孙淑萍，，潘亚萍*，邹 博
（中国医科大学口腔医学院，辽宁 沈阳 110002）
摘要：目的：观察不同能量输出的Er,Cr:YSGG激光照射对牙周病牙根面的影响，探讨Er,Cr:YSGG激光用于牙周治疗的可行性和有效性。方法：选择因牙周病松动Ⅲo而拔除牙12颗，随机分3组，每组4颗。分别以1.5 W、2.0 W、2.5 W激光照射。扫描电镜（SEM）观察各组牙根表面和纵剖面。结果：低倍镜下各组根面改变无明显差异，表面干净，粗糙程度均匀，未见明显弹坑状痕迹；高倍镜下1.5 W激光照射组显示根面粗糙程度更均匀一致，无弹坑状改变，无熔融、炭化迹象，未见牙本质小管暴露。结论：Er,Cr:YSGG激光能有效去除牙周病牙根面玷污层及病变牙骨质，根面无熔融、炭化等改变。1.5 W激光照射组优于2.0 W组和2.5 W组。
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Effects of Irradiation of Er,Cr:YSGG Laser on Periodontal-Diseased Root Surfaces
SUN Shu-ping, PAN Ya-ping*, ZOU Bo
(School of Stomatology, China Medical University, Shenyang 110002, Liaoning)
Abstract:Objective:The purpose of this study was to evaluate the effects of Er,Cr:YSGG laser irradiation at different energy outputs on periodontal-diseased root surfaces, so as to determine the feasibility and effectiveness of Er,Cr:YSGG laser in the treatment of periodontal diseases.Methods:12 human teeth IIIo-loosened because of periodontal diseases were extracted and divided randomly into 3 groups with 4 teeth in each group. The 3 groups were irradiated at energy settings of 1.5 W, 2.0 W and 2.5 W respectively before scanning electron microscopy (SEM) was used to observe the root surfaces and the longitudinal profiles in each group. Results:Lower magnifications revealed no distinct difference between the root surfaces in each group. All specimens showed clean surfaces and equal roughness with no notable craters observed. Under higher magnifications, the 1.5 W group showed more smooth surfaces. There were no signs of craters, melting or carbonization, and no exposed dentinal tubules were observed.Conclusions:Er,Cr:YSGG laser could effectively remove the smear layers and infected cementum on periodontal-diseased root surfaces without causing negative changes like melting and carbonization. Compared to the other 2 groups, the 1.5 W group produced better results.
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