Progress of research on the design of implant-abutment interface

The stability of marginal bone level is an important factor in ensuring long-term good clinical efficacy of implantation. The design of implant-abutment interface(IAI)is of considerable importance,including whether undergoing multiple abutment disconnection, whether platform switching is used, connection type, connection torque, and connection material differences. These factors can affect the micro gap and micro movement of the connection interface, which change the size of micro leakage and mechanical stability, thereby affecting the long-term clinical efficacy of implants. This article presents a detailed review of the progress of research on different designs in implant-abutment interface, in order to provide a theoretical basis for the selection and operation of abutments in clinical diagnosis and treatment.