The effect of DLC-coating deposition method on the reliability and mechanical properties of abutment ’s screws

When prosthesis service involves sliding between metallic surfaces, as occurs in implant-abutment-screw contact area, severe wear (known as galling) may occur. Under loading conditions, materials with lower Young ’s modulus adheres locally to the contacting opposite surface and forms hard “galls” where wear initiates [1,2]. Any force that causes slippage between threads might reduce preload, which is supposed to maintain the joint clamped, potentially leading to screw failure [3]. Clinical findings hav e reported screw failure incidences of 10.8% [4] for single restorations over the years.

Source: Dental Materials - April 10, 2018 Category: Materials Science Authors: Dimorvan Bordin, Paulo G. Coelho, Edmara T.P. Bergamo, Estevam A. Bonfante, Lukasz Witek, Altair A. Del Bel Cury Source Type: research