated implants have acquired an important role in the prosthetic rehabilitation of patients with craniofacial defects. The main indications are lack of local tissue for autogenous reconstruction, previous reconstruction failure and selection of this technique by the patient. This paper presents a clinical case and discusses indications and advantages of the osseointegrated implant technique for retention of auricular prostheses. TYPE OF STUDY: Case report, Universidade Federal de São Paulo (UNIFESP). METHODS: A female patient received three auricular implants after surgical resection of a hemangioma in her left ear. The time taken for osseointegration of the temporal bone was three months. After fabrication of the implant-retained auricular prosthesis, the patient was monitored for 12 months. RESULTS: The clinical parameters evaluated showed good postoperative healing, healthy peri-implant tissue, good hygiene and no loss of implants. Good hygiene combined with thin and immobile peri-implant soft tissues resulted in minimal complications. Craniofacial implant integration appears to be site-dependent; increasing age affects osseointegration in the temporal bone. The frequency of adverse skin reactions in peri-implant tissues is generally low. CONCLUSION: The surgical technique for rehabilitation using implant-retained auricular prostheses seems to be simple. It is associated with low rates of adverse skin reactions and long-term complications. Prostheses anchored by osseointegrated implants seem to provide better retention than do prostheses supported on spectacle frames, less risk of discoloration through the use of adhesives and better esthetic results than do prostheses anchored in the surgical cavity
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Moraes, Nathalia, Eduardo Moraes, Tiago Anastacio, Licínio Silva, Aldir Machado, José Schoichet, Raphael Monte Alto, et al. "Active Tactile Sensibility of Brånemark Protocol Prostheses: A Case–Control Clinical Study." Materials 14, no. 16 (August 18, 2021): 4644. http://dx.doi.org/10.3390/ma14164644.
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Few studies have assessed active tactile sensibility in patients rehabilitated with implants. Improved knowledge about functional tactile sensibility will contribute to several clinical applications, such as protocols for immediate loading, prosthesis design, occlusal improvement in implantology, and physiological integration of implant-supported prostheses. The present study evaluated active tactile sensibility in patients rehabilitated with Brånemark-type mandibular prostheses that impede the total mucosa-supported maxillary prosthesis. Thirty-five subjects participated in this study. The experimental group (n = 18) inclusion criteria were as follows: Brånemark-type prosthesis and a total mucosa-supported maxillary prosthesis. The control group (n = 17) was composed of participants with complete healthy dentition. Carbon foils with different thicknesses (12 μm, 24 μm, 40 μm, 80 μm, and 200 μm) were placed in the premolar region to evaluate the brink of active oral tactile sensibility. The researchers assessed the participants 120 times. After evaluation, we observed a statistical difference (p < 0.05) between the groups. Additionally, the degree of sensibility was found for all thicknesses, except for 12 μm, on both sides. There was a more significant increase in perception in the control group as the carbon thickness increased. The tactile sensibility threshold was 2.5 times greater for participants with prostheses. Thus, the tactile sensibility for mandibular implant-supported and maxillary mucosa-supported prostheses is significantly lower than that of dentate patients, which was detected above the thickness of 80 μm; in patients with natural dentition, different thicknesses were seen starting from 24 μm.
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Cantó-Navés, Oriol, Raul Medina-Galvez, Xavier Marimon, Miquel Ferrer, Óscar Figueras-Álvarez, and Josep Cabratosa-Termes. "A 3D Finite Element Analysis Model of Single Implant-Supported Prosthesis under Dynamic Impact Loading for Evaluation of Stress in the Crown, Abutment and Cortical Bone Using Different Rehabilitation Materials." Materials 14, no. 13 (June 24, 2021): 3519. http://dx.doi.org/10.3390/ma14133519.
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In the literature, many researchers investigated static loading effects on an implant. However, dynamic loading under impact loading has not been investigated formally using numerical methods. This study aims to evaluate, with 3D finite element analysis (3D FEA), the stress transferred (maximum peak and variation in time) from a dynamic impact force applied to a single implant-supported prosthesis made from different materials. A 3D implant-supported prosthesis model was created on a digital model of a mandible section using CAD and reverse engineering. By setting different mechanical properties, six implant-supported prostheses made from different materials were simulated: metal (MET), metal-ceramic (MCER), metal-composite (MCOM), carbon fiber-composite (FCOM), PEEK-composite (PKCOM), and carbon fiber-ceramic (FCCER). Three-dimensional FEA was conducted to simulate the collision of 8.62 g implant-supported prosthesis models with a rigid plate at a speed of 1 m/s after a displacement of 0.01 mm. The stress peak transferred to the crown, titanium abutment, and cortical bone, and the stress variation in time, were assessed.
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Park, Gang-Seok, Seong-Kyun Kim, Seong-Joo Heo, Jai-Young Koak, and Deog-Gyu Seo. "Effects of Printing Parameters on the Fit of Implant-Supported 3D Printing Resin Prosthetics." Materials 12, no. 16 (August 9, 2019): 2533. http://dx.doi.org/10.3390/ma12162533.
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The purpose of the study was to investigate the influence of 3D printing parameters on fit and internal gap of 3D printed resin dental prosthesis. The dental model was simulated and fabricated for three-unit prostheses with two implants. One hundred prostheses were 3D printed with two-layer thicknesses for five build orientations using a resin (NextDent C&B; 3D systems, Soesterberg, The Netherlands) and ten prostheses were manufactured with a milling resin as control. The prostheses were seated and scanned with micro-CT (computerized tomography). Internal gap volume (IGV) was calculated from 3D reconstructed micro-CT data. IGV, marginal fit, and lengths of internal gaps were measured, and the values were analyzed statistically. For the 3D printed prostheses, IGV was smaller at 45°, 60°, and 90° compared to other build orientations. The marginal fit evaluated by absolute marginal discrepancy was smaller than other build orientations at 45° and 60°. IGV was smaller at 50 µm layer thickness than at 100 µm layer thickness, but the marginal fit was smaller at 100 µm layer thickness than at 50 µm layer thickness. The 3D printed prosthesis had smaller internal gap than the milled prosthesis. The marginal fit of the 3D printed resin prosthesis was clinically acceptable, and build orientation of 45° and 60° would be recommended when considering fit and internal gap.
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Rozov, R. A., V. N. Trezubov, E. S. Loboda, S. D. Arutyunov, and K. Sh Oisieva. "Issue microcirculation around extended implant-supported prostheses with few abutment sites in patients with terminal mandibular dentition." Parodontologiya 27, no. 3 (September 22, 2022): 263–71. http://dx.doi.org/10.33925/1683-3759-2022-27-3-263-271.
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Relevance. The success of implant-supported prostheses depends on the quality of the jawbone. Traditionally, it is assessed radiographically, but this method is not only invasive but also unreliable and inaccurate for predicting the outcome of treatment.Material and methods. The study included 80 patients (49 women and 31 men) with a mean age of 71 ± 7 years, which formed four groups. Group A (control group, n = 20) consisted of patients with healthy periodontium; comparison group B, n = 20, comprised patients with terminal dentition; the main group C (n = 20) included patients with extended rehabilitation, fixed 7-10 days before; group G (n = 20) was composed of patients with “Trefoil” implant-supported prostheses, fixed three years earlier. The blood flow of peri-implant tissues was assessed using ultrasound Doppler flowmetry (UDF). All patients (n = 20) underwent dual-energy X-ray absorptiometry (DXA) before the prosthetic treatment.Results. The analysis of pre-prosthetic-treatment ultrasound Doppler flowmetry results showed low values of microcirculation in the alveolar ridge mucous membrane in patients with terminal dentition compared with the control group. On the 7th day after implant-supported prosthetic treatment, group C demonstrated an increase in microcirculation by 11.42% compared to the control group and by 147.36% compared to group B. Three years after implant-supported prosthetic treatment, the ultrasound data revealed a statistically significant increase in blood flow velocity 0.342 ± 0.04 (cm/s) (p < 0.01). The Pearson coefficient determined a high correlation between T-scores of DXA and ultrasound Doppler flowmetry data (r = 0.829, p = 0.0001).Conclusion. Ultrasound Doppler flowmetry (UDF) can be the main method for studying the peri-implant tissue condition at various stages of implant-supported prosthetic treatment.
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Anitua, Eduardo, Naiara Larrazabal Saez de Ibarra, and Luis Saracho Rotaeche. "Implant-Supported Prostheses in the Edentulous Mandible: Biomechanical Analysis of Different Implant Configurations via Finite Element Analysis." Dentistry Journal 11, no. 1 (December 23, 2022): 4. http://dx.doi.org/10.3390/dj11010004.
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This study explores the implant-supported prosthetic treatment alternatives of the edentulous mandible from a biomechanical point of view by means of a Finite Element Analysis (FEA). Finite element (FE) models were used to simulate cases treated with six, five, and four, implants and a fixed prosthesis with a cantilever. In the four implant treatments, three cases were analyzed; the posterior implants were placed in axial positions, angled at 30° and 45°. Cases with six and four axially placed implants were also analyzed by placing the posterior implants distally to the foramen, thus eliminating the cantilever in the prostheses. In the cases with implants between foramina, the highest values for the principal strains and von Mises stresses were observed in the case with four implants where the posterior implants were angled at 45°. Cases with implants placed distally to the foramen and without a cantilever showed much lower bone stress and strain levels compared to cases with implants between foramina. From a biomechanical point of view, it seems to be a better option to use implants positioned distally to the foramen, eliminating cantilevers.