Materials and adhesive strategies for preserving tooth substance

Abstract

It is difficult to bond an artificial material to the“tooth substance”with marked defects and make them function clinically. Dental materials are manufactured under strict control, and their qualities are almost uniform. Nevertheless, the physical characteristics of tooth substances differ from individual to individual, and are affected by factors such as species, heredity, and the environment. Even within the same individual, the quality varies greatly depending on whether it is devitalized. It is extremely difficult to select the best material for each individual and each tooth.Adhesive techniques are essential for tooth crown restoration. Advances in adhesive techniques have brought esthetics and functionality to dental practice. Crown restoration set using bonding material or resin cement with high adhesive strength can function for a long time without failure. However, an excessive adhesive strength should lead to adherend failure, and in the worst case, to tooth substance fracture.The clinical theory of crown restoration and adhesive system for the prevention of tooth substance fracture should be discussed.