Nd:YAG激光照射龋洞壁的扫描电镜观察  

Scan Electron Microscopic Study of Carious Cavity Walls Following Nd:YAG Laser Irradiation.

作　　者：管志江[1] 张学云[1] 朱雪华[1] 孙强[1] 谭成柱[1] 

机构地区：[1]河南省新乡市中国人民解放军371医院口腔科,453000

出　　处：《口腔医学》2001年第3期119-120,共2页Stomatology

摘　　要：目的 :观察脉冲Nd :YAG激光照射龋洞壁前后的形态学变化。方法 :选择近期拔除患有龋病牙齿 3 6枚 ,常规去腐质及制备洞型 ,用不同功率Nd :YAG激光照射洞壁后 ,扫描电镜下观察。结果 :扫描电镜下见激光照射前洞壁及洞底仍有蜂窝状及小孔隙样损害存在 ,部分区域可见到稀少的牙本质小管 ,照射后上述结构消失 ,呈熔融状 ,但遗留弹坑状损害。结论 :Nd :YAG激光照射能改变洞壁的表层结构 ,有预防继发龋的作用。Objective:To observe the morphologic changes of carious cavity wall pre and post irradiated by pulsed Nd:YAG laser.Methods:Samples of freshly extracted caries teeth were washed and brushed cleanly,and the carious cavities were prepared by ordinary method.Six different laser powers were applied to irradiate the prepared carious cavity walls,then to observe the morphologic changes with a scan electron microscopic(SEM).Results:The prepared carious cavity wall sufaces were showed irregular type destruction,little holes and rare dentinal tubes after irradiated by pulsed Nd:YAG laser,the aforesaid three structures were disappeared and showed melted form.Conclusion:The prepared carious cavity walls irradiated by Nd:YAG laser may be a good method for preventing secondary caries.

关 键 词：继发龋 预防 ND:YAG激光 扫描电镜 龋洞壁 扫描电镜 

分 类 号：R781.1[医药卫生—口腔医学]