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- W2372670695 abstract "Objective:To evaluate the clinical treatment of second mesiobuccal canals(MB2 canal)of maxilarry first molars missed in initial endodontic treatment using dental operating microscope (DOM). Method:64 maxillary first molars which need endodontic 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% NaOCI and 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 maxillary first molar was 85.81% in endodontic retreatment while negotiate rate was 80%.2-1type and 2-2 type were the main type of mesiobuccal root canals(76.56%). There were no obvious complications during operation. 95.55% MB2 canals were obturat- ed successfully. Conclusion:The incidence of MB2 canals in maxillary first molars was high. Most of MB2 canals were fine, curved and concealed. The managment of searching for MB2 canals and the increased visibility afforded with the use of DOM can make the treatment more successful." @default.
- W2372670695 created "2016-06-24" @default.
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- W2372670695 date "2009-01-01" @default.
- W2372670695 modified "2023-09-23" @default.
- W2372670695 title "Endodontic retreatment of untreated second mesiobuccal canals in treated maxillary first molars" @default.
- W2372670695 hasPublicationYear "2009" @default.
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