"微种植体支抗双槽沟舌侧托槽"矫治系统前牙移动的磁感应Typodont实验  

Anterior tooth movement of micro-implant-double slot lingual bracket system with Heat Induction Typodont System

作　　者：武秀萍[1] HEE MoonKyung 李冰[1] 荆璇 李世锋[2] 

机构地区：[1]山西医科大学口腔医院,山西省太原市030001 [2]韩国庆北国立大学齿科医院

出　　处：《中国组织工程研究》2017年第22期3525-3530,共6页Chinese Journal of Tissue Engineering Research

基　　金：国家自然科学基金(81400553);山西省国际科技合作项目(2015081030)~~

摘　　要：背景:电磁感应模拟矫治装置HITS及双槽沟舌侧托槽矫治系统是课题组的专利产品,关于"微种植体支抗-双槽沟舌侧托槽"矫治系统在关闭拔牙间隙阶段控制前牙转矩力系方面的研究非常重要。目的:通过HITS系统中关闭间隙阶段的Typodont实验,探讨舌侧矫治中良好控制前牙转矩的力系。方法:选取16副标准上颌安氏Ⅱ1拔除第一前磨牙的Typodont模型,分别在后牙区舌侧区和前牙区唇侧根尖区植入微种植体,通过改变舌侧微种植体位置(距离牙槽嵴顶4,8 mm)和牵引钩长度(4,8 mm)来调节回收力的方向,以及加载不同的舌向回收力(150,300 g)及唇侧压低力(50,100 g),以HITS模拟牙齿移动效果,并借助Micro CT扫描加力前后模型并进行Mimics 17.0三维重建,应用析因方差分析比较不同加力模式下前牙移动的特点。结果与结论:当牵引钩高度为4 mm、舌侧微种植体距牙槽嵴顶6 mm时,前牙切缘与根尖的位移差值较小;当牵引钩高度为8 mm、舌侧微种植体距牙槽嵴顶10 mm时,前牙切缘与根尖的位移差值较小。舌侧回收力为150 g时,前牙切缘与根尖的位移差值相对较小;唇侧压低力为100 g时,前牙切缘与根尖的位移差值相对较小。结果表明在舌侧矫治关闭拔牙间隙过程中,在加载回收力的同时配合唇侧压低力可较好地控制前牙转矩,且最优的力学模式为施加舌侧回收力150 g同时使用100 g唇侧压低力。BACKGROUND： Heat Induction Typodont System （HITS） and Double-Slot Lingual Bracket System are patented products of the research group. It is very important to explore a good control of anterior tooth torque on the micro-implant-double-slot lingual bracket system. OBJECTIVE： To provide the experimental basis for force system applied for controlling the anterior tooth torque in lingual orthodontics through Typodont experiment based on the HITS. METHODS： Sixteen Class II1 maxillary Typodont models without first premolar were made. Micro-implants were implanted in the lingual region of posterior teeth and labial region of anterior teeth. The direction of the retracting force was adjusted by changing the position of the lingual micro-implant （with a distance of 4, 8 mm from the alveolar crest） and the length of the hook （4, 8 mm）. And lingual retracting force （150, 300 g） and labial intruding force （50, 100 g） were loaded. The tooth movement by HITS was simulated and the models were scanned before and after force loading. Then the three-dimensional images were reconstructed by Mimics 17.0. Factorial variance analysis was adopted to compare the anterior movement changes under different loading modes. RESULTS AND CONCLUSION： When the length of the hook was 4 mm/8 mm and the lingual micro-implant was 6 mm/10 mm from the alveolar crest, the displacement difference between the incisal edge and the root of the anterior teeth was smaller than other groups. The optimal mechanics was 150 g for the lingual retracting force and 100 g for the labial intruding force. It could provide a satisfactory control to the anterior teeth torque when retracting force and labial intruding force were loaded at the same time during the space closing phase of lingual treatment. This study based on HITS provided a scientific basis for the clinical application of micro-implant-double-slot lingual bracket system in space closing phase.

关 键 词：生物材料 口腔生物材料 Typodont模型 微种植体 双槽沟舌侧托槽 电磁感应模拟矫治装置(HITS) 支抗 力学实验 转矩 国家自然科学基金 

分 类 号：R318[医药卫生—生物医学工程]