Duplex treatment of arc plasma nitriding and PVD TiN coating applied to dental implant screws

In modern dentistry, surface modification technology is critical for the long-term service of dental implants. The purpose of this study was to evaluate the effects of the duplex treatment of arc plasma nitriding and TiN coating on the mechanical behavior of implant systems. The Ti6Al4V screws of dental implants were treated by physical vapor deposition (PVD), arc plasma nitriding (APN), and arc plasma nitriding-physical vapor deposition (APNPVD). The surface characteristics, loosening properties, and fatigue performance of different treated screws were analyzed. The results showed that APN-PVD duplex treatment produced a gradient surface structure, reduced the surface roughness, and improved the TiN coating adhesion. Compared with the PVD-treated screws alone, APNPVD-treated screws improved anti-loosening performance, reduced surface wear, and prolonged fatigue life. Duplex treatment by arc plasma nitriding and TiN coating may be a method suitable for dental applications.

Automated summary

This study evaluated the effects of duplex treatment of arc plasma nitriding and TiN coating on the mechanical behavior of implant systems, showing that this treatment can improve the anti-loosening performance of screws, reduce surface wear, and prolong fatigue life.