在畸形融合牙中,乳磨牙融合畸形滞留者较为少见,我科曾见到1例,现报道如下。患者男,15岁,学生。1988年7月15日因右下颌后牙发育异常,冠周红肿、溢脓而就诊我科,患者既往无特殊重病史,其父母及妹妹也无牙颌畸形和口 In the deformity fusion teeth, molars mixed deformity retention are rare, our department had seen 1 case, are reported below. Patient male, 15 years old, student. July 15, 1988 due to abnormal development of the right lower jaw posterior teeth, periapical redness, overflow pus and treatment of our department, the patient had no previous history of serious illness, his parents and sister also no dental deformity and mouth