两种拆除根管桩的方法比较  

A comparative study on the two methods of post removal

作　　者：宋维来[1] 陆支越[1] 王科力[1] 陈娜[1] 

机构地区：[1]北京医院口腔科,主治医师北京100730

出　　处：《口腔颌面修复学杂志》2005年第3期221-222,共2页Chinese Journal of Prosthodontics

摘　　要：目的:比较超声与机用钻针在拆除根管桩中的作用。方法:选取人上颌中切牙30颗,截去牙冠后根管预备并采用铸造桩修复,使用磷酸锌水门汀粘固。30颗牙随机分为三组,10颗牙不作处理作为对照:10颗牙使用机用钻针在桩周围切割出4mm深的一圈窄沟;另10颗牙超声震动处理10分钟。使用AGS-10kNG万能电子力学试验机检测使桩脱位所需的载荷大小,应用SPSS对数据进行方差分析。结果:机用钻针和超声震动均可有效地减小铸造桩的固位力。结论:机用钻针和超声震动的方法均能有效地使桩脱位。Objective： To compare the effects of different methods of post removal using ultrasonic vibration and bur drilling respectively. Methods： 30 isolated maxillary incisors were selected and decoronated. Cast posts were fabricated and cemented with zinc phosphate on the left roots after endodontic treatment. The teeth were randomly divided into 3 groups each for 10 teeth： the dental structure around the posts was drilled with bur to produce a groove with depth of 4mm in the first group; the posts were vibrated ultrasonically for l0 minutes in the second group; the third group served as control. The removal force of the posts was recorded with AGS-10kNG universal testing machine, and the data were analyzed with analysis of variance using SPSS 10.0 software. Result： There was significant difference in removal force between the two experimental groups and the control group. Conclusion： Post removal can be easier with the help of ultrasonic vibration or bur drilling.

关 键 词：根管疗法 根管桩 超声 

分 类 号：R781.05[医药卫生—口腔医学]