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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The substitution of the implant and abutment for their analogs in mechanical studies: In vitro and in silico analysis

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Author(s):
Gomes, Rafael Soares ; Pedroso Bergamo, Edmara Tatiely ; Bordin, Dimorvan ; Del Bel Cury, Altair Antoninha
Total Authors: 4
Document type: Journal article
Source: Materials Science & Engineering C-Materials for Biological Applications; v. 75, p. 50-54, JUN 1 2017.
Web of Science Citations: 3
Abstract

The use of analogs could reduce the cost of mechanical tests involving implant-supported crowns, but it is unclear if it would negatively affect the data accuracy. This study evaluated the substitution of the implant by implants analogs or abutment analogs as a support for crowns in mechanical tests, taking into account stress distribution and fracture load of monolithic lithium disilicate crowns. Thirty lithium disilicate monolithic crowns were randomized into three groups according to the set: Implant + abutment (IA); implant analog + abutment (IAA); abutment analog (AA). The specimens were subjected to mechanical fatigue (10(6) cycles, 200 N, 2 Hz) and thermal fatigue (10(4) cycles, 5 degrees-55 degrees C). A final compression load was applied and the maximum fracture load was recorded. Data were analyzed using one-way ANOVA (alpha = 0.05). The experiment was validated by finite element analysis and the maximum principal stress was recorded. No statistically significant difference was observed in the mean fracture load among groups (P>0.05). The failure mode was similar for all groups with the origin of crack propagation located at the load point application. Finite element analysis showed similar stress distribution and stress peak values for all groups. The use of implant's or abutment's analog does not influence the fracture load and stress distribution for cemented implant-supported crowns. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/23358-0 - Stress distribuition, adaptation and compressive strength of monolithic crowns after thermomechanical loading in different materials
Grantee:Rafael Soares Gomes
Support Opportunities: Scholarships in Brazil - Master