Influence of preparation design and existing condition of tooth structure on load to failure of ceramic laminate veneers.

Statement Of Problem: Although investigators have evaluated the effect of ceramic veneer preparation design, limited information is available regarding preparation design in association with the condition of existing tooth structure.

Purpose: The purpose of this in vitro study was to evaluate the effect of preparation design and the amount of existing tooth structure on the fracture resistance of pressable ceramic laminate veneers.

Material And Methods: Thirty-two extracted human maxillary central incisors were allocated into 4 groups (n=8) to test for 2 variables: (1) the preparation design (a 2 mm incisal reduction shoulder finish line with or without palatal chamfer) and (2) the existing amount of tooth structure (non-worn tooth or worn tooth).

Esthetic templates for complex restorative cases: rationale and management.

Unlabelled: Complex restorative cases require difficult clinical decisions regarding the final esthetic outcome in which the operator must visualize the definitive restorative position of the teeth. These critical decisions need to be made before treatment is rendered. Communicating these decisions to the patient and the treatment team are crucial prior to achieving clinical success.