华西口腔医学杂志

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3种减数方案矫治双颌前突高角病例的临床研究

代佳音 张苗苗  孙苗  倪辉   

  1. 哈尔滨医科大学口腔医院正畸科, 黑龙江哈尔滨150001
  • 收稿日期:2009-06-25 修回日期:2009-06-25 出版日期:2009-06-20 发布日期:2009-06-20
  • 通讯作者: 张苗苗,Tel:13904515636
  • 作者简介:代佳音(1984-),女,黑龙江人,硕士

Treating high angle bimaxillary protrusion with three kinds of extraction method:A clinical study

DAI Jiayin, ZHANG Miao-miao, SUN Miao, NI Hui   

  1. Dept. of Orthodontics, College of Stomatology, Harbin Medical University, Harbin 150001, China
  • Received:2009-06-25 Revised:2009-06-25 Online:2009-06-20 Published:2009-06-20
  • Contact: ZHANG Miao-miao,Tel:13904515636

摘要:

目的比较3种减数方案矫治双颌前突高角病例的临床疗效。方法选取14~25岁安氏Ⅰ类高角的双颌前突患者共30例为研究对象,分为3组,每组10例。Ⅰ组拔除4颗第一前磨牙;Ⅱ组拔除上颌2颗第一前磨牙及下颌2颗第一磨牙;Ⅲ组拔除上颌2颗第一前磨牙及下颌2颗第一磨牙,并在上颌2颗第一磨牙的近中分别种植2枚微型种植体。使用直丝弓矫治技术进行矫治。对3组患者治疗前后的头颅侧位X线片进行头影测量分析,并对结果进行统计学分析。结果1)硬组织方面,矫治后Ⅱ、Ⅲ组的前面高、后面高与前面高之比、前下面高、眶耳平面与下颌平面交角、前颅底平面与下颌平面交角、ODI值的变化与Ⅰ组相比,其差异均有统计学意义(P<0.01)。2)软组织、牙齿及牙槽方面,矫治后Ⅱ、Ⅲ组的颏厚度、下唇凸度、颏唇沟深度、LL-E、L1-NB、L1/NB、U1/L1、L7-MP的变化与Ⅰ组相比,其差异均有统计学意义(P<0.01)。3)所有患者均得到完善的正畸治疗,矫治后后牙咬合关系良好,前牙覆覆盖正常,软组织侧貌协调。结论1) 拔除下颌第一磨牙可使下颌平面角变小,前面高及前下面高降低,下颌切牙后缩明显,相应的软组织改变较好;2)上颌附加使用微型种植体支抗更有利于上颌切牙内收和继发的软组织改善;3)矫治高角双颌前突患者时,拔除第一磨牙并使用微型种植体支抗可有效改善患者的面部外型轮廓。

关键词: 减数方案, 矫正, 双颌前突, 高角

Abstract:

Objective To compare the effect of three kinds of extraction model on high angle bimaxillary protrusion patients. Methods A total of 30 patients with Class Ⅰ malocclusion and bimaxillary protrusion, aged 14-25 years old, were selected and divided into three groups. Four first premolars were extracted in the first group. The two maxillary first premolars and two mandibular first molars were extracted in the second group. The two maxillary first premolars and two mandibular first molars were extracted in the third group, and two additional micro-implants used as orthodontic anchorage in maxilla. Three groups were all treated with MBT appliance. Cephalometric analysis were carried out before and after treatment, and the results were analyzed with statistics. Results 1)About the hard tissues, compared with the first group, there were statistically significant differences of N-Me, SGo/NMe, ANS-Me, FH/ MP, SN/MP, and ODI in the second and the third group after treatment(P<0.01). 2)About the soft tissues, the teeth and the alveolar bone, compared with the first group, there were statistically significant differences of Pg-Pos, Li- SnPos, Si-LiPos, LL-E, L1-NB, L1/NB, U1/L1, L7-MP in the second and the third group after treatment(P<0.01). 3)All patients received consummate orthodontic treatment and obtained fine occlusion. Facial profiles were improved significantly after orthodontic treatment. Conclusion 1)After orthodontic treatment with mandibular first molars extraction, FH/MP, SN/MP, N-Me, ANS-Me, L1-NB and L1/NB decreased respectively, and soft tissue profiles were improved significantly. 2)Additional micro-implant used as orthodontic anchorage in maxilla significantly contributed to the maxillary incisor retraction and subsequent soft tissue change. 3)The first molars extraction and additional micro- implant used as orthodontic anchorage are efficient in improving the facial profiles for high angle bimaxillary protrusion patients.

Key words: extraction model, corrective, bimaxillary protrusion, high angle