Fracture resistance of the implant-abutment connection in implants with internal hex and internal conical connections under oblique compressive loading: an in vitro study.
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.
Coppedê
Abílio Ricciardi
AR
Department of Dental Materials and Prosthodontics, Dental School of Ribeirão, University of São Paulo, Ribeirão Preto, SP, Brazil.
Bersani
Edmilson
E
de Mattos
Maria da Gloria Chiarello
Mda G
Rodrigues
Renata Cristina Silveira
RC
Sartori
Ivete Aparecida de Mattias
IA
Ribeiro
Ricardo Faria
RF
D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000295:instrumentation; D017276:Friction; D006801:Humans; D008422:Materials Testing; D013314:Stress, Mechanical; D013499:Surface Properties
D015921:Dental Implants