牙科显微镜在探查上颌第一恒磨牙近颊根管口的应用  

Application of dental operative microscope in detecting the mesiobuccal root canal orifice of the maxillary first permanent molar

作　　者：杜嵘[1] 洪瑾[2] 

机构地区：[1]上海交通大学医学院第九人民医院口腔医学院牙体牙髓科,上海市口腔医学研究所,上海200011 [2]上海交通大学医学院第九人民医院口腔医学院口腔特需门诊上海市口腔医学研究所,上海200011

出　　处：《上海交通大学学报（医学版）》2008年第4期414-416,共3页Journal of Shanghai Jiao tong University:Medical Science

基　　金：上海市科技发展基金(064119542)~~

摘　　要：目的探讨牙科显微超声技术在探查上颌第一恒磨牙近颊根管口的应用。方法以76颗离体上颌第一恒磨牙为研究对象,首先采用传统方法开髓并探查近颊第二根管口(MB2),未能发现MB2者改良髓腔形态后继续探查,最后在牙科显微镜下采用超声技术对肉眼未能发现MB2的离体牙进行最终探查和确认。结果上颌第一恒磨牙近颊第二根管发现率为81.6%,其中传统方法探查发现率为31.6%,改良髓腔形态后在肉眼条件下MB2的发现率增至61.8%,使用牙科显微镜又使MB2的最终发现率提高至81.6%。近颊两根管口的间距为(1.42±0.51)mm。结论显微超声技术有助于发现较隐匿的MB2根管口,对于完善根管治疗具有较大临床意义。Objective To observe the effect of the dental operative microscope（DOM） and the ultrasonic apparatus in detecting the mesiobuccal root canal orifice of the maxillary first permanent molar（MFPM）. Methods According to traditional method,the pulp chamber was opened and the second mesiobuccal root canals（MB2） were explored in 76 MFPM teeth.If MB2 was not found,then we modified the shapes of the pulp chambers and detected the orifices.At last,MB2,not found under naked eyes,was explored with DOM and ultrasonic technique. Results The detection rate of the second mesiobuccal orifice of MFPM was 81.6%.The rate was only 31.6% when using traditional method,while after modifying the shapes of the pulp chambers there was an increase of 30.2% under naked eyes and then another 19.7% increase was obtained by using DOM and ultrasonic apparatus.The distance between two mesiobuccal root canal orifices was（1.42±0.51） mm. Conclusion It is helpful to find some invisible orifice of MB2 by using DOM and ultrasonic technique,and it would be beneficial to improve the root canal therapy.

关 键 词：上颌第一恒磨牙 近颊第二根管 显微超声技术 

分 类 号：R781.05[医药卫生—口腔医学]