The role of superstructure material on the stress distribution in mandibular full-arch implant-supported fixed dentures. A CT-based 3D-FEA

Autor(es)

Ferreira, Mayara Barbosa ^[1] ; Bardo, Valentim Adelino ^[2] ; Faverani, Leonardo Perez ^[1] ; Hipolito, Ana Carolina ^[1] ; Assuncao, Wirley Goncalves ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, BR-16015050 Aracatuba, SP - Brazil

^[2] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Science & Engineering C-Materials for Biological Applications; v. 35, p. 92-99, FEB 1 2014.
• Citações Web of Science: 11

Resumo

This study evaluated the stress distribution in mandibular full-arch implant-supported fixed dentures with different veneering and metallic infrastructure materials, using three-dimensional finite element analysis. Ten models were obtained from an edentulous human mandible with a complete denture fixed by four implants. Acrylic resin (RES) and porcelain (POR) teeth were associated with infrastructures of titanium (Ti), gold (Au), silver-palladium (AgPd), chrome-cobalt (CoCr) and nickel-chrome (NiCr). A 100-N oblique was applied. The von Mises (sigma vM) and maximum (sigma max) and minimum (sigma min) principal stresses were obtained. The RES-AgPd group showed the lowest sigma vM values, while the RES-Ni-Cr group showed the highest. In the bone tissue, the RES-Au group was the only one that showed different sigma max values with a 12% increase in comparison to the other groups which had similar stress values. In the implants, the groups with Ti, Au and AgPd infrastructures, either with porcelain or resin teeth, showed sigma vM values similar and lower in comparison to the groups with CoCr and NiCr infrastructures. The tooth veneering material influenced the stress values in metallic infrastructures, in which the acrylic resin had the highest values. The veneering and infrastructure materials have influence on stress values of implant-supported dentures, except for the peri-implant bone tissue. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/09857-3 - Comparação da distribuição de tensões em diferentes próteses fixas implanto-suportadas mandibulares do tipo protocolo para carregamento imediato: análise não linear por meio do MEF-3D baseado em tomografia computadorizada
• Beneficiário: Wirley Goncalves Assuncao
• Modalidade de apoio: Auxílio à Pesquisa - Regular