Er、Cr:YSGG激光根管内照射对根管封闭效果的影响

目的:探讨常规根管预备后使用不同能量的Er、Cr:YSGG激光进行根管内照射对根充后根管封闭效果的影响。方法:选择新拔除的单根管牙105颗,分成7组,每组15颗牙。切除牙冠后,常规进行根管预备。第1组不进行任何处理,作为阳性对照组;第2组为1W、有水激光照射;第3组为1W、无水激光照射;第4组为2W、有水激光照射;第5组为2W、无水激光照射;第6组为3W、有水激光照射;第7组为3W、无水激光照射。根充后进行根尖微渗漏检测,评估根管封闭效果。采用单因素方差分析(Anova)进行多组间总体均数比较,q检验进行组间比较。结果:除3W无水组外,其他各激光组与对照组相比,根尖微渗漏深度均有显著性差异(P<0.05);其中1W无水组与对照组相比具有高度显著性差异(P<0.01)。结论:较低能量(除外3W、无水)Er、Cr:YSGG激光进行根管内照射,能够有效提高根管充填后的封闭效果,其中1W、无水激光照射时根管封闭效果最好。

Research on the effect of root canal seal achieved by irradiation of Er,Cr:YSGG laser

PURPOSE: To evaluate the effect of root canal seal achieved by routine root canal preparation and irradiation of Er,Cr:YSGG laser in root canal therapy. METHODS: One hundred and five freshly single-rooted extracted human teeth were selected for the study, which were randomly divided into seven groups of fifteen each. The anatomic crowns were removed at the cementoenamel junction and the remaining roots were prepared endodontically with conventional methods. Then they were treated with Er?Cr:YSGG laser in different parameters and patterns. The effect of root canal seal achieved by Er?Cr:YSGG laser was evaluated with microleakage measurements. Newman-Keuls test and one-way analysis of variance were used to determine the statistical differences between various groups. A value of P<0.05 was considered to be significant. RESULTS:The amount of dye penetration from an apical stop with irradiation of Er,Cr:YSGG laser was significantly lower (P<0.05) except 3W laser without water flow, and in 1W Er,Cr:YSGG laser without water flow, the amount of apical dye penetration was significantly decreased (P<0.01). CONCLUSIONS: The utilizing of Er,Cr:YSGG laser in small parameters prior to root canal filling could promote the effect of apical seal. Based on our results, it appeared that the seal effect of 1W Er,Cr:YSGG laser without water flow was superior to the effects of others.