In The Performance Study Of Individualized Abutments, What Contents Should Be Focused On?

The success of restoration with implant denture largely depends on the shape, height, taper and material, appropriate number, reasonable distribution of abutments as well as the achievement of a common path of insertion. The basal part of abutment is connected to the implant by internal and external connections, and the upper end of abutment carries the upper restoration and provides it with retention and support. The personalise abutment is designed according to the specific circumstances of patients, which matches better with the anatomical shape and correction angle of patients. For this type of abutments, it is necessary to clarify the information on the shape, height, and taper that the abutment can be processed into. In addition, the implant-abutment connection surface determines the strength and stability during the application of the implant system. The irregularities and small gaps in implant-abutment connection may cause the loosening and breakage of screw as well as accumulation of bacteria at the implant-abutment connection, resulting in complications including peri-implantitis and bone resorption at implant neck. In order to control the interface accuracy, it is required to have CNC processing equipment and quality control capability. The contents for verification should at least include the Gt of internal connection taper, fit clearance, thread deviation, torsional resistance, tightening torque, edge clearance measurement study and fatigue performance study.