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具有四个牙根和五条根管的上颌第二磨牙。

Maxillary second molar with four roots and five canals.

作者信息

Sha Xinjia, Sun Hantang, Chen Jinwu

机构信息

Department of Dentistry for Special Services, School of Stomatology, The Fourth Military Medical University (FMMU), Xi'an, China.

Department of Operative Dentistry and Endodontics, School of Stomatology, FMMU, Xi'an, China.

出版信息

J Dent Sci. 2018 Jun;13(2):167-171. doi: 10.1016/j.jds.2012.04.007. Epub 2013 Apr 29.

DOI:10.1016/j.jds.2012.04.007
PMID:30895113
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6388827/
Abstract

In this case report, we present a maxillary second molar variant, which had two palatal roots with two canals and two buccal roots with three canals, including a second mesiobuccal canal. A 44-year-old female patient complained about a tooth crown fracture and severe pain in her right maxillary second molar. A clinical intraoral inspection and radiography were carried out on the tooth, and a diagnosis of chronic apical periodontitis was made. Four roots (two buccal and two palatal) and five canals (three buccal and two palatal) were found. The anatomical variation of the tooth was further confirmed by cone-beam computed tomography, a cone-fit procedure, and a radiograph with a shifted projection angle. Root-canal treatment was performed under an endodontic microscope.

摘要

在本病例报告中，我们展示了一颗上颌第二磨牙变异体，其有两个腭根且有两个根管，两个颊根且有三个根管，包括一个近中颊侧第二根管。一名44岁女性患者主诉其右上颌第二磨牙牙冠折断及剧痛。对该牙进行了临床口腔检查和影像学检查，诊断为慢性根尖周炎。发现了四个牙根（两个颊根和两个腭根）和五个根管（三个颊根管和两个腭根管）。通过锥形束计算机断层扫描、根管预备操作以及具有偏移投照角度的X线片进一步证实了该牙的解剖变异。在牙髓显微镜下进行了根管治疗。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/5dd7d7ade663/gr9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/b23f8e2c4a65/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/1ec6d5e7021b/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/98d0b5b0165b/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/b8ecea981939/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/369b59e7bee3/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/b74ad30fb09d/gr6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/08f77c36d9dd/gr7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/3b1f901e18a0/gr8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/5dd7d7ade663/gr9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/b23f8e2c4a65/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/1ec6d5e7021b/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/98d0b5b0165b/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/b8ecea981939/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/369b59e7bee3/gr5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/b74ad30fb09d/gr6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/08f77c36d9dd/gr7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/3b1f901e18a0/gr8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02c3/6388827/5dd7d7ade663/gr9.jpg

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CBCT technology: endodontics and beyond, part I.锥形束计算机断层扫描技术：牙髓病学及其他领域，第一部分
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