Three-dimensional Finite Element Analysis of Internal Conical Joint Implant-supported Fixed Prostheses in the Posterior Maxilla

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Book Synopsis Three-dimensional Finite Element Analysis of Internal Conical Joint Implant-supported Fixed Prostheses in the Posterior Maxilla by :

Download or read book Three-dimensional Finite Element Analysis of Internal Conical Joint Implant-supported Fixed Prostheses in the Posterior Maxilla written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There are various implant placement options, such as using a short implant or changing the direction of the implant placement to use more residual bone. Currently, the connection design between implant fixture and the abutment is in two forms: external hex type and internal conical type. The biomechanical information on the various implant systems and various implant placement option is not sufficient to determine reliable treatment plans and implant choices.This study aimed to compare the functional stresses generated in the internal conical joint implant, prosthesis and supporting bone in the posterior maxilla, using finite element method.Two internal joint type implant (u00d85 X 7mm, u00d85 X 13mm) with TS2 SA fixture design of Osstem (Seoul, Korea) were modeled by computer-aided design software (Solidwork 2018). The posterior maxillary bone and 3-unit all zirconia crowns were also simulated. Three different scenarios were modeled with various implant alignment (SI3; 3 unit fixed prosthesis on 3 short implant abutments, SI2; 3 unit fixed prosthesis on 2 short (7mm) implant abutments, AI2; 3 unit fixed prosthesis on 1 short implant abutment and 1 long (13mm) implant with an angled abutment). A load of 30 N was applied vertically and obliquely, respectively to each of 12 occlusal contact points of the crown.The maximum Mises stresses produced by oblique loading was observed near the connection interfaces of the abutment. The peak value was 430 MPa for SI3, 568 MPa for SI2 and 656 MPa for AI2 respectively. There was no significant difference in peak von Mises stress between models due to vertical loading. The maximum compressive stresses due to oblique load on the supporting bone adjacent to the implant were 145 MPa for SI3, 204 MPa for SI2 and 200 MPa for AI2, respectively.Internal joint type design of implant concentrated the stresses to the conical interface between fixture and abutment interface, demonstrating the wedge effect between them. Increasing the number of implants was the most effective contributing factor to reduce the stresses in the internal conical joint implant and supporting bone in our study models.

Stress Distribution of External Hex Joint Implant-supported Fixed Prostheses in the Posterior Maxilla- 3-D Finite Element Analysis

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (116 download)

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Book Synopsis Stress Distribution of External Hex Joint Implant-supported Fixed Prostheses in the Posterior Maxilla- 3-D Finite Element Analysis by :

Download or read book Stress Distribution of External Hex Joint Implant-supported Fixed Prostheses in the Posterior Maxilla- 3-D Finite Element Analysis written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: If the bone graft is not performed in the atrophied posterior maxilla, there are various implant placement options, such as using a short implant or changing the direction of the implant placement to use more residual bone. Biomechanical information regarding different implant systems and different implant placement options is not sufficient to determine a reliable treatment plan and implant selection. The purpose of this study was to analyze functional stresses generated in the external hex joint implant, prosthesis and supporting bone in the posterior maxilla using finite element method. Two external hex type implant (u00d85 X 7mm, u00d85 X 13mm) with the design of the US3 SA fixture of Osstem (Seoul, Korea) were modeled by computer-aided design software (Solidwork 2018). The posterior maxillary bone and 3-unit all zirconia crowns were also simulated. Three different scenarios were modeled with various implant alignment (S3E; 3 unit fixed prosthesis on 3 short implant abutments, S2E; 3 unit fixed prosthesis on 2 short (7mm) implant abutments, A2E; 3 unit fixed prosthesis on 1 short implant abutment and 1 long (13mm) implant with an angled abutment). A load of 30 N was applied vertically and obliquely, respectively to each of 12 occlusal contact points of the crown. Regardless of load direction, the highest von Mises stresses of the implants and prosthesis occurred in the screw tightening contact area of the external hex abutment. The values of maximum von Mises stresses due to vertical load were similar between each model. The values ranged from 250 MPa to 270 MPa. The maximum von Mises stresses produced by oblique load at the abutment were 277, 283, and 317MPa for the A2E, S3E, and S2E models, respectively. The maximum compressive stresses due to the oblique load on the marginal bone adjacent to the implant was 224 MPa in S3E, 342 MPa in A2E, and 362 MPa in S2E, respectively. Externally connection design of implant showed well-distributed stress around all components of the implant system. The maximum stresses generated in the implant was within the yield strength limit of the material. A 3-unit fixed bridge with 2 short implants (Model S2E) generated the largest compressive stresses around the bone adjacent to the external hex type implant.

Finite Element Stress Analysis on the Effect of an Implant Alignment, Offset and Load Direction in the Posterior Mandible

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (116 download)

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Book Synopsis Finite Element Stress Analysis on the Effect of an Implant Alignment, Offset and Load Direction in the Posterior Mandible by :

Download or read book Finite Element Stress Analysis on the Effect of an Implant Alignment, Offset and Load Direction in the Posterior Mandible written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Background;Slight offset of the central implant in 3-unit implant-supported prostheses has been recommended to improve biomechanical behavior.However, studies that assessed the effects of an offset implant congfiguration in the posterior mandible are rare.Aim/Hypothesis;The purpose of this 3-dimensional (3D) finite element study was to assess the effects of load direction and number of implant in 3-unitimplant-supported prostheses with varying implant positions (straight-line or offset) on the stress distribution in the implant,prosthesis, and bone tissue.Materials and Methods;Three 3D models were used to simulate a posterior mandible bone block: 2 implants and 3-unit fixed dental prosthesis(FDP) with apontic in the middle (model M1), 2 implants and 3-unit FDP with a cantilever pontic at one end (model M2), FDP supported by 3implant with straight line placement (model M3) and FDP supported by 3 implant with staggered implant configuration (model M4).The applied forces were 120 N axially (L1), or 120 N obliquely(L2). The type of implant platform simulated was an external hexagon.Maximum von Mises stress (VMS) on the fixture, abutment, screws, fixed prosthesis and supporting alveolar bone was measured andanalyzed.Results;Peak VMS in the implants by oblique loading were 10-25 times greater in implant and 6-12 times greater in alveolar bone,respectively than the stresses by axial loading.Compared to the maximum stress value of the implant by oblique loading in model M1, the maximum stress value increased to 116%in M2, but decreased to 74% and 71% in M3 and M4, respectively.In the cantilevered M2 model, the maximum stress values in the FDP were 851.5 and 908.4 MPa, respectively, by the vertical andoblique loadings, which are 5.1 and 7.1 times higher than the other models, respectively.The area of maximum stress in the implant was located around the area where the abutment screw and fixture were connected.Stress concentration was observed at an abutment screw by oblique load and at the top of the implant fixture by axial load.In the supporting bone, the maximum stress value increased to 120% in M2, but decreased to 69% and 63% in M3 and M4,compared to the stress in M1 by oblique load.Conclusions and Clinical Implications;The effect of staggered alignment on implant stress was negligible, but the cantilever design of the prosthesis and the number ofimplants had a greater impact on stress distrubution.

Application of the Finite Element Method in Implant Dentistry

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Publisher : Springer Science & Business Media
ISBN 13 : 3540737642
Total Pages : 148 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Application of the Finite Element Method in Implant Dentistry by : Jianping Geng

Download or read book Application of the Finite Element Method in Implant Dentistry written by Jianping Geng and published by Springer Science & Business Media. This book was released on 2008-09-26 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book creates the theoretical foundation that novices need to perform the finite element method in implant dentistry. It shows how both the implant dentist and the designer can benefit from finite element analysis. The authors explain the theory and math of the finite element method. Then, you get practical applications alongside discussions of the critical issues in using finite element analysis for dental implant design.

Three-dimensional Finite Element Analysis of Mandibular Overdentures Supported by Mini-implants

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ISBN 13 :
Total Pages : 67 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Three-dimensional Finite Element Analysis of Mandibular Overdentures Supported by Mini-implants by : Scully, Jessica Scully

Download or read book Three-dimensional Finite Element Analysis of Mandibular Overdentures Supported by Mini-implants written by Scully, Jessica Scully and published by . This book was released on 2017 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effect of using two anterior denture-supporting mini implants (mIMP2) compared to four (two anterior and two posterior) denture-supporting mini-implants (mIMP4) on the stress experienced by the mini-implants and the strain experienced by the peri-implant and analogous posterior bone. The stress and strain values were also compared to known values of strength for the mini-implants and physiologic strain values. Finite element modeling was used to study the effects. Two models were created identically, with the exception of the number of denture-supporting mini-implants used, and contained modeled mucosa, cortical bone, cancellous bone, and the mini-implants. The models were loaded over one second with three 70N loads bilaterally and results with collected using a PostView program. The anterior mini-implants in both models showed stresses that would not put them at risk for fracture. The posterior mini-implants in mIMP4 experienced stresses above their yield point, indicating that they could be at risk for fracture. Strain in the peri-implant bone anteriorly and the posterior bone in mIMP2 was in the physiologic range. The posterior peri implant bone in mIMP4 showed strains that were above physiologic, which indicates this region could be at risk for bone resorption. Based on the limitations of this study, posterior mini-implants and posterior peri implant bone could be at risk for fracture and pathologic resorption. Dentists must weigh the risks and benefits of using mini-implants to support overdentures in each clinical case to determine if the treatment could be successful in light of the potential negative consequences.

Cantilever Implant Supported Fixed Partial Denture

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ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (56 download)

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Book Synopsis Cantilever Implant Supported Fixed Partial Denture by : Esam Y. Alhezami

Download or read book Cantilever Implant Supported Fixed Partial Denture written by Esam Y. Alhezami and published by . This book was released on 2003 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three-dimensional Finite Element Analysis of the Stresses in a Posterior Cantilever Fixed Partial Denture

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ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (183 download)

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Book Synopsis Three-dimensional Finite Element Analysis of the Stresses in a Posterior Cantilever Fixed Partial Denture by : Hania A. Awadalla

Download or read book Three-dimensional Finite Element Analysis of the Stresses in a Posterior Cantilever Fixed Partial Denture written by Hania A. Awadalla and published by . This book was released on 1987 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three Dimensional Finite Element Analysis of a Single Lap Bolted Joint of Thick Isotropic Materials

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ISBN 13 :
Total Pages : 230 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis Three Dimensional Finite Element Analysis of a Single Lap Bolted Joint of Thick Isotropic Materials by : Florin Iancu

Download or read book Three Dimensional Finite Element Analysis of a Single Lap Bolted Joint of Thick Isotropic Materials written by Florin Iancu and published by . This book was released on 2003 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three Dimensional Finite Element Analysis of a Bolted Joint

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ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (364 download)

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Book Synopsis Three Dimensional Finite Element Analysis of a Bolted Joint by : Harshavardhan Reddy

Download or read book Three Dimensional Finite Element Analysis of a Bolted Joint written by Harshavardhan Reddy and published by . This book was released on 1995 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three Dimensional Finite Element Analysis of a Mandibular Implant

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ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.:/5 (4 download)

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Book Synopsis Three Dimensional Finite Element Analysis of a Mandibular Implant by : Michael Edwin Esterle

Download or read book Three Dimensional Finite Element Analysis of a Mandibular Implant written by Michael Edwin Esterle and published by . This book was released on 1996 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three Dimensional Finite Element Analysis of a Tibial Ankle Prosthesis

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ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (245 download)

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Book Synopsis Three Dimensional Finite Element Analysis of a Tibial Ankle Prosthesis by : Harrison Philip Crowell (III)

Download or read book Three Dimensional Finite Element Analysis of a Tibial Ankle Prosthesis written by Harrison Philip Crowell (III) and published by . This book was released on 1990 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Use of Angulated Implants in the Maxillary Tuberosty Region. A 3-Dimensional Finite Element Analysis Study

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (695 download)

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Book Synopsis The Use of Angulated Implants in the Maxillary Tuberosty Region. A 3-Dimensional Finite Element Analysis Study by :

Download or read book The Use of Angulated Implants in the Maxillary Tuberosty Region. A 3-Dimensional Finite Element Analysis Study written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The prosthetic rehabilitation of edentulous maxillary arches is a challenging procedure. When an implant retained prosthesis is considered, more satisfactory results can be obtained but the anatomy and the bone quality of the maxilla limits the usege of dental implants in in edentulous maxilla and necessiates advanced surgical procedures. The use of tuber implants are becoming increasingly in comprehensive restorative procedures. There are limited numbers of studies on tuber implants, many of which have examined either the success and/or survival rate of implants or discussed the surgical difficulties of them. None of them have evaluated the biomechanical factors related to implant tilting. this study is designed to examine in-vitro the magnitude and character of the loads acting on the tilted implants in the tuberosity region. An anatomical 3-D finite element model of an atrophied maxilla was constructed. The implants were placed with different angles. Horizontal and vertical loads were applied. According to the results of this study, the tuberosty area can be used for implant placement. The results of this numerical study coincided with the results of clinical studies.

From 3D Medical Image Reconstruction to Finite Element Simulation

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (122 download)

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Book Synopsis From 3D Medical Image Reconstruction to Finite Element Simulation by : José Fernando Valera Jiménez

Download or read book From 3D Medical Image Reconstruction to Finite Element Simulation written by José Fernando Valera Jiménez and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The work performed in the present Master's Thesis entailed the assessment of two problems of clinical interest through two separate studies based on finite element analysis (FEA). The first study evaluated the biomechanical behaviour of dental prostheses supported by implants with different diameters. In this context, narrow-diameter implants (NDIs) have been traditionally identified with higher rates of failure in comparison with standard-diameter implants (SDIs) and widediameter implants (WDIs) since they generate a more unfavourable stress distribution. However, it is well known that the load sharing effect associated with prostheses supported by multiple implants (also called splinted prostheses) involves mechanical benefits. Therefore, this study was conducted to evaluate by means of FEA whether the risks linked to NDIs could be mitigated by the mechanical advantages related to the splinting concept. For that purpose, a 3D model of a real maxilla was reconstructed from images of computed tomography (CT) and different implants (NDIs, SDIs and WDIs) and prostheses were created by using computer-aided design (CAD) tools. Biting forces were simulated on the prostheses of three different rehabilitation solutions: single-implant restoration, 3-unit bridge and All-on-4 treatment. The mechanical benefits of the splinting concept were verified: in comparison with unsplinted NDIs, splinted NDIs supporting the 3-unit bridge implied average reductions in terms of volume overloaded under compression and tension, in that order, by 32% and 64% in cancellous bone and 76% and 73% in cortical bone. However, splinted NDIs supporting the typical full-arch of the All-on-4 treatment resulted in the highest risk of overloading found in the study due to the increase of the compressive stress levels generated around the tilted implant when loading the cantilevered molar. On the other hand, the second study was carried out to compare, in terms of microarchitecture and permeability, a human L3 vertebra and two commercial synthetic foams. These foams are used in in vitro permeability tests for vertebroplasty studies under the assumption that their microarchitecture is similar to that of real vertebrae. The methodology was based on the reconstruction of 3D models from micro-computed tomography (μCT) images and the computation of flow dynamic simulations in different regions of the models. On average, vertebral bone revealed a more intricate and compact microstructure than the one of the foams. These findings agree with the lower values of permeability found in the vertebra when compared with the foams. Moreover, foams showed an isotropic architecture whereas the nature of the vertebra was clearly anisotropic. Finally, among the representative histomorphometric indices for porous materials, the index of specific surface area (BS/TV) was the one that better captured the relationship between the permeability and the internal microarchitectural features of the samples analysed.

Three Dimensional Finite Element Analysis of the Transmandibular Implant System

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Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Three Dimensional Finite Element Analysis of the Transmandibular Implant System by : Aldo F. Leopardi

Download or read book Three Dimensional Finite Element Analysis of the Transmandibular Implant System written by Aldo F. Leopardi and published by . This book was released on 1993 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three-dimensional Finite Element Analysis of the Tibial Component in a Total Knee Prosthesis to Study the Problem of Polyethylene Wear

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ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (957 download)

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Book Synopsis Three-dimensional Finite Element Analysis of the Tibial Component in a Total Knee Prosthesis to Study the Problem of Polyethylene Wear by : Sourajyoti Basu

Download or read book Three-dimensional Finite Element Analysis of the Tibial Component in a Total Knee Prosthesis to Study the Problem of Polyethylene Wear written by Sourajyoti Basu and published by . This book was released on 1995 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Three-dimensional Finite Element Stress Analysis in and Around the Isis Endosseous Dental Implant

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ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (223 download)

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Book Synopsis A Three-dimensional Finite Element Stress Analysis in and Around the Isis Endosseous Dental Implant by : Robert J. Seckinger

Download or read book A Three-dimensional Finite Element Stress Analysis in and Around the Isis Endosseous Dental Implant written by Robert J. Seckinger and published by . This book was released on 1989 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Finite Element Analysis of a Three-dimensional Model of the Proximal Femur Containing a Cemented Prosthesis

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ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.:/5 (234 download)

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Book Synopsis Finite Element Analysis of a Three-dimensional Model of the Proximal Femur Containing a Cemented Prosthesis by : Rajesh V. Duggineni

Download or read book Finite Element Analysis of a Three-dimensional Model of the Proximal Femur Containing a Cemented Prosthesis written by Rajesh V. Duggineni and published by . This book was released on 2005 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: