Comput Methods Programs Biomed - Life prediction of different commercial dental implants as influence by uncertainties in their fatigue material properties and loading conditions.

Tópicos

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Resumo

Probabilistic analyses allow the effect of uncertainty in system parameters to be determined. In the literature, many researchers have investigated static loading effects on dental implants. However, the intrinsic variability and uncertainty of most of the main problem parameters are not accounted for. The objective of this research was to apply a probabilistic computational approach to predict the fatigue life of three different commercial dental implants considering the variability and uncertainty in their fatigue material properties and loading conditions. For one of the commercial dental implants, the influence of its diameter in the fatigue life performance was also studied. This stochastic technique was based on the combination of a probabilistic finite element method (PFEM) and a cumulative damage approach known as B-model. After 6 million of loading cycles, local failure probabilities of 0.3, 0.4 and 0.91 were predicted for the Lifecore, Avinent and GMI implants, respectively (diameter of 3.75mm). The influence of the diameter for the GMI implant was studied and the results predicted a local failure probability of 0.91 and 0.1 for the 3.75mm and 5mm, respectively. In all cases the highest failure probability was located at the upper screw-threads. Therefore, the probabilistic methodology proposed herein may be a useful tool for performing a qualitative comparison between different commercial dental implants.

Resumo Limpo

probabilist analys allow effect uncertainti system paramet determin literatur mani research investig static load effect dental implant howev intrins variabl uncertainti main problem paramet account object research appli probabilist comput approach predict fatigu life three differ commerci dental implant consid variabl uncertainti fatigu materi properti load condit one commerci dental implant influenc diamet fatigu life perform also studi stochast techniqu base combin probabilist finit element method pfem cumul damag approach known bmodel million load cycl local failur probabl predict lifecor avin gmi implant respect diamet mm influenc diamet gmi implant studi result predict local failur probabl mm mm respect case highest failur probabl locat upper screwthread therefor probabilist methodolog propos herein may use tool perform qualit comparison differ commerci dental implant

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