INCIDENCE AND CONFIGURATION OF CANAL SYSTEMS IN THE MESIOBUCCAL ROOT OF MAXILLARY 1ST-MOLARS AND 2ND-MOLARS
INCIDENCE AND CONFIGURATION OF CANAL SYSTEMS IN THE MESIOBUCCAL ROOT OF MAXILLARY 1ST-MOLARS AND 2ND-MOLARS
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DOI：
10.1016/s0099-2399(06)81940-0
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发表时间：
1990-07-01
影响因子：
4.2
通讯作者：
PETERS, DD
中科院分区：
文献类型：
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作者：
KULILD, JC;PETERS, DD
对5颗上颌第一磨牙和32颗上颌第二磨牙的近颊根进行了解剖学研究。最初，试图使用标准的通道和手持器械定位所有的根管。然后仔细地使用钻头来定位任何额外的第二近颊(近舌)管。最后，拔冠后，以1 mm的增量水平缩小牙齿，在显微镜下观察。第二根管位于95.2%的根管冠侧，其中手动根管占54.2%，BUR根管占31.3%，显微镜根管占9.6%。当按照所述方式使用钻头时，没有牙根穿孔。ML根管开口与MB根管开口的舌侧距离平均为1.82 mm。第一磨牙和第二磨牙之间ML根管的发生率差异无统计学意义。类型1占4.8%，类型2占49.4%，类型3占45.8%。
The anatomy of the mesiobuccal (MB) root of 5I maxillary first and 32 maxillary second molars was studied. Initially, and attempt was made to locate all canals using a standard access and hand instruments. A bur was next used carefully to locate any additional second mesiobuccal (mesiolingual (ML)) canals. Finally, after crown removal, the teeth were reduced horizontally in 1-mm increments and examined by microscope. A second ML canal was located in the coronal half of 95.2% of the roots: by hand instruments in 54.2%; bur in 31.3%; and microscope in 9.6%. There were no root perforations when the bur was used as described. The ML canal orifice averaged 1.82 mm lingual to the MB canal orifice. The difference in incidence of ML canals between the first and second molars was not statistically significant. The canal systems were type 1, 4.8%; type 2, 49.4%, and type 3, 45.8%.