Cavity configurations for in direct partial coverage adhesive-cemented restorations

ndirect esthetic adhesive restorations in composite resin and ceramics belong to the wider category of partial-coverage crown restorations. As such, they require preparation designs that leave a certain amount of intact clinical crown and generally have supragingival margins.1 To guarantee the fracture resistance of a partial-coverage crown restoration over time, it is necessary to determine which part of the clinical crown that has, by itself or in combination with the buildup, appropriate structural characteristics and sufficient biomechanical strength. This decision influences the clinical outcome of the restoration. Respecting biologic principles and using a conservative approach are the building blocks for a successful outcome. For indirect tooth-colored adhesive-cemented restorations, the highest incidence of failure is fracture of the restoration material and intact tooth, together with secondary caries.2 To avoid fracture, cavity preparation should be considered as both a diagnostic and operative phase.