Effect of implant diameter on reliability and failure modes of molar crowns

Amilcar C. Freitas-Junior, Estevam A. Bonfante, Leandro M. Martins, Nelson R F A Silva, Leonard Marotta, Paulo G. Coelho

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Abstract

The reliability and failure modes of molar crowns supported by three different implant-supported designs were tested according to the following groups: group 1, one standard-diameter implant (3.75 mm); group 2, one narrow-diameter implant (3 mm); and group 3, two narrow-diameter implants (3 mm). Loads were applied as mouth-motion cycles using a step-stress accelerated life-testing method. β values for groups 1 and 3 (1.57 and 2.48, respectively) indicated that fatigue accelerated the failure of both groups, but not for group 2 (0.39). Abutment screw failure was the chief failure mode. Strength and reliability were significantly higher for groups 1 and 3 compared to group 2.

Original languageEnglish (US)
Pages (from-to)557-561
Number of pages5
JournalInternational Journal of Prosthodontics
Volume24
Issue number6
StatePublished - Jan 1 2011

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ASJC Scopus subject areas

  • Oral Surgery

Cite this

Freitas-Junior, A. C., Bonfante, E. A., Martins, L. M., Silva, N. R. F. A., Marotta, L., & Coelho, P. G. (2011). Effect of implant diameter on reliability and failure modes of molar crowns. International Journal of Prosthodontics, 24(6), 557-561.