Abstract:
AIM:The aim of this study was to determine the percentage of anatomical canal configurations of the mesiobuccal root of the maxillary first molar in Japanese patients. METHODOLOGY:Three hundred teeth were obtained from general dentists who knew absolutely that they were extracted from Japanese patients. The distobuccal and palatal roots were amputated for radiographic convenience. Preoperative radiographs were taken of the remaining crown and mesiobuccal root (MBR) from mesiodistal and buccopalatal directions for each tooth. Routine endodontic access cavities were prepared and size 08 files were placed through the orifice into the MBR until they were seen at the apex. In some cases preparation of the canal orifice with a long shank round burr was necessary to gain access. In seven teeth, no access to the apex was possible and these teeth were eliminated. In the other 293 teeth, the MBR canal(s) was (were) enlarged up to size 15 file. If another canal opening was found at the apex a 08 file was inserted into the second opening and passed coronally. Postoperative radiographs with file(s) in place were taken from the two directions, as before. RESULTS:Of the 293 teeth, 123 (42.0%) were Type II, 89 (30.4%) showed Type III systems and 10 (3.4%) were Type IV. Suggestions for identification and treatment of the second canal in the MBR are presented. CONCLUSIONS:The proportion of cases with two canals in the mesiobuccal root of maxillary first molars from Japanese patients was high and similar to that described from studies of other ethnic populations.
journal_name
Int Endod Jjournal_title
International endodontic journalauthors
Weine FS,Hayami S,Hata G,Toda Tdoi
10.1046/j.1365-2591.1999.00186.xkeywords:
subject
Has Abstractpub_date
1999-03-01 00:00:00pages
79-87issue
2eissn
0143-2885issn
1365-2591journal_volume
32pub_type
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pub_type: 杂志文章
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更新日期:1989-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:1994-11-01 00:00:00
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更新日期:2015-02-01 00:00:00