无托槽隐形矫治技术压低前牙的效率分析  

A clinical study evaluating the efficiency of intrusion in anterior teeth by clear aligner technique

作　　者：宋保龙 王鹏[2] 李丹[3] 田杰 顾泽旭 Song Baolong;Wang Peng;Li Dan;Tian Jie;Gu Zexu(State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases &Shaanxi Clinical Research Center for Oral Diseases & Department of Orthodontics, Schoolof Stomatology,The Fourth Military Medical University,Xi'an 710032,China;Departmentof Stomatology,No.210 Hospital of PLA 116021 ,China;Department of Quality Control,the First Hospital of PLA,Lanzhou 730030,China;Angle-align Company ,Shanghai 200122,China)

机构地区：[1]军事口腔医学国家重点实验室,口腔疾病国家临床医学研究中心,陕西省口腔疾病临床医学研究中心,第四军医大学口腔医院正畸科,西安710032 [2]解放军第210医院口腔科,大连116000 [3]解放军第一医院质控科,兰州730000 [4]时代天使生物科技有限公司,上海200122

出　　处：《中华口腔正畸学杂志》2018年第4期186-190,共5页Chinese Journal of Orthodontics

基　　金：西安市社会发展引导计划(2016051SF/YX07).

摘　　要：目的通过数字化模型三维重叠技术,分析患者治疗前后的牙齿位置变化,研究隐形矫治对前牙在不同移动方式下的压低效果。方法在隐形矫治成人患者中,选取需要进行压低的前牙101颗,按照牙位及牙齿内收情况进行分组。通过三维扫描获得患者治疗前及阶段治疗后的数字化模型,使用模型重叠技术分析前牙在不同移动方式下的压低效率。采用独立样本及配对样本的t检验对比组间差异及设计压低数据与实际压低数据之间有无差别。结果非内收时,隐形矫治器对牙齿的平均压低效率为46.9%,其中下颌侧切牙的压低效率最高(54.6%),上颌中切牙次之(50.9%),上颌尖牙的压低效率最低(28.8%),上颌侧切牙、下颌中切牙、下颌尖牙的压低效率分别为34.6%、48.1%、42.4%。内收配合压低时,牙齿的平均压低效率(-15.4%)差异显著(P<0.01),牙齿会出现伸长。结论隐形矫治压低前牙时应适当增加过矫治,尤其在同步内收时应增加压低量,以防止牙齿的伸长。ObjectiveThe purpose of this clinical study was to evaluate the efficacy of anterior intrusion with clear aligners.MethodsThe study included 22 patients and 101 anterior teeth (44 maxillary and 57 mandibular) treated with clear aligners. To analyze the clinical efficiency, pre-treatment and post-treatment plaster cast models were laser-scanned and the tooth movements in practice were obtained by digital model superimposition. The results were compared with the amount of tooth movement predicted by clear aligners. Intra-group comparsion were made by a paired t-test.ResultsThe mean accuracy of intrusion with clear aligners was 46.9%. The most accurate intrusion was in mandibular lateral incisors (54.6%), followed by maxillary central incisor (50.9%), and the least accurate tooth was maxillary canines (28.8%). When the teeth were in the process of constriction, the accuracy of intrusion movement would decline and significantly difference(-15.4%, P<0.01)was noted, and the teeth would move as extrusion.ConclusionsOvercorrection should be considered in anterior intrusion using aligners, especially in the process of constriction to reduce the possibility of extrusion.

关 键 词：无托槽矫治技术 模型重叠 牙齿压低 移动效率 

分 类 号：R783.5[医药卫生—口腔医学]