Er,Cr∶YSGG激光无水条件下照射牙本质的扫描电镜观察  

Morphological analysis of irradiated dentin by scanning electron microscope under anhydrous condition

作　　者：闫露[1] 孙尚敏[2] 于静涛[1] 

机构地区：[1]中国医科大学口腔医学院牙体牙髓科,沈阳110002 [2]中国医科大学口腔医学院牙周科

出　　处：《国际生物医学工程杂志》2013年第6期348-350,356,共4页International Journal of Biomedical Engineering

摘　　要：目的 观察铒铬钇钪镓石榴石（Er,Cr∶YSGG）激光无水条件下照射牙本质的表面形态,探讨此激光可能的临床应用.方法 人离体前磨牙制备1.5 mm厚的牙本质片11张.1张未做任何处理,作为对照组;其余10张分为5组,无水条件下行Er,Cr∶YSGG激光照射,输出功率分别为1、2、3、4、6W,常规制SEM标本,扫描电镜观察牙本质表面的形态变化.结果 无水Er,Cr∶YSGG激光照射后,随着输出功率的增加,牙本质表面可见小管管腔缩窄,部分小管封闭;3～6W激光照射后牙本质表面出现微裂、炭化等热损伤改变.结论 1～2 W无水Er,Cr∶YSGG激光照射时可起到较为理想而安全的缩窄和封闭牙本质小管的作用,在临床上有望用于治疗牙本质过敏症.Objective To observe the surface morphology of dentin irradiated by Er,Cr∶YSGG laser under anhydrous conditions and discuss the possible clinical applications of the laser.Methods 11 freshly extracted specimens （approximately 1.5 mm thick） taken from the first premolars were selected.One was regarded as the control group without any treatment and the remaining ten were divided into 5 groups whose dentin surface was irradiated by Er,Cr∶ YSGG laser with different energy （1,2,3,4,6 W） under anhydrous condition.The specimens were routinely prepared for electron microscopic scanning observation.Results As the output power increased with Er,Cr∶YSGG laser irradiation,the dentin surface was observed of the constriction of tubular lumen,and part of the tubules closed.The dentin surfaces with 3 ～6 W laser irradiation were observed thermal injury alters such as micro crack and carbonization.Conclusion 1 ～2 W anhydrous Er,Cr：YSGG laser irradiation play a more ideal and safe constriction and sealing role to dentinal tubules,and the laser is expected to be used for the treatment of dentin hypersensitivity.

关 键 词：铒铬钇钪镓石榴石激光 牙本质 扫描电镜 

分 类 号：R781.2[医药卫生—口腔医学]