Journal article
Overdenture retaining bar stress distribution: A finite-element analysis
Acta odontologica Scandinavica, Vol.73(4), pp.274-279
05/01/2015
DOI: 10.3109/00016357.2014.923111
PMID: 25645607
Abstract
AbstractObjective. Evaluate the stress distribution on the peri-implant bone tissue and prosthetic components of bar-clip retaining systems for overdentures presenting different implant inclinations, vertical misfit and framework material. Materials and methods. Three-dimensional models of a jaw and an overdenture retained by two implants and a bar-clip attachment were modeled using specific software (SolidWorks 2010). The studied variables were: latero-lateral inclination of one implant (-10°, -5°, 0°, +5°, +10°); vertical misfit on the other implant (50, 100, 200 µm); and framework material (Au type IV, Ag-Pd, Ti cp, Co-Cr). Solid models were imported into mechanical simulation software (ANSYS Workbench 11). All nodes on the bone's external surface were constrained and a displacement was applied to simulate the settling of the framework on the ill-fitted component. Von Mises stress for the prosthetic components and maximum principal stress to the bone tissue were evaluated. Results. The +10° inclination presented the worst biomechanical behavior, promoting the highest stress values on the bar framework and peri-implant bone tissue. The -5° group presented the lowest stress values on the prosthetic components and the lowest stress value on peri-implant bone tissue was observed in -10°. Increased vertical misfit caused an increase on the stress values in all evaluated structures. Stiffer framework materials caused a considerable stress increase in the framework itself, prosthetic screw of the fitted component and peri-implant bone tissue. Conclusions. Inclination of one implant associated with vertical misfit caused a relevant effect on the stress distribution in bar-clip retained overdentures. Different framework materials promoted increased levels of stress in all the evaluated structures.
Details
- Title: Subtitle
- Overdenture retaining bar stress distribution: A finite-element analysis
- Creators
- Conrado Reinoldes Caetano - Aurora Periodontics and Implant DentistryMarcelo Ferraz Mesquita - Aurora Periodontics and Implant DentistryRafael Leonardo Xediek Consani - Aurora Periodontics and Implant DentistryLourenço Correr-Sobrinho - Universidade Estadual de Campinas (UNICAMP)Mateus Bertolini Fernandes Dos Santos - Universidade Federal de Pelotas
- Resource Type
- Journal article
- Publication Details
- Acta odontologica Scandinavica, Vol.73(4), pp.274-279
- DOI
- 10.3109/00016357.2014.923111
- PMID
- 25645607
- NLM abbreviation
- Acta Odontol Scand
- ISSN
- 0001-6357
- eISSN
- 1502-3850
- Publisher
- Informa Healthcare
- Number of pages
- 6
- Language
- English
- Date published
- 05/01/2015
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984946629002771
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