Research Progress on Mechanical Principle of Retention and Cause of Loosening of Screws in Implant-supported Single Crown.

doi:10.13701/j.cnki.kqyxyj.2019.02.005

Abstract

Abstract: The problem of retentive screw loosening often occurs after clinical restoration. There are many factors that affect the screw retention, such as the screw preload,screw material and morphology, the degree of cohesion between the implant-abutment interface and its connection design, and occlusion force. This article intends to discuss the mechanical principles and causes for the loosening of fixing screws and the latest relevant research progress.

Key words: Dentalimplants, Screwfixation, Screw loosening, Preload

ZHOU Qiang-qiang, LIAO Hong-bing.. Research Progress on Mechanical Principle of Retention and Cause of Loosening of Screws in Implant-supported Single Crown.[J]. Journal of Oral Science Research, 2019, 35(2): 122-124.

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