Implant dentistry · 2013
Effect of crown to implant ratio and implant dimensions on periimplant stress of splinted implant-supported crowns: a finite element analysis.
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Bayraktar Mehmet, Gultekin B Alper, Yalcin Serdar, Mijiritsky Eitan
Аннотация
PURPOSE: To assess the influence of different crown-implant (C/I) ratios and implant dimensions on periimplant stress in the partially edentulous posterior mandible by 3-dimensional finite element analysis (FEA).
MATERIALS AND METHODS: Two implants were placed in the second premolar and first molar regions of the mandibular model. The implants were then splinted with a 2-unit fixed bridge. The influence of 3 parameters (C/I ratio, implant length, and implant diameter) on periimplant bone stress was then analyzed by using FEA.
RESULTS: C/I ratios showed a direct relationship with periimplant bone stress, but the absolute height of the clinical crown had a much more significant influence. The implant length had less influence on the periimplant bone stress than the implant diameter. Lower stress values were detected in wide-diameter implants, even in scenarios involving long crowns.
CONCLUSIONS: Crown height is a more important factor affecting the periimplant bone stress than the C/I ratio for splinted implant-supported crowns. Two-unit fixed restorations with high C/I ratios may be successfully used with wide-diameter implants in the posterior mandible.
MATERIALS AND METHODS: Two implants were placed in the second premolar and first molar regions of the mandibular model. The implants were then splinted with a 2-unit fixed bridge. The influence of 3 parameters (C/I ratio, implant length, and implant diameter) on periimplant bone stress was then analyzed by using FEA.
RESULTS: C/I ratios showed a direct relationship with periimplant bone stress, but the absolute height of the clinical crown had a much more significant influence. The implant length had less influence on the periimplant bone stress than the implant diameter. Lower stress values were detected in wide-diameter implants, even in scenarios involving long crowns.
CONCLUSIONS: Crown height is a more important factor affecting the periimplant bone stress than the C/I ratio for splinted implant-supported crowns. Two-unit fixed restorations with high C/I ratios may be successfully used with wide-diameter implants in the posterior mandible.
Предметные рубрики MeSH
Aluminum SilicatesBicuspidBiomechanical PhenomenaChromium AlloysComputer SimulationCrownsDental Implant-Abutment DesignDental ImplantsDental PorcelainDental Prosthesis DesignDental Prosthesis, Implant-SupportedDenture, Partial, FixedElastic ModulusFinite Element AnalysisHumansImage Processing, Computer-AssistedImaging, Three-DimensionalJaw, Edentulous, PartiallyMandibleModels, BiologicalMolarPotassium CompoundsStress, MechanicalSurface Properties