摘要
目的:用混合评价法比较通用型复合树脂(Z350 XT)和磨牙复合树脂(P60)的临床效果及耐磨耗性能。方法:用Z350 XT和P60随机修复66个磨牙牙合面、邻牙合面缺损,于修复后1、6个月按照改良USPHS标准对修复体进行评价;同时,用硅橡胶印模材料制取印模,灌制环氧树脂模型用于扫描电镜下观察其表面微形貌,灌制石膏模型用于三维形貌扫描并计算磨耗量。结果:复合树脂修复后1、6个月,Z350 XT组色泽匹配和表面粗糙度均优于P60组(P<0.05)。6个月时,修复体表面平均磨耗深度Z350 XT、P60组分别为(40.84±14.95)μm、(35.03±13.03)μm(P>0.05),磨耗体积分别为(1.20±0.62)mm3、(0.68±0.43)mm3(P>0.05)。扫描电镜观察显示,1、6个月时P60组表面暴露出较大的填料颗粒,导致表面较粗糙。结论:通用型复合树脂Z350 XT色泽匹配性和表面粗糙度优于磨牙复合树脂P60,6个月时2种复合树脂的临床耐磨耗性无显著差异。
AIM： To compare the clinical performance and wear resistance of an universal composite and a posterior composite by a mixed- method approach. METHODS： Z350 XT and P60 composite resin were randomly placed in 66 Class Ⅰ and Ⅱ cavities respectively in molars（ n = 33）. The restorations were evaluated after 1- and 6-month according to modified USPHS criteria. Meanwhile,impressions of the restorations were taken using a polyvinyl siloxane impression material and then epoxy resin replicas and stone replicas were prepared for the obseruation of surface microstructure under SEM and 3D scanning image to quantify the wear. RESULTS： Z350 XT showed better color matching and surface roughness than P60（ P 〈 0. 05） in 1- and 6- month observation. The surface mean vertical losses of Z350 XT and P60 restorations were（ 40. 84 ± 14. 95） μm and（ 35. 03 ± 13. 03） μm（ P 〉 0. 05）,and volume losses were（ 1. 20 ± 0. 62） mm3and（ 0. 68 ± 0. 43） mm3respectively（ P 〉 0. 05）. After 1- and 6- month,the surface of P60 exposed largefillers,resulting ina rougher surfacethan Z350 XT. CONCLUSION： Of Z350 XT universal composite performs better in color match and surface roughness than P60 posterior composite,the wear resistance is not significantly different between the two composites in 6 months.
出处
《牙体牙髓牙周病学杂志》
CAS
2016年第4期240-244,253,共6页
Chinese Journal of Conservative Dentistry
基金
国家自然科学基金(81571014)
作者简介
何治一（1989-），女，汉族，黑龙江哈尔滨人。硕士生（导师：赵信义）
通讯作者：赵信义，E-mail：zhaoxinyi@fmmu．edu．cn
