北京大学学报（医学版）2016，Vol.48Issue(1)：71-75,5.DOI:10.3969/j.issn.1671-167X.2016.01.012
Er，Cr：YSGG激光对牙周炎患牙及健康牙根面的影响
Effects of Er,Cr:YSGG laser on the root surface of periodontitis and healthy teeth
摘要
Abstract
Objective:To evaluate the effects of Er,Cr:YSGG laser on the root surface of periodontally involved teeth and healthy teeth,concerning the microstructure and the roughness.Methods:Eight freshly extracted teeth due to severe periodontitis and eight freshly extracted teeth due to orthodontic rea-sons or being third molar were chosen in this study.The root surface of each tooth was divided into four areas,and received four treatment methods:no treatment (control group );root planing with Gracey scaler for 30 seconds;irradiation by the lower power Er,Cr:YSGG laser;irradiation by the higher power Er,Cr:YSGG laser.Four periodontally involved teeth and four healthy teeth were used for the evaluation of microstructure using scanning electron microscope (SEM).The other four periodontitis teeth and four healthy teeth were used for the evaluation of roughness (Ra value )using 3 D profiler.Results:Smear layer was found on the teeth scaled by Gracey scaler,while the teeth irradiated by Er,Cr:YSGG laser demonstrated a melting surface with less smear layer.In the periodontitis teeth irradiated by the higher power,opening dentinal tubules could be observed.For the periodontally involved teeth,the Ra values of groups 1 to 4 were (237.4 ±20.0)nm,(1 35.7 ±1 1 .9)nm (P=0.01 ),(463.6 ±49.3)nm (P<0.001 )and (486.0 ±59.0)nm (P<0.001 )respectively.For the healthy teeth,the Ra values of groups 1 to 4 were (1 91 .4 ±44.5)nm,(1 31 .6 ±21 .5)nm (P=0.482),(463.7 ±34.6)nm (P<0.001 )and (470.3 ±1 21 .3)nm (P<0.001 )respectively.Conclusion:Er,Cr:YSGG laser can affect the microstructure of the cementum of the periodontitis teeth and healthy teeth.Irradiation by the Er,Cr:YSGG laser resulted in a melting surface with less smear layer and increased the roughness in the surface of root.关键词
Er,Cr:YSGG激光/牙周炎/牙骨质/粗糙度Key words
Er,Cr:YSGG lasers/Periodontitis/Dental cementum/Roughness分类
医药卫生引用本文复制引用
曲春娜,康军,栾庆先..Er，Cr：YSGG激光对牙周炎患牙及健康牙根面的影响[J].北京大学学报（医学版）,2016,48(1):71-75,5.基金项目
北京大学口腔医院新技术新疗法项目（PKUSSNCT-13B12）资助 Supported by the Program for New Clinical Techniques and Thera-pies of Peking University School and Hospital of Stomatology （）
