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Type: Artigo de periódico
Title: Photoelastic Analysis Of All-on-four Concept Using Different Implants Angulations For Maxilla.
Author: Cidade, Castelo Pedro Vemba
Pimentel, Marcele Jardim
Amaral, Regiane Cristina do
Nóbilo, Mauro Antonio de Arruda
Barbosa, José Ricardo de Albergaria
Abstract: Conventional tilted implants are used in oral rehabilitation for heavily absorbed maxilla to avoid bone grafts; however, few research studies evaluate the biomechanical behavior when different angulations of the implants are used. The aim of this study was evaluate, trough photoelastic method, two different angulations and length of the cantilever in fixed implant-supported maxillary complete dentures. Two groups were evaluated: G15 (distal tilted implants 15°) and G35 (distal tilted implants 35°) n = 6. For each model, 2 distal tilted implants (3.5 x 15 mm long cylindrical cone) and 2 parallel tilted implants in the anterior region (3.5 x 10 mm) were installed. Photoelastic models were submitted to three vertical load tests: in the end of cantilever, in the last pillar and in the all pillars at the same time. We obtained the shear stress by Fringes software and found values for total, cervical and apical stress. The quantitative analysis was performed using the Student tests and Mann-Whitney test; p ≥ 0.05. There is no difference between G15 and G35 for total stress regardless of load type. Analyzing the apical region, G35 reduced strain values considering the distal loads (in the cantilever p = 0.03 and in the last pillar p = 0.02), without increasing the stress level in the cervical region. Considering the load in all pillars, G35 showed higher stress concentration in the cervical region (p = 0.04). For distal loads, G15 showed increase of tension in the apical region, while for load in all pillars, G35 inclination increases stress values in the cervical region.
Subject: Dental Implants
Dental Prosthesis, Implant-supported
Dental Stress Analysis
Denture Design
Denture, Complete, Upper
Elastic Modulus
Materials Testing
Models, Biological
Reference Values
Shear Strength
Statistics, Nonparametric
Stress, Mechanical
Time Factors
Rights: aberto
Identifier DOI: 
Date Issue: -1-Uns- -1
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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