Nd:YAG激光照射对牙本质表面微观特征影响的实验研究  

The experimental study on the effect of dentine micro-characteristic features after irradiating with Nd:YAG laser

作　　者：李雪英[1,2] 孔婷婷[1] 刘莉 董少杰[1] 李晓红[1] 牛林[1,4] LI Xue-ying KONG Ting-ting L DONG Shao-jie LI Xiao-hong NIU Lin(Stomatology Hospital of Xi＇an Jiaotong University College of Medicine, Shaanxi Xi＇an, 710004, China Department of endodontics, Stomatological Hospi- tal of Yantai, Shandong Yantai 261000, China Department of orthodontics, Stomatological Hospital of Yantai, Shandong Yantai 261000, China Shaanxi Province Clinical Reaserch Center for Dental and Maxillofacial diseases, Stomatology Hospi- tal of Xi＇am Jiaotong University, Shaanxi Xi＇an, 710004, China.)

机构地区：[1]西安交通大学附属口腔医院,陕西西安710004 [2]烟台市口腔医院牙体牙髓科,山东烟台264000 [3]烟台市口腔医院正畸科,山东烟台264000 [4]陕西省牙颌疾病临床医学研究中心,陕西西安710004

出　　处：《临床口腔医学杂志》2016年第9期519-522,共4页Journal of Clinical Stomatology

摘　　要：目的:研究不同剂量Nd:YAG激光照射后,牙本质小管封闭深度及不同深度内钙磷比值的变化,得出Nd:YAG激光治疗牙本质过敏症的最佳参数。方法:酸蚀法建立牙本质敏感模型,应用不同参数的Nd:YAG激光照射样本,A组(0 mj,0 Hz,对照组);B组(30 mj,5 Hz);C组(30 mj,10 Hz);D组(50 mj,5 Hz);E组(50 mj,10 Hz)。照射完成后将样本纵剖,扫描电镜观察照射前后样本牙本质小管封闭深度并用X-线能谱分析不同深度处样本钙磷比值变化。结果:扫描电镜见B组牙本质小管表面封闭,近表面处小管直径比对照组变小。C、D两组牙本质小管熔融达一定厚度,且牙本质结构完整。E组牙本质熔融厚度达25μm,但熔融区中有微孔产生。X线能谱分析各组样本5μm、20μm深处的钙磷比值,差异无统计学意义。结论:Nd:YAG激光牙本质脱敏的较为理想参数为(30 mj,10Hz)和(50 mj,5 Hz)。Objective： To evaluate the dentine micro- characteristic change after irradiating with Nd： YAG laser.Methods： The dentin hypersensitivity model was setted up by Acid etching. And then the samples were irradiated by Nd：YAG laser under different parameters. The morphological alterations and the calcium- phosphorus（ Ca / P） ratio in different depth of the dentin were examined with SEM combined with energy dispersive X-ray microanalysis. Results： At the longitudinal section of samples,the dentinal tubules were blocked and with smaller diameter of tubules near the dentine surface at group B compared with the control group. Dentinal tubules were blocked to a certain depth and no damage at group C and D.The tubules were blocked from surface to the 25μm deepth and had many micro- cracks around the tubules at group E.Compared with the control group,the Ca / P ratios at 5μm and 20μm deepth were a little different but there was no statistically significant（ P 0. 05）. Conclusion： The suitable energy parameter of Nd： YAG laser seem been 30 mj,10 Hz and 50 mj,5Hz during treating dentin hypersensitivity.

关 键 词：牙本质敏感症 ND:YAG激光 牙本质小管 钙磷比值 

分 类 号：R781.2[医药卫生—口腔医学]