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Type: Artigo de periódico
Title: The Influence Of Bone Quality On The Biomechanical Behavior Of Full-arch Implant-supported Fixed Prostheses.
Author: Faverani, Leonardo Perez
Barão, Valentim Adelino Ricardo
Ramalho-Ferreira, Gabriel
Delben, Juliana Aparecida
Ferreira, Mayara Barbosa
Garcia Júnior, Idelmo Rangel
Assunção, Wirley Gonçalves
Abstract: We evaluated the influence of bone tissue type on stress distribution in full-arch implant-supported fixed prostheses using a three-dimensional finite element analysis. Stresses in cortical and trabecular bones were also investigated. Edentulous mandible models with four implants inserted into the interforaminal region were constructed from different bone types: type 1 - compact bone; type 2 - compact bone surrounding dense trabecular bone; type 3 - a thin layer of compact bone surrounding trabecular bone; and type 4 - low-quality trabecular bone. The mandible was restored with a full-arch implant-supported fixed prosthesis. A 100-N oblique load was applied to the left lower first molar of the prosthesis. The maximum (σmax) and minimum (σmin) principal stress values were determined. The σmax in the type 4 cortical bone was 22.56% higher than that in the type 1 bone. The σmin values in the cortical bone were similar among all the bone types. For the superstructure, increases of 9.04% in the σmax and 11.74% in the σmin in G4 (type 4 bone) compared with G1 (type 1 bone) were observed. For the implants, the highest stress values were located in G4, and the lowest values were observed in G1. In the trabecular bone, the highest stress was generated in G1 and G2. In conclusion, the more compact bones (types 1 and 2) are the most suitable for supporting full-arch implant-supported fixed prostheses, and poor bone quality may increase the risk of biological and mechanical failure.
Subject: Bone And Bones
Dental Implants
Elastic Modulus
Finite Element Analysis
Jaw, Edentulous
Middle Aged
Stress, Mechanical
Tomography, X-ray Computed
Dental Implants
Finite Element Analysis
Prostheses And Implants
Citation: Materials Science & Engineering. C, Materials For Biological Applications. v. 37, p. 164-70, 2014-Apr.
Rights: fechado
Identifier DOI: 10.1016/j.msec.2014.01.013
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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