在临床工作中经常遇到因颌面部外伤导致前牙冠根折根面位于龈下者,保留此类患牙在实际工作中有较大困难。我院口腔科2006—2009年采用正畸牵引及桩冠修复此类患牙25例,不仅保留了患牙而且取得了良好的美观和固位效果,现报告如下。1资料与方法1.1一般资料25例共计28颗患牙,男18 In clinical work often encountered due to maxillofacial injury leading to the root anterior root crown root in the subgingival, the retention of such teeth have greater difficulties in the actual work. Stomatology in our hospital from 2006 to 2009 with orthodontic traction and crown repair 25 cases of such teeth, not only retained the teeth and has achieved good appearance and retention effect, are as follows. 1 Materials and Methods 1.1 General Information 25 cases a total of 28 teeth, male 18