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Type: Artigo
Title: The effect of casting and masticatory simulation on strain and misfit of implant-supported metal frameworks
Author: Bhering, Cláudia Lopes Brilhante
Marques, Isabella da Silva Vieira
Takahashi, Jessica Mie Ferreira Koyama
Barão, Valentim Adelino Ricardo
Rafael Consani, Leonardo Xediek
Mesquita, Marcelo Ferraz
Abstract: The influence of casting and masticatory simulation on marginal misfit and strain in multiple implant-supported prostheses was evaluated. Three-unit screw retained fixed dental prosthesis (FDP) and screw retained full-arch fixed dental prosthesis (FAFDP) frameworks were made using calcinable or overcasted cylinders on conical dental implant abutment. Four groups were obtained according to the cylinder and prosthesis type (n = 10). Frameworks were casted in CoCr alloy and subjected to strain gauge analyses and marginal misfit measurements before and after 106 mechanical cycles (2 Hz/280 N). Results were submitted to ANOVA, Tukey's HSD and Pearson correlation test (α = 0.05). No difference was found on misfit among all groups and times (p > 0.05). Overcasted frameworks showed higher strain than the calcinable ones (FDP — Initial p = 0.0047; Final p = 0.0004; FAFDP — Initial p = 0.0476; Final p = 0.0115). The masticatory simulation did not influence strain (p > 0.05). No correlation was observed between strain and misfit (r = 0.24; p > 0.05). In conclusion, the marginal misfit value in the overcasted full-arch frameworks was higher than clinical acceptable data. It proved that overcasted method is not an ideal method for full-arch prosthesis. Overcasted frameworks generate higher strain upon the system. The masticatory simulation had no influence on misfit and strain of multiple prostheses.
Subject: Mastigação
Implantes dentários
Análise do estresse dentário
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.msec.2016.02.035
Date Issue: 2016
Appears in Collections:FOP - Artigos e Outros Documentos

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