临床口腔医学杂志Issue(9)：568-570,571,4.DOI:10.3969/j.issn.1003-1634.2015.09.019
显微超声技术结合CBCT在上颌第一磨牙MB2根管再治疗中的应用
Clinical appliance of cone-beam computed tomography endodontic retreatment of untreated second mesiobuc-cal canals in treated maxillary first molars
摘要
Abstract
Objective:To observe the clinical feature and evaluate clinical treatment effect of second mesiobuccal canals (MB2 canal) of maxilarry first molars missed in initial endodontic treatment using cone-beam computed tomography (CBCT) and dental operating microscope (DOM). Method:The root canals of 89 maxillary first molars which need en-dodontic retreatment were selected. The existence of MB2 canal was determined by radiographs and anatomic features of crown and pulpal floor. With a thapezium path to pulp chamber,the MB2 canals were explored by a small size K file and located using a DOM when needed. The canals were instrumented by Ni-Ti rotary instruments,irrigated by 1.5 % NaOCI and 17 % EDTA were obturated by lateral condensation and vertical compaction technique. The type of mesiobuccal root canals,the in-operative complications and the obturation effect were record. Result:The frequency of MB2 canal in maxil-lary first molar was 80.89 %(72/89) in endodontic retreatment while negotiate rate was 68.54 %. most of them were fine and curved which were negotiated with small size files and EDTA. 2-1 type and 2-2 type were the main type of mesiobuc-cal root canals(67.42%). There were no obvious complications during operation. Conclusion:The incidence of MB2 canals in maxillary first molars was high,and most of them were fine and curved. The MB2 canals can be negotiated with small size file and EDTA,Most of MB2 canals were fine,curved and concealed. The management of searching for MB2 canals and the increased visibility afforded with the use of DOM can make the treatment more successful.关键词
显微超声技术/CBCT/上颌第一磨牙/MB2根管/根管再治疗Key words
dental operating microscope/cone-beam computed tomography/maxillary first molar/second mesiobuc-cal canal/endodontic retreatment分类
医药卫生引用本文复制引用
戴丽霞,刘虎,赵荣..显微超声技术结合CBCT在上颌第一磨牙MB2根管再治疗中的应用[J].临床口腔医学杂志,2015,(9):568-570,571,4.基金项目
湖南省科技厅科技计划项目 （）
