中切牙间两颗多生牙引起牙列拥挤错位的矫治王元英，于淑艳，吴淑萍一、典型病例男，１５岁，恒牙列中切牙之间两颗多生牙呈圆锥形，之间间隙９ｍｍ，位于唇侧稍偏向远中重叠，所差间隙８．５ｍｍ，切牙浅覆浅覆盖，磨牙中性关系，无遗传史，Ｘ线片显示前牙牙根发育正常。... Two more teeth between the interdental dentition caused crowding misalignment Wang Yuanying, Yu Shuyan, Wu Shuping First, the typical case of male, 15 years old, permanent dentition in the two teeth between the condyles were conical, the Between the gap 9mm, located on the labia side slightly far to overlap, the gap 8.5mm, shallow shallow shallow incisor moss, molars, no genetic history, X-ray film showed normal root anterior tooth root development. ...