微小种植体支抗压低前牙改善露龈笑的临床研究

目的：评价利用微小种植体作为支抗压低前牙改善露龈笑的临床效果。方法：选取我科室9例（男5例,女4例）前牙过长,开唇露齿露龈笑的深覆病例,年龄18.6～28.3岁,平均24.7岁。9例患者前牙区存在II度或III度深覆,5例病例伴有不同程度的牙列前突。9例患者在佩戴固定戴矫治器后在上、下颌前牙区相应部位植入微小种植体,治疗前后拍摄全口曲面断层片进行测量对比,观察切牙的变化和改善露龈笑的情况。结果：9例患者治疗前后上下颌前牙均有不同程度的压低,上颌前牙平均压低3.8mm,下颌切牙平均压低3.0mm,深覆得到有效的治疗,同时露龈笑有一定程度的改善。其中2例患者出现一定程度的牙根吸收。结论：利用微小种植体支抗能有效地治疗前牙过长开唇露齿,达到真正压低前牙解除深覆的效果。

Clinical Application of Miniscrew Implant anchorage for Intruding upper incisors in patients with gummy smile

Objective This study aims to evaluate the clinical effect of improving gummy smile by micro-implant anchorage for the anterior teeth intrusion.Methods 9 patients have been diagnosed with anterior teeth Ⅱ°or Ⅲ°deep overbite with gummy smile and incompetent lips,5 males and 4 females,aged from 18.6 to 28.3 years,with the average of 24.7 years and 5 patients presents with protruding anterior teeth.Miniscrew Implants are inserted into the situation with fixed orthodontic appliances.Results All patients are taken panoramic radiograph before and after treatment.The edges of maxillary incisors are avergely intruded 3.8mm and mandibular incisors are avergely intruded 3.0mm.There are some degree of root resorption in 2 patients.Conclusion Miniscrew Implant anchorage can provide necessary anchorage to retract the front teeth in the clinical treatment of gummy smile and incompetent lips.