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中华口腔医学研究杂志(电子版) ›› 2024, Vol. 18 ›› Issue (01) : 43 -47. doi: 10.3877/cma.j.issn.1674-1366.2024.01.007

病例分析

上颌第二磨牙单根双腭管并四根管融合1例
高现灵, 龚启梅, 林正梅()   
  1. 中山大学附属口腔医院,光华口腔医学院,广东省口腔医学重点实验室,广东省口腔疾病临床医学研究中心,广州 510055
  • 收稿日期:2023-08-05 出版日期:2024-02-01
  • 通信作者: 林正梅

One root with two palatal canals and four canals fused into one in the maxillary second molars: Case report

Xianling Gao, Qimei Gong, Zhengmei Lin()   

  1. Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangdong Provincial Clinical Research Center of Oral Diseases, Guangzhou 510055, China
  • Received:2023-08-05 Published:2024-02-01
  • Corresponding author: Zhengmei Lin
  • Supported by:
    National Natural Science Foundation of China(82001096)
引用本文:

高现灵, 龚启梅, 林正梅. 上颌第二磨牙单根双腭管并四根管融合1例[J]. 中华口腔医学研究杂志(电子版), 2024, 18(01): 43-47.

Xianling Gao, Qimei Gong, Zhengmei Lin. One root with two palatal canals and four canals fused into one in the maxillary second molars: Case report[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2024, 18(01): 43-47.

上颌第二磨牙(MSM)牙根及根管系统的数目、形态均变异较大,牙根融合和颊侧第二根管是常见的变异。本文报告1例罕见的MSM解剖变异,经锥形束计算机体层扫描证实为单牙根,双腭管,且4个根管在根尖区融合为1个根管。

The roots and roots canal system vary greatly in the maxillary second molars (MSMs), where root fusion and the second mesiobuccal canal (MB2) are common variations. This case reported a rare anatomical variation of MSMs, confirmed by cone beam computed tomography (CBCT), which was one single conical root, 2 palatal canals and 4 canals fused into one at the apical region.

图1 上颌第二磨牙单根双腭管并四根管融合患者首次就诊口腔全景曲面体层片
图2 上颌第二磨牙单根双腭管并四根管融合患者27根管预备后2个腭根合并呈带状 MB:近颊根管;DB:远颊根管;P:腭侧根管。
图3 上颌第二磨牙单根双腭管并四根管融合患者27治疗中的锥形束CT(CBCT)图像 A:横断面;B:矢状面;C:冠状面;MB:近颊根管;DB:远颊根管;P:腭根管;P2:第二腭根管。
图4 上颌第二磨牙单根双腭管并四根管融合患者27三维影像重建图像 A:矢状面;B:横断面;C:冠状面;D:根管三维重建;E:牙体近中面;F:牙体颊侧面;G:牙体腭侧面。
图5 上颌第二磨牙单根双腭管并四根管融合患者17三维影像重建图像 A:矢状面;B:横断面;C:冠状面;D:根管三维重建;E:牙体近中面;F:牙体颊侧面;G:牙体腭侧面。
图6 上颌第二磨牙单根双腭管并四根管融合患者27根管充填后图像资料 A:根充后根管口;B:根充后X线片;C:根尖端充填模式图。
图7 上颌第二磨牙单根双腭管并四根管融合患者27冠修复过程 A ~ B:术前口内照;C:制备纤维桩并牙体预备后;D ~ E:数字化印模照;F:临时冠;G ~ H:修复体;I:修复体就位后。
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