Effect of different types of prosthetic platforms on stress-distribution in dental implant-supported prostheses

Autor(es)

Minatel, Lurian ; Verri, Fellippo Ramos ; Kudo, Guilherme Abu Halawa ; de Faria Almeida, Daniel Augusto ; de Souza Batista, Victor Eduardo ; Araujo Lemos, Cleidiel Aparecido ; Pellizzer, Eduardo Piza ; Santiago Junior, Joel Ferreira

• Tipo de documento: Artigo Científico
• Fonte: Materials Science & Engineering C-Materials for Biological Applications; v. 71, p. 35-42, FEB 1 2017.
• Citações Web of Science: 12

Resumo

A biomechanical analysis of different types of implant connections is relevant to clinical practice because it may impact the longevity of the rehabilitation treatment. Therefore, the objective of this study is to evaluate the Morse taper connections and the stress distribution of structures associated with the platform switching (PSW) concept. It will do this by obtaining data on the biomechanical behavior of the main structure in relation to the dental implant using the 3-dimensional finite element methodology. Four models were simulated (with each containing a single prosthesis over the implant) in the molar region, with the following specifications: M1 and M2 is an external hexagonal implant on a regular platform; M3 is an external hexagonal implant using PSW,concept; and M4 is a Morse taper implant. The modeling process involved the use of images from InVesalius CT (computed tomography) processing software, which were refined using Rhinoceros 4.0 and SolidWorks 2011 CAD software. The models were then exported into the finite element program (FEMAP 11.0) to configure the meshes. The models were processed using NeiNastram software. The main results are that M1 (regular diameter 4 mm) had the highest stress concentration area and highest microstrain concentration for bone tissue, dental implants, and the retaining screw (P < 0.05). Using the PSW concept increases the area of the stress concentrations in the retaining screw (P < 0.05) more than in the regular platform implant. It was concluded that the increase in diameter is beneficial for stress distribution and that the PSW concept had higher stress concentrations in the retaining screw and the crown compared to the regular platform implant. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 15/09073-6 - Efeito da distribuição de tensões em próteses implantossuportadas com diferentes tipos de plataformas de conexão
• Beneficiário: Lurian Minatel
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/20827-2 - Efeito da qualidade óssea e tipo de conexão de implantes osseointegráveis na distribuição de tensões
• Beneficiário: Joel Ferreira Santiago Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/15734-1 - Influência de diferentes superfícies de implantes osseointegrados unitários com geometria do tipo Hexágono Externo, Platform Switching e Cone - Morse em osso tipo III e IV. Estudo pelo método dos elementos finitos tridimensionais.
• Beneficiário: Joel Ferreira Santiago Junior
• Modalidade de apoio: Bolsas no Brasil - Doutorado