人类恒磨牙的牙根变异为甲根牙,常见于上、下颌第三磨牙。而笔者遇到一例发生在上颌双侧对称性第一,二恒磨牙的特殊病例,现报告如下。患者,女,47岁。因上颌磨牙肿痛2天就诊。口腔检查:(?)深龋。(?)颊侧牙龈及移行区粘膜红肿,压痛明显,无波动,牙周袋4mm。袋内有脓液分泌物,松 The root of human molar molars mutation is a root tooth, common in upper and lower jaw third molars. The author encountered a case of maxillary bilateral symmetry in the first, two permanent molars special cases, are as follows. Patient, female, 47 years old. Due to maxillary molar tooth pain 2 days treatment. Oral examination: (?) Deep caries. (?) Buccal gingival and transitional mucosal swelling, tenderness, no fluctuations, periodontal pocket 4mm. Pouch secretions, loose