Er，Cr：YSGG激光照射后硬化牙本质表面超微结构观察  

Ultrastructural study of sclerotic dentin surface following the application of the Er, Cr： YSGG laser

作　　者：靳晓晨[1] 谭建国[1] 张桂荣[2] 俞红[2] 

机构地区：[1]北京大学口腔医学院·口腔医院修复科,100081 [2]北京大学口腔医学院第一门诊部,100081

出　　处：《中华口腔医学杂志》2009年第3期159-161,共3页Chinese Journal of Stomatology

摘　　要：目的通过比较Er，Cr：YSGG激光照射、磷酸酸蚀等方法处理后硬化牙本质表面的超微结构特点，寻找适合硬化牙本质粘接的表面处理方法。方法选择16颗有硬化牙本质的离体牙，使用随机数字表随机分为4组，每组4颗，分别进行磷酸酸蚀（A组）、激光照射（B组）、磷酸酸蚀＋激光照射（C组）、激光照射＋磷酸酸蚀（D组）处理，扫描电镜观察硬化牙本质表面的超微结构。结果A组硬化牙本质表面可见大部分牙本质小管被硬化柱堵塞；B组硬化牙本质表面为均匀一致的蜂窝状改变；C组硬化牙本质表面形态特点与B组类似；D组硬化牙本质表面形态类似于A组，无激光照射后形成的蜂窝状改变。结论Er，Cr：YSGG激光照射硬化牙本质后增加了表面粗糙度，形成的粗糙面可能有利于粘接。Objective To investigate the uhrastructure character of sclerotic dentin surface conditioned by the Er, Cr：YSGG laser and acid etching. Methods Sixteen human teeth with sclerotic dentin were randomly assigned to 4 groups, and conditioned with acid etching （Group A）, laser irradiation （Group B）, laser irradiation after acid etching （Group C ）, or acid etching after laser irradiation （Group D ） respectively. The characters of surface ultrastructure were observed using scanning electron microscope （SEM）. Results In Group A, the majority of dentin tubules were blocked by sclerotic rods. In Group B, the honeycomb-like change was found on the sclerotic dentin surface. The surface structure of Group C was similar to that of Group B. In group D etching wiped off the honeycomb-like structure. Conclusions The sclerotic dentin surface treated with laser irradiation turns into uniform honeycomb-like structure. The rough surface may be beneficial to bonding strength on sclerotic dentin after laser irradiation.

关 键 词：激光 硬化牙本质 超微结构 

分 类 号：R686[医药卫生—骨科学]