Biomechanical influence of crown-to-implant ratio on stress distribution over internal hexagon short implant: 3-D finite element analysis with statistical test

Autor(es)

Verri, Fellippo Ramos ; Santiago Junior, Joel Ferreira ; de Faria Almeida, Daniel Augusto ; Brandao de Oliveira, Guilherme Bergamo ; de Souza Batista, Victor Eduardo ; Honorio, Heitor Marques ; Noritomi, Pedro Yoshito ; Pellizzer, Eduardo Piza

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF BIOMECHANICS; v. 48, n. 1, p. 138-145, JAN 2 2015.
• Citações Web of Science: 27

Resumo

The study of short implants is relevant to the biomechanics of dental implants, and research on crown increase has implications for the daily clinic. The aim of this study was to analyze the biomechanical interactions of a singular implant-supported prosthesis of different crown heights under vertical and oblique force, using the 3-D finite element method. Six 3-D models were designed with Invesalius 3.0, Rhinoceros 3D 4.0, and Solidworks 2010 software. Each model was constructed with a mandibular segment of bone block, including an implant supporting a screwed metal-ceramic crown. The crown height was set at 10, 12.5, and 15 mm. The applied force was 200 N (axial) and 100 N (oblique). We performed an ANOVA statistical test and Tukey tests; p < 0.05 was considered statistically significant. The increase of crown height did not influence the stress distribution on screw prosthetic (p > 0.05) under axial load. However, crown heights of 12.5 and 15 mm caused statistically significant damage to the stress distribution of screws and to the cortical bone (p <0.001) under oblique load. High crown to implant (C/I) ratio harmed microstrain distribution on bone tissue under axial and oblique loads (p < 0.001). Crown increase was a possible deleterious factor to the screws and to the different regions of bone tissue. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 09/16164-7 - Influência da proporço coroa/implante, do tipo de conexo protética e dos diferentes diâmetros do implante na distribuiço das tensões, em restaurações unitárias implantossuportadas: estudo pelo método dos elementos finitos tridimensionais
• Beneficiário: Eduardo Piza Pellizzer
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/06797-2 - Avaliação das tensões em próteses unitárias sobre implante com diferentes alturas de coroas. Estudo pelo método dos elementos finitos tridimensionais
• Beneficiário: Guilherme Bergamo Brandão de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica