微种植体支抗压低上前牙治疗露龈笑  

Gummy smile correction by intruding the upper anterior teeth with mini-implant anchorage: a clinical study

作　　者：麦志辉[1] 卢红飞[1] 黄晓[1] 单小年[1] 艾虹[1] 

机构地区：[1]中山大学附属第三医院口腔科,广州510630

出　　处：《中华口腔医学研究杂志（电子版）》2012年第6期35-38,共4页Chinese Journal of Stomatological Research(Electronic Edition)

基　　金：广东省自然科学基金(7001570)

摘　　要：目的探讨应用微种植体支抗治疗上前牙槽骨垂直向发育过度的露龈笑患者,改善牙龈显露的程度。方法选取16例因上前牙槽骨垂直向发育过度导致露龈笑的患者,在侧切牙与尖牙间植入微种植体支抗,施加100g力压低上前牙。治疗前后分别收集头颅定位侧位片、上前牙的根尖片、牙模型、微笑时面下1/3照片及上前牙的龈沟深度;对实验结果进行统计分析。结果压低时间为(6.7±1.2)个月。(1)牙龈显露减少(2.3±0.5)mm;(2)头影测量分析显示,上中切牙阻力中心点压低(2.6±0.3)mm,覆减少(2.8±0.6)mm,切缘与腭平面的距离减少(3.1±0.7)mm,鼻唇角增加(5.4±2.9)°,P<0.05;(3)压低结束时,上前牙的临床牙冠变短,未见明显牙根吸收。结论应用微种植体支抗可以有效地压低上前牙,改善露龈笑,但牙龈的改建速度比牙齿的压低速度慢。Objectives To correct gummy smile of the patients with anterior alveolar vertical excess by using mini-implant anchorage. Methods Sixteen patients with gummy smile due to anterior alveolar excess were chosen for this clinical study. Mini-implants were implanted between the lateral incisor and the canine, and 100 g force was applied to intrude the upper anterior teeth. Records, including models, lateral cephalograms, periapical X-ray films and photos of the lowest one third of smile face, were taken before and after the treatment. Gingival exposure, gingival sulcus depth, clinical crown length and root absorption were also measured. All experimental data were collected and statistical analysis was performed. Results （1） The gingival exposure was decreased （2.3±0.5） mm, ranging from 1.8 to 3.1 mm. （2） The cephalometric analysis showed that the resistance center point of the upper central incisor was intruded （2.6 ± 0.3） mm, the overbite was reduced （2.8±0.6） mm, the distance between the edge and the palate plane was decreased （3.1 ± 0.7） mm, and the nasolabial angle was increased （5.4 ±2.9）° （P〈 0.05）. （3） The clinical crowns of anterior teeth were significantly reduced, but there was no obvious root absorption. Conclusions Gummy smile can be corrected by intruding upper anterior teeth with mini-implant anchorage. However, the gingival reconstruction lags behind the intrusion of upper anterior teeth at the same processing time.

关 键 词：露龈笑 微种植体支抗 压低 

分 类 号：R783.5[医药卫生—口腔医学]