摘要
目的研究冷热循环对CAD/CAM树脂陶瓷复合材料表面粗糙度及形貌的影响。方法以树脂陶瓷复合材料LU(Lava Ultimate),CE(Cerasmart),HY(Hyramic润瓷),VE(Vita Enamic)为实验组,以长石质玻璃陶瓷VM(Vita Mark Ⅱ)为对照组,分别在抛光即刻和经10000次冷热循环后(冷热循环仪设置高温55℃,低温5℃,浸水时间为30s),测量表面粗糙度R_(a)并进行统计学分析,扫描电子显微镜(SEM)观测试件表面形貌。结果在抛光即刻,LU、CE、HY和VE组的R_(a)值在0.095~0.106μm之间,组间差异均无统计学意义(P>0.05)。VM组R_(a)值最小,为(0.054±0.014)μm,与其他4组相比差异具有统计学意义(P<0.05)。经冷热循环后,各组材料R_(a)值均增大,但与抛光即刻相比差异无统计学意义(P>0.05)。老化后,VM组R_(a)值仍小于其他4组,差异具有统计学意义(P<0.05)。SEM下表面形貌无明显变化。结论经冷热循环后,CAD/CAM树脂陶瓷复合材料和玻璃陶瓷表面微结构均较稳定。
Objective The aim of this study was to investigate the influence of thermal cycling on the surface roughness and topography of CAD/CAM resin ceramic composites.Methods Four kinds of CAD/CAM resin ceramic composites,LU(Lava Ultimate),CE(Cerasmart),HY(Hyramic),VE(Vita Enamic),and a feldspathic ceramic VM(Vita Mark II)were used for this study.The surface roughness of these materials were measured after polished immediately and after thermal cycling for 10000 times(the high temperature was 55℃,the low temperature was 5℃,and the immersion time was 30s),and changes of microstructure were observed under scanning electron microscopy(SEM).The data were statistically analyzed.Results LU,CE,HY and VE exhibited statistically similar surface roughness values between 0.095~0.106μm(P>0.05),VM exhibited significantly lower surface roughness values(0.054±0.014μm)than the other groups(P<0.05).After 10000 thermocycles,surface roughness values did not change significantly for all materials(P>0.05).No obvious change of surface topography was observed under SEM.Conclusion The surface microstructure of CAD/CAM resin ceramic composites and feldspathic ceramic were stable after thermal cycling.
作者
刘亚男
刘思思
王立凯
王海锋
Liu Yanan;Liu Sisi;Wang Likai;Wang Haifeng(Department of Stomatology,Beijing Bo’ai Hospital,China Rehabilitation Research Center,Capital Medical University School of Rehabilitation Medicine,Beijing 100068)
出处
《口腔材料器械杂志》
2022年第3期158-162,共5页
Chinese Journal of Dental Materials and Devices
基金
中国康复研究中心青年基金课题(编号:2019zx-Q6)。
