上颌第二磨牙多为三根,虽有变异,但牙根呈角度的弯曲变异罕见,我们在临床拔牙时发现1颗此类变异牙,现报道如下。患者,男,49岁。因下后牙缺失,上后牙伸长,影响进食,要求拔除上颌第二磨牙。局麻下拔除该牙,大体观该牙三个牙根,完整。近远中颊根逐渐向远中颊侧弯曲,其中近中颊根在根1/2 Most of the second maxillary maxillary three, although the variation, but the angle of the root bending is rare, we found one such variant teeth in the clinical extraction, are reported below. Patient, male, 49 years old. Due to the loss of the lower posterior teeth, elongated teeth on the back, affecting eating, requiring removal of the maxillary second molars. Local anesthesia removal of the tooth, the general view of the root three teeth, complete. The mesial buccal root gradually bends toward the far-mid-buccal side, with the mesiobuccal root at the root 1/2