下颌第一磨牙有 6 个独立根管。
Mandibular first molar with six separate canals.
机构信息
Department of Restorative Sciences, Division of Endodontics, University of Minnesota School of Dentistry, 8-166 Moos Tower, 515 Delaware Street SE, Minneapolis, MN 55455, USA.
出版信息
J Endod. 2011 Jun;37(6):878-80. doi: 10.1016/j.joen.2011.03.005. Epub 2011 May 6.
INTRODUCTION
Many anatomical variations can occur within the mandibular first molar. Commonly, 3-4 canals are located, but as many as 6-7 canals have been reported.
METHODS
This report describes a case of a mandibular first molar with 6 separate canals (3 mesial and 3 distal) that was instrumented with conventional hand and rotary files and obturated by using a hybrid warm vertical compaction technique.
RESULTS
Recall examination as far as 3 years post-treatment found no sensitivity to percussion or palpation and recall radiographs after treatment show resolution of the previous apical periodontitis.
CONCLUSIONS
The existence of such teeth as these underlies the importance of looking for additional canals.
引言
下颌第一磨牙可能存在多种解剖变异。通常有 3-4 个根管，但也有多达 6-7 个根管的报道。
方法
本报告描述了一例下颌第一磨牙有 6 个单独的根管（3 个近中根管和 3 个远中根管），采用传统的手用和机用器械进行预备，并使用混合热垂直加压技术进行充填。
结果
治疗后 3 年的复查显示无叩诊和触诊敏感，治疗后的复查 X 线片显示先前的根尖周炎得到了缓解。
结论
这些牙齿的存在凸显了寻找额外根管的重要性。
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