Retention and Mechanical Behavior of Attachment Systems for Implant-Retained Auricular Prostheses.
J Craniofac Surg
; 28(1): 134-138, 2017 Jan.
Article
em En
| MEDLINE
| ID: mdl-27922962
OBJECTIVE: 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 (fâ=â0.5âHz) 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 2.5âmm shift at a 10âmm/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 (29.60âN) was higher with statistically significant difference (Pâ<â0.05) when compared with the group retained by the ball/o-ring system (9.41âN) 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-squaredâ=â17.28; Pâ<â0.01). CONCLUSIONS: The evaluated systems showed a tensile strength compatible with the clinical use and no fractures of the components were observed.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Próteses e Implantes
/
Desenho de Prótese
/
Orelha Externa
/
Retenção da Prótese
/
Interface Osso-Implante
Limite:
Humans
Idioma:
En
Revista:
J Craniofac Surg
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Chile
País de publicação:
Estados Unidos