Study on wear resistance of implant abutment using different surface treatment methods

Abrasion often happened in abutment screw during the operation of dental implant, and it often resulted in reduction of tightness between the abutment and the implant, which always caused the connection failure at last. The purpose of this in vitro study was to research the wear resistance of implant abutment screw under different surface treatment methods, and to find appropriate method to increase the wear resistance of implant abutment screw. Titanium abutments which were treated by low-temperature surface nitriding and low-temperature magnetron sputtering with TiN coating respectively were the experimental groups, and the untreated titanium implants and related abutments were used as the control groups. Wear resistance was obviously increased after low-temperature surface nitriding and low-temperature magnetron sputtering.