瓷修复体循环疲劳失效行为的实验研究方法

Experimental research methods in fatigue failure behavior of dental all-ceramic restorations

牙科陶瓷材料的原始断裂强度远高于口腔正常咬合力,但由于材料的低应力疲劳破坏行为,致使全瓷修复体在口腔长期反复咀嚼功能状态下仍会出现崩裂。采用循环疲劳试验方法分析全瓷修复体的疲劳失效行为,可为其临床可靠性评价和寿命预测提供有力依据。体外实验方法和参数选择对研究口腔修复体循环疲劳失效行为至关重要。

In spite of the strength of dental ceramics far exceeds the occlusal stress,one severe concern for allceramic systems is their susceptibility to fatigue damage caused from long-term mastication.Mechanical simulation of a laboratory test is often used for pre-clinical investigations of dental materials and restorations,aiming at describing the fatigue behavior and predicting the catastrophic failures.This article presents a review of the experimental methods in research of dental restorations.