USING FATIGUE ANALYSES FROM FEA TO STUDY THE BIOMECHANICS F RESTORED TEETH WITH INTRARADICULAR POSTS

摘要

Dental restorations using intraradicular posts arerncommonly used nowadays, but still present a high failurernrate after several years of service. There is a high interestrnon looking for a post design that minimizes the failurernprobability of the restoration under the masticatory loadsrnthat the tooth has to bear. These forces have a dynamicrnnature that should be taken into account. Both dentists andrnmechanical engineers have been trying to investigate therneffect of the different parameters defining the post designrn(material, shape and dimensions), but not a definitivernwork exists presenting a systematic study of theirrninfluence. This goal is not feasible by using only in-vitrorntests, and needs for the use of biomechanical models. Inrnthis work, the use of a biomechanical model including arnfatigue analysis from FEA is presented as an easy andrnpowerful method to study the effect of the differentrnparameters defining the intraradicular post design. Therninclusion of the fatigue analysis allows for a morernrealistic study that accounts for the dynamic nature ofrnmasticatory loads, and, at the same time, the resultsrnobtained are easier to interpret by others than mechanicalrnengineers.