Asymptotic stress field for the interface between teeth and different restorative materials

Brittle fracture of restored teeth with direct or indirect restorations materials are often observed in dental clinics. These fractures have different causes such as complex clinical procedures, material choice, cavity design and many more. In order to evaluate this phenomenon this study was focused on stress distribution due to only materials choice and cavity design for direct and indirect restorations. e engineering was used to convert a real molar tooth into a virtual numerical model. A 3D finite element analysis was performed in order to determine the stress field in a Class II restored tooth. ymptotic stress fields for the interface between teeth and different dental restorative materials for Class II preparations were obtained analytically using complex functions. The influence of cavity line angles and restorative material properties was also investigated. The resulting fields are shown to be singular. ical and numerical predictions were validated by testing human teeth samples prepared with direct restorative materials (amalgams, composite resins and ionomers), and different internal cavity line angles.