摘要
目的:了解感染根管管壁牙本质的病变特点,根管预备及Nd:YAG激光照射对感染根管的作用。方法:选用单根患牙60颗,随机分为5组:对照组(治疗前感染根管)、根管预备组(用手用器械根管预备)、3个激光组(在常规根管预备后,采用3种不同能量参数照射1min),做扫描电镜观察。结果:对照组:感染根管牙本质小管形态不规则,排列紊乱。根管预备组:能去除病变的牙本质层,形成玷污层。50mj10Hz激光组不能封闭牙本质小管。100mj10Hz、150mj10Hz激光照射1min根管壁呈熔融状态,去除了玷污层,牙本质小管封闭和半封闭。结论:激光剂量在100mj10Hz或在此以上时,能有效清洁根管壁玷污层和封闭牙本质小管。
Objective： To investigate the characteristics of infected root canal, the effect of hand instrument preparation and irradiation on infected root canal. Methods.. Sixty single root teeth were randomly divided into five groups： control group（infected root canal）, root canal preparation group（hand instrument preparation）, three laser irradiation groups（three groups were irradiated by Nd：YAG laser with different energy for 1 minute after canal preparation）, and observed by SEM. Results： Control group： the dentinal tubules lined up in disorder and irregularity. Root canal preparation group： the infected dentine can be removed, but the dentinal tubules were covered by smear layer, laser irradiation（50mj 10Hz） can not seal dentinal tubules, laser irradiation （100mj 10Hz, 150mj 10Hz） for 1 minute can remove smear layer and seal or semi-seal dentinal tubules. Conclusion： Smear layer of root canal wall can he removed and dentinal tubules can he sealed effectively by laser at or beyond 100mj 10Hz setting.
出处
《中华老年口腔医学杂志》
2006年第1期4-7,共4页
Chinese Journal of Geriatric Dentistry
