孪生姐妹同患下颌前突畸形一例矫治报告程丽一、典型病例：张娜、张伟，女，７．５岁，因同患＂地包天＂而要求矫治。姐妹俩面形十分相似。追问病史，其祖父有下颌前突畸形。患者母诉两人幼儿时曾用奶瓶喂奶。检查：姐妹俩均是凹面型，下颌都能退至前牙对刃，均为替牙。张... Twin sisters with suffering from mandibular protrusion deformity in a case of treatment report Cheng Li a typical case: Zhang Na, Zhang Wei, female, 7.5 years old, suffering from the disease “to the sky” and require correction. Sisters face is very similar. Asked history, his grandfather had mandibular protrusion deformity. The patient sued two young children fed milk bottles. Check: The sisters are concave type, the jaw can retreat to the front teeth on the blade, all for the teeth. Zhang ...