Effects of different implant–abutment connections on micromotion and stress distribution: Prediction of microgap formation

2012 ◽  
Vol 40 (6) ◽  
pp. 467-474 ◽  
Author(s):  
Syafiqah Saidin ◽  
Mohammed Rafiq Abdul Kadir ◽  
Eshamsul Sulaiman ◽  
Noor Hayaty Abu Kasim
Keyword(s):  
Stress Distribution ◽  
Implant Abutment

scholarly journals Influence of implant-abutment angulations and crown material on stress distribution on central incisor: a 3D FEA

2015 ◽  
Vol 14 (4) ◽  
pp. 323-329 ◽  
Author(s):  
Mohamed I. El-Anwar ◽  
Khairy E. AL-Azrag ◽  
Mohamed H. Ghazy ◽  
Lamia E. Dawood
Keyword(s):  
Stress Distribution ◽  
Central Incisor ◽  
Implant Abutment ◽  
3D Fea

Comparison of stress distribution in a three unit cement retained implant supported prosthesis with different implant abutment connections: A photoelastic analysis

2020 ◽  
Vol 12 (1) ◽  
pp. 35-43
Author(s):  
Dr Poojya R ◽  
Dr Darakshan Nazir ◽  
Dr Shruthi C S
Keyword(s):  
Stress Distribution ◽  
Axial Loading ◽  
The Body ◽  
Partial Denture ◽  
Fixed Partial Denture ◽  
Group I ◽  
Significant Difference ◽  
Implant Abutment ◽  
Oblique Loading ◽  
Group Ii

Aim: With the emphasis on success of implant supported prosthesis, and health of the surrounding tissues that are related to accuracy, and fit between the implant components, stability at implant abutment interface is of prime importance. The aim of this study is to evaluate and compare the stress distribution in three unit cement retained implant supported fixed partial denture with different implant abutment connections through photo elasticity. Materials and methods: Two photo elastic resin models were fabricated of standard dimensions (44mmx22mmx10mm). Group I sample: Three unit cement retained implant supported fixed partial denture with Internal implant abutment connection (Internal hexagonal connection) (Paltop Advanced, Keystone Dental Company, US)Group II sample: Three unit cement retained implant supported fixed partial denture with conical Morse taper connection (1.5 degree Morse taper) (Paltop Conical Active, Keystone Dental Company, US). Three unit cement retained implant supported fixed partial denture simulated missing mandibular first molar. Axial and oblique loads of 100N were placed on each implant and pontic area for 10 sec. Ten tests were done for each group. The stress values around the implants were derived from the colored fringe patterns obtained through polariscope, which were photographed after load applications from which values were derived. Results: Under axial loading, there was statistically significant difference between internal hexagonal connection and Morse taper connection in three unit implant supported prosthesis. Stresses were more in Group II sample with Morse taper connection. Under oblique loading, there was no statistically significant difference between Group I and Group II samples. Conclusion: Within the limitations of this in vitro study, it can be concluded that Internal hexagonal connection showed less stresses as compared to Morse taper connection in a three unit cement retained implant supported prosthesis. Stresses were concentrated more in apical area under axial loading; while under oblique loading stresses were seen on the side of application of force on the body of the implant and on the apical region. However, stresses were uniformly distributed in both groups I and group II samples. In both groups stresses under oblique loading were more than axial loading, but that was not statistically significant.

scholarly journals Fracture Resistance of Monolithic Zirconia Crowns on Four Occlusal Convergent Abutments in Implant Prosthesis

2019 ◽  
Vol 9 (13) ◽  
pp. 2585 ◽  
Author(s):  
Ting-Hsun Lan ◽  
Chin-Yun Pan ◽  
Pao-Hsin Liu ◽  
Mitch M.C. Chou
Keyword(s):  
Cyclic Loading ◽  
Stress Distribution ◽  
Surface Area ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Hydraulic Testing ◽  
Occlusal Surface ◽  
Von Mises Stress ◽  
Implant Abutment ◽  
Von Mises

Adjusting implant abutment for crown delivery is a common practice during implant installation. The purpose of this study was to compare the fracture resistance and stress distribution of zirconia specimens on four occlusal surface areas of implant abutment. Four implant abutment designs [occlusal surface area (SA) SA100, SA75, SA50, and SA25] with 15 zirconia prostheses over the molar area per group were prepared for cyclic loading with 5 Hz, 300 N in a servo-hydraulic testing machine until fracture or automatic stoppage after 30,000 counts. The minimum occlusal thickness of all specimens was 0.5 mm. Four finite element models were simulated under vertical or oblique 10-degree loading to analyze the stress distribution and peak value of zirconia specimens. Data were statistically analyzed, and fracture patterns were observed under a scanning electron microscope. Cyclic loading tests revealed that specimen breakage had moderately strong correlation with the abutment occlusal area (r = 0.475). Specimen breakage differed significantly among the four groups (P = 0.001). The lowest von Mises stress value was measured for prosthesis with a smallest abutment occlusal surface area (SA25) and the thickest zirconia crown. Thicker zirconia specimens (SA25) had higher fracture resistance and lowest stress values under 300 N loading.

Stress Analysis in Platform-Switching Implants: A 3-Dimensional Finite Element Study

2012 ◽  
Vol 38 (5) ◽  
pp. 587-594 ◽  
Author(s):  
Eduardo Piza Pellizzer ◽  
Fellippo Ramos Verri ◽  
Rosse Mary Falcón-Antenucci ◽  
Joel Ferreira Santiago Júnior ◽  
Paulo Sérgio Perri de Carvalho ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Stress Distribution ◽  
3 Dimensional ◽  
Finite Element Study ◽  
Significant Difference ◽  
Implant Abutment ◽  
Dimensional Finite Element ◽  
Platform Switching ◽  
Element Study

The aim of this study was to evaluate the influence of the platform-switching technique on stress distribution in implant, abutment, and peri-implant tissues, through a 3-dimensional finite element study. Three 3-dimensional mandibular models were fabricated using the SolidWorks 2006 and InVesalius software. Each model was composed of a bone block with one implant 10 mm long and of different diameters (3.75 and 5.00 mm). The UCLA abutments also ranged in diameter from 5.00 mm to 4.1 mm. After obtaining the geometries, the models were transferred to the software FEMAP 10.0 for pre- and postprocessing of finite elements to generate the mesh, loading, and boundary conditions. A total load of 200 N was applied in axial (0°), oblique (45°), and lateral (90°) directions. The models were solved by the software NeiNastran 9.0 and transferred to the software FEMAP 10.0 to obtain the results that were visualized through von Mises and maximum principal stress maps. Model A (implants with 3.75 mm/abutment with 4.1 mm) exhibited the highest area of stress concentration with all loadings (axial, oblique, and lateral) for the implant and the abutment. All models presented the stress areas at the abutment level and at the implant/abutment interface. Models B (implant with 5.0 mm/abutment with 5.0 mm) and C (implant with 5.0 mm/abutment with 4.1 mm) presented minor areas of stress concentration and similar distribution pattern. For the cortical bone, low stress concentration was observed in the peri-implant region for models B and C in comparison to model A. The trabecular bone exhibited low stress that was well distributed in models B and C. Model A presented the highest stress concentration. Model B exhibited better stress distribution. There was no significant difference between the large-diameter implants (models B and C).

Stress distribution in implant-supported prosthesis with external and internal implant-abutment connections

2012 ◽  
Vol 71 (2) ◽  
pp. 283-288 ◽  
Author(s):  
Marcelo Coelho Goiato ◽  
Aldiéris Alves Pesqueira ◽  
Rosse Mary Falcón-Antenucci ◽  
Daniela Micheline dos Santos ◽  
Marcela Filié Haddad ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Implant Abutment

scholarly journals A Finite Element Analysis on Stress Distribution in Overdenture Implants and Implant Abutment Interface Using Different Attachment Systems: An In Vitro Study

2020 ◽  
Vol 08 (01) ◽  
pp. 22-31
Author(s):  
Aquib Javaid ◽  
Tarun Kalra ◽  
Manjit Kumar ◽  
Ajay Bansal ◽  
Udey Singh Wirring
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Load Transfer ◽  
Low Cost ◽  
In Vitro Study ◽  
Element Analysis ◽  
Implant Abutment ◽  
Maxilla And Mandible

Abstract Introduction The overdenture is an alternative to fixed implant-supported prosthesis for its relatively low-cost and in clinical cases where it is impossible to place multiple implants with appropriate number and arrangement in the arch to support a fixed prosthesis. In implant-supported overdentures, many attachments such as bars, ball, and magnets can be used. The anchorage system affects the retention and stability of the overdenture as well as the load transfer to the implant and the bone. The purpose of this study was to evaluate the exerted stresses on implants and implant–abutment interface by comparing different attachment systems used for implant-supported maxillary and mandibular overdentures using finite-element analysis. Materials and Methods Stress distribution in five different models with different attachments were evaluated using finite-element analysis. The studied attachment systems were Ball/O-ring and bar-clip attachments. Three models in mandible were studied, two implants with ball attachments, two implants with bar, and four implants connected with a bar. In maxilla, two models were studied, four implants with ball attachments, and four implants connected with bar. Forces were applied bilaterally on each model in the canine and molar region separately. The forces applied were 35N axially, 70N obliquely, and 10N horizontally. Results The ball attachments models showed the highest amount of stresses on the bone and on the implants in maxilla and mandible. The bar-clip attachment with four implants showed least stress in maxilla as well as in the mandible. The bar on four implants has better stress distribution as compared with the bar on the two implants.

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