Journal article
Effects of horizontal misfit and bar framework material on the stress distribution of an overdenture-retaining bar system: a 3D finite element analysis
Journal of prosthodontics, Vol.20(7), pp.517-522
10/2011
DOI: 10.1111/j.1532-849X.2011.00759.x
PMID: 21973281
Abstract
To evaluate the influence of horizontal misfit change and bar framework material on the distribution of static stresses in an overdenture-retaining bar system using finite element (FE) analysis.
A 3D FE model was created including two titanium implants and a bar framework placed in the anterior part of a severely resorbed jaw. The model set was exported to mechanical simulation software, where horizontal displacement (10, 50, 100, and 200 μm) was applied simulating the settling of the framework, which suffered shrinkage during laboratory procedures. Four bar materials (gold alloy, silver-palladium alloy, commercially pure titanium, and cobalt-chromium alloy) were also simulated in the analysis using 50 μm as the horizontal misfit. Data were qualitatively evaluated using von Mises stress, given by the software.
The misfit amplification presented a great increase in the stress levels in the inferior region of the bar, screw-retaining neck, cervical and medium third of the implant, and cortical bone tissue surrounding the implant. The higher stiffness of the bar presented a considerable increase in the stress levels in the bar framework only.
The levels of static stresses seem to be closely linked with horizontal misfit, such that its amplification caused increased levels of stress in the structures of the overdenture-retaining bar system. On the other hand, the stiffness of the bar framework presented a lower effect on the static stress levels.
Details
- Title: Subtitle
- Effects of horizontal misfit and bar framework material on the stress distribution of an overdenture-retaining bar system: a 3D finite element analysis
- Creators
- Aloísio O Spazzin - Atitus EducaçãoMateus Bertolini Fernandes Dos Santos - Universidade Estadual de Campinas (UNICAMP)Lourenço Correr Sobrinho - Universidade Estadual de Campinas (UNICAMP)Rafael Leonardo X Consani - Universidade Estadual de Campinas (UNICAMP)Marcelo F Mesquita - Universidade Estadual de Campinas (UNICAMP)
- Resource Type
- Journal article
- Publication Details
- Journal of prosthodontics, Vol.20(7), pp.517-522
- DOI
- 10.1111/j.1532-849X.2011.00759.x
- PMID
- 21973281
- NLM abbreviation
- J Prosthodont
- ISSN
- 1059-941X
- eISSN
- 1532-849X
- Language
- English
- Date published
- 10/2011
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984946625002771
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