The study of cyclic fatigue and lifetime for all-ceramic crown after cementation

VernacularTitle:前牙全瓷冠的循环疲劳特性及寿命分析
Author: Hai-Tao XIN ¹ ; Wei-Guo GUO ; Yu-Long LI
Author Information

1. 第四军医大学口腔医学院
Keywords: Denture,partial,fixed; Ceramics; Fatigue; Lifetime
From: Chinese Journal of Stomatology 2009;44(2):101-104
CountryChina
Language:Chinese
Abstract: Objective To study mechanical and cyclic fatigue behavior of IPS Empress2 under cyclic loading, and to establish guidelines for the use and design of all-ceramic crowns. Methods A 3-D finit element method model of tooth and crown were established. The strength and lifetime of all-ceramic crowns under cyclic loading in centric occlusion were investigated using computational techniques of the Abaqus and MSC Fatigue software. Results Most of the fatigue and fracture of all-ceramic crown occurred within the veneering material at cervical marginal of the crown. The number of loading cycles before failure occurred varied within specified limits 2 506 109-6 950 243. The lifetime of the crown decreased significantly as loading increased and decreased gradually as loading time increased as well. Conclusions The mechanical and fatigue behavior of ceramic materials and restorations need to be improved before clinical use in order to guarantee clinical long-term success of all-ceramic crown. The occlusal force should be adjusted properly in order to increase the longevity of all-ceramic crowns.