光照射时间对二氧化锆陶瓷树脂粘接性能的影响

The effect of light irradiation time on the resin bond to zirconia

目的:探讨在保证自粘接型树脂水门汀固化的同时延长光照射时间,能否改善其与二氧化锆陶瓷的粘接效果。方法:二氧化锆陶瓷片(InCoris ZI,Sirona)经烧结、打磨后,分别与3种自粘接型树脂水门汀(Biscem,G-Cem,SA Luting)粘接。每种树脂水门汀按照光照射时间(5、20、40 s)和冷热循环次数(0、5 000次)等实验条件交叉组合为6个实验组(n=10),测量每组试件的剪切粘接强度。另外每种树脂水门汀按照光照射时间分为3个实验组(n=5),测量避光保存24 h后的试件表面努氏显微硬度值。使用单因素方差分析和独立样本t检验分别对数据进行统计学处理。结果:除了G-Cem的40 s、SA Luting的20 s和40 s光照射组外,冷热循环显著降低了其余各组的粘接强度。冷热循环前,3种树脂水门汀的5 s和20 s光照射组的粘接强度显著高于40 s光照射组的;冷热循环后,20 s光照射组的粘接强度高于5 s和40 s光照射组。3种树脂水门汀20 s和40 s光照射组的显微硬度显著高于5 s光照射组的。结论:光照射时间对自粘接型树脂水门汀的固化及其与二氧化锆陶瓷的粘接强度和耐久能力有显著影响,但光照射时间的过长对二氧化锆陶瓷树脂粘接效果并不是有利的。

Objective： To evaluate the effect of light irradiation time on the bond strength and durability of self-adhesive resin cements to zireonia ceramic. Methods： The zirconia ceramic（ InCoris ZI, Sirona） plates were fired and polished, then bonded with three self-ad- hesive resin cments Biscem, G- Cem and SA Luting respectively, then light irradiated for 5, 20 and 40 s respectively. The bond strength of the specimens were measured before and after 5 000 thermal cycles（ n = 10）. The surface Knoop hardness of three self-adhesive resin cements was measured 24 hs （ n = 5 ） after light irradiation. The data were analyzed by one- way ANOVA and independent t test. Re- suits： Except of 40 s irradiation group of G- Cem and 20 s and 40 s irradiation groups of SA Luting, thermocycling significantly reduced the bond strength of other groups. Before thermocycling, the bond strength of 5 s and 20 s irradiation groups of the 3 resin cements was higher than that of 40 s irradiation group; after thermocycling, the bond strength of 20 s irradiation group was higher than that of 5 s and 40 s irradiation groups. To three resin cements, the microhardness of 20 s and 40 s irradiation groups were higher than that of 5 s irradia- tion group. Conclusion： The light irradiation time can affect the cure and bond potential of self-adhesive resin cement, and the exces- sive light irradiation time might have the adverse effect on the resin bond effect of zircornia ceramic.