Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/320101
Type: Artigo de Periódico
Title: The Role Of Prosthetic Abutment Material On The Stress Distribution In A Maxillary Single Implant-supported Fixed Prosthesis
Author: Peixoto
HE; Bordin
D; Cury
AAD; da Silva
WJ; Faot
F
Abstract: Evaluate the influence of abutment's material and geometry on stress distribution in a single implant supported prosthesis. Materials and Methods: Three-dimensional models were made based on tomographic slices of the upper middle incisor area, in which a morse taper implant was positioned and a titanium (Ti) or zirconia (ZrN) universal abutments was installed. The commercially available geometry of titanium (T) and zirconia (Z) abutments were used to draw two models, TM1 and ZM1 respectively, which served as control groups. These models were compared with 2 experimental groups were the mechanical properties of Z were applied to the titanium abutment (TM2) and vice versa for the zirconia abutment (ZM2). Subsequently, loading was simulated in two steps, starting with a preload phase, calculated with the respective friction coefficients of each materials, followed by a combined preload and chewing force. The maximum von Mises stress was described. Data were analyzed by two-way ANOVA that considered material composition, geometry and loading (p < 0.05). Results: Titanium and zirconia abutments showed similar von Mises stresses in the mechanical part of the four models. The area with the highest concentration of stress was the screw thread, following by the screw body. The highest stress levels occurred in screw thread was observed during the preloading phase in the ZM1 model (931 MPa); and during the combined loading in the TM1 model (965 MPa). Statistically significant differences were observed for loading, the material x loading interaction, and the loading x geometry interaction (p < 0.05). Preloading contributed for 77.89% of the stress (p < 0.05). There were no statistically significant differences to the other factors (p > 0.05). Conclusion: The screw was the piece most intensely affected, mainly through the preload force, independent of the abutment's material. (C) 2016 Elsevier B.V. All rights reserved.
Subject: Dental Implants
Dental Implant-abutment Design
Finite Element Analysis
Titanium
Zirconia
Editor: ELSEVIER SCIENCE BV
Rights: fechado
Identifier DOI: 10.1016/j.msec.2016.04.004
Address: http://www-sciencedirect-com.ez88.periodicos.capes.gov.br/science/article/pii/S0928493116303058
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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