Fatigue reliability of 3 single-unit implant-abutment designs.
Implant Dent
; 21(1): 67-71, 2012 Feb.
Article
em En
| MEDLINE
| ID: mdl-22228459
OBJECTIVES: Because the mechanical behavior of the implant-abutment system is critical for the longevity of implant-supported reconstructions, this study evaluated the fatigue reliability of different implant-abutment systems used as single-unit crowns and their failure modes. METHODS AND MATERIALS: Sixty-three Ti-6Al-4V implants were divided in 3 groups: Replace Select (RS); IC-IMP Osseotite; and Unitite were restored with their respective abutments. Anatomically correct central incisor metal crowns were cemented and subjected to separate single load to failure tests and step-stress accelerated life testing (n = 18). A master Weibull curve and reliability for a mission of 50,000 cycles at 200 N were calculated. Polarized-light and scanning electron microscopes were used for failure analyses. RESULTS: The load at failure mean values during step-stress accelerated life testing were 348.14 N for RS, 324.07 N for Osseotite, and 321.29 N for the Unitite systems. No differences in reliability levels were detected between systems, and only the RS system mechanical failures were shown to be accelerated by damage accumulation. Failure modes differed between systems. CONCLUSIONS: The 3 evaluated systems did not present significantly different reliability; however, failure modes were different.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dente Suporte
/
Prótese Dentária Fixada por Implante
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Implantes Dentários para Um Único Dente
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Coroas
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Análise do Estresse Dentário
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Projeto do Implante Dentário-Pivô
Idioma:
En
Revista:
Implant Dent
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Estados Unidos