欧米加阻挡曲扩弓法排齐和整平下颌拥挤牙列效果的临床研究  

Clinical study of alignment and leveling of mandibular crowding arch with the omega loop arch-expanding method

作　　者：李洁 李勇[2] 李福军[2] 

机构地区：[1]武汉市江夏区中医院,武汉430200 [2]武汉大学口腔医院,武汉430079

出　　处：《口腔材料器械杂志》2017年第2期79-84,共6页Chinese Journal of Dental Materials and Devices

基　　金：湖北省自然科学基金(编号:2012FFB04416)

摘　　要：目的评价下颌非拔牙病例中,澳丝弯制的欧米加阻挡曲扩弓法在传统直丝弓托槽上排齐和整平下颌拥挤牙列方面的临床效果。方法选择58例正畸患者,年龄19~24岁,随机均分成2组,各29例,一组接受传统矫治方法,另一组采用欧米加阻挡曲扩弓法矫治。每种矫正方法又分为轻-中度拥挤(5>Ⅱ>2)和重度拥挤(Ⅱ>5)两个亚组。下颌治疗结束时间以下牙弓完全排齐和整平为准。头颅侧位片评价下牙弓排齐和整平前后下切牙位置的变化;模型上测量下尖牙间距和下第一恒磨牙间距以反映牙弓宽度的变化。结果 2种排齐和整平的方法获得了相同程度的前牙区和后牙区扩弓量;就重度拥挤病例而言,欧米加阻挡曲扩弓法要明显快于传统方法(P=0.017);结论 2种方法无论在切牙的唇向移动程度还是尖牙间距和磨牙间距的扩大情况等各方面几乎获得了同样的效果,对于严重拥挤的牙列,欧米加阻挡曲扩弓装置显示出更高的效率,是非常值得推荐的一种矫正方法。Objective The objective of this study was to compare the effectiveness of the omega loop arch-expanding method with conventional twin brackets during initial alignment and leveling of non-extraction cases. Methods Fifty-eight subjects were selected from a pool of patients meeting the following inclusion criteria： non-extraction treatment in the mandibular arches; eruption of all mandibular teeth; no Bolton index discrepancy between top and bottom arch;irregularity index greater than 2 in the mandibular arch; and no therapeutic intervention planned with any extraoral or intraoral appliance. Patients were randomly assigned to 2 groups, patients in one group received treatment based on the Q arch-expanding method, and patients in the other group received treatment based on conventional methods with same edgewise appliances, and all patients were further categorized according to the irregularity index, mild-moderate crowding （2〈irregularity index 〈5） and severe crowding （5〈irregularity index）. The irregularity index of the mandibular arch was normalized between groups, and the time for alignment and leveling was estimated in weeks. Lateral cephalometric radio graphs were used to assess the alteration of mandibular incisor position before and after treatment. The measurement of intercanine and intermolar width was also made on dental casts to determine changes associated with correction. Results Overall, the two groups showed similar changes in incisors proclination, and intercanine and intermolar width. For severe crowding cases, however, faster correction was achieved using the Ω arch-expanding method （P=0.017）. Conclusion Both methods achieved comparable effectiveness regardless of the increase in intercanine and intermolar width or proclination of the mandibular incisors associated with crowding correction, The Ω archexpanding method group showed faster correction than the conventional method group for severe crowding mandibular arch.

关 键 词：欧米加 阻挡曲扩弓 排齐和整平 临床效果 

分 类 号：R783.5[医药卫生—口腔医学]