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目的探讨Er:YAG激光与Gluma脱敏剂联合应用对牙本质小管的封闭作用。方法选取2010年3—6月于山西医科大学口腔医院口腔颌面外科因正畸拔除的24颗前磨牙,制成厚约2mm的牙本质片。根据其表面处理方式的不同随机分为4组:对照组、Er:YAG激光组、Gluma脱敏剂组、联合应用组(Er:YAG激光联合Gluma脱敏剂),每组6颗前磨牙。处理后,扫描电镜观察各组牙本质小管形态特征,并测量牙本质小管口的直径和相对面积。结果联合应用组中牙本质小管口的直径和相对面积均明显小于其他各组,且差异有统计学意义(P<0.05)。结论 Gluma和Er:YAG联合应用对牙本质小管的封闭作用优于单独应用Gluma脱敏剂或Er:YAG激光。
Objective To investigate the blocking effect of Er: YAG laser combined with Gluma desensitizer on dentinal tubules. Methods Twenty-four premolar teeth from oral and maxillofacial surgery in Shanxi Medical University Stomatology Hospital from March to June in 2010 were selected to make dentin slices about 2 mm in thickness. According to the different surface treatment methods, they were randomly divided into 4 groups: control group, Er: YAG laser group, Gluma desensitizer group and combination group (Er: YAG laser combined with Gluma desensitizer). After treatment, the morphology of dentinal tubules in each group was observed by scanning electron microscopy, and the diameter and relative area of dentinal small orifice were measured. Results The diameter and relative area of dentinal orifice in the combination group were significantly smaller than those in other groups (P <0.05). Conclusion The combination of Gluma and Er: YAG in dentinal tubules is better than gluma desensitizer or Er: YAG laser alone.