Relevant bibliographies by topics / Dentistry; implant dentistry; dental implant / Dissertations / Theses

Dissertations / Theses on the topic 'Dentistry; implant dentistry; dental implant'

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Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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1

Hjalmarsson, Lars. "On cobalt-chrome frameworks in implant dentistry /." Göteborg : Department of Dentistry/Dental Materials Science, Institute of Odontology, 2009. http://hdl.handle.net/2077/21179.

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2

O'Sullivan, Dominic. "The effect of implant geometry upon the primary stability of dental implants." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/339010c1-63ee-4eb9-b03c-b3a2b9b89dbf.

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3

Wanat, Thomas Nelson III. "Risk factors for dental implant failure| Smoking, periodontal disease and previously failed implant sites." Thesis, University of Colorado at Denver, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10130885.

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Background: The literature indicates a reduced survival rate for dental implants placed at previously failed sites, smokers, and patients with a history of periodontal disease. The aim of this study is to review the available literature reporting on the success and/or survival of rough surface implants placed at previously failed sites, in smokers, and in periodontally compromised patients. An attempt was made to systematically review the literature and calculate an overall weighted mean survival rate for rough surface implants in each of the above three scenarios.

Methods: An electronic literature search (MEDLINE-PubMed) was performed and references hand-searched for human studies addressing the success/survival of implants placed at previously failed sites, in smokers and in patients with a history of chronic periodontal disease. The overall weighted mean survival rates and 95% confidence interval were then calculated. Results: Six retrospective studies reporting on implants placed at previously failed sites were included with total of 343 second attempts and 31 third attempts at implant placement at failed sites in 330 patients. The weighted mean survival rates for the second and third attempts at implant placement in a previously failed site were calculated to be 88.05% and 74.19%, respectively. A total of 14,395 implants were included in smoking analysis. Of these, 10,403 implants were placed in non-smokers with 250 failures and 3,992 placed in smokers, with 205 failures. The calculated overall weighted mean implant-level survival was 97.67% in non-smokers and 95.03% for in smokers. Lastly, six studies reported on 591 implants placed in periodontally compromised patients with a total of 15 failures and 198 implants placed in periodontally healthy patients with just one failure. The overall weighted mean implant survival rate was calculated to be 97.48% in periodontally compromised patients compared to 99.49% for periodontally healthy patients.

Conclusions: Of the three risk factors evaluated in this review, rough surface implants placed in previously failed sites presents the highest risk for implant failure. Rough surface implant survival declines significantly for each additional attempt at implant placement at a previously failed site, with weighted mean survival rates of 88.05% and 74.19% for the second and third attempts, respectively. Although more favorable than previously used implant designs, smokers continue to experience lower survival rates compared to non-smokers, with overall weighted mean implant survival rates of 95.03% and 97.67%, respectively. A similar finding was found for implants placed in patients with a history of chronic periodontitis. The calculated weighted mean survival rate was 99.49% for periodontally healthy patients compared to 97.48% for periodontally compromised patients.

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4

Isaksson, Anders, and Michael Graham. "RoDent : Robotic Dentistry : Computer aided dental implant positioning system." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1559.

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A study was carried in conjunction with the Orthodontic department at Halmstad General Hospital in Sweden to investigate the possibility of reducing cost and manufacture time of dental implant drill guides.

The current system involves sending a digital image in STL format to the Materialise factory in Belgium where information of the position of dental implants is translated onto a moulded mouthpiece. Drill guides are placed in the mouth piece which is then returned to the surgeon. The mouthpiece complete with drill guides is then placed in the patients mouth and used as a guide for the implant drill holes. The cost of 10000 sek and a turnaround time of 2 weeks gave rise to the need for a faster and cheaper solution.

A new mouthpiece was designed comprising of a solid cube which could be clearly seen on the x-ray. Linearisation of the cube faces is used to find a reference point from which to drive a 5 axis drilling platform. The mouthpiece is placed in the drill platform which is driven by stepper motors which in turn are controlled by a microcontroller. Co-ordinates are entered via a PC interface. The PC software then translates these co-ordinates into motor steps which are sent to the microcontroller. The drill platform then positions the mouthpiece in order to drill guide holes for the dental implants.

The study showed that the machine design gave an acceptable degree of accuracy and repeatability. Further enhancements could be made by automating the detection of the cube using image analysis techniques. The study was also limited by the lack of graphical and geometrical data concerning the position of the implant. For the purpose of this study the co-ordinates for the implants guides is entered by hand.

It was concluded that further software and hardware enhancement would be needed before the application could be developed commercially.

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5

Al-Noaman, Ahmed. "Novel bioactive glass coating for dental implant." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/3342.

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With an increasingly ageing population the requirement for titanium implants will grow. A major challenge is to speed up the rate and strength of osseo-integration. Bioactive glass coated titanium is postulated to improve bone-bonding ability of titanium. However, bioactive glasses have a higher thermal expansion coefficient (TEC) than titanium and are more prone to crystallization during coating process. Therefore, the aim was to develop a bioactive glass coating that matches the TEC of titanium does not crystallize during coating process and forms surface apatite in vivo and in vitro. To achieve these qualities certain compounds (MgO, CaF2 and MgF2 and fluorapatite (FA) crystals) were substituted or added to the glass composition. The glasses were prepared using melt-derived route. The ground glasses were sieved to obtain less than 45 μm diameter glass particles and this powder characterised using X-ray diffraction (XRD), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). Glass rods were cast to measure TEC, glass transition temperature (Tg) and softening temperature (Ts) using Dilatometry. Glass structure was investigated by measuring glass density and oxygen density. The apatite-forming ability of the glass powder was assessed in both Tris-buffer and simulated body fluid (SBF). Filtrates were analysed by inductively coupled plasma spectroscopy (ICP). Titanium disks were coated with bioactive glass/composites using the enamelling technique. Coated samples were characterised by (XRD, FTIR) and scanning electron microscopy (SEM-EDS). Bioactivity of coating samples was studied after 1 month immersion in Tris-buffer solution or SBF. Biocompatibility assays of glass coatings were assessed using UMR106 osteoblast-like cells and a fibroblast cell line. The results generated some interesting findings – firstly it is possible to produce glasses with comparable TEC of titanium and wide sintering windows. Although most preparations were more bioactive compared with those of Saiz and Tomsia–not all preparations were bioactive. Some coatings were biocompatible with fibroblasts, but not osteoblast-like cells. Whilst some glasses might not be suitable for a coating, they may have use as structural scaffolds for skeletal reconstruction.
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6

Alzoubi, Fawaz. "Pre-doctoral implant dentistry education: Trends, issues, and perspectives." Scholarly Commons, 2015. https://scholarlycommons.pacific.edu/uop_etds/46.

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Implant dentistry has emerged as a very reliable and predictable option for replacing missing teeth. Implant education at the pre-doctoral level has been implemented in most parts of the world and is currently perceived as a fundamental discipline in dental education. Dental graduates today are expected to have knowledge and possess skills at the competence level in order to provide care for the growing number of patients seeking this treatment option, which may be the optimal option for the majority of their cases. However, very little is known about current trends, issues, and perspectives of implant dentistry education. This study builds a knowledge base about implant dentistry education in pre-doctoral dental education programs. It begins with an overview of the current state of implant dentistry education described in Chapter 1. Chapter 2 evaluates faculty perception in Kuwait University Faculty of Dentistry regarding case-based-learning, a pedagogy that has been recommended by multiple dental education institutions as the context within which pre-doctoral implant dentistry education should be taught. Chapter 3 presents an example of how case-based-learning pedagogy might be implemented in the form of a case report. Chapter 4 creates the link between faculty perception and student outcomes and presents an evaluation of students' competence level regarding pre-doctoral implant education. Finally, Chapter 5 provides a summary and synthesis of the three articles with a focus on placing this research within the larger body of scholarship on implant education and on identifying implications for policy, future scholarship, and practice.
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7

Abuhammoud, Salahaldeen Mohammad. "Knowledge and practice of implant dentistry among University of Iowa College of Dentistry alumni." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/3235.

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Objective: The objective of this study was to measure and assess the implant education received by graduates from the University of Iowa College of Dentistry and Dental Clinics. This study measured the self-reported competency levels of dental practitioners with regards to providing and maintaining dental implants as treatment modalities to their patients. The study assessed dental graduates’ willingness to practice and perform dental implant procedures, including both surgical and prosthetic treatments. Additionally, the study identifies challenges that face practicing dentists treating patients with dental implants and identifies the preferred way practitioners seek future training after completing dental school. Methods: A 36-item electronic survey was created and distributed to 737 dentists who graduated from the University of Iowa College of Dentistry and Dental Clinics. Dentists’ demographics, practice characteristics, and detailed self-reported competency in implant dentistry were collected. Statistical analysis of the responses consisted of descriptive statistics and bivariate analysis, and nonparametric Wilcoxon rank-sum test and Spearman’s rank correlation test along with a chi-square test were used for detecting the differences, correlations and associations under different conditions. Results: 154 dentists completed the survey (21% response rate), while only 143 subjects who fulfilled the inclusion criteria were included for the statistical analysis. The survey consisted mostly of males (56.6%). The mean age of respondents was 34.2 years old with a mean practice time of 6.2 years. Of the responding dentists, 21.7% completed a postgraduate training program and 51% of the respondents were in group practice. 66% of the respondents practice in the Midwest region of the US and 71.3% of the respondents took continuing educational courses in implant dentistry and the mean cumulative hours of CE courses in implant dentistry was 33.8 hours. The mean average of implant restorations provided per year was 11.7 and the mean average of implant placements per year was 19.6. There was a significant correlation between cumulative hours of Continuing Education courses and number of implant units on average placed or restored. 64.3% of the dentists are not satisfied with the implant education given at the dental student level. 95.8% of the dentists reported that dental school training is not adequate to surgically place dental implants in their practice. Only 32.4% reported that dental school training was not adequate to restore dental implants in their practice. The preferred way to receive additional training about dental implants is short-term CE courses and workshop courses conducted by implant companies. 23.6% of the dentists reported they are competent at surgically placing dental implants in their practice. 79.1% reported they are competent at restoring dental implants in the dental office. Only 28.4% reported that they feel dental implants are more difficult than other dental treatments. Conclusions: Graduate dentists from the University of Iowa are not expected to be competent in all components of implant dentistry without further postgraduate training. Respondents stated that their dental school training in surgical placement of implants was inadequate. To build upon their dental school training, the two main preferred education pathways as reported by respondents were short-term continuing education courses and workshops courses conducted by implant companies. Within the parameters of this study, we can conclude the following: 1.Age, GPA, number of CE hours in dental implant therapy, specialty status, and time since graduation did not influence undergraduate education satisfaction in dental implant therapy. 2.There is a positive correlation between the number of CE course hours and the number of implant units restored or placed by general dentists. 3.Male dentists, those who practice in group practice settings, and those who have graduated six or more years ago reported a greater number of CE course hours in dental implant therapy. 4.Those who graduated with GPAs less than or equal to 3.4, general dentists, and those who enrolled in a high number of CE courses were more confident in restoring dental implants. 5.Those who graduated with a GPA greater than or equal to 3.5, specialist dentists, and those who enrolled in a high number of CE courses were more confident in surgically placing dental implants. 6.Males, general dentists, those who practice in a group practice setting, and those who graduated six years or more ago restored more implants on average per year. 7.Males, specialist dentists, those who practice outside the Midwest US, and those who graduated six years or more ago surgically place more implants on average per year.
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8

Harrison, Kevin Charles. "Implant Placement in Conjunction with the Ridge Split Technique." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306864728.

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9

Narendrakumar, Krunal. "Developing methods to prevent or treat microbial colonisation of titanium dental implant surfaces." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5677/.

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Titanium (Ti) dental implants are a successful treatment modality to replace missing teeth. Success is traditionally defined as the retention of the Ti dental implant but fails to account for peri-implant inflammatory diseases such as peri-implant mucositis and peri-implantitis. Peri-implant diseases are caused by the formation of pathogenic bacteria biofilms on the implant surface and disease progression can lead to dysfunctional and unaesthetic outcomes. There is no universally accepted treatment or management protocol for peri-implant disease. The objectives were to develop methods to prevent bacterial adhesion to Ti implant surfaces or treat existing biofilms. The relationship between bacterial adhesion of common early coloniser bacteria and topological features on dental implant surfaces was studied. Reproducible model systems were identified to be used in studies of biofilm formation and disruption. Early bacterial adhesion was investigated on engineered Ti surfaces created using Scanning-Laser-Melting or on Ti nanotubule surfaces. Photoactivation of Ti oxide films was investigated on thermally or anodically oxidised Ti and demonstrated the potential to pre-treat implant surfaces to reduce bacterial attachment. Finally chemical disinfection of Ti surfaces with a novel Eucalyptus Oil (EO) based formulation was demonstrated to increase the permeation of bactericidal agents into immature biofilms formed on Ti surfaces.
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10

AL-Meraikhi, Hadi Nasser. "In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449063197.

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11

Sitbon, Yves Alain Dietrich. "Epithelial cells attachment on five different dental implant abutment surface candidates." Thesis, University of Iowa, 2009. https://ir.uiowa.edu/etd/266.

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Objectives: the hypothesis of this study was that different abutment substrates would not affect epithelial cell attachment and differentiation. Methods: 15 discs for each of 5 different materials (4 types of titanium and 1 type of zirconium) were flooded with a media containing human adenoid epithelial cells (hTERT). Cells were allowed to attach on the discs for 2 hours. The media was then collected, and remaining suspended cells counted, to determine number of attached cells. Surfaces were then flooded with fresh media, collected 24 hours later. Levels of 6 different pro-inflammatory cytokines contained in the media were measured for each disc, using a Luminex 100 IS system. Then, part of the discs was used for SEM observation of cell morphology. Another part of the discs was used for immuno-fluorescent microscopy, to observe the organization of the actin cytoskeleton, using phalloidin conjugated to a fluorophore to label the actin. The remaining discs were used to analyse alpha6-beta4 Integrin expression, using gel electrophoresis after isolation of mRNA and reverse PCR. Results: Number of attached cells was not statistically different for the 5 types of material. For the 5 materials, levels of cytokines IL-6, 8, 12 and TNF-alpha were similar and IL-1 and 10 were not produced in amounts large enough to be detected. Again, alpha6-beta4 Integrin expression was similar for the different surfaces. Actin Cytoskeleton organization was alike for the titanium surfaces, but cells seemed to be less spread on zirconium. SEM showed comparable cell morphology for the titanium surfaces, whereas no cell could be observed on zirconium. Conclusions: quantitatively, cell attachment and expression of alpha6-beta4 Integrin, IL-6, 8, 12 and TNF-alpha does not seem to be affected by the different surfaces. Nevertheless, attachment might be of lesser quality for zirconium.
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12

Fakhravar, Behnam. "The Effect of Probing And Scaling Instrumentation On Implant Restorative Abutments." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/148112.

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Oral Biology
M.S.
Introduction: Dental implant abutments can be exposed to a variety of oral prophylaxis procedures. Instrumentation of restored dental implants could subject the apical collar of the implant restorative abutment to surface scratching. Scratched surfaces may pose a threat to the integrity of the soft-tissue seal around the apical portion of the abutment which eventually may compromise the alveolar support of the implant. The aim of this study was to objectively measure surface roughness on the apical collar of metal implant abutments induced by probing and scaling instruments. Materials and Methods: 14 standard transmucosal 3 in 1, 4.5 mm diameter abutments made of titanium alloy (BioHorizons, Atlanta, GA) and 4 instruments, UNC-15 metal probe, Periowise plastic probe, McCall SM 17/18 metal scaler and universal plastic scaler were used to conduct the study. 4 abutments were used for non-treated measures and 10 abutments were used for instrumentation measures. All abutments were divided into four sections. Abutments used for instrumentation were treated with one of the four indicated instruments, one instrument per each section. Surface roughness of untreated and treated surfaces was assessed using a contact profilometer. Analysis of variance (ANOVA) was used to compare surface roughness between untreated and treated surfaces. Results: ANOVA showed significant differences in surface roughness between the treated and untreated surfaces (p< 0.0001). Add hoc analysis using Tukey-Kramer HSD test showed no statistical differences between untreated measures and metal probe measures (p>0.05). On the other hand, statistical differences were noted between untreated measures with plastic probe measures (p= 0.05), plastic scaler measures (p=0.05) and metal scaler measures (p=0.05). The metal scaler measures were higher than plastic probe measures (p=0.05), and plastic scaler measures (p=0.05). Conclusions: Probing around implant abutments with a metal probe seems to have no relevant effect on abutment surfaces. In contrast, instrumentation with scalers (both metal and plastic) and plastic probe may cause adverse surface changes. It is not known if these changes have clinical relevance.
Temple University--Theses
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13

Scherer, Michael David. "Comparison of Retention and Stability of Implant-Retained Overdentures Based Upon Implant Location, Number, and Distribution." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1336664206.

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14

Youssef, Sarah Jane. "Implant Maintenance Curriculum Among U.S. Dental Hygiene Programs." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586814568072554.

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15

Robitaille, Nicolas. "METAGENOMIC ANALYSIS OF THE DEVELOPING PERI-IMPLANT SULCUS." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1434667746.

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16

Howell, Kent Jon. "Accuracy of the Biomet 3i Encode® Robocast™ Technology Versus Conventional Implant Impression Techniques." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306772544.

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17

Gil-Escalante, Mariana. "Comparison of Azithromycin and Amoxicillin for Prophylaxis at Dental Implant Placement: A Randomized Pilot Study of Bioavailability and Anti-inflammatory Effects." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1371125943.

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18

Mizumoto, Ryan M. "The accuracy of different digital impression techniques and scan bodies for complete-arch implant-supported reconstructions." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1530005688900126.

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19

Johnston, Geoffrey R. "Comparison of Vertical Misfit Between Pattern Resin and Welded Titanium Used to Fabricate Complete-Arch Implant Verification Jigs." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1499779684903305.

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20

Cheng, Xiaoli. "A 3D approach in quantification of the alveolar bone changes after dental implant placement based on CBCT images." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24561.

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This retrospective clinical study aimed: (1) to establish and validate a reproducible geometrical measurement strategy in quantifying peri-implant alveolar bone changes based on CBCT images taken before and one year after implantation; (2) to quantify and compare the bone changes of Type 1 and Type 4 implant placement in the patient cohort that requested implant placement at premolar and molar sites; (3) to analyse the bone changes in relation to the two implant protocols in aspects of buccal and lingual, maxilla and mandible, within the cohort and combined cohorts. 3D imaging analysis in this study had used a software package - OnDemand3D. The evaluation of the measurement strategy was based on a simulation model which was made of human dry skull with and without a standard implant (Straumann Standard Plus, Ø3.3 mm diameter, L12 mm) to simulate before and after the implant placement. The recruited cases were 69 (44 Type 1 cases and 25 Type 4 cases); all data sets were provided by Shanghai 9th people's hospital, China. Each case had two CBCT data sets at before and one year after implant placement. With 69 cases, bone grafting was applied to all Type 1 cases, and the flap surgery was applied to Type 1 cases when buccal bone recession greater than 3 mm. The measurements were made in bone height (HL) and bone thickness (L0O0, L1O1, L2O2, L3O) at lingual side, while the same at buccal side (HB, B0O0, B1O1, B2O2, B3O3). The four sections of bone thickness were at 0, 1 mm, 4 mm and 7 mm from the top of the implant. Additionally, six special cases were reported, as they provided extra information. They were two spilt-mouth control cases, three 2-year follow-up cases and one 3-year follow-up case. The evaluation of the measurement strategy showed the error of the measurement strategy was -0.06 mm and the measurement uncertainty was ±0.05 mm. The main measurement outcomes from the clinical cases were as follows: (1) at buccal side, the mean value of bone changes in height was a positive value of +0.18±1.64 mm for Type 1, which was significantly more than +0.01±0.86 mm for Type 4 (p < 0.05). However the standard deviation over the 44 and 25 patient cohorts were as large as 1.64 mm and 0.86 mm; (2) at buccal side, the bone changes in thickness showed significantly more loss at B0O0 (p < 0.01) and B1O1 (p < 0.05) sections in Type 1 (-0.38±1.49 mm and -0.25±1.15 mm) compared with Type 4 (-0.19±0.34 mm and -0.16±0.76 mm); (3) in Type 1 cases, the bone thickness at buccal side showed significantly more absorption at L1O1B1 (p < 0.05), L2O2B2 (p < 0.01), L3O3B3 (p < 0.01) section (-0.25±1.15 mm, -0.19±0.99 mm, -0.12±0.57 mm) compared to lingual side (-0.13±0.85 mm, -0.16±0.28 mm, -0.05±0.28 mm); and the bone height (+0.18±1.64 mm) increased significantly more at buccal side than lingual side (-0.25±0.79 mm) with bone augmentation procedure (p < 0.01). However, within Type 4 cases, no significant difference in bone changes between buccal and lingual sides could be found. In conclusion, the measurement strategy established in this study was reproducible and provided valid quantifiable data of bone changes in relation to implant placement based on 3D CBCT images. The data analysis from these two patient cohorts suggested that Type 1 implant placement protocol could re-build the bone height at buccal side better than Type 4.
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Taketa, Rofaida, and Ivona Kovacevic. "A Retrospective Evaluation of Surgical Treatment of Peri-implantitis." Thesis, Malmö universitet, Odontologiska fakulteten (OD), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-42461.

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Aim: To investigate retrospectively the outcome of surgical peri-implantitis treatment taking potentially relevant parameters into account. Material and method: Patients being treated for peri-implantitis during 2013-2019 by a single specialist with sufficient radiographic and clinical documentation and at least a nine-month follow-up were considered herein. Patient-, prosthodontic-, and implant-related data were collected from the journals and available radiographs at baseline and follow-ups. Surgical procedures were divided into open flap debridement (OFD), resective, regenerative and combined treatments. Treatment outcome was defined as: good (PPD≤5mm+no BoP); acceptable (PPD>5mm without BoP or BoP+PPD≤5mm); bad (PPD>5mm+BoP and/or suppuration); and failure (explantation or re-operation). Descriptive statistics, chi-square or Fisher’s exact test were performed to assess potential predictors for the combined outcomes good and acceptable, coined as “successful”, and bad and failure, coined as “unsuccessful”. Results: Thirty-seven patients and 69 implants with a follow-up of 9 to 63 months fulfilled the inclusion criteria. Overall, 71% of the treated implants showed a good outcome and 13% an acceptable outcome, i.e., in 84% of the cases a successful outcome was achieved. Regenerative treatment had the highest success rate (87%) followed by resective (84%), OFD (83%) and combined treatment (83%). One of the predictors (i.e., smoking) affected the successful outcome negatively with >10%. However, statistical analysis failed to prove significance. Conclusion: Based on this retrospective analysis of a relatively limited number of implants, surgical treatment of peri-implantitis was successful in 84% of the cases. For defining risk factors affecting the treatment outcome a larger sample size is required. The results were of no statical significance.
Syfte: Retrospektivt undersöka resultatet av kirurgisk peri-implantitbehandling med hänsyn till potentiellt relevanta parametrar. Material och metod: Alla patienter som kirurgiskt behandlades för peri-implantit under tidsperioden 2013-2019 av en enda specialist med minst nio månaders uppföljning beaktades här. Patient-, protes- och implantatrelaterade data samlades in retrospektivt från journaler och tillgängliga röntgenbilder pre- och postoperativt. Kirurgiska ingrepp delades in i open flap debridement (OFD), resektiv, regenerativ och kombinerad behandling. Behandlingsresultatet definierades som: good (PPD≤5mm+ingen BoP); acceptable (PPD>5mm utan BoP, eller BoP+PPD≤5mm); bad (PPD>5mm+BoP och/eller suppuration); och failure (explantering eller re-operation). Beskrivande statistik, chi-square eller Fisher’s exact test utfördes för att bedöma potentiella prediktorers påverkan på resultatet. För ”lyckat” kombinerades resultaten good och acceptable, medan för ”misslyckat” kombinerades resultaten bad och failure. Resultat: Trettiosju patienter och 69 implantat med en uppföljning på 9 till 63 månader uppfyllde inklusionskriterierna. Sammantaget visade 71% av de behandlade implantaten ett bra resultat och ytterligare 13% ett acceptabelt resultat, dvs. i 84% av fallen uppnåddes ett lyckat resultat. Regenerativ behandling hade den bästa lyckandefrekvensen (87%) följt av resektiv (84%), OFD (83%) och kombinerad behandling (83%). En av prediktorerna, mer specifikt rökning, påverkade lyckandefrekvensen negativt med >10%. Statistisk analys misslyckades dock med att bevisa statistisk signifikans. Slutsats: Baserat på denna retrospektiva analys av ett relativt begränsat antal implantat lyckades kirurgisk behandling av peri-implantit i 84% av fallen. För att definiera riskfaktorer som påverkar behandlingsresultatet krävs en större provstorlek. Resultaten visade ingen statistisk signifikans.
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22

Kandaswamy, Eswar. "Biologic Mediators And Titanium Release Associated With Treatment Of Peri-Implant Diseases - A 6 Months Follow-Up Study." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595432512854474.

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23

Verma, Rajiv, and n/a. "Clinical outcomes of dental implant treatment provided at the School of Dentistry, University of Otago from 1989 to 2005." University of Otago. School of Dentistry, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081219.145402.

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Objective: The aim of the study was to evaluate the clinical outcomes of oral implant treatment provided at the School of Dentistry, University of Otago from 1989 to 2005. Methods: Oral implant patients (n=320) with 586 implants were identified and invited to attend for a clinical examination. Implant demographics of all the patients were extracted from the files. Implant demographics of the examined and unexamined patients were compared to assess if the examined patients were representative of the total group. One hundred and three patients with 214 implants agreed to attend for an examination. In the clinical examination full mouth plaque scores, probing depths, bleeding on probing and suppuration were measured. In addition, around implants recession and width of keratinized gingiva were also recorded. For the radiographic examination, baseline radiographs and radiographs taken at the time of examination were digitized and compared to measure the amount of bone lost or gained around implants using NIH Image J software. Results: There were equal numbers of males and females with a mean age of 46.3 � 15 years at the time of implant placement. The smoking history at the time of examination was recorded, 56% of the patients were non-smokers, 37% former smokers, and 7% were current smokers. More than half of the implants (56%) were placed in the anterior region. Based on the type of implant system, 79% were Branemark implants, 10% Straumann, 6% Southern implants and 4% were unknown. Most of the patients (64%) had implant-supported crowns, 19% had fixed denture prostheses, and 17% had implant-supported overdentures. The overall implant survival rate was 97.7% with five implants lost (2.3%) and 8 implants treated for peri-implantitis (3.8%). The mean PD around implants was 2.3mm (SD 0.6mm), mean recession was 0.5mm (SD 0.8mm) and mean attachment level of 2.8mm (SD 0.9mm). Probing depths [greater than or equal to] 4mm with BOP were recorded around implants in 8.9% of patients. The mean full mouth plaque score was 30% while mean plaque score around implants was 15.9%. The average bone loss around implants was 0.3mm (SD 0.8). Maximum bone loss observed was 2.9 mm. Conclusion: The prevalence of peri-implant inflammation and implant survival rates in this group of patients appeared comparable to that reported in the literature. The prevalence of peri-implant lesions was low in the group of patients examined.
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Johnson, Trenton. "Effect of guided bone regeneration with rhBMP-2 on bone quality surrounding dental implants." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152147382891412.

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Salaita, Louai Ghaleb. "Strain analysis and fracture strength of different abutments for cement-retained crowns on an internal hexagon implant." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1404820351.

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Salles, Angelo Emilio Barroso de. "Analise fotoelastica da distribuição de tensões em dois sistemas de proteses mandibulares sobre implantes : barra distal e solda a laser." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288262.

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Orientador: Mauro Antonio de Arruda Nobilo
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-12T16:14:35Z (GMT). No. of bitstreams: 1 Salles_AngeloEmilioBarrosode_M.pdf: 10746117 bytes, checksum: 7a6d08147fb33c8d235cc7df5f8be032 (MD5) Previous issue date: 2008
Resumo: Este estudo avaliou por meio de análise fotoelástica, a distribuição in vitro das tensões geradas na interface "osso/implante" em próteses mandibulares, tipo protocolo, comparando duas técnicas de confecção: Solda a laser e Barra Distal (Neodent, Curitiba - PR) onde não se utiliza infra-estrutura metálica. Foram confeccionadas duas próteses com design similares (uma para cada técnica), sobre uma matriz metálica simulando um arco mandibular edêntulo, onde foram instaladas cinco réplicas de implantes de corpo único (GT- Neodent, Curitiba - PR). A partir de um molde de silicone de duplicação (Silibor - Clássico Artigos Odontológicos Ltda.) foi confeccionado um modelo em resina fotoelástica (Araldite GY279BR - Araltec Produtos Químicos Ltda. Guarulhos - SP) com cinco implantes GT (Neodent, Curitiba - PR) incorporados. Após a instalação de cada prótese sobre o modelo fotoelástico, utilizando 10 N/cm para aperto dos parafusos, foi realizada análise fotoelástica. Em seguida, foi aplicada carga oclusal de 100 N em toda extensão de cada prótese, com auxílio de uma placa metálica posicionada sobre a face oclusal dos dentes, e então realizada nova análise das tensões. Estas análises foram executadas com o auxílio de um polariscópio circular acoplado a uma máquina fotográfica digital (H1 - Sony, Japão), que permitiu a visualização das franjas e registrou através de fotografias digitais o comportamento das mesmas ao redor dos implantes no modelo fotoelástico. De acordo com os resultados, concluiu-se que a técnica utilizando Barra Distal distribuiu melhor, e transmitiu com menos intensidade, após o aperto dos parafusos, as tensões geradas na interface "osso/implantes" do que a técnica utilizando solda a laser. No entanto, ocorreu o inverso após o carregamento oclusal.
Abstract: The aim of this study was to evaluate through photoelastic analysis, the in vitro distribution of the generated tensions in the "bone/ implant" interface in mandibular prostheses, protocol type, comparing two different working techniques: the idealized by Branemark and Distal Bar (Neodent, Curitiba - PR) where framework is not used. Two similar prostheses were made (one for each technique), on a metal matrix simulating an edentulous mandible, where five replications of single body implant were installed (GT-Neodent, Curitiba - PR). From a silicone mold for duplication (Silibor - Classico Artigos Odontológicos Ltda.), a model in photoelastic resin was created (Araldite GY279BR - Araltec Produtos Quimicos Ltda., Guarulhos - SP) with five GT implants (Neodent, Curitiba - PR) embedded. After the installation of each prosthesis on the photoelastic model, using 10 N/cm for tightening the screws, a photoelastic analysis was performed. Then a 100 N occlusion load was applied throughout each prosthesis extension with the help of a metal plate positioned on the occlusal face of the teeth, and then a new analysis of the tensions was conducted. These analyses were performed with the help of a circular polariscope attached to a digital camera (H1 - Sony, Japan), which allowed the visualization of the fringes and recorded by digital photos the behaviour of the implants. According to the results, it was concluded that the Distal Bar technique distributed better, and transmitted with less intensity, after the tightening of the screws, the generated tensions to the system "bone/implants" than the laser welding. However, it happened the opposite after the occlusal load.
Mestrado
Protese Dental
Mestre em Clínica Odontológica
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27

Alsaery, Amani Saleh. "Strain and load-to-fracture comparison of CAD-CAM dental implant crown materials under loading." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483730173077362.

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28

Neergaard-Richardt, Tobias, and Teemu Väkiparta. "Immediate Loaded Implants Placed in Fresh Extraction Sockets - Effect on Marginal Bone." Thesis, Umeå universitet, Institutionen för odontologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-142304.

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This study investigated the immediate implant placement in the maxillary aesthetic zone without flap elevation or enhancement of the hard tissue component with filler or membrane material. The aim of this paper is to study treatment outcome for immediate implant placement in fresh extraction socket in the maxillary anterior region regarding marginal bone level. This retrospective cross-sectional study includes data on 41 patients, total of 54 implants (n = 54), treated for immediate placed implants without flap elevation. 30 patients, a total of 33 single immediate implants were placed in the anterior maxilla and immediately restored with a temporary crown. In another 11 patients, 21 implants were placed in fresh extraction sockets and temporalized with a provisional bridge engaging immediate implants and in some cases in combination with delayed implants. No implants were lost during the follow-up period, mean radiographic follow up was 32 months. Analysis of the radiographs presented mean bone level of all sites 1.47 mm (SD 1.63) immediately after the installation and 0.85 mm (SD 0.75) at the follow up evaluation, resulting in a mean bone gain of 0.62 mm. With careful patient selection immediate placement of implant in fresh extraction socket can be an attractive treatment modality in maxilla anterior region.
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29

Ferreira, Jonathan. "Desenvolvimento de plataforma elíptica osseointegrável para implante dentário, guias de perfuração e técnica cirúrgica de implantação - estudo em fêmures de cães." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-17042009-152113/.

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O objetivo deste estudo foi desenvolver um implante dentário para utilização em cães, com formato semelhante aos dentes bi-radiculares destes animais e a técnica cirúrgica para sua implantação, com características que permitam a osseointegração. O implante é composto por três peças, dois implantes cônicos rosqueados unidos à plataforma elíptica cônica por parafusos e implantados abaixo do nível ósseo. Foram utilizados 20 fêmures de cães para o desenvolvimento deste projeto e os implantes foram colocados na região epifisária destes ossos. A perfuração foi guiada através de três tipos de guias cirúrgicas confeccionadas em alumínio com dimensões compatíveis a dos implantes e das plataformas. A osteotomia foi avaliada com mensurações diretas e a adaptação do implante foi avaliada radiograficamente. O implante desenvolvido é bastante semelhante à porção radicular dos dentes bi-radiculares dos cães. A técnica cirúrgica de perfuração e osteotomia foi eficiente e a avaliação radiográfica revelou boa adaptação entre as peças e paralelismo entre os implantes rosqueados. Essas conclusões permitem sugerir que, seguindo esta metodologia, com a plataforma confeccionada em liga de titânio, este tipo de implante deve se osteointegrar ao osso adjacente.
The aim of this study was to develop a dental implant for use in dogs with similar format to the biradicular teeth of these animals and surgical technique for its implantation, with features that allow the osseointegration. The implant is composed of three parts, two conic threaded implants united to a conic elliptical platform by screws and implanted below the bone level. 20 femurs of dogs were used for the development of this project and the implants were placed in the epiphyseal region of the bones. The drilling was guided by three types of surgical guides made of aluminum consistent with dimensions of the implants and platforms. The osteotomy was evaluated with direct measurements and the adaptation of the implant was evaluated radiographically. The implant developed is very similar to the root portion of the biradicular teeth of dogs, the surgical technique of drilling and osteotomy have been efficient and radiographic evaluation showed good adaptation between the parts and parallelism between the threaded implants. These findings suggest that by following this approach, with the platform constructed in titanium, this type of implant should be osseointegrated to the adjacent bone.
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Shah, Karnik. "Retrieval of Cemented Monolithic Zirconia Single unit Implant Restoration Using Er:YSGG Laser: A Novel Non Sectionalized Separation Technique." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469211037.

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Kofina, Vrisiis. "Blood Perfusion and Early Wound Healing Following Implant Placement: A Comparison Between Grafted and Non-Grafted Sites." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1529679829743409.

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Rathi, Nakul H. "Comparing the Accuracy of Intra-Oral Scanners for Implant Level Impressions Using Different Scanable Abutments." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407200647.

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33

Isik, Alexandra, and Tai Truong. "Efficacy of air-polishing in disinfecting implant surfaces. A laboratory study simulating a non-surgical approach." Thesis, Malmö universitet, Odontologiska fakulteten (OD), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-42547.

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Aim: To evaluate different parameters potentially affecting the efficacy of air-polishing devices in disinfecting implant surfaces in a non-surgical treatment approach of peri-implantitis lesions. Material and method: Altogether, 56 turned and 56 moderately rough implants were coated with a simulated biofilm. The implants were mounted in customized resin models simulating peri-implant 30° bone-defects, 3- and 5-mm deep; soft tissues were simulated with ballistic gelatin. Each implant was cleaned for 30 or 90 seconds in total (6 sites pr. implant; 5 or 15 seconds pr. site) with one of two different air-polishing devices (W&H and EMS). Implants were photographed in three different angulations and the amount of residual biofilm on the implant surface was measured digitally. Beta-regression models were used to assess the outcome. Results: Implant surface, treatment time and air-polishing device significantly affected the amount of residual biofilm. Turned implant surface, longer treatment time, and using the EMS device resulted in significantly less residual biofilm. In the most apical part of the defect, both air-polishing devices performed similarly, however, this was also the area with most biofilm left compared to more coronal aspects. Defect depth had no significant effect.  Conclusion: Superior biofilm removal is achieved at implants with turned surface, and when applying longer treatment time. At the deepest aspect of the defect, implant decontamination is compromised.
Syfte: Syftet med denna laborativa studie är att utvärdera olika parametrar som potentiellt kan påverka effekten av air-polishing maskiner vid icke-kirurgisk rengöring av implantat för behandling av peri-implantit. Material och metod: Sammanlagt, 56 turned (maskin bearbetade) och 56 moderately rough (måttlig ytråhet) implantat var belagda med en biofilmimitation. Implantaten var placerade i en specialgjord resin-modell som simulerar en 30° bendefektmodell med 3- respektive 5 mm defektdjup; mjukvävnaden simulerades med ballistiskt gelatin. Varje implantat rengjordes i totalt 30 eller 90 sekunder (6 sidor per implantat; 5 eller 15 sekunder per sida) med en av två air-polishing maskiner (W&H och EMS). Implantaten fotograferades sedan ur tre olika vinklar för att digitalt bedöma kvarstående biofilm. Implantatyta, tillverkare, defektdjup och behandlingstid analyserades som prediktionsvariabler för kvarstående biofilm (%). Beta-regressionsanalys användes för att bedöma resultatet. Resultat: Implantat-yta, tillverkare och behandlingstid påverkade mängden kvarvarande biofilmsimulation signifikant. Maskinbearbetade implantatytor, en längre behandlingstid, användande av EMS maskinen, resulterade alla i signifikant mindre kvarvarande biofilm. De två tillverkarna presterade endast lika i de mest apikala delarna av defekten, men detta var också det område med mest kvarvarande biofilm jämfört med mer koronala aspekter. Defekt djup hade ingen signifikant effekt på resultatet. Slutsats: Man kan förvänta sig bättre borttagning av biofilm när man behandlar maskinbearbetade implantatytor samt när man använder en längre behandlingstid.Vid den djupaste aspekten av defekten, äventyras dekontaminering av implantat
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34

Farré, Berga Oriol. "Disseny, anàlisi i avaluació per elements finits i estudis mecànics d'una nova cabota de cargol per a retenció de pròtesis dentals cargolades a implants i la seva respectiva eina." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/405390.

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L'objectiu principal d'aquest estudi va ser dissenyar la geometria òptima d'una nova eina; crear les ranures del cap esfèric d’un nou cargol; i demostrar la seva resistència a un parell de fins a 40 N·cm a una angulació de 0, 15 i 30 graus utilitzant l'anàlisi d'elements finits no lineals. Un objectiu secundari va ser crear un sistema infal·lible i fàcilment recognoscible. Els dissenys del cargol de cap esfèric i la geometria de l’eina, que funcionen a qualsevol angulació de 0 a 30°, es van generar utilitzant el programa Pro-ENGINEER Wildfire 5.0. Les anàlisis estructurals estàtiques entre els cossos en contacte es van realitzar a diferents angles de 0°, 15° i 30° a un parell de 20 N·cm i 40 N·cm, utilitzant la simulació d'elements finits no lineals mitjançant l’ANSYS 12.0. La tensió màxima del cap del cargol i l’eina va ser similar a 20 N·cm i 40 N·cm. Encara que es van trobar deformacions majors a 40 N·cm, aquestes van ser petites i no van afectar el rendiment de l’enllaç. A més, el valor del parell de ruptura de l’enllaç amb rosca M2 va ser de 55 N·cm per a 0° i 30° i 47,5 N·cm per a 15°. L'anàlisi d'elements finits va mostrar que aquest nou cargol de cap esfèric i la seva respectiva eina són una bona solució per utilitzar en pròtesis amb orificis angulats cargolades a implants. Finalment, es van desenvolupar les proves mecàniques necessàries per adquirir dades més fiables i comprendre millor el seu comportament sota condicions de fatiga per tal de determinar la resistència a la torsió del conjunt cargol i eina Ball Head System (BHS) a 0°, 20° i 30° d’angulació; per comparar el conjunt BHS amb el sistema de eina hexagonal de 1,30 mm (HexS) a 20°; i analitzar la condició del conjunt BHS després de 10 i 30 iteracions amb un parell de 30 N·cm a una angulació de 30°. El conjunt BHS permet un parell de fins a 54 N·cm. En les mateixes condicions, el conjunt BHS va mostrar més resistència de parell que el conjunt d’HexS. Aquest últim es va haver de descargolar amb una eina de pressió de taller. Rellevància clínica: Aquest nou conjunt cargol i eina BHS es pot utilitzar per a orificis angulats de fins a 30º, és visualment fàcil d’identificar i fins i tot en presència de deformació del cap del cargol, la majoria es poden descargolar amb la seva pròpia eina.
The primary objective of this study was to design the optimal geometry of a novel screwdriver; create the grooves on a ball head screw; and demonstrate its resistance to a torque of up to 40 N·cm at an angulation of 0, 15 and 30 degrees by using nonlinear finite element analysis (FEA). A secondary objective was to create a foolproof and easily recognizable system. The grooved ball head screw and geometry of the screwdriver, functioning from an angulation of 0° to 30°, was generated using Pro-ENGINEER Wildfire 5.0 software. Static structural analyses between bodies in contact were performed at different angles of 0°, 15° and 30° at a torque of 20 N·cm and 40 N·cm, using nonlinear finite element simulation by means of ANSYS 12.0. The maximum stress supported by the ball head screw and screwdriver was similar at 20 N·cm and 40 N·cm. Although greater deformations were found at 40 N·cm, these were small and might not affect the performance of the system. Besides, the rupture torque value for the M2 connection was 55 N·cm for 0° and 30°, and 47.5 N·cm for 15°. Finite element analysis showed this novel ball head screw and screwdriver system to be a good solution for angled screw channels in implant-supported prostheses. Finally, the needed mechanical tests to acquire more reliable data and to better understand its behaviour under fatigue conditions were developed in order to determine the torsion resistance of the Ball Head System (BHS) screw and screwdriver set at 0°, 20° and 30° angulations; to compare the BHS set with the 1.30 mm hexagonal screwdriver system (HexS) at 20°; and analyse the condition of the BHS after 10 and 30 iterations with 30 N·cm torque at 30° angulation. The BHS allows tightening at a torque of up to 54 N·cm. Under the same conditions, BHS showed more torque resistance than HexS, which could not be removed. Clinical relevance: This new system can be used for angled screw channels, and even in presence of deformation, most can be removed with their own screwdriver.
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35

Nemes, Jordan. "Fear of dental implants among edentulous patients." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101732.

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Despite implant-supported overdentures' advantages over conventional dentures, edentulous patients often refuse dental implants for reasons that may be related to fear. Objective. The purpose of this study was to uncover and explain the various forms and sources of dental implant-related fear among edentulous patients. Methods. A convenient sample of 8 edentulous/semi-edentulous participants was used. Participants were recruited from a current study at McGill University's Faculty of Dentistry, posting of recruitment flyers, and local homes and community centers for seniors. One-on-one interviews were conducted in Montreal from March 2005 to February 2006, transcribed verbatim, and coded into multiple theme-based sections. Results. Three categories of implant-related fear were identified: (1) fear of dental implant surgery; (2) fear of the recovery period; and (3) miscellaneous fears. As well, four main sources of dental implant-related fear were uncovered: (1) past negative experiences at the dentist; (2) "horror stories" of dental implant surgery; (3) having relatively little knowledge of dental implants; and (4) poor dentist-patient relationship. Discussion. The various forms of dental implant-related fear seem to play a substantial role in influencing a patient's decision to undergo implant surgery.
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36

Bousdras, Vasileios. "Mechanical loading in implant dentistry." Thesis, Royal Veterinary College (University of London), 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439452.

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37

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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38

Meng, Hsiu-Wan. "Soft Tissue Healing around Platform Matched and Switched Dental Implants." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1373290429.

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39

Shah, Sweety Dayanand. "Implant Strength After Implantoplasty." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563401217739776.

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40

Senkal, Doruk. "Haptic surgical aid system with magnetorheological brakes for dental implants." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/d_senkal_111509.pdf.

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Thesis (M.S. in mechanical engineering)--Washington State University, December 2009.
Title from PDF title page (viewed on Jan. 4, 2010). "School of Engineering and Computer Science." Includes bibliographical references (p. 77-81).
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41

Bandeira, de Oliveira Patricia. "Comparing two methods of surgical treatment planning with mini dental implants." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114551.

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Objective: This study evaluated the discrepancies between dental implant treatment planning for surgical guide fabrication using Cone Beam Computerized Tomography (CBCT) with imaging software and a Conventional method based on anatomic landmarks and prosthetic design. Methods: Based on anatomical landmarks in the interforaminal area, four metal guiding sleeves were installed in radiographic templates fabricated on mandibular casts for placement of 64 implants in 16 patients (n=16). Each patient enrolled in the study underwent a CBCT scan with the template in the mouth. The metal sleeves were identified in the tomogram, and their positions were compared to the positions of implants virtually determined with the implant treatment planning software. Using specific tools provided by the software, differences in bony entrance points and angulations, in the mesial-distal and labial-lingual directions, were measured for each implant. Median differences were compared using Wilcoxon signed rank test for clustered data. Results: Median differences (interquartile ranges) of the entrance points based either on anatomical landmarks or imaging software were 0.8 (±0.0–0.85) mm in the mesial-distal direction and 0.7 (±0.0–5.0) mm in the lingual-labial direction (p<0.001). A significant angle difference was observed between the two methods in the mesial-distal and labial-lingual directions (p<0.001). The median (interquartile range) differences in angulations between the two methods were 2.2 (0.0–10.05) degrees and 4.9 (0.0–18.7) degrees (p<0.001), respectively. Conclusion: Planning the placement of implants using CBCT imaging software leads to different implant location and angulations than with conventional treatment planning based on anatomical landmarks; these differences may have an impact on clinical outcomes.
Objectif : Cette étude évalue les différences entre la planification de traitements avec implants dentaires utilisant un guide chirurgical fabriqué à l'aide de la tomographie volumétrique numérisée 3D (Cone Beam Computed Tomography, CBCT) et d'un logiciel d'imagerie, et l'utilisation d'une méthode conventionnelle basée sur des repères anatomiques et sur la conception de prothèses. Méthodes: En se basant sur des repères anatomiques de la région interforaminale, quatre manches métalliques servant de guide ont été installés dans des modèles de radiographie fabriqués sur moule mandibulaire pour le placement de 64 implants chez 16 patients (n = 16). Chaque patient participant à l'étude a passé un examen CBCT avec le modèle dans la bouche. Les manches en métal ont été localisées sur le scan, et leurs positions ont été comparées aux positions d'implants déterminées avec le logiciel de planification d'implants. En utilisant des outils spécifiques fournis par le logiciel, les différences entre les points d'entrée osseux ainsi que les angulations, dans les directions mésio-distale et bucco-linguale, ont été mesurées pour chaque implant. Les différences médianes ont été comparées en utilisant le test des rangs signés de Wilcoxon pour échantillons appariés. Résultats: Les différences médianes (intervalles interquartiles) des points d'entrée basés soit sur la méthode des repères anatomiques ou la méthode du logiciel d'imagerie étaient de 0,8 (0,0 à 0,85) mm dans le sens mésio-distal et 0,7 (0,0 à 5,0) mm dans la direction linguale-labiale (p<0,001). Une différence d'angle significative a été observée entre les deux méthodes dans les directions mésio-distale et labial-linguale (p<0,001). Les différences médianes (intervalle interquartile) des angulations entre les deux méthodes étaient de 2,2 (0,0 à 10,05) degrés et 4,9 (0,0 à 18,7) degrés (p<0,001) respectivement. Conclusion: La planification du placement des implants à l'aide d'un logiciel d'imagerie CBCT a pour résultat une variation dans le positionnement et l'angulation des implants en comparaison à la planification du traitement en utilisant la méthode conventionnelle basée sur les points de repère anatomiques. Ces différences peuvent avoir un impact sur les résultats cliniques.
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42

Carvalho, Breno Carnevalli Franco de 1963. "Análise fotoelástica da distribuição de tensões geradas por carregamento em coroas unitárias suportadas por implantes curto e longo." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288566.

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Orientador: Rafael Leonardo Xediek Consani
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-24T03:25:43Z (GMT). No. of bitstreams: 1 Carvalho_BrenoCarnevalliFrancode_D.pdf: 2254429 bytes, checksum: 0864903c9e5a5e409b843fd792284ecc (MD5) Previous issue date: 2013
Resumo: Implantes curtos são utilizados em situações clínicas quando a altura e/ou a espessura óssea são insuficientes. A proposta neste estudo foi verificar por meio da análise de tensão fotoelástica a influência exercida pela altura e largura da coroa protética na força transmitida aos implantes curto (7 mm) e longo (13 mm) quando o carregamento foi efetuado no centro ou na extremidade das coroas. As dimensões da altura e da largura da coroa simulada foram estabelecidas com base nas dimensões de dentes pré-molar e molar inferiores humanos e a espessura estabelecida em 6 mm. O corpo-de-prova de resina fotoelástica foi feito com o sistema bi componente à base de resina epóxi modificada e endurecedor. Os carregamentos foram de 0,4 kgf no centro e de 0,3 kgf numa das extremidade da coroa. A análise fotoelástica avaliando as ordens de franjas ao redor dos implantes foi feita com polariscópio de transmissão. Cada fotografia foi analisada três vezes no programa Fringes para ordens de franja de 0 a 4, considerando as médias da ordem das franjas e da tensão cisalhante para cada ponto estabelecido no modelo. Os dados foram submetidos à ANOVA dois fatores e diferenças estatísticas comparadas pelo teste t de Student em nível de significância de 5%. Os resultados mostraram que não houve diferença entre os níveis de tensões gerados pela altura e largura das coroas protéticas sobre os implantes curto e longo, quando os carregamentos foram feitos tanto no centro como na extremidade das coroas. Concluiu-se que as tensões geradas sobre os implantes curto e longo foram similares qualquer que fosse o tamanho e o local dos carregamentos aplicados sobre as coroas; houve diferença na magnitude da tensão exercida sobre os implantes curto e longo, sendo maior para o implante curto
Abstract: Short implants are used in clinical situations when the mass of bone is deficient in height and/or thickness. The purpose of this study was to verify the height and width crown influence in the stress transmission in short (7mm) and long (13mm) implants when loaded at center and edge of the crown. The simulated crown dimensions were established using a natural premolar and molar crown dimensions and the thickness was 6 mm. The photoelastic models were made using a dual system based on modified epoxi resin and catalyser. The crowns were loaded with 0,4 kgf at the center and 0,3 kgf at the edge. The photoelastic analysis for fringe order around the implants was made using a transmission polariscope. The maximum shear stress and the fringe values from 0 to 4 were determined in each photography measured three times using Fringes software. Two-way ANOVA and t Student test at 5% significance were perfomed. The results showed no difference in the stress levels produced by different height and width crown over the short and long implants when loaded both center and edge of the crowns. In conclusion, the results showed similar stress on the short and long implants regardless the size and the loaded crown area; however, there was statistical difference in the stress level on the implants being higher for the short implant
Doutorado
Protese Dental
Doutor em Clínica Odontológica
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43

Alvira, González Joaquín. "Utilización de células madre adiposas en procesos de regeneración ósea guiada en defectos de tamaño crítico de la cortical vestibular." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/404301.

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La colocación de implantes se ve limitada en ocasiones por defectos del reborde alveolar debidos principalmente a extracciones traumáticas, procesos infecciosos de los dientes o bien a la reabsorción ósea que tiene lugar tras su extracción. La asociación de los procedimientos de regeneración ósea guiada con técnicas de ingeniería tisular que utilizan células madre en combinación con proteínas que contienen moléculas bioactivas, tiene como objetivo regenerar los defectos óseos con un resultado similar al conseguido por los injertos de hueso autólogo. OBJETIVOS: Determinar el porcentaje de tejido óseo neoformado en defectos críticos de la cortical vestibular mandibular regenerados con un material fosfocálcico (β Fosfato tricálcico, β-TCP) recubierto de fibronectina (Fn) y células madre autólogas de origen adiposo (ADSCs) (β-TCP-Fn-ADSCs) de forma previa o simultánea a la colocación de implantes dentales y compararlo con el obtenido usando un material fosfocálcico sólo (β-TCP) o bien recubierto con fibronectina (β-TCP-Fn), a los tres meses de cicatrización. Asimismo se determinó el porcentaje de hueso en contacto con la superficie de un implante dental en defectos críticos de la cortical vestibular regenerados con los mismos sustitutos óseos a los tres meses de cicatrización. MATERIAL Y MÉTODO: Se efectuaron dos estudios experimentales en 18 perros Beagle, que fueron aprobados por el Comitè Ètic D ́ Experimentació Animal (CEEA 227-109) de la Universitat de Barcelona. Los procedimientos se dividieron en dos fases. En un primer acto quirúrgico se realizaron las exodoncias de ambas hemimandíbulas así como la obtención de la grasa abdominal a partir de la cual se extraerían las células madre adiposas. En la segunda fase quirúrgica se llevó a cabo la creación de cuatro defectos críticos de tipo dehiscencia en cada hemimandíbula que serían regenerados de forma aleatoria con un material fosfocálcico con diferentes tipos de recubrimiento (β-TCP-Fn-ADSCs, β-TCP-Fn, β-TCP), dejando un defecto vació a modo de control. En una hemimandíbula de cada perro se colocó un implante dental en cada defecto de forma simultánea a los procedimientos regenerativos. Los perros se dividieron en tres grupos de estudio que se sacrificaron a 1, 2 o 3 meses del postoperatorio (T1, T2 y T3). Se comprobó la normalidad de las distribuciones mediante la prueba de Kolmogorov-Smirnov. Se calcularon las medias y las desviaciones estándar de los parámetros analizados en el estudio histomorfométrico de las muestras. Las diferencias de las variables histomorfométricas entre el grupo control y los tres grupos de estudio (β-TCP, β-TCP-Fn y β-TCP-Fn-ADSC) en T1, T2 y T3 fueron evaluados con el análisis de la varianza (ANOVA) y las diferencias entre los datos en T1, T2 y T3 con la prueba t-Student para muestras apareadas. Se estableció un valor de significación estadística de p< 0,05. Resultados: El porcentaje de tejido óseo neoformado en defectos críticos de la cortical vestibular tratado con β-TCP-Fn-ADSCs no fue superior al registrado con β-TCP sólo o recubierto con fibronectina (β-TCP-Fn). Asimismo, ninguno de los tres grupos estudio se mostraron superiores frente a los defectos control en los tres tiempos analizados. Los implantes regenerados con β-TCP-Fn-ADSCs no sólo no mejoró los índices de BIC a lo largo de los tres meses de cicatrización frente al resto de defectos sino que incluso registró valores estadísticamente inferiores a los defectos tratados con β-TCP-Fn o al defecto control a los dos meses de cicatrización (p=0,041 y p=0,012). Sin embargo, la utilización de células madre adiposas y fibronectina recubriendo un material fosfocálcico mantuvo el espacio regenerado de forma más eficiente a los tres meses de cicatrización. Conclusiones: La combinación de células madre adiposas con fibronectina como recubrimiento de un biomaterial fosfocálcico en procedimientos regenerativos de defectos de tipo dehiscencia no parece incrementar el porcentaje de tejido óseo neoformado así como de aposición ósea en la superficie de implantes. No obstante, mantiene el espacio regenerado de forma más eficiente a los tres meses de cicatrización con respecto al resto de grupos.
The aim of both experimental studies was to assess bone regeneration potential as well as percentage of BIC (bone implant contact) in three-wall critical size defects of vestibular cortical bone after tooth extraction and implant placement, using a ceramic biomaterial (β-tricalcium phosphate β-TCP) alone or coated with fibronectin (β-TCP-Fn), or the combination of fibronectin and ADSCs (β-TCP -Fn-ADSCs) as compared with a control defect (without biomaterial filling) after three months of healing. MATERIAL AND METHOD: Both studies were carried out on 18 Beagle dogs. They were approved by the Committee of Animal Experimentation (CEEA 227-109) of the University of Barcelona. Four critical dehiscence defects were created in both hemiarches that were randomly regenerated with a different phosphocalic material (β-TCP-Fn-ADSCs, β-TCP-Fn, β-TCP). One defect was left empty as a control. A dental implant was placed simultaneously to the regenerative procedures in each defect of one hemiarch. The animals were divided into three groups according to the time of euthanasia (1, 2, or 3 months of healing). The differences in the histomorphometric variables between the control group and the three study groups (β-TCP, β-TCP-Fn and β-TCP-Fn-ADSC) at T1, T2 and T3 were evaluated with the analysis of variance (ANOVA) and the differences between data at T1, T2 and T3 with the Student's t-test for paired samples. RESULTS: The percentage of neoformed bone as well as BIC in critical size defects of vestibular cortical bone treated with β-TCP-Fn-ADSCs was not statistically superior than that registered with β-TCP alone or coated with fibronectin (β-TCP-Fn). Likewise, none of the three study groups were superior to the control defects in the three evaluated times. However, the use of adipose stem cells and fibronectin coating a phosphocalcium material maintained the regenerated space more efficiently after three months of healing. CONCLUSIONS: The combination of adipose stem cells with fibronectin as a coating of a phosphocalcium biomaterial in regenerative procedures of dehiscence type defects does not seem to increase the percentage of neoformed bone tissue as well as bone apposition on the implant surface. However, it maintains the regenerated space more efficiently after three months of healing compared to the other groups.
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44

Coronado, López Samantha Lucely. "Factores de riesgo en el fracaso de implantes dentales." Master's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2018. http://hdl.handle.net/10757/626285.

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Los implantes dentales le proporcionan tanto al paciente como al profesional de la salud dental opciones adicionales previamente no disponibles para mejorar la función y/o estética. Aunque el reemplazo de piezas dentarias que se han perdido con implantes dentales es un tratamiento efectivo, su predictibilidad recae en el éxito de la oseointegración durante el proceso de cicatrización posterior a la intervención quirúrgica, sin embargo, existen diferentes factores que pueden intervenir o afectar este proceso. El objetivo de esta revisión es explorar algunos de los factores de riesgo que pueden aumentar la incidencia de fracaso en el tratamiento de implantes dentales
Dental implants provide the patient and dental health professional with additional options previously unavailable for improving function and/or aesthetics. Although replacement of lost teeth with dental implants is an effective treatment, their predictability depends on successful osseointegration during the healing process, nevertheless there is various amounts of factors that can interfere or affect this healing process. The aim of this review is to explore some of the risk factors that could increase failure incidence in the treatment of dental implants.
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45

Abu-Hammad, Osama Abdalla M. "The influence of some factors on compressive stress levels around dental implants." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337637.

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46

Brett, Christopher A. "Azithromycin concentration in peri-implant crevicular fluid and its influence on microbial colonization dynamics following a single prophylactic dose prior to implant placement." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562330930491338.

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47

Gil, Mindy S. "Comprehensive Optical Assessment of Peri-Implant Mucosa." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:17331958.

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Esthetic outcomes with implants begin with proper implant placement, but the predictability of the peri-implant esthetic outcome is also affected by patient’s pre-existing or reconstructed local tissue. An unpleasant optical phenomenon where the peri-implant mucosa appears gray has been documented in the literature. However, it’s etiology and solutions have not yet been fully investigated. The overall goal of this project is to perform comprehensive optical examination and to establish the clinical guideline to achieve optimal peri-implant mucosa. A. Specific Aim 1: Assess the optical properties of the peri-implant mucosa. A total of 40 patients who has a healthy, single bone level implant in the maxillary anterior zone is recruited at HSDM. For each patient, the test site (peri-implant mucosa) and the control site (adjacent natural gingiva) are identified. Using a dental spectrophotometer, CIELAB color coordinates, translucency parameter (TP), and thickness of test and control site are measured. We found that the color of peri-implant mucosa of bone level implants is significantly different from adjacent gingiva (p=0.0003). We further found that while color of the peri-implant mucosa are significantly different from those of the adjacent gingiva, the thickness and TP do not contribute to this color difference. B. Specific Aim 2: Evaluate the vascular morphology change of the peri-implant mucosa. Studies have shown that a significant vascular reconstruction takes place around a dental implant. Therefore, using a narrow band imaging endoscope, interpapillary capillary loops (IPCL) around a dental implant are compared to those around a natural tooth. We found that there are more interpapillary capillary loops in peri-implant mucosa compared to gingiva (p=0.02). C. Specific Aim 3: Determine the threshold for soft tissue color discernment While many studies have demonstrated the color threshold for shades of teeth and restorations, there is very little information with respect to soft tissue colors. Therefore, in controlled in-vivo and ex-vivo settings, color threshold of soft tissue was investigated, and a correlation between the objective color threshold (ΔE) and subjective color threshold for soft tissue color were also determined. For soft tissue, objective threshold is found to be ΔE=6.50-6.99, and the correlation between subjective and objective evaluations is significant (r=0.67) in ex-vivo setting. D. Specific Aim 4: Evaluate the efficacy of the newly developed colored abutment on improving the optical property. In order to improve this gray optical phenomenon, a pink colored abutment system has been developed. In a randomized manner, we investigated the color of the peri-implant mucosa with pink and gray abutment. We found that this pink colored abutment can significantly improve the aforementioned optical phenomenon, especially in those with thin tissue (<2mm) (p=0.04) and those with pink neck implant (p=0.04). The clinical significance, however, still needs to be determined.
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48

Mir, Mari Javier. "Estudio sobre la influencia de la sutura y la técnica quirúrgica en la estabilidad dimensional primaria en la regeneración ósea guiada en implantología mediante el uso de la tomografía computada de haz cónico." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/404254.

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INTRODUCCIÓN La regeneración ósea guiada (ROG) en combinación con la colocación de implantes dentales se ha convertido hoy en día un procedimiento de rutina. Aunque uno de los aspectos más críticos para el éxito de la ROG es la estabilización del material de regeneración, sorprende observar la falta de conocimiento y evidencia que existe en relación al comportamiento dimensional de los materiales de regeneración. Los objetivos de la presente investigación fueron evaluar la influencia de las maniobras de sutura del colgajo sobre la estabilidad dimensional de la ROG y la influencia de las características del material de regeneración en la mejora de la estabilidad dimensional durante la sutura del colgajo. MATERIAL Y MÉTODOS Se diseñaron dos estudios in vitro en mandíbula de cerdo con defectos periimplantarios de 3 paredes. En la primera parte de la investigación se compararon 3 combinaciones de materiales de regeneración: (1) Particulado (xenoinjerto particulado + membrana de colágeno) (n=20). (2) Particulado + Chinchetas (I) (xenoinjerto particulado + membrana de colágeno + chinchetas de fijación) (n=20). (3) Bloque sólido (xenoinjerto en bloque sólido + membrana de colágeno) (n=20). En la segunda parte, se compararon 2 técnicas de regeneración: (1) Particulado + Chinchetas (II) (xenoinjerto particulado + membrana de colágeno + chinchetas de fijación) (n=20) (2) Bloque blando en L (xenoinjerto en bloque blando en forma de L+ xenoinjerto particulado + membrana de colágeno + chinchetas de fijación) (n=20). Se tomaron tomografías computadas de haz cónico antes y después de la sutura de los colgajos. El grosor en sentido horizontal (HT) de la zona aumentada fue medido a nivel del cuello del implante (HT0mm) y a 1, 2, 3, 4 y 5 mm (HT1mm - HT5mm) apicalmente. En el grupo Bloque blando en L de la segunda parte de la investigación se registraron 2 medidas adicionales: el grosor vertical (VT) y el grosor a 45º (45-T). El análisis estadístico se realizó mediante tests de ANOVA para medidas repetidas. RESULTADOS Las maniobras de la sutura provocaron cambios significativos en el grosor de la regeneración a nivel de HT0mm y HT1mm en todos los grupos (p ≤ 0,05). El uso de chinchetas o un xenoinjerto en bloque sólido mejoraron significativamente la estabilidad dimensional en comparación con un xenoinjerto particulado y una membrana de colágeno (p ≤ 0,05). La pérdida de grosor a nivel del cuello del implante (HT0mm) fue del 42,8±17,9% (DS) para el grupo Particulado, del 22,9±21,2% (DS) para Particulado + Chinchetas y del 20,2 ± 18,9% (DS) para el grupo Bloque (p ≤ 0,05). Esta pérdida se redujo hasta el 2,4±9,2% (DS) en el grupo Bloque blando en L de la segunda parte del estudio (p ≤ 0,05). Por último, no se detectaron diferencias significativas en la comparación entre el grupo Particulado + Chinchetas (I) y Particulado + Chinchetas (II) (p > 0,05). CONCLUSIONES El cierre del colgajo causó un desplazamiento significativo del material de regeneración y un colapso parcial de la membrana de colágeno, en especial en la porción más coronal de la regeneración. La estabilidad del material de regeneración mejoró sustancialmente cuando se utilizaron chinchetas de fijación o cuando se utilizó un bloque sólido en lugar del sustituto óseo en forma particulada. La estabilidad dimensional coronal de la ROG durante la sutura mejoró de forma significativa al utilizar una combinación de sustituto óseo en bloque blando en forma de L junto con xenoinjerto particulado y membrana de colágeno fijada con chinchetas. Por último, el modelo de defectos periimplantarios in vitro en mandíbula de cerdo se mostró como un método fiable para la investigación de la estabilidad primaria de los biomateriales utilizados en la ROG.
INTRODUCTION: Guided bone regeneration (GBR) in combination with implant placement has become a routine treatment. However, there is still a lack of evidence regarding critical aspects of such GBR procedures, especially the ones related with primary stability of the graft materials. Accordingly, the present investigation was designed to analyze the influence of flap manipulation and guided bone regeneration materials with respect to the volume stability of the augmented region during suturing of mucosal flaps. MATERIAL AND METHODS: Peri-implant box-shaped bone defects were created in pig mandibles. Three procedures were tested in the first part of the investigation: - Granulate (particulated xenograft + collagen membrane) - Granulate + Pins (I) (particulated xenograft + collagen membrane + fixation pins) - Solid block (block xenograft + collagen membrane) Two procedures were tested in the second part: - Granulate + Pins (II) (particulate xenograft applied buccally + collagen membrane + pins) - L-shaped soft-block (particulate xenograft applied buccally + L-shaped soft-block xenograft applied buccally and occlusally + collagen membrane + pins) Cone beam computed tomography scans were obtained prior and after blinded wound closure. The horizontal thickness (HT) of the augmented region was assessed at the implant shoulder (HT0mm) and at 1 mm to 5 mm apical to the implant shoulder (HT1mm - HT5mm). Repeated measures ANOVA were used for statistical analysis. RESULTS: Wound closure induced a statistically significant change of HT0mm and of HT1mm in all the treatment groups (p≤0.05). The use of fixation pins or a solid block performed better than a particulated xenograft plus collagen membrane alone (p≤0.05). The addition of a L-shaped block statistically improved stability (p≤0.05). CONCLUSION: Wound closure induced significant displacement of the bone substitute, especially in the coronal portion of the augmented site. The stability of the bone substitute and collagen membrane was enhanced by the application of fixation pins and by the use of block bone substitute instead of particulated bone substitute. However, still a 20% of graft displacement was detected at the coronal level. Finally, the addition of a L-shaped soft-block substantially improved coronal stability.
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49

Saha, Saroj Kumar. "Effect of corticosteroid medication of periodontal and implant related procedures." Thesis, University of Colorado at Denver, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10126245.

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Background: Corticosteroid medications have been researched extensively in oral surgery procedures for the proposed reduction in trismus, swelling, and pain. No consensus has been determined for the most efficacious type, timing, and dosage of medication thus far. In addition little is known about the usage of corticosteroids for periodontal and implant related procedures. The aims of this review are to help clinicians understand the usage of corticosteroid medications in various dental surgeries.

Methods: The PubMed-MEDLINE and the Cochrane-CENTRAL databases were searched through and up till June 2015 to identify appropriate studies regarding this aim. Appropriate studies were those reporting on the usage of corticosteroids related to its pathophysiology, surgical related outcomes, and patient related outcomes in dental procedures.

Conclusions: The search yielded 256 unique papers after selection resulted in 12 publications that met the eligibility criteria. In general the usage of corticosteroids in third molar extractions improved post operatives outcomes related to edema, trismus, and a slight reduction in pain. However, It cannot be recommended to use corticosteroids for pain management. Due to the various types, routes, and dosages of corticosteroid used in studies, no specific drug, route, or dosage can be recommended by literature. The usage of corticosteroids for periodontal and implant related procedures has not been investigated. Further research is required to investigate the possible benefits of corticosteroids on reduction of surgical swelling in periodontal and implant related surgeries.

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50

Gray, Crawford F. "The development of magnetic resonance imaging for implant dentistry." Thesis, University of Glasgow, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250064.

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