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The International Journal of Prosthodontics
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Int J Prosthodont 22 (2009), No. 3     15. May 2009
Int J Prosthodont 22 (2009), No. 3  (15.05.2009)

Page 283-286, PubMed:19548411


Short Communication: Fracture Resistance of the Implant-Abutment Connection in Implants with Internal Hex and Internal Conical Connections Under Oblique Compressive Loading: An In Vitro Study
Coppedê, Abílio Ricciardi / Bersani, Edmilson / Mattos, Maria da Gloria Chiarello de / Rodrigues, Renata Cristina Silveira / Sartori, Ivete Aparecida de Mattias / Ribeiro, Ricardo Faria
The objective of this study was to verify if differences in the design of internal hex (IH) and internal conical (IC) connection implant systems influence fracture resistance under oblique compressive forces. Twenty implant-abutment assemblies were utilized: 10 with IH connections and 10 with IC connections. Maximum deformation force for IC implants (90.58 ± 6.72 kgf) was statistically higher than that for IH implants (83.73 ± 4.94 kgf) (P = .0182). Fracture force for the IH implants was 79.86 ± 4.77 kgf. None of the IC implants fractured. The friction-locking mechanics and the solid design of the IC abutments provided greater resistance to deformation and fracture under oblique compressive loading when compared to the IH abutments.