乳牙恒牙龋化学机械法去腐的扫描电镜观察  

Scanning electron microscopic observation of human dentine of permanent and primary teeth after chemo-mechanical removal of dental caries tissue

作　　者：陈小贤[1] 葛立宏[2] 

机构地区：[1]北京大学口腔医学院.口腔医院第一门诊部儿童口腔科,100034 [2]北京大学口腔医学院.口腔医院儿童口腔科

出　　处：《实用口腔医学杂志》2013年第1期90-93,共4页Journal of Practical Stomatology

摘　　要：目的:观察Carisolv化学机械去腐技术和慢速球钻去腐后及酸蚀后的窝洞表面形态。方法:新鲜拔除且有冠部中、深龋的24颗恒牙和12颗乳牙,其中12颗恒牙和6颗乳牙用Carisolv化学机械法,其余牙用慢速球钻法去腐,扫描电镜(SEM)观察去腐后窝洞表面形态以及恒牙酸蚀后的形态。结果:恒牙和乳牙用慢速球钻去腐后牙本质表面几乎全部为玷污层覆盖,很少见到牙本质小管开口;Carisolv去腐后的表面玷污层很少,牙本质小管开口开放,很少见到管栓。慢速球钻或化学机械去腐后用磷酸酸蚀均可以去除窝洞表面的玷污层。结论:Carisolv化学机械去腐效果优于球钻,磷酸酸蚀可增强去污效果。Objective： To observe the surface morphology of dentine after removal of dental caries tissue. Methods： 24 freshly ex- tracted permanent teeth and 12 deciduous teeth with coronal medium or deep caries were collected. For half of the teeth, the caries tis- sue was removed by Carisolv, and for the other half by round steel bur. After removal of the caries tissue of permanent teeth 35% phosphate acid etching was applied for the surface treatment （n = 6）, Then the dentine surface was examined by scanning electron mi- croscopy（SEM）. Results： Bur-excavated dentin surface was covered with a homogeneous residual smear layer, and only a few den- tine tubule openings were visible. Cafisolv gel excavated dentine surface was with less smear layer and more open dentine tubules. 35% phosphate acid etching could dissolve smear layer in both groups of permanent tooth. Conclusion： Carisolv is more effective than round steel bur in the removal of dental caries tissue. Acid etching may further remove the residual smear.

关 键 词：化学机械去腐 CARISOLV 扫描电镜 玷污层 

分 类 号：R781.05[医药卫生—口腔医学]