Clinical Significance of Internal Friction Connection and Micro-Threads in Implant-Supported Prostheses: A Literature Review

Abstract

A connection structure using both a screw and friction is advantageous to secure an abutment to an implant. Understanding the biomechanics of the implant-abutment connection is necessary for the long-term clinical survival of a dental implant with decreased complications. The internal conical friction connection structure and micro-threads have shown favorable biological hard tissue response with exceptional structural features. The internal conical connection structure maintains the soft tissue seal and the marginal bone level around the implant. The durability of the implant wall thickness at the top is balanced via micro-threads with the load-transfer mechanism, resulting in proper peri-implant bone strain. These two structural devices are designed to achieve implant-abutment connection stability by redistributing an external load and by minimizing screw loosening events that cause implant component fractures and marginal bone loss.