上颌第一磨牙腭侧双根管1例报告

Maxillary first molar with two palatal canals:a case report

上颌第一磨牙腭侧双根管罕见,临床医师应熟悉根管系统的正常解剖,警惕可能出现的根管变异。本文报告1例左上颌第一磨牙慢性牙髓炎急性发作患者,经检查26有4个根管,分别为近中颊根管、远中颊根管、近中腭根管和远中腭根管。当怀疑患牙存在根管变异时,临床医师应仔细检查髄室底,通过改变X线投照角度,进一步确定是否存在根管变异,以明确诊断,防止遗漏根管,确保成功进行根管治疗。

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.