Study on fatigue life of abutment based on multi-sample test method

Abstract

The key to increasing the service life of dental implants is to improve the stability of dental implants. In the dental implant system, the abutment is the key structure connecting the upper crown and the lower implant and achieving anti-rotation and anti-loosening between them. During daily chewing, the abutment-implant connection will often be twisted by force, and the implant operation requires torque. To ensure its stable use, the abutment-implant connection should have sufficient anti-torsion and anti-deformation ability. The connection structure has an important influence on the overall stability of the implant system.

The research object of this paper is a group of common and representative commercial implant systems. The fatigue life of the abutment is studied by experiments. According to the implant dynamic fatigue test standard (BS EN ISO 14801:2016), the worst conditions of implant fatigue loading were determined, and fatigue tests were carried out on the implant system with this type of connected structure. Through the test results, the maximum cyclic load that the implant can bear in the case of fatigue fracture is determined, and whether the product can be used safely under this load force is verified. The main conclusions of this study are as follows: the abutment can withstand more than 5 million cycles of loading under 240 N load without being damaged. In the absence of special conditions, patients can use the implant product for a long time without replacing it, avoiding the risk of multiple operations.