超声在下颌磨牙C形根管预备中的应用  

Clinical study in preparation of C-shaped root canals in mandibular molars between ultrasonic instrument and stainless K files

作　　者：何飞[1] 汪蕾[1] 张萍[1] 

机构地区：[1]第三军医大学附属新桥医院口腔科,重庆400037

出　　处：《牙体牙髓牙周病学杂志》2008年第6期330-333,共4页Chinese Journal of Conservative Dentistry

摘　　要：目的:比较超声法与手动K锉预备下颌第二磨牙C形根管的临床效果。方法:选取临床上需行牙髓治疗的下颌第二磨牙C形根管50例,随机分成两组。实验组25例,用Odontoson-M超声仪预备根管;对照组25例,用手动K型锉预备根管。记录并比较根管预备时间。侧压法根管充填后拍摄X线片,分析根管预备和根管充填的效果。比较两组间根管治疗期间急症的发生率。结果:超声法C形根管预备的平均时间为340s,手动K型锉为620s,两组间差异非常显著;X线片示根管内台阶形成超声组2例,K锉组3例;手动K型锉组出现3例根尖阻塞,3例根尖偏移。与对照组相比,实验组根管预备效果显著提高,同时治疗期间急症发生率(EIE)有所改善,但未见显著性差异。结论:超声法预备下颌第二磨牙C形根管操作简便、高效实用、安全,是临床上对下颌第二磨牙C形根管进行预备的有效工具。AIM： To compare the clinical effects between ultrasonic instrument and stainless K files in preparation of C - shaped root canals in mandibular second molars. METHODS ： Fifty mandibular second molars with C - shaped root canals scheduled with root canal treatment were divided into two groups in random principle. In experimental group （n = 25） , root canals were prepared with Odontoson - M ultrasonic instrument as manufacture＇s instruction. Canals prepared with K Flexofiles by hand as control group （n = 25）. The time of preparation of each tooth was recorded. All teeth were obturated with lateral condensation method and were taken radiograph to analyze the efficacy of preparation and obturation. The incidence of EIE （ Endodontic interappointment emergencies） was observed. RESULTS： The mean prepared time of experiment group is 340s, which is significantly less than the control group （620s）. There were two apical ledges in the experiment group and three in the control group. In addition, three apical blockages and three apieal transportation were found in the control group. Compared with the control group, incidence of EIE was not significantly increased in the experiment group. CONCLUSION： Compared with K Flexofile, ultrasonic instrument can prepare the C- shaped root canal more effective, easy and safe.

关 键 词：超声 C型根管 根管预备 

分 类 号：R781.3[医药卫生—口腔医学]