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Type: Artigo
Title: Retention And Mechanical Behavior Of Attachment Systems For Implant-retained Auricular Prostheses
Author: Sigua-Rodriguez
Eder Alberto; Goulart
Douglas Rangel; Santos
Zarina Tatia; Alvarez-Pinzon
Natalia; Olate
Sergio; de Albergaria-Barbosa
Jose Ricardo
Abstract: Auricular prostheses are artificial substitutes for facial defects. The retention of these has often been a problem. This study aimed to evaluate the mechanical behavior of 3 retained auricular prosthetic connections when submitted to a mechanical cycling test. Materials and Methods: Twelve samples with installed implants were obtained and divided into 3 groups according to their retention system with 4 samples in each group. I: bar-clip system; II: magnet system; and III: ball/o-ring system. Each of samples was submitted to the pull-out test during 3240 cycles (f = 0.5 Hz) to determine its tensile strength. The mechanical cycling test was performed using the servo-hydraulic machine MTS 810-Flex Test 40 (Eden Prairie, MN) that had a 2.5mm shift at a 10 mm/s velocity. The retaining strength for each of the samples was obtained at 7 intervals. Results: The tensile strength for the group retained by the bar-clip system (29.60 N) was higher with statistically significant difference (P < 0.05) when compared with the group retained by the ball/o-ring system (9.41 N) and magnets system (8.61 N) for all periods assessed. The ball/o-ring system showed loss of retention during the fatigue test (Kruskal-Wallis, chi-squared = 17.28; P < 0.01). Conclusions: The evaluated systems showed a tensile strength compatible with the clinical use and no fractures of the components were observed.
Subject: Maxillofacial Prosthesis
Prosthesis Retention
Tensile Strength
Editor: Lippincott Williams & Wilkins
Rights: fechado
Identifier DOI: 10.1097/SCS.0000000000003269
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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