牙冠延长术临床应用及牙龈缘短期内位置变化观察

目的：观察以生物学宽度为原则的改良牙冠延长术临床效果以及术后短期内牙龈缘位置变化的情况。方法收集17例行牙冠延长术患者22颗患牙的临床资料，对比观察术前及术后牙龈健康状况，牙龈缘位置变化情况、前牙美观效果。结果14例19颗牙齿患者主观评价良好，患牙无松动、叩痛，牙龈无炎症，X线片影像无异常。牙龈缘位置在术后1周为轻度水肿位于预期位置的冠方；在术后4周，6周龈缘位置稳定健康位于预期位置。结论以生物学宽度为基准开展的改良牙冠延长术能满足修复的要求及牙龈的稳定和健康，同时可以满足美观的需求。

Clinical application of crown lengthening surgery and the change of gingiva margin position initial study in a short time

Objective To observe the clinic result of crown lengthening surgery by the biological principle and the location -al change of gingival margin .Methods We collected the clinic dates of 17 cases 22 teeth and compared with the sanitary condition and the location of gingival margin between dates of pre -surgery and post -surgery.Results For 14 cases 19 teeth the subjective evaluation was well , the degree of tooth mobilization was normal , touching tooth showed no pain , it was no gingival infection and X -ray picture showed no abnormal image .The location of the gingival margin showed a little edematous at 1 week pose-surgery;at 4 week and 6 week post -surgery, the location of the gingival margin showed the prospective site .Conclusion The crown lengthening surgery by biological width principle could get stable location of gingi -val margin and health , simultaneously , it could meet the demand of aesthetics .