组合微螺钉种植支抗压低下颌伸长磨牙的初步研究  

Pilot study of efficiency of connected miniscrews as anchorage for lower molar intrusion

作　　者：毛慧霞 李峰 李玮 元志昌 武建潮[4] 

机构地区：[1]浙江省江山妇幼保健院口腔科,江山324100 [2]台州中医院口腔科,台州318000 [3]武义县人民医院口腔科,武义321200 [4]浙江大学医学院附属第二医院口腔矫形科,杭州310009

出　　处：《口腔医学》2013年第4期229-231,共3页Stomatology

基　　金：浙江省卫生厅(2011KYA064);浙江省教育厅(Y201121328)

摘　　要：目的初步评价利用组合微螺钉种植体支抗压低下颌伸长磨牙的临床效果。方法选择3例下颌磨牙伸长患者,在伸长磨牙颊侧植入2枚微型种植体,取2段0.48 mm×0.64 mm不锈钢方丝,焊接并弯制成带有颊舌侧牵引钩的连接杆,用光固化树脂将其固定于2颗种植体头部,使2颗种植体连接成为一个整体,并且颊舌侧牵引钩正好位于伸长磨牙的颊舌侧根尖水平处。作支抗压低伸长磨牙,治疗前后拍摄头颅侧位定位片,测量比较磨牙在矫治前后的压低量。结果所有种植体植入过程顺利,在治疗过程中未出现松动脱落。舌侧牵引钩经过5个月左右的治疗,3例患者伸长的下颌磨牙压低明显,达3～4mm。压低后磨牙未见明显松动,且颊舌向转矩正常,未出现舌尖或颊尖伸长现象,也未发现明显的牙根吸收与牙髓坏死,牙周状况良好。结论应用组合微螺钉种植支抗能有效地压低下颌伸长磨牙。Objective To study the efficiency of connected miniscrews as anchorage for lower molar intrusion. Methods 3 pa- tients with overerrupted lower molars were selected. Two miniscrcws were placed on the buccul side of overerrupted molars. 2 straight O. 48 mm x 0.64 mm orthodontic stainless steel archwires were welded. The distal ends of the wores were bent to form hooks stretching to the buccal lingual sides of the overerrupted molars at the apical level. The stainless steel archwires were fixed to the heads of the two im- plants with light - cured resin to make the two implants into a whole as anchorage for lower molar intrusion. Lateral cephalograms were taken before and after the treatment. Measure and compare the length of intrusion. Results All the implantation was successful and there was no tooth mobility in the treatment. After 5 months＇ treatment, obvious intrusion of lower overerrupted molars could be observed in 3 cases, which reached 3-4 mm. No obvious mobility was oberved on the molars after intrusion. The buccal lingual torque was nor- mal. There was no elongaion, no obvious root resorption or pulp necrosis. The periodontal condition was well. Conclusions Connected miniscrews can be effective anchorage to lower overerupted mandibular molars.

关 键 词：微型种植体 正畸支抗 伸长磨牙 压低 

分 类 号：R783.5[医药卫生—口腔医学]