加强型玻璃陶瓷厚度对树脂水门汀固化效率的影响  

Effect of the thickness of reinforced glass ceramics on the degree of conversion of dual-cure resin cements

作　　者：朱琳琳[1] 仇丽鸿[1] 刘丽杨 李晓琳[1] ZHU Lin-lin QIU Li-hong LIU Li-yang LI Xiao-lin.(Hospital of Stomatology, China Medical University. Shenyang 110002, Liaoning Province, China)

机构地区：[1]中国医科大学附属口腔医院,辽宁沈阳110002

出　　处：《上海口腔医学》2017年第5期492-497,共6页Shanghai Journal of Stomatology

摘　　要：目的:评估不同厚度加强型玻璃陶瓷对3种双固化树脂水门汀Multilink N(Ivoclar Vivadent)、Rely X Ultimate(3M)以及NX3-Nexus(Kerr)聚合转化率(degree of conversion,DC)的影响。方法:使用硬组织切片机将upcera锂瓷、e.max瓷制作成厚度分别为(2.00±0.05)mm、(3.00±0.05)mm和(4.00±0.05)mm的3组正方形瓷片,应用紫外可见近红外分光光度计测量波长400~515 nm可见光范围内的透射率。利用傅里叶红外光谱仪,检测"C=C"吸收峰和"C-C"吸收峰的吸光度值,计算树脂水门汀的DC。采用SPSS 21.0软件包对数据进行统计学分析。结果:2种瓷片在所检测可见光范围内随着厚度的增加,可见光透光率明显降低。在一定波长范围内,2 mm厚度的upcera锂瓷透光率高于e.max瓷,3 mm、4 mm 2种瓷片透光率差异无显著性。2 mm厚度的upcera锂瓷和2 mm厚度的e.max瓷作为固化中介物时,Mutilink N和Rely X Ultimate的固化效率低于NX3-Nexus组。结论:瓷片厚度为2 mm时,upcera锂瓷的透光率高于e.max瓷。upcera锂瓷对Mutilink N和Rely X Ultimate固化效率的影响大于e.max瓷。PURPOSE： To determine the effect of the thickness of reinforced glass ceramics on the degree of conversion （DC） of three dual-cure resin cements （Multilink N, RelyX Ultimate and NX3-Nexus）. METHODS： Upcera reinforced glass ceramics and IPS e.max CAD test specimen were processed, with different thickness, transmittance was tested by ultraviolet and visible spectrometer. The DC was evaluated using Fourier transform infrared （FT-IR） spectrometer, then the degree of conversion of polymerization before and after curing was calculated. SPSS 21.0 software package was used for data analysis. RESULTS： Transmittance decreased along with the thickness of reinforced glass ceramics increased. At 2 mm -thickness transmittance of upcera lithium disilicate glass ceramics was superior to 1PS e.max CAD. The DC of dualcured resin cement was decreased with the increase of thickness. At the same 2 mm group, the DC of Multilink N and RelyX Uhimate under upeera lithium disilicate glass ceramics were superior to that under IPS e.max CAD groups. CONCLUSIONS： At 2 mm-thickness transmittance of upcera lithium disilicate glass ceramics was superior to IPS e.max CAD. At the same 2 mm group, the DC of Multilink N and RelyX Ultimate under upcera lithium disilicate glass ceramics were superior to that under IPS e.max CAD groups.

关 键 词：加强型玻璃陶瓷 树脂水门汀 固化效率 

分 类 号：R783.1[医药卫生—口腔医学]