Shi Jian-jun
Department of Operative Dentistry and Endodontics, Chengde Stomatological Hospital, Chengde, Hebei Province, China.
Shanghai Kou Qiang Yi Xue. 2013 Jun;22(3):358-60.
Maxillary first molar with two palatal canals is rare. Clinicians should be aware of the normal anatomy of root canal system and vigilant about the possible existence of canal variation. A patient with acute episode of chronic pulpitis of 26, as presented by the case report, was examined to have four canals, which were the mesial buccal canal, the distal buccal canal, the mesial palatal canal and the distal palatal canal. When suspecting the existence of canal variation, clinicians should carefully explore the pulpal floor, further by changing the X-ray projection angle to confirm the existence of variation and prevent the missed canals, all of which are necessary for a successful root canal therapy.
有两个腭侧根管的上颌第一磨牙很罕见。临床医生应了解根管系统的正常解剖结构，并警惕根管变异的可能存在。如病例报告所示，一名患有26号牙慢性牙髓炎急性发作的患者经检查有四条根管，即近中颊侧根管、远中颊侧根管、近中腭侧根管和远中腭侧根管。当怀疑存在根管变异时，临床医生应仔细探查髓室底，进一步通过改变X线投照角度来确认变异的存在并防止遗漏根管，所有这些对于根管治疗的成功都是必要的。
