The Third International Conference on Computational Modeling of Fracture and Failure of Materials and Structures

In dentistry, many preparation guidelines for allceramic crowns are still based upon clinical experience and those developed for metal ceramic crowns that may not be applicable and need further experimental and numerical evaluation. Some specific features are requiring investigation in dental prosthetic devices, for example, configurations of the crowns’ margin [1], marginal thickness [2, 3] and degree of convergence angle [4]. The goal of this study was to determine the influence of marginal thickness and taper abutment convergence angle on fracture resistance in resin bonded glass models. Extended finite element method (XFEM) has been adopted to examine models with variations of marginal thickness (0.8-1.2 mm), convergence angle (6-12 ̊), and two cement methods (partially bonded and non-bonded). It has been shown that XFEM enables to model crack initiation and growth under the assumptions of linear elastic fracture mechanics (LFEM) [5].