天然牙与全瓷饰面瓷的磨损特性研究

华西口腔医学杂志

天然牙与全瓷饰面瓷的磨损特性研究

高清平1, 2, 巢永烈2, 翦新春1, 郭峰1, 孟玉坤2

1.中南大学湘雅医院口腔修复科, 湖南长沙410008; 2.四川大学华西口腔医院口腔修复科, 四川成都610041

收稿日期:2007-10-25 修回日期:2007-10-25 出版日期:2007-10-20 发布日期:2007-10-20
通讯作者: 巢永烈，Tel：028- 85503570
作者简介:高清平（1972-），女，湖南人，主治医师，博士

Wear behavior of enamel and veneer ing cer amics

GAO Qing- ping1，2, CHAO Yong- lie2, JIAN Xin- chun1, GUO Feng1, MENG Yu- kun2

1. Dept. of Prosthodontics, Xiangya Hospital, Central South University, Changsha 410008, China; 2. Dept. of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China

Received:2007-10-25 Revised:2007-10-25 Online:2007-10-20 Published:2007-10-20
Contact: CHAO Yong- lie，Tel：028- 85503570

摘要/Abstract

摘要：

目的通过体外模拟实验观察全瓷饰面瓷材料（Vintage AL、Vita- alpha）与天然牙釉质的摩擦学行为特点，探讨其摩擦磨损机制。方法实验前对材料进行力学性能检测。采用摩擦磨损机观察3种材料的摩擦磨损行为，记录摩擦力矩数，计算摩擦系数；测量磨斑宽度；磨损试件表面采用动态原子力显维镜（DFM）观察；采用能谱仪分析摩擦实验前后样品元素的变化。结果3种材料显微硬度值存在统计学差异（P<0.05）；两种饰面瓷的三点弯曲强度比较有统计学差异（P<0.05），断裂韧性差别无统计学意义。3种材料摩擦系数呈现一定时间规律性，耐磨能由高到低排列为Vintage AL、Vita- alpha、天然牙釉质。磨斑宽度比较有统计学意义（P<0.05）。DFM结果显示釉质主要表现为磨粒磨损和组织结构的变形，偶可见组织断裂片；饰面瓷摩擦表面可见大量犁沟和磨粒，偶见微裂。结论本实验中3种材料呈现良好的耐磨性。天然牙的磨损机理主要是磨粒磨损和组织结构变形；全瓷饰面瓷的磨损机理主要为磨粒磨损、黏着磨损和疲劳磨损，不同磨损类型在两种饰面瓷发挥的作用不完全相同。

关键词: 耐磨性, 釉质, 全瓷饰面瓷

Abstract:

Objective To compare the wear between the enamel and two types of dental decoration porcelains for all- ceramic restorations（Vita- alpha, Vintage AL）. Methods Friction coefficients, wear scar width, element concentrations and wear surface evolution were considered relatively to the tribology of that in vivo situation. The wear scars of the samples were characterized by means of dynamic atomic force microscopy（DFM）. The different element concentrations of the surface before/after the wear test were determined with energy dispersion spectrometry（EDS）. Results The friction coefficient varied from time in each kind of material. The statistical differences between materials were observed in wear scar width and properties of materials（P<0.05）. DFM results showed wear surface of natural tooth full of abrasive particles and denaturation of dental texture. Wear surface of veneering ceramics consisted mainly of abrasive particles, plough and microcracking. EDS results showed that the element concentration of Fe was obviously found on the samples after wear. Conclusion The main underlying mechanisms of natural teeth wear are abrasive, and denaturation of dental texture. Abrasive wear, adhesion and fatigue of veneering ceramics characterize the wear patterns which plays different role in Vita - alpha and Vintage AL. The wear patterns of veneering ceramics can be described as mild wear.

Key words: wear, enamel, veneering ceramic

高清平巢永烈翦新春郭峰孟玉坤. 天然牙与全瓷饰面瓷的磨损特性研究[J]. 华西口腔医学杂志.

GAO Qing- ping1，2, CHAO Yong- lie2, JIAN Xin- chun1, GUO Feng1, MENG Yu- kun2. Wear behavior of enamel and veneer ing cer amics[J]. West China Journal of Stomatology.

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