Comput Math Methods Med - Comparative evaluation of osseointegrated dental implants based on platform-switching concept: influence of diameter, length, thread shape, and in-bone positioning depth on stress-based performance.

Tópicos

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Resumo

This study aimed to investigate the influence of implant design (in terms of diameter, length, and thread shape), in-bone positioning depth, and bone posthealing crestal morphology on load transfer mechanisms of osseointegrated dental implants based on platform-switching concept. In order to perform an effective multiparametric comparative analysis, 11 implants different in dimensions and in thread features were analyzed by a linearly elastic 3-dimensional finite element approach, under a static load. Implant models were integrated with the detailed model of a maxillary premolar bone segment. Different implant in-bone positioning levels were modeled, considering also different posthealing crestal bone morphologies. Bone overloading risk was quantified by introducing proper local stress measures, highlighting that implant diameter is a more effective design parameter than the implant length, as well as that thread shape and thread details can significantly affect stresses at peri-implant bone, especially for short implants. Numerical simulations revealed that the optimal in-bone positioning depth results from the balance of 2 counteracting effects: cratering phenomena and bone apposition induced by platform-switching configuration. Proposed results contribute to identify the mutual influence of a number of factors affecting the bone-implant loading transfer mechanisms, furnishing useful insights and indications for choosing and/or designing threaded osseointegrated implants.

Resumo Limpo

studi aim investig influenc implant design term diamet length thread shape inbon posit depth bone postheal crestal morpholog load transfer mechan osseointegr dental implant base platformswitch concept order perform effect multiparametr compar analysi implant differ dimens thread featur analyz linear elast dimension finit element approach static load implant model integr detail model maxillari premolar bone segment differ implant inbon posit level model consid also differ postheal crestal bone morpholog bone overload risk quantifi introduc proper local stress measur highlight implant diamet effect design paramet implant length well thread shape thread detail can signific affect stress periimpl bone especi short implant numer simul reveal optim inbon posit depth result balanc counteract effect crater phenomena bone apposit induc platformswitch configur propos result contribut identifi mutual influenc number factor affect boneimpl load transfer mechan furnish use insight indic choos andor design thread osseointegr implant

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