title: Mechanical performance of endodontic restorations with prefabricated posts: sensitivity analysis of parameters with a 3D finite element model.
abstract: Many studies have investigated the effect of different parameters of the endodontically restored tooth on its final strength, using in vitro tests and model simulations. However, the differences in the experimental set-up or modelling conditions and the limited number of parameters studied in each case prevent us from obtaining clear conclusions about the relative importance of each parameter. In this study, a validated 3D biomechanical model of the restored tooth was used for an exhaustive sensitivity analysis. The individual influence of 20 different parameters on the mechanical performance of an endodontic restoration with prefabricated posts was studied. The results bring up the remarkable importance of the loading angle on the final restoration strength. Flexural loads are more critical than compressive or tensile loads. Young's modulus of the post and its length and diameter are the most influential parameters for strength, whereas other parameters such as ferrule geometry or core and crown characteristics are less significant.
authors.affiliation: a Departament d'Enginyeria Mecànica i Construcció , Universitat Jaume I , Campus de Riu Sec. Avinguda Vicent Sos Baynat s/n. 12071, Castelló de la Plana , Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: González-Lluch
authors.forename: Antonio
authors.initials: A
authors.lastname: Pérez-González
authors.forename: Joaquín L
authors.initials: JL
authors.lastname: Sancho-Bru
authors.forename: Pablo-Jesús
authors.initials: PJ
authors.lastname: Rodríguez-Cervantes
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D007180:Incisor / Q000033:anatomy & histology; D008953:Models, Anatomic; D003765:Models, Dental; D011176:Post and Core Technique