Academic literature on the topic 'Dental implants'
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Journal articles on the topic "Dental implants"
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Singh, Ajit. "DENTAL IMPLANT DESIGN- AN INSIGHT OVERVIEW." Journal of Medical pharmaceutical and allied sciences 10, no. 4 (August 15, 2021): 3101–5. http://dx.doi.org/10.22270/jmpas.v10i4.1254.
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Dental implants are a proven therapeutic option for replacing missing teeth, with positive long-term health outcomes. Dental implant performance is largely determined by the implant’s primary durability, which is affected by surgical procedure, bone quality and quantity, implant surface characteristics, implant geometry, and implant surface characteristics. The implant’s geometry and surface can be modified. The implant geometry and surface can be changed if needed to achieve good primary stability and long-term implant therapy effectiveness. Implant architecture refers to the implant’s three-dimensional structure, as well as all of the components and elements that make it up. Different surface topographies can affect a sequence of coordinated actions such cell proliferation, osteoblast transformation, and the production of bone tissue. At the macro, micro, and increasingly nano sizes, surface topography of implants may be detected. The surgical location of end osseous oral implants is influenced by the prosthetic architecture, as well as the shape and quality of the alveolar bone. There are several alternatives for replacing missing teeth, but within the past few decades, dental implants have been one of the most common biomaterials for replacing one (or more) missing teeth. In a substantial number of patients, titanium dental implants have been shown to be secure and reliable. This study examines the most important historical information of dental implants, as well as the various vital factors that will ensure successful Osseo-integration and a safe prosthesis anchorage. Not only
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Leite, Andressa Rosa Perin, Danny Omar Mendoza Marin, Gabriela Giro, Ana Carolina Pero, Ligia Antunes Pereira Pinelli, and José Maurício dos Santos Nunes Reis. "Custom Cast Ball Attachments Used on Outdated Implants to Restore a Maxillary Implant-Supported Overdenture." Journal of Oral Implantology 43, no. 4 (August 1, 2017): 297–301. http://dx.doi.org/10.1563/aaid-joi-d-16-00156.
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The lack of compatible prosthetic components can be a complication during oral rehabilitation using outdated implants. The aim of the present clinical report was to describe an alternative technique for the fabrication of a maxillary implant-supported overdenture in a patient with 20-year-old dental implants using castable spherical patterns and ball attachments. The patient had been wearing a relined bar/clip overdenture in the mandible on 4 external-hexagon dental implants and a relined complete denture in the maxilla on 4 internal-hexagon implants due to abutment screw fracture inside of the implants, losing the attachment system. The remaining maxillary dental implants did not possess attachments compatible with current systems due to configuration changes by the manufacturer in the dental implant's platform and the components over time. Therefore, castable spherical patterns and cast ball attachments were used to fabricate a maxillary implant-supported overdenture. The mandible rehabilitation was performed using 4 osseointegrated dental implants with a fixed implant-supported prosthesis. The use of cast ball attachments on the maxillary dental implants avoided invasive procedures on the remaining implants. Considering the lack of available compatible prosthetic components for the osseointegrated implants, this technique was considered a viable and satisfactory treatment option.
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Ahmed, Naseer, Maria Shakoor Abbasi, Quratulain Mariam, Hanan William, Hafsa Iftikhar, Hamna Badar, and Adil Bin Irfan. "Analysis of Dental Practitioners Perception Towards Dental Implants." Journal of the Pakistan Dental Association 30, no. 1 (February 11, 2021): 45–49. http://dx.doi.org/10.25301/jpda.301.45.
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OBJECTIVE: To investigate the dental practitioner's knowledge, attitude and practice towards dental implants. METHODOLOGY: This study was carried out from May'2019 - Oct 2019. 752 dental practitioners who were currently practicing were included in the study. A well-structured questionnaire was used for data collection. SPSS-25 was used for statistical analysis. Spearman correlation was used to find the effect of gender, knowledge and attitude. The P <0.05 was considered statistically significant. RESULTS: In this study 80.9% dental practitioners were aware of the appropriate implant material while, 57.9% had knowledge about the types. 30.3% knew about the implant surface modifications whereas 46.1% dentists were aware of possible implant placement approaches. 49.3% believed that the distance between dental implants to be 3mm and between a dental implant and natural tooth to be 1.5 mm. 76% dentists claimed that dental implants have biomechanical complications. Whereas 67.8% knew about the Branemark's theory of osseointegration. Regarding the attitude of dental practitioners, 28.9% had received implant hands on trainings while 9% felt competent to place an implant. CONCLUSION: This study describes that dental practitioners had an appropriate knowledge of each aspect of implantology. Moreover despite the fact majority felt that they are not competent enough to practice it. Thus, it is important that the curriculum, teaching standards, the materials and methods regarding dental implants need to be reviewed and more exposure of hands-on workshops is to be provided not only for the graduates but also the undergraduates during their clinical learning. KEYWORDS: Dental Implants, Dentist's opinion, Knowledge HOW TO CITE: Ahmed N, Abbasi MS, Mariam Q, William H, Iftikhar H, Badar H, Irfan AB. Analysis of dental practitioners perception towards dental implants. J Pak Dent Assoc 2021;30(1):45-49
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Han, Jian Ye, Zhen Tao Yu, Sen Yu, Xi Qun Ma, Jin Long Niu, and Xin Jie He. "The Surface Modifications of Dental Implants that are made of a Near-β Type Titanium Alloy." Materials Science Forum 618-619 (April 2009): 299–302. http://dx.doi.org/10.4028/www.scientific.net/msf.618-619.299.
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Abstract Titanium and its alloys are widely used as dental implant materials due to their excellent biocompatibility, mechanical properties and erosion resistance. The b type titanium alloys are becoming more promising dental implant materials for their low elastic modulus and suitable mechanical properties. Because the titanium alloys are bioinert. The dental implant’s surfaces that contact with bone tissues need modification. To bioactivate the implants, hydroxyapatite/TiO2 composite material was coated onto dental implants by sol-gel and micro arc oxidation (MAO) methods. The HA (Hydroxyapatite) was employed to enhance the bioactivity of the Ti substrate. Owning to TiO2, the HA/TiO2 composite coatings adhered tightly to the dental implants and no longer existed cracks.
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Özkurt, Zeynep, and Ender Kazazoğlu. "Zirconia Dental Implants: A Literature Review." Journal of Oral Implantology 37, no. 3 (June 1, 2011): 367–76. http://dx.doi.org/10.1563/aaid-joi-d-09-00079.
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Abstract Titanium and titanium alloys are widely used for fabrication of dental implants. Because of potential immunologic and possible esthetic compromises with titanium implants, novel implant technologies are being developed. However, these novel technologies must maintain the characteristics that provide titanium implants with their high success rates. Zirconia implants were introduced into dental implantology as an alternative to titanium implants. Zirconia seems to be a suitable implant material because of its toothlike color, mechanical properties, biocompatibility, and low plaque affinity. The aim of this study is to review clinical and research articles conducted on zirconia dental implants, compare them with titanium dental implants, and provide information on zirconia dental implant osseointegration and mechanical strength. Zirconia dental implants have the potential to become alternative dental implants to titanium dental implants, but they are not yet in routine clinical use.
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Vermeulen, Lisa, Aladdin Speelman, Valdiela Daries, and Vincent Philips. "Development of a radiographic dental implant guide for identification of dental implant types." South African Dental Journal 75, no. 8 (September 30, 2020): 432–37. http://dx.doi.org/10.17159/2519-0105/2020/v75no8a3.
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INTRODUCTION: Identification of dental implant types can be a complex process for inexperienced health care professionals. Dental implants can have subtle differences in their morphology, which make it difficult to distinguish them from one another The unique appearance of dental anatomy and the placement of custom restorations ensure accurate identification of bodies or human remains when radiographic techniques are correctly applied. AIMS AND OBJECTIVES: To develop a radiographic dental implant guide for ten common dental implant types currently used in the Western Cape, South Africa; using their morphological characteristics observed on pantomographs. DESIGN: The methodology considered for this research study was a positivist approach through a quantitative, exploratory, non-experimental research design. METHODS: Ten commonly used dental implants were radiographed at straight tube (ST), off-centre (OC) and severe off-centre (SOC) angles to create a reference instrument Two reviewers used the morphologies of the different dental implant types, namely the apex, thread and neck, observed on ante-mortem pantomographs, and compared it to the appearance of the dental implants in the reference instrument to make a positive identification match. The straight tube image of all ten dental implant types in the reference instrument was used as the initial point of reference to positively identify the morphological characteristics of each dental implant type on the pantomographs. RESULTS: A total of 380 dental implants could be identified on 105 pantomographs reviewed. Of the 380 dental implants, 350 dental implants (91%) were identified as dental implant types listed in the reference instrument while 30 dental implants were identified as another type of dental implant type not listed in the reference instrument A total of 208 dental implants (54.2%) could be positively identified on the ante-mortem pantomographs using the straight tube images in the reference instrument. The morphological characteristics of the dental implant types were described using x-ray imaging of dental implants. The ten commonly used dental implants types could be positively identified by two independent reviewers and based on this a radiographic dental implant guide was developed. CONCLUSION: Each dental implant type had unique morphological characteristics as well as similarities which enabled distinction between the different dental implant types. The dental implant guide developed could be used by dentistry and radiography students. The dental implant guide may be useful in the field of forensic dentistry and forensic radiology.
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Karşıyaka Hendek, Meltem, Kubilay Barış, and Ebru Olgun. "Short dental implants." Journal of Dental Sciences and Education 1, no. 3 (September 30, 2023): 95–97. http://dx.doi.org/10.51271/jdse-0016.
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Short dental implants have been successfully used to support single and multiple fixed reconstructions in atrophic jaws, despite an increased crown-to-implant ratio. The use of short dental implants allows the treatment of patients for whom complex surgical techniques cannot be performed for medical, anatomical, or financial reasons. Furthermore, the use of short dental implants in clinical practice reduces morbidity, cost, and treatment time and reduces the need for complex surgery. The aim of this review is to evaluate the survival rates of short and extra-short dental implants and to discuss the impact of an increased crown-to-implant ratio on biologic and technical complications.
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Mohammadi, Bijan, Zahra Abdoli, and Ehsan Anbarzadeh. "Investigation of the Effect of Abutment Angle Tolerance on the Stress Created in the Fixture and Screw in Dental Implants Using Finite Element Analysis." Journal of Biomimetics, Biomaterials and Biomedical Engineering 51 (June 14, 2021): 63–76. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.51.63.
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Today, an artificial tooth root called a dental implant is used to replace lost tooth function. Treatment with dental implants is considered an effective and safe method. However, in some cases, the use of dental implants had some failures. The success of dental implants is influenced by several biomechanical factors such as loading type, used material properties, shape and geometry of implants, quality and quantity of bone around implants, surgical method, lack of rapid and proper implant surface's integration with the jaw bone, etc. The main purpose of functional design is to investigate and control the stress distribution on dental implants to optimize their performance. Finite element analysis allows researchers to predict the stress distribution in the bone implant without the risk and cost of implant placement. In this study, the stresses created in the 3A.P.H.5 dental implant's titanium fixture and screw due to the change in abutment angles tolerance have been investigated. The results show that although the fixture and the screw's load and conditions are the same in different cases, the change of the abutment angle and the change in the stress amount also made a difference in the location of maximum stress. The 21-degree abutment puts the fixture in a more critical condition and increases the chance of early plasticization compared to other states. The results also showed that increasing the abutment angle to 24 degrees reduces the stress in the screw, but decreasing the angle to 21 degrees leads to increased screw stress and brings it closer to the fracture.
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Vicente Neto, Pedro, Ana Lúcia Franco Micheloni, Cássio Rocha Scarduelli, Karina Eiras Dela Coleta Pizzol, Francisco De Assis Mollo Júnior, and Elcio Marcantônio Júnior. "Predictability and success rate of short implants." Journal of Research in Dentistry 5, no. 2 (February 28, 2018): 28. http://dx.doi.org/10.19177/jrd.v5e2201728-31.
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In oral rehabilitation with dental implants, severely resorbed alveolar ridges are a challenging problem due to the reduced height of the residual bone. Continuous search for minimally invasive procedures has resulted in the conception of reduced-length dental implants, decreasing the necessary amount of bone for implantation, thereby reducing the need of bone-grafts. Given the growing demand in the field of implant dentistry and the continuous development of surgical techniques, this study aimed to review the current literature on the predictability and success rate of short implants. Relevant articles published in the PubMed database between the years of 2004 and 2014 were selected using the following key-words: short dental implants, extra-short implants, survival rate, implant, mandible, maxilla, prognosis, implant survival, implant length. Based on the literature review, we concluded that short implants showed high predictability and high success rate in the short term, therefore they are one of the current options for the rehabilitation of atrophic alveolar ridges. Further longitudinal studies are necessary to define more reliably parameters for their proper use, ensuring the achievement of high success rates and survival rates with the use of this type of implant.o assess the attitude and practice of dental professionals towards using of advance radiographic technique.
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Horwitz, Jacob, Eli E. Machtei, Shai Frankental, Eran Gabay, Yaniv Mayer, Livia Joseph, and Omer Cohen. "Clinical and Patient-Related Outcomes of a Tapered Implant System With Switched Platform Conical Abutments: A Private Practice Field Trial." Journal of Oral Implantology 44, no. 5 (October 1, 2018): 326–29. http://dx.doi.org/10.1563/aaid-joi-d-18-00005.
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The aim of this prospective cohort observational field trial was to examine 1-year survival and success rates of a recently introduced tapered implant system with switched platform conical abutments and to evaluate patient related outcomes of therapy. Partially edentulous patients aged between 18 and 75 years, with available bone height for dental implants ≥10 mm desiring to restore the missing tooth/teeth with implant supported restoration, were recruited by 7 periodontists in their respective private practices. Dental implants were installed according to standard implant therapy protocol. Three to 6 months postoperatively, after evaluating interim implant success, implants were restored by the referring dentists. Patient, Ramfjord teeth, and implant data, including baseline and 1-year postoperative, were collected. A total of 60 patients were recruited and received 117 implants. Complete 1-year clinical and radiographic data were available for 83 and 65 implants, respectively. Two implants failed during the first year, resulting in a 1-year survival rate of 98.3%. Mean implant probing pocket depth was 2.29 ± 0.84 mm. Mean radiographic bone distance from implant's shoulder at the mesial and distal sites at 1 year was 0.66 ± 0.5 and 0.79 ± 0.64mm, respectively, resulting in a success rate of 95.4%. Patient subjective evaluation of therapy exhibited a median pain experience of 1 and median esthetics, function, and general satisfaction evaluation of 10 on a scale of 1 to 10. The tapered conical connection dental implant system, used in private dental practices, shows good 1-year survival and success rates that are similar to other implant systems on the market.
Dissertations / Theses on the topic "Dental implants"
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Hultin, Margareta. "Factors affecting peri-implant tissue reactions /." Stockholm, 2001. http://diss.kib.ki.se/2001/91-628-4761-9/.
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Vermeulen, Lisa. "Development of a radiographic dental implant guide for forensic identification using current dental implants." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2755.
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Thesis (MSc (Radiography))--Cape Peninsula University of Technology, 2018.Introduction: Forensic dentistry plays a key role in identifying human remains that cannot be identified visually or by other means. Studies have shown that in cases of single or multiple deaths, scientific identification of human remains utilising forensic dentistry is often the most successful source of identification. Dental identification of human remains consists of a very complex procedure that makes it necessary during the investigation process to use and compare unique dental identifiers. A reliable and accurate method of identifying human remains is a positive radiological identification between ante-mortem and post-mortem images of dental radiographic images. Even if ante-mortem radiographic images may not be present during the identification process, post-mortem images may include details of dental restorations such as dental implants which cannot be seen during visual examination. The different types of dental implants vary in morphology and in conjunction with the unique appearance of dental anatomy and the placement of custom restorations such as dental implants, it has been found to accurately assist in the identification of human remains. Objectives: To establish a radiographic dental implant guide for ten commonly used dental implant types in the Western Cape, South Africa; and to identify and describe the morphological characteristics of these dental implant types as observed on pantomographs. Methods: The ten commonly used dental implant types were imaged radiographically to create a reference instrument which served as a tool for identifying and comparing different types of dental implants. The morphologies of the different dental implants, specifically the apex, thread and neck, were observed on ante-mortem pantomographs and compared to the appearance of the dental implants on the reference instrument to make a positive match. The straight tube image of all ten dental implant types in the reference instrument was used as the point of reference to positively identify the morphological characteristics of each dental implant type on the pantomographs. The morphological characteristics of the ten commonly used dental implant types used in the Western Cape were described and based on this a radiographic dental implant guide was developed. Results: A total of 384 dental implants were observed on the pantomographs. Of these, 380 dental implants could be positively identified on the pantomographs while 4 dental implants could not. A total of 350 dental implants (91%) were identified as dental implant types listed in the reference instrument while 30 dental implants were identified as a dental implant type not listed in the reference instrument. A total of 208 dental implants (54.2%) could be positively identified using the morphological characteristics namely the apex, thread and neck on the straight tube images of the dental implant type in the reference instrument. The radiographic dental implant guide was developed based on positive identification of the morphological characteristics of the dental implant types. Conclusion: This research study has illustrated that the morphology of dental implants can be used to differentiate between different dental implant types on pantomographs. Each dental implant type had unique morphological characteristics as well as similarities which enabled distinction between the different dental implant types, which facilitated dental implant identification and the development of a radiographic dental implant guide. The radiographic dental implant guide developed as part of this research study, may be useful in the field of forensic dentistry and forensic radiology.
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Blázquez, Hinarejos Mónica. "Diferencias histológicas en la adhesión del tejido conectivo alrededor de pilares sobre implantes tratados con láser y pilares convencionales." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/461943.
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INTRODUCCIÓN.
Uno de los retos más importantes hoy en día en implantología oral es evitar la pérdida ósea alrededor de los implantes oseointegrados y funcionales con el paso del tiempo.
Una de las superficies que se ha desarrollado en los últimos años es la resultante de la microtexturación mediante láser. Diversos estudios han demostrado la adhesión del tejido conectivo a las superficies tratadas con láser en la zona cervical de los implantes oseointegrados, consiguiendo de este modo un sellado biológico a este nivel. Otras investigaciones hacen pensar que este sellado o adhesión mediante fibras de colágeno podría ser beneficioso en el pilar prostodóncico definitivo que se fija al implante. Se adquiriría mejor sellado en la zona cervical del pilar, de este modo se evitaría la migración bacteriana a este nivel y por consiguiente la pérdida ósea alrededor del implante.
OBJETIVOS.
Comparar las diferencias de adhesión del tejido gingival circundante entre los pilares tratados mediante láser y los pilares sin dicho tratamiento de superficie en humanos.
MATERIAL Y MÉTODOS.
Se involucran en el estudio clínico un total de seis participantes y doce implantes insertados, seis de ellos conectados a pilares con tratamiento láser y los otros seis a pilares de titanio lisos sin tratamiento de superficie. Tras 90 días de la inserción quirúrgica se retiran los pilares junto a 1 mm de tejido gingival y se procesan las muestras para su observación histológica.
RESULTADOS.
En las fotografías de microscopia óptica se observa que no existe unión del tejido gingival al pilar liso, contrariamente a lo sucedido en los pilares con tratamiento láser donde sí se observa adhesión del tejido.
La media de porcentaje de TAC (Tissue Abutment Contact) en el pilar con tratamiento láser fue del 98,8% y en el pilar control liso fue del 24,1%.
DISCUSIÓN.
Todos los participantes tuvieron una evolución favorable con una cicatrización óptima de los tejidos y se rehabilitaron definitivamente con un pilar con tratamiento láser. El método utilizado tanto para el procesado de las muestras como para el cálculo de el análisis cuantitativo permitió cumplir los objetivos del estudio. Se plantean futuras líneas de investigación como el seguimiento de los participantes en el estudio a medio o largo plazo.
CONCLUSIÓN.
El tejido conectivo tiene una mejor adhesión a los pilares tratados con láser en comparación a los pilares lisos sin tratamiento de superficie.INTRODUCTION. Achievement of implant stability and maintenance of crestal bone levels are prerequisites for a successful long-term function of dental implants. One of the surfaces which have been developed with that goal is the microtexturizing of the implant neck through laser application. Several studies have shown the adhesion of the connective tissue on the laser treated surfaces on the cervical region of osseointegrated implants, with the achievement of a biological seal at that level. Other studies suggest that this sealing or adhesion through collagen fibers could be benefitial on the final prosthetic abutment which is connected to the implant. This way it would be possible to achieve a sealing around the cervical region of the abutment, avoiding bacterial migration at that level and, therefore, peri-implant bone loss. OBJECTIVE. The goal of the current study is to compare the difference in connective tissue adherence to laser microtextured versus machined titanium abutments. MATERIAL AND METHODS Six patients and twelve dental implants were enrolled in the study, six of them fixed to laser treated abutment and the other six fixed to a machined abutment. Ninety days after the first intervention, second surgery was carried out. The abutment was unscrewed, removing a complex formed by the abutment and the surrounding 1 mm of gingival attachment for its histological assessment. RESULTS In the images of optical microscopy we observed intimate adherence between connective tissue and the laser treated abutments, while on machined abutments no adherence was detected. The mean percentage of TAC (Tissue Abutment Contact) on laser treated abutment was 98.8%, and 24.1% on the machined abutment. DISCUSSION All participants in the study had optimal healing and a treated laser abutment was placed the usual prosthetic protocol. We achieved the study objectives with both histological assessment and quantitative analysis methods. Futures lines of research are proposed as the follow-up of the partcipants in the study for medium or long term. CONCLUSION Connective tissues show enhanced adherence to microtextured abutments compared to machined abutments.
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Barão, Valentim Adelino Ricardo [UNESP]. "Avaliações biomecânicas e biológicas relacionadas às próteses implanto-suportadas e aos implantes osseointegrados." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/105565.
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barao_var_dr_araca.pdf: 1603640 bytes, checksum: 5d48588f784413a0d8cc560b1ff6d9b0 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Objetivos: (1) Investigar o papel de diferentes níveis de pH da saliva artificial (3; 6,5 e 9) no comportamento corrosivo do titânio comercialmente puro (cp-Ti) e da liga Ti-6Al-4V (Capítulo 1); (2) Avaliar a influência do processo de corrosão na afinidade do lipopolissacarídeo (LPS) de Escherichia coli para o cp-Ti e o Ti-6Al-4V (Capítulo 2); (3) Investigar a natureza tribocorrosiva do titânio em saliva artificial em presença de LPS (Capítulo 3); (4) Comparar o efeito de diferentes designs de overdentures implanto-retidas e prótese total fixa implanto-suportada na distribuição de tensões em mandíbula edêntula pelo método de elementos finitos tridimensional (Capítulo 4). Materiais e métodos: Testes eletroquímicos como potencial de circuito aberto, espectroscopia de impedância eletroquímica, e teste potenciodinâmico foram conduzidos. Para o teste de afinidade ao LPS, os espécimes foram tratados com LPS (1,5; 15 e 150 μg/ml) durante 24 horas para avaliar a aderência de LPS. Os discos foram transferidos a cada 24 horas para solução fresca de água livre de LPS até completar 72 horas, para investigar a liberação de LPS. No teste de tribocorrosão, o pH da saliva (6,5), a concentração de LPS (0, 0,15, 15 and 150 μg/ml), a duração do deslizamento (2000 ciclos), freqüência (1,2 Hz) e carga (20 N) foram usados para mimetizar o processo mastigatório. Finalmente, modelos tridimensionais de uma mandíbula edêntula foram construídos. No grupo OR a mandíbula foi restaurada com overdenture retida por implantes não esplitados com sistema de retenção O’ring; nos grupos BC-C e BC as mandíbulas foram restauradas com overdentures retidas por implantes esplintados com sistema de retenção barra-clipe associado ou não a cantilevers distais...
Objectives: (1) To investigate the role of different levels of pH of artificial saliva (pHs 3, 6.5 and 9) under simulated oral environment on the corrosion behavior of commercially-pure titanium (cp-Ti) and Ti-6Al-4V alloy (Chapter 1); (2) To assess the influence of corrosion process on Escherichia coli lipopolysaccharide (LPS) affinity for cp-Ti and Ti-6Al-4V alloy (Chapter 2); (3) To evaluate the tribocorrosive (corrosion/wear) nature of titanium in artificial saliva (pH 6.5) with LPS (Chapter 3); and (4) To compare the effect of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible by using a three-dimensional finite element analysis. Materials and methods: Standard electrochemical tests, such as open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic tests were conducted in a controlled environment. For LPS affinity test, specimens were treated with LPS (1.5, 15 and 150 μg/ml) for 24 hours to evaluated LPS adherence. Discs were then transferred every 24 hours to fresh LPS-free water, up to 72 hours, to investigate LPS elution. In the tribocorrosion test, the pH of saliva (6.5); LPS concentration (0, 0.15, 15 and 150 μg/ml), sliding duration (2000 cycles), frequency (1.2Hz) and load (20 N) parameters mimicked the mastication process. Finally, tridimensional models of an edentulous mandible were constructed. In the OR group, the mandible was restored with an overdenture retained by unsplinted implants with O’ring attachment; in the BC-C and BC groups, the mandibles were restored with overdentures retained by splinted implants with bar-clip anchor associated or not with distally placed cantilevers, respectively; in the FD group, the mandible was restored with a fixed full-arch implant-supported prosthesis... (Complete abstract click electronic access below)
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Palacios, Garzón Natalia. "La pérdida marginal ósea en implantes de conexión externa versus conexión interna e implantes crestales y subcrestales." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/671196.
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INTRODUCCIÓN:
Cuando se coloca un implante, se asume que habrá una pérdida de hueso en la zona más coronal alrededor de este.
La colocación del implante respecto al nivel de hueso ya sea crestal o subcrestal y el tipo de conexión elegida, ya sea conexión externa o interna, se han relacionado como algunos de los factores causantes de la pérdida de hueso alrededor de implantes. La preservación del hueso periimplante, es fundamental porque influye sobre la forma y el contorno de los tejidos blandos suprayacentes, que son importantes para el resultado estético del tratamiento y para el éxito de los mismos.
El objetivo principal de esta tesis fue evaluar la pérdida de hueso marginal tanto en implantes de conexión externa e interna, como en implantes colocados a nivel crestal y subcrestal. Se ha sugerido que en la conexión externa y en la colocación subcrestal de los implantes existe mayor pérdida de hueso marginal, sin embargo, la literatura no es clara al respecto. Por este motivo se realizaron dos revisiones sistemáticas para responder a las siguientes preguntas: “En pacientes tratados con implantes dentales, ¿hay diferencia entre la conexión externa e interna en términos de pérdida ósea marginal alrededor de las conexiones? y ¿hay diferencias entre la colocación subcrestal y crestal en términos de pérdida ósea marginal?
En la primera revisión se analizaron las conexiones. Se incluyeron 10 artículos que incluían 1.523 pacientes con 3.965 implantes. De acuerdo con esta revisión y considerando las limitaciones debidas a los grados de heterogeneidad entre los estudios incluidos, ambas conexiones presentaron altas tasas de supervivencia. Así todo y que la conexión interna es la que parece gozar de mayor reconocimiento en la actualidad; los estudios incluidos en esta revisión, caracterizados por un gran número de muestra y largos periodos de seguimiento demostraron que la conexión externa era una conexión fiable, avalada por estudios de longevidad.
Respecto a la segunda revisión y metaanálisis, en la que se analizó la colocación a nivel crestal o subcrestal de los implantes, se obtuvieron resultados clínicos apropiados.
Teniendo en cuenta la falta de evidencia científica en ambos aspectos y con la intención de poder aportar claridad a la hora de elegir la conexión del implante y su posicionamiento vertical respecto al hueso, planteamos la realización de un ensayo clínico aleatorio, con el objetivo de determinar si la pérdida de hueso difería significativamente entre las dos conexiones y las posiciones verticales del implante.
MATERIAL Y MÉTODO :
Los pacientes fueron reclutados del Máster de Medicina Cirugía e Implantología Oral. Facultat de Medicina i Ciencies de la Salut (Odontología). Y fueron atendidos en el Hospital Odontològic Universitat de Barcelona (HOUB).
Se realizó un ensayo clínico aleatorizado, con un tamaño muestral de 93 implantes (31 de conexión externa y 62 de conexión interna: 33 con diseño para colocación infracrestal y 29 crestal) colocados en 27 pacientes. Se realizaron controles radiológicos el día de la colocación de implantes, al mes y durante la realización de las coronas, también se tuvo en cuenta el Análisis de Frecuencia de Resonancia (AFR) el día de la colocación del implante, cuando se colocó el pilar de cicatrización y durante la realización de la prótesis.
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Chou, Laisheng. "Effects of substratum surface chemistry and topography on extracellular matrix gene expression." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25033.pdf.
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Barbosa, Gabriella Lopes de Rezende 1988. "Mensurações verticais para planejamento de mini-implantes palatinos em telerradiografia em norma lateral e tomografia computadorizada de feixe cônico." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290131.
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Orientador: Solange Maria de AlmeidaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Os objetivos deste estudo foram comparar as mensurações lineares referentes à altura óssea palatina na região de primeiros pré-molares superiores para inserção de miniimplantes palatinos por meio de imagens de telerradiografia em norma lateral (TNL), tomografia computadorizada de feixe cônico (TCFC) e telerradiografia reconstruída do exame tomográfico (telerradiografia virtual); assim como comparar as alturas ósseas das regiões medianas e paramedianas do sítio avaliado. Para tanto, foram utilizadas 110 imagens de TNL, telerradiografia virtual e TCFC, dos mesmos pacientes. Para avaliação das alturas nas imagens, foi realizada mensuração da distância entre a intersecção do longo eixo do primeiro pré-molar com o assoalho do palato duro e o assoalho nasal, a qual correspondeu à dimensão do osso disponível para inserção de mini-implantes de ancoragem. Para avaliação das alturas medianas e paramedianas no corte tomográfico na região de primeiro pré-molar, foram realizadas mensurações da distância entre a camada cortical do assoalho nasal e a cortical do palato duro nos sítios central, 3 mm à direita e à esquerda, 6 mm à direita e à esquerda. As mensurações foram realizadas por três avaliadores. Os valores encontrados da TNL não diferiram estatisticamente (p>0,05) da TCFC (padrão-ouro), sendo comparáveis aos do exame tomográfico. Já os valores da telerradiografia virtual diferiram estatisticamente (p<0,05) tanto da TCFC quanto da TNL, sendo medidas subestimadas quando comparadas ao padrão-ouro e à técnica radiográfica. Quando comparadas as medidas dos sítios avaliados, não houve diferença estatística (p>0,05) entre as alturas paramedianas e a central. Concluiu-se que as mensurações realizadas para planejamento de inserções de mini-implantes palatinos na região dos primeiros prémolares são comparáveis nos exames de TNL e em reconstruções multiplanares de TCFC, e subestimadas nos exames de telerradiografia virtual. Concluiu-se também que as regiões paramedianas bilaterais a 3mm e 6mm da sutura palatina na região avaliada possuem altura óssea comparável à região mediana do palato
Abstract: The aims of this study were to compare linear measurements related to the palatal bone thickness in the region of first premolars to insert palatal mini-implants on images of conventional lateral radiography (CLR), cone beam computed tomography (CBCT) and reconstructed radiography from CBCT scan (virtual radiograph), as well as compare the thickness of the bone regions of the median and paramedian site assessed. For this purpose, 110 images of CLR, virtual radiography and CBCT of the same patient were used. To evaluate the thicknesses on the images, measurements was performed between the distance of the intersection of the long axis of the first premolar to the hard palate floor and nasal floor, which corresponded to the relevant dimension of available bone for insertion of mini-implants. To evaluate the thickness in median and paramedian regions on CT slice in the region of first premolar, measurements were made between the cortical layer of the nasal floor and hard palate, on central site and paramedian sites 3 mm and 6 mm bilaterally. The measurements were performed by three evaluators. The values found on TNL were not statistically different (p> 0.05) of CBCT (gold standard).The values of the virtual radiography were statistically different (p <0.05) from CBCT and TNL, being underestimated when compared to the gold standard and the radiographic technique. When comparing the measurements of the sites studied, there was no statistical difference (p> 0.05) between the thicknesses of the central site and paramedian sites. It was concluded that the measurements made for planning palatal mini-implants, at the level of the first premolars, is comparable on TNL and multiplanar reconstructions of CBCT, while underestimated in virtual radiography examinations. It is also concluded that the bilateral paramedian regions at 3mm and 6mm from the palatal suture, in the region evaluated, have bone thickness comparable to the median region of the palate
Mestrado
Radiologia Odontologica
Mestre em Radiologia Odontológica
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Vasconcelos, Laércio Wonhrath [UNESP]. "Avaliação clínica e da freqüência de ressonância, de implantes instalados por meio de técnica cirúrgica modificada na maxila e submetidos à função imediata." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/103321.
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vasconcelos_lw_dr_araca.pdf: 3387652 bytes, checksum: 665ddeee618bbda24e7caff661ab090e (MD5)Universidade Estadual Paulista (UNESP)
Brånemark et al. (1969) introduziram os implantes osseointegrados como forma de ancoragem para próteses com intuito de substituir os dentes perdidos, tanto na mandíbula como na maxila. Desde então, foram instituídas modificações no protocolo clássico. Entre elas, a submissão dos implantes à função imediatamente após a sua instalação. Esse procedimento tem sido largamente estudado na mandíbula, com altos índices de sucesso, contudo, a literatura é escassa quanto à aplicação desta técnica na maxila. Propôs-se, então, avaliar a função imediata em implantes instalados em maxilas desdentadas totais, no momento da cirurgia e após seis e 12 meses de função. Para tanto foi utilizada uma técnica cirúrgica modificada e a avaliação da estabilidade dos implantes foi feita por meio da análise da freqüência de ressonância. Foram selecionados 10 pacientes, nos quais foram instalados seis implantes na maxila com a submissão dos mesmos à função imediata mediante a instalação de uma prótese fixa, com infra-estrutura metálica, 24 horas após a cirurgia. Estes pacientes foram acompanhados por um período de 12 meses. As medidas da estabilidade do implante foram realizadas no momento da instalação dos implantes (M0) e após seis (M6) e 12 meses (M12). Após o período de acompanhamento, foram obtidos índices de sucesso de 95% para os implantes e 90% para as próteses. Quanto aos valores da estabilidade dos implantes, foi observada uma diferença estatisticamente significativa entre os valores de M0 e M6, e, M0 e M12. Sendo o M0, o momento com maior valor do coeficiente de estabilidade. Não houve diferença estatisticamente significativa entre os valores da estabilidade obtidos no M6 e M12. Quando comparados, o valor da estabilidade para cada implante, não apresentaram diferença estatisticamente significativa no mesmo período de avaliação...
Brånemark et al. (1969) presented the osseointegrated implants as a way to anchorage prosthesis for missing teeth substitution in the jaws. Ever since, modifications in the classical protocol were instituted. Among them, the functional loading of the implants, immediately after their installation. This procedure have been well documented in mandibles, with high success levels, however, literature is scarce about the application of this technique in maxilla. The purpose of this study is to evaluate the immediate function in implants installed in totally edentulous maxillas, at the surgical moment and after six and 12 months of function. For so much, a modified surgical technique was used and implant stability was evaluated through the resonance frequency analysis. Ten patients were selected, who received six implants installed in the maxilla and submitted to immediate function. A metallic infra-structure fixed prosthesis was installed 24 hours after the surgery. The follow-up period was of 12 months. Implant stability measurements were taken at the surgical moment (M0) and after six (M6) and 12 months (M12). After the follow-up period, success rates of 95% for implants and 90% for prosthesis were achieved. As for the implant stability values, significant statistical difference were observed between M0 and M6, and M0 e M12, and no significant statistical difference was observed between M6 and M12. When the stability values of each implant was compared, no significant statistical difference was observed between them for different evaluation periods. It is concluded that the submission of implants, installed in the maxilla through a modified technique, to immediate function is a well predictable procedure, ever since well selected and executed. The resonance frequency analysis is an efficient method for the evaluation of the initial and late implants’ stability.
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Santiago, Junior Joel Ferreira [UNESP]. "Avaliação da influência de diferentes materiais oclusais na confecção de próteses fixas implantossuportadas unitárias com diferentes diâmetros dos implantes osseointegrados: estudo pelo método dos elementos finitos tridimensionais." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/93588.
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santiagojunior_jf_me_araca.pdf: 4599975 bytes, checksum: efdcd7bb205ee8146a6d5463f80ff100 (MD5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
A literatura científica ainda é escassa em relação à influência de diferentes materiais na confecção de próteses fixas implantossuportadas unitárias em relação aos diferentes diâmetros dos implantes osseointegrados na distribuição das tensões; as suas manifestações e repercussões na prática clínica ainda não estão totalmente esclarecidas, sendo a fundamentação científica indispensável. Assim, o objetivo desta dissertação foi avaliar a influência do material de revestimento oclusal na confecção de prótese fixa implantossuportada unitária com diferentes diâmetros de implantes osseointegrados. Para o estudo foram elaborados 08 modelos, representando cada qual uma secção de osso mandibular (osso esponjoso e cortical), com a presença apenas de um implante (Conexão Master Screw, Sistemas de Próteses, São Paulo, Brasil) do tipo hexágono externo de 3.75 mm x 10 mm (4 modelos) e de 5.00 mm x 10 mm (4 modelos) com coroas de porcelana feldspática, ou de resina acrílica, ou de resina composta ou coroa liga de NiCr. Para confecção dos modelos foram utilizados os programas de desenho assistido: Rhinoceros® 3D 4.0 (NURBS Modeling for Windows, EUA) e SolidWorks® 2006 (SolidWorks Corp, Massachusetts, USA). Os desenhos tridimensionais foram exportados para o programa de elementos finitos NEI Nastran® 9.0 (Noran Engineering, Inc, EUA), para geração da malha, aplicação da carga e análise. Os resultados foram visualizados através dos mapas de tensão von Mises de cada modelo proposto, a fim de avaliar as variações individuais da distribuição das tensões no implante e na coroa; no osso os resultados foram visualizados através dos mapas de tensão máxima principal. Na carga axial (200 N), o osso cortical não mostrou grandes diferenças entre todos os modelos e o osso trabecular sofreu um aumento das tensões por tração...
The scientific literature is still scarce about the influence of different veneering materials used in fabricating superstructures for implant-retained fixed prostheses in relation to different implant diameters on stress distribution, and the manifestations and implications in clinical practice were not clarified. The aim of this dissertation was to evaluate the influence of occlusal material for single implant-supported fixed prostheses with different implant diameters. For this study were simulated 8 models, representing a section of the mandibular bone (trabecular and cortical bone) with a single external hexagonal implant (Master Screw, Conexão Sistema de Prótese ltda., Sao Paulo, Brazil) of 3.75 x 10 mm (4 models) and 5.00 mm x10 mm (4 models) with a crown with different occlusal materials: feldspathic porcelain crowns, or acrylic resin or composite resin crown or NiCr alloy. The models were designed using computer-aided design softwares : Rhinoceros® 3D 4.0 (NURBS Modeling for Windows, USA) and SolidWorks® 2006 (SolidWorks Corp., Massachusetts, USA). The three-dimensional designs were exported to the finite element program NEI Nastran® 9.0 (Noran Engineering, Inc, USA) for mesh generation, load application and analysis. The results were visualized through von Mises stress maps of each model, to assess individual variations of the stress distribution on the implant and crown; bone results were visualized through maps of maximum principal stress. In axial loading (200 N), cortical bone showed no significant differences in all models,on the trabecular bone the tensile stress increased, with regular implant diameter. For non-axial loads (100 N), the cortical bone, the tensile stress increased significantly on the side common the load application, when it reduced the implant diameter; in the trabecular bone showed seemed stress patterns, although more... (Complete abstract click electronic access below)
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Bacchi, Ataís 1986. "Influência do material de infraestrutura e do desajuste vertical de próteses parciais fixas implantossuportadas nas tensões transmitidas às estruturas protéticas e ao tecido ósseo peri-implantar." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288548.
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Orientador: Rafael Leonardo Xediek ConsaniDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo neste estudo foi avaliar a influência do material de infraestrutura e diferentes níves de desajuste vertical na concentração de tensões em prótese parcial fixa implantossuportada (infraestrutura e porcelana de cobertura), parafuso de retenção e tecido ósseo peri-implantar durante o assentamento protético e frente à aplicação de carga oclusal. Um modelo tridimensional de elementos finitos de uma porção posterior de mandíbula contendo dois implantes osseointegrados nas posições de segundo pré-molar e segundo molar, suportando uma prótese parcial fixa foi construído utilizando software específico de modelagem (SolidWorks 2010). Modelos de elementos finitos foram obtidos pela importação do modelo sólido ao software de simulação mecânica (ANSYS Workbench 11). Os modelos foram separados em grupos de acordo com o material de infraestrutura (liga de ouro tipo IV, liga de prata-paládio, titânio comercialmente puro, liga de cobalto-cromo ou zircônia) e o nível de desajuste vertical (10 ?m, 50 ?m e 100 ?m) criado na interface prótese-implante do segundo pré-molar. A concentração de tensões foi avaliada nas seguintes condições: (1) assentamento protético; e (2) cargas oclusais simultâneas de 110 N vertical e 15 N horizontal em cada dente. Os resultados obtidos mostraram que as infraestruturas mais rígidas apresentam maior concentração de tensões internas; entretanto, promoveram menores concentrações de tensão sobre a porcelana de recobrimento, em ambas condições avaliadas. Na análise do assentamento protético, materiais mais rígidos para infraestruturas aumentaram os valores de tensão no parafuso de retenção e não causaram diferença relevante nas tensões no tecido ósseo peri-implantar. Quando a carga foi aplicada, o uso de infraestruturas mais rígidas promoveu redução de tensões no parafuso de retenção e no tecido ósseo peri-implantar. Em ambas condições avaliadas um considerável aumento na concentração de tensões foi obsevado em todas as estruturas com a amplificação do desajuste. Nas diferentes simulações, o material de infraestrutura exerceu considerável influência nas tensões transmitidas às estruturas avaliadas, exceto ao tecido ósseo peri-implantar em condições de assentamento. Aumento de tensões em todas as estruturas pode ser observado com o aumento do desajuste
Abstract: The aim in this study was to evaluate the influence of the framework material and vertical misfit on the stresses created in an implant-supported partial prosthesis (framework and porcelain veneer), retention screw and peri-implant bone tissue during the settlement of the prosthesis and under load conditions. A 3-D Finite Element model of a posterior part of a jaw with two osseointegrated implants at the place of the right second pre-molar and second molar supporting an implant-supported fixed partial prosthesis was constructed using specific modeling software (SolidWorks 2010). Finite element models were obtained by importing the solid model into mechanical simulation software (ANSYS Workbench 11). The models were divided into groups according to the framework material (type IV gold alloy, silver-palladium alloy, commercially pure titanium, cobalt-chromium alloy or zirconia) and vertical misfit level (10 ?m, 50 ?m and 100 ?m) created at the second pre-molar implant-prosthesis interface. The stress concentration was evaluated in the following conditions: (1) settlement of the prosthesis; and (2) simultaneous loads of 110 N vertical and 15 N horizontal in each tooth. The obtained results showed that stiffer frameworks presented higher stress concentrations in it and led to lower stresses in the porcelain veneer, in both conditions. In the analysis of settlement of the prosthesis, stiffer framework materials increased the stress values in the retention screw and did not cause a relevant difference in the stresses values in peri-implant bone tissue. When the load was applied, the use of more stiffness frameworks led to lower stresses in the retention screw, and peri-implant bone tissue. In both conditions evaluated, considerable raise of stress concentration was observed in all the structures within misfit amplification. Comparing the results of the different simulations, the framework materials presented a considerable influence on the stress concentration in the structures evaluated, except on the peri-implant bone tissue during the settlement of the prosthesis, while a considerable increase of the stress in all the structures was observed with the increase of the misfit
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Books on the topic "Dental implants"
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Johns, R. B. Dental implants. Sheffield: Audio Visual and Television Centre, University of Sheffield, 1988.
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National Institutes of Health (U.S.), ed. Dental implants. [Bethesda, MD]: U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, 1988.
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M, Watson Roger, and Searson Lloyd J. J, eds. Dental implants. Edinburgh: Churchill Livingstone, 2003.
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Hobkirk, J. A. Introducing dental implants. Edinburgh: Churchill Livingstone, 2003.
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Denissen, Harry. Hydroxylapatite implants. Padua: Piccin, 1985.
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Jokstad, Asbjorn, ed. Osseointegration and Dental Implants. Oxford, UK: Wiley-Blackwell, 2009. http://dx.doi.org/10.1002/9780813804644.
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Asbjorn, Jokstad, ed. Osseointegration and dental implants. Ames, Iowa: Wiley-Blackwell, 2008.
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Inc, Biomedical Business International, ed. The Dental implants market. Tustin, CA, U.S.A. (17722 Irvine Blvd., Tustin 92680): Biomedical Business International, 1988.
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1921-, Fagan Maurice J., and American Academy of Implant Prosthodontics., eds. Implant prosthodontics: Surgical and prosthetic techniques for dental implants. Chicago: Year Book Medical Publishers, 1990.
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Palmer, R. Implants in clinical dentistry. 2nd ed. New York: Informa Healthcare, 2011.
Find full textBook chapters on the topic "Dental implants"
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Jacobs, Reinhilde, and William C. Scarfe. "Dental Implants." In Maxillofacial Cone Beam Computed Tomography, 745–830. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_20.
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Freilich, Martin A., David M. Shafer, and Steven Halepas. "Dental Implants." In Evidence-Based Oral Surgery, 433–60. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-91361-2_21.
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Silver, Frederick H. "Dental Implants." In Biomaterials, Medical Devices and Tissue Engineering: An Integrated Approach, 220–35. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0735-8_7.
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Belser, Urs C., and Jean-Marc Meyer. "Dental Implants." In Infections Associated with Indwelling Medical Devices, 373–93. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555818067.ch18.
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Spatz, Harrison, and Peter Pasciucco. "Dental Implants." In Dental Science for the Medical Professional, 141–44. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38567-4_14.
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Heimke, Günther, and Cornelius G. Wittal. "Osseointegrated Dental Implants." In Biomaterials Engineering and Devices: Human Applications, 67–92. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-197-8_5.
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Tomasetti, Boyd J. "A Short History of Dental Implants." In Short Implants, 1–7. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44199-9_1.
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Deporter, Douglas. "Short Implants." In Minimally Invasive Dental Implant Surgery, 191–207. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119421405.ch10.
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Neugebauer, Joerg, Douglas Deporter, and Daniel R. Cullum. "Narrow Implants." In Minimally Invasive Dental Implant Surgery, 208–18. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119421405.ch11.
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Bidra, Avinash S. "Prosthodontic management of malpositioned implants and implant occlusion complications." In Dental Implant Complications, 559–5571. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119140474.ch25.
Full textConference papers on the topic "Dental implants"
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Faegh, Samira, and Sinan Müftü. "Load Transfer Along the Bone-Dental Implant Interface." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206815.
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Endosseous dental implants are used as prosthetic treatment alternatives for treating partial edentulism [1]. Excellent long term results and high success rates have been achieved using dental implants during the past decades. Further improvements in implant protocols will include immediate loading, patient specific implants, applications for patients with extreme bone loss and extreme biting habits such as bruxism. The implant designs available in the market vary in size, shape, materials and surface characteristics [2], and address some of these concerns. An important factor in the implant design is the load transfer from the implant to bone during occlusal loading.[2,3] Load transfer starts along the bone-implant interface, and is affected by the loading type, material properties of the implant and prosthesis, implant geometry, surface structure, quality and quantity of the surrounding bone, and nature of the bone-implant interface [4]. While many studies using the finite element method (FEM) have been carried out [2–5], a systematic investigation of the load transfer at the bone implant interface, and the effects of various parameters that make the implant contour is lacking. The goal of this paper is to investigate one aspect of this multivariable problem, namely the effect of external implant threads on the load transfer along the bone-implant interface.
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Sego, T. J., Yung-Ting Hsu, Tien-Min Gabriel Chu, and Andres Tovar. "Towards the Optimal Crown-to-Implant Ratio in Dental Implants." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67889.
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Short dental implants are commonly recommended to be implemented with small crown-to-implant (C/I) ratios due to their mechanical stability — decreasing C/I ratios cause less deformation in skeletal tissue under occlusal force. However, the long-term stability of short implants with high C/I ratios remains a controversial issue due to biomechanical complications. This study evaluates the strain distribution and functional implications in an implant-supported crown with various C/I ratios using a high-fidelity, nonlinear finite-element model. Several clinical scenarios are simulated by loading implants with various implant lengths (IL) and crown heights (CH). Strain distribution and maximum equivalent strain are analyzed to evaluate the effects and significance of CH, IL, and the C/I ratio. The study shows underloading for certain implant configurations with high C/I ratio. Increasing IL and decreasing C/I in moderation demonstrates a positive effect in long-term stability.
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Culjat, M. O., Mijin Choi, R. S. Singh, and S. N. White. "Ultrasound imaging of dental implants." In 2012 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2012. http://dx.doi.org/10.1109/embc.2012.6345966.
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Baker, Maribel I., Jack E. Lemons, and Alan W. Eberhardt. "Bone Properties Surrounding Hydroxyapatite-Coated Custom Osseous Integrated Dental Implants." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19020.
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Dental implants are widely used for replacement of teeth and correction of defects in maxillary and mandibular bone. Their effectiveness is largely dependent upon biostability and osteointegration between the bone and implant. One of the major causes of dental implant failure is aseptic loosening or resorption of bone at the interface [2]. In order to diminish such failures, coatings and surface roughening are used to enhance osteointegration and biostability between the bone and the implant [3].
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Aziz, Imran, Waleed A. Khan, Faisal Moeen, Imran Akhtar, and Wasim Tarar. "Effect of Varying Diameter of Dental Implants During Placements in Compromised Bony Ridges at Different Insertion Torques: A Finite Element Study." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38388.
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The life of dental implant depends on various parameters such as insertion torque, implant diameter and cortical and cancellous bones thickness. The thickness of the cortical and cancellous bones varies from patient to patient and for each thickness, the corresponding studies are required to determine the favorable implant loading. In this study, stress analysis on various dental implant fixtures inserted in compromised bony ridges is performed using three dimensional finite element analyses. Initially, the modeling and analysis of previously analyzed structure is done to validate the solution procedure. After successful validation, three dimensional linear elastic analysis of bone implant bone assembly is performed. The implant material is treated as isotropic whereas the bone materials are taken as anisotropic materials. The parametric study finds the effect of insertion torque and variation of implant diameter on stress induced in the compromised bony ridge. Further, the implant bone assembly was analyzed using various cortical bone thicknesses. It has been observed that the increase in torque results in increased stress and deformation in the bone. With increasing bone thickness, the similar variation of torque produces less stress and deformation in dental implants. The study is helpful in prediction of favorable implant loading and implants diameters for compromised bony ridges. The study provides useful knowledge in improving the performance and life of dental implants.
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O’Callaghan, John, Robert Birichi, Timothy Goddard, John Jagodnik, and Sean Westbrock. "Abutment Hammering Tool for Dental Implants." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/de-25112.
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Abstract One method for installing dental prosthetics uses components fastened with a tapered interference fit. An abutment is fastened into an implant to provide an anchor for the prosthesis. The current method of installation involves hammering with a dental mallet, which provides inconsistent force. A proposal to replace this method is presented. The mechanics of the taper lock were examined to determine the optimal seating force. The chosen design was analyzed for potential weaknesses. A proof of concept prototype was fabricated and a prototype is being manufactured for further analysis. Experimentation indicates that the variance of applied force is significantly reduced.
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Bozkaya, Dinc¸er, and Sinan Mu¨ftu¨. "The Effect of Bone Modulus on the Stress Distribution in a Dental Implant: A 3D Finite Element Analysis." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32595.
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The long-term success of dental implants depends, in part, on the stress distribution created in the bone, when the implant is loaded by biting forces. In this presentation, we present our findings on the stress distribution characteristics of a dental implant by varying bone mechanical properties surrounding the implant.
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Lee, Choongryeong, and Hyun-Yong Jeong. "A Fatigue Test to Assess the Deformation Behavior of Dental Implants." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38336.
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A purpose of this paper is to analyze the effects of material properties and design of a jig on fatigue test results of dental implants. An implant fatigue test method is specified in ISO14801 [1], but it is not described well about the fatigue test jig. The jig of ISO14801 has to firmly hold the fixture, and the elastic modulus of the jig should be more than 3 GPa. These requirements are not sufficient enough to represent the dental implant in the jawbone because the fixture is osseointegrated in the jawbone that is made up with the cortical bone and cancellous bone. In this paper three different materials were used for the jig, and two different fixation methods to hold the fixture were examined in several FE (Finite Element) simulations and fatigue tests. From the simulation and test results, the effects of material properties and design of the jig were evaluated in the light of fatigue life of dental implants.
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Prabhu, Ajit A., and John B. Brunski. "An Overload Failure of a Dental Prosthesis: A 3D Finite Element Nonlinear Contact Analysis." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0268.
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Abstract Dental implants are extensively used to treat fully and partially edentulous patients. However, the success rates of clinical cases involving partially edentulous patients is lower than the fully edentulous cases.1 In one partially edentulous case that we have been examining, a prosthesis was supported by two screw-shaped, 3.75mm diameter Branemark implants as shown in Figure 1. The implants were separated by 7mm and were located in the molar region of the mandible. After the insertion of the implants and a healing period of 6 months, the prosthesis was put into function. After 3 months of loading, there was significant bone loss near the mesial implant which eventually lead to its mechanical failure. We have previously made a biomechanical analysis of this failed implant case using analytical2 and 3D finite element (FE) analysis.3 In the previous 3D FE study, the interface between the implant and the bone was assumed to be fully bonded. In this current investigation, the assumption of bonding vs no bonding is further investigated using 3D contact analysis. Surface to surface contact is a phenomenon that occurs between two contacting surfaces which are close to each other and might be in contact or separated depending on the interfacial stresses between the two surfaces. In this study the contact analysis is used to capture the bonding and non bonding between the bone and the implant interface.
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Öztoprak, Kaan, and Ece Öztoprak. "Investigation of Acid Residue on the Surface of Dental Implants after Different Surface Cleaning Processes." In The 9th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2022. http://dx.doi.org/10.24264/icams-2022.ii.20.
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For dental implants to osseointegrate well, all clinical and production conditions must be perfect. Due to some negativities in production conditions, unwanted residual materials may remain on the implant surfaces, and these may adversely affect osseointegration. While producing implants, some surface treatments are required. These processes are generally based on the principle of increasing the surface area. Thus, they can provide attachment to the bone on more surfaces. Most methods applied to increase the implant surface area include acidic chemicals. After the acid is applied to the implant surfaces, the acid in the pits formed on the surface must be removed entirely. In cases where the acid cannot be completely removed, the remaining acid may cause bone destruction and cause implant loss. For this reason, some processes must be applied to remove residual acid. In this study, we aimed to find better ways to clean the acid residues on the implant surface. We created 2 groups of 20 implants in our study. Micro arc oxidation was applied with sulfuric acid in 2 groups and then washed with distilled water in a 180-watt ultrasonic cleaner. One group of implants was washed with pure water only, and the other group was washed with pure water and chemically neutralized. Sodium Bicarbonate 10% solution was prepared and washed for neutralization; the second group was kept in this solution for 10 minutes and washed with distilled water again. The implants in both groups were placed in 10cc ph7 distilled water and left for one day. After one day, the liquids were measured with a digital pH meter. In the measurement of the water in the group that was washed only with pure water, the average pH was 6.8, while the average pH of the water in the other group was 7. Our study concluded for the first time that basic neutralization on the implant surface could neutralize the acid residue in the microwells. We recommend chemical neutralization in implant manufacturing processes and think it can reduce implant failure rates.
Reports on the topic "Dental implants"
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López-Valverde, Nansi, Javier Aragoneses, Antonio López-Valverde, Cinthia Rodríguez, and Juan Manuel Aragoneses. Role in the osseointegration of titanium dental implants, of bioactive surfaces based on biomolecules: A systematic review and meta-analysis of in vivo studies. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, June 2022. http://dx.doi.org/10.37766/inplasy2022.6.0076.
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Review question / Objective: Does the bioactive surface of titanium dental implants, based on biomolecules, influence osseointegration?. The aim of our study was to evaluate the role and efficacy of bioactive surfaces in osseointegration. Our review study limited the research interest to titanium dental implants coated with a biomolecule, i.e., an organic molecule produced by a living organism. Condition being studied: In recent years, much attention has been paid to topographical modifications of dental implant surfaces, as well as to their coating with biologically active substances.a bioactive surface is one capable of achieving faster and higher quality osseointegration, shortening waiting times and solving situations of poor bone quality. Molecules that can be applied for bioactive purposes include bioceramics, ions and biomolecules. Collagen and bone morphogenetic protein have been suggested as bone stimulating agents. Biofunctionalization of the implant surface with a biomimetic active peptide has also been shown to result in a significant increase in bone-to-implant ratios and an increase in peri-implant bone density.
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Vélez, Rómulo Andrés, Alejandro Fereño Caceres, Wilson Daniel Bravo Torres, Daniela Astudillo Rubio, and Jacinto José Alvarado Cordero. Primary stability with the osseodensification drilling technique for dental implants in low density bone in humans: a systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, September 2022. http://dx.doi.org/10.37766/inplasy2022.9.0066.
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Review question / Objective: - Does the osseodensification drilling technique increase primary stability in low-density bone? - The aim of the present investigation was to evaluate primary stability in dental implants in people with low density bone using the osseodensification technique. Condition being studied: The replacement of missing teeth through dental implants is currently the most practiced in dental clinics. The main criterion for determining the success of an implant is osseointegration, which is a direct structural and functional connection between vital bone and the prosthetic load-bearing surface of an implant. In the same way, primary stability must be obtained for a good lasting clinical result of the implant and to achieve this purpose, the bone density must be evaluated where the dental implant is to be placed. Salah Huwais in 2013 introduced a new osteotomy procedure (Oseodensification) for site preparation without removal and bone preservation. The Osseodensification process produces an autograft layer around the implant with the osteotomy surface, the autologous bone comes into contact through an endosteal device that accelerates osseointegration due to the nucleation of osteoblasts in the instrumented bone adjacent to the implant and has a greater primary stability due to contact between the device and the bone.
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Archilla, Alberto Rodriguez. Oral Cancers Adjacent to Dental Implants: A Descriptive Study. Science Repository, July 2019. http://dx.doi.org/10.31487/j.dobcr.2019.03.04.
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SAINI, RAVINDER, AbdulKhaliq Alshadid, and Lujain Aldosari. Investigation on the application of artificial intelligence in prosthodontics. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, December 2022. http://dx.doi.org/10.37766/inplasy2022.12.0096.
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Review question / Objective: 1. Which artificial intelligence techniques are practiced in dentistry? 2. How AI is improving the diagnosis, clinical decision making, and outcome of dental treatment? 3. What are the current clinical applications and diagnostic performance of AI in the field of prosthodontics? Condition being studied: Procedures for desktop designing and fabrication Computer-aided design (CAD/CAM) in particular have made their way into routine healthcare and laboratory practice.Based on flat imagery, artificial intelligence may also be utilized to forecast the debonding of dental repairs. Dental arches in detachable prosthodontics may be categorized using Convolutional neural networks (CNN). By properly positioning the teeth, machine learning in CAD/CAM software can reestablish healthy inter-maxillary connections. AI may assist with accurate color matching in challenging cosmetic scenarios that include a single central incisor or many front teeth. Intraoral detectors can identify implant placements in implant prosthodontics and instantly input them into CAD software. The design and execution of dental implants could potentially be improved by utilizing AI.
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Cuenin, Michael F., Michael A. Billman, Benjamin S. Hanson, and Val L. Kudryk. The Effects of Estrogen and Progesterone Levels on Osseointegration of Dental Implants. Fort Belvoir, VA: Defense Technical Information Center, October 1996. http://dx.doi.org/10.21236/ada328380.
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Esteban, Ana Isabel Serrano, Alba Belanche Monterde, Ana Belén Lobo Galindo, review and editing, Álvaro Zubizarreta-Macho, and José María Montiel-Company. A Systematic Review and Meta-Analysis of the Dental Claims After Iatrogenic Injuries in Oral Surgery and Dental Implants. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, February 2024. http://dx.doi.org/10.37766/inplasy2024.2.0091.
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Faiz, Nadhirah, Vinay Sivasamy, and Suresh Venugopal. The Effect of Gold Nanoparticle Coated Dental Implants On Osseointegration - A Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2023. http://dx.doi.org/10.37766/inplasy2023.10.0024.
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Saini, Ravinder, Syed Altaf, Sunil Vaddamanu, Vishwanath Gurumurthy, and Masroor Kanji. Comparative Efficacy of Photobiomodulation on Osseointegration in Dental Implants. A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, May 2024. http://dx.doi.org/10.37766/inplasy2024.5.0020.
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Moraschini, Vittorio, Monica Calasans-Maia, Jamil Shibli, and Suelen Sartoretto. Effectiveness of autogenous graft substitutes for gingival phenotype modification on dental implants: a network meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, October 2020. http://dx.doi.org/10.37766/inplasy2020.10.0056.
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Zubizarreta Macho, Álvaro. Effect of the Implantoplasty Techniques on the Fracture Resistance of Dental Implants. Systematic Review and Meta-Analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, June 2024. http://dx.doi.org/10.37766/inplasy2024.6.0018.
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