上颌磨牙近颊第二根管的定位与治疗  

Clinical feature and treatment of the second mesiobuccal canals of maxillary molars

作　　者：徐琼[1] 谷海晶[1] 凌均棨[1] 

机构地区：[1]中山大学光华口腔医学院附属口腔医院牙体牙髓科,510055

出　　处：《实用口腔医学杂志》2008年第3期406-409,共4页Journal of Practical Stomatology

基　　金：2004年卫生部部属医疗机构临床学科重点项目;"十五"国家科技攻关计划项目课题(编号:2004BA720A23)

摘　　要：目的:探讨上颌磨牙近颊第二根管(second mesiobuc calcanal,MB2)的临床发现率、特征及治疗方法。方法:选取患牙髓炎或根尖周炎的上颌第一磨牙106颗、上颌第二磨牙80颗,拍摄术前X线片,探查根管,记录根管数目、形态和类型;采用机动镍钛器械Hero642进行根管预备,侧向加压充填技术充填根管。结果:上颌第一磨牙、上颌第二磨牙MB2的发现率分别为82.1%和45.0%,多数MB2根管细小,用8或10号锉结合EDTA溶液可通畅根管。根管预备中有1枚器械折断,无其它并发症发生。结论:上颌第一磨牙MB2的发现率高于上颌第二磨牙,多数MB2根管口隐蔽,根管细小;机动镍钛器械预备可获得良好的成形效果。Objective： To discuss the clinical feature and treatment of second mesiobuccal canal （ MB2 ） of permanent maxillary molars. Methods：The root canals of 106 maxillary first molars and 80 maxillary second molars were explored with small size K files. The frequency and morphology of root canals were recorded. The canals of all cases were instrumented by Ni-Ti rotary instruments Hero 642, and obturated with lateral condensation technique. The efficiency of preparation and obturation was analyzed with radiographs before and after treatment. Resuits：The frequency of MB2 canal in maxillary first and second molars were 82.1% and 45.0%. Most MB2 was very fine and negotiated by size 8 or 10 file combined with EDTA. No transportation, ledge, or perforation was found except that one hand file was separated. Good result of treatment was achieved in most cases. Condusion： The incidence of MB2 canals of maxillary first molars was higher than that of second molars, and most of them were very fine. The MB2 canals can be negotiated with small size file combined with EDTA, and shaped well with Ni-Ti rotary instruments.

关 键 词：上颌磨牙 近颊第二根管 根管治疗 

分 类 号：R781.05[医药卫生—口腔医学]