摘要
目的:研究4种充填用复合树脂材料:Beautifit(B),SureFilTM(S),TE-Econom(T),Charisma(C)与牙釉质对磨,改变人工唾液pH值,对树脂材料与牙釉质磨耗性能的影响。方法:利用UMT-2微摩擦磨损实验机模拟复合树脂与牙釉质磨耗,计算树脂磨耗质量丧失量,扫描电镜观察磨耗后表面形貌。结果:SEM显示,B、S树脂中无机填料颗粒体积较大,C树脂相对较小且均匀。4种树脂无机填料颗粒周围均出现裂纹和脱落迹象,牙釉质在酸性环境浸泡时磨损表面出现特征性变化。S,C,T3种树脂较耐磨损;人工唾液pH值由6.8降为4.0时,B、S、T3种树脂磨损量显著增加,C磨损量变化不显著。结论:不同品牌的复合树脂与牙釉质对磨时,耐磨性不同;降低pH值可以加速某些复合树脂的磨损。
Objective ：To evaluate the wear resistance of four types of composite resin when they were opposed by human enamel antagonist. The relationship between pH value and wear resistance was also evaluated. Methods： Mutual wear between four types of composite resins（3 mm × 20 mm × 1 mm） , Beautifit（B） , SureFil^TM （S） , TE- Econom（T） , Charisma （C） , with same rough surface and opposing enamel was evaluated using a wear simulator of UMT-2 （n = 10）. Wear resistance was assessed as weight loss（g）. The worn surfaces were observed with scanning electron microscope（SEM）. All data were statistically analyzed with SPSS14.0. Results：SEM observation showed that the fillers particles of resin B, S were bigger than that of the others. Fillers of resin C was the smallest and the most well-distributed. Many filler particles were lost. In the acid environment, the enamel surface had the special appearance. The S, C,T composite resins were less worn. The weight loss of the T, B, S composite resins increased when pH value fell down to 4.0 （ P 〈 0.05 ）, resin C did not changed remarkably （ P 〉 0.05 ）. Conclusion： The wear resistance among the different brands of composite resins are discrepant. The weight loss might be accelerated with the decreased pH value.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2008年第6期811-814,共4页
Journal of Practical Stomatology
关键词
牙釉质
复合树脂
摩擦磨损性能
PH值
Enamel
Composite resins
Friction and wear behavior
pH value
