生理性支抗控制矫治器技术结合压低辅弓打开咬合的三维有限元建模及数值分析

发布时间：2018-03-18 05:05

本文选题：牙　切入点：正畸学　出处：《中国组织工程研究》2017年30期 　论文类型：期刊论文

【摘要】：背景:生理性支抗控制矫治器是近几年来应用于正畸临床治疗的一种新型矫治器。其在支抗控制、力矩主导及摩擦力控制等方面均有其优越性。生理性支抗控制矫治器矫治技术在打开咬合方面也有其独特性。目的:通过建立包含压低辅弓的PASS矫治器三维有限元模型,分析压低辅弓在PASS矫治技术中对前牙的压低作用以及对磨牙增强支抗的作用。方法:将CT扫描数据输入Mimicsl7.0软件获得牙齿及颌骨的三维模型。利用Geomagic Studio、NX、ANSYSl5.0等一系列建模软件获得包含压低辅弓和生理性支抗控制矫治器的上颌牙列三维有限元模型。分析主辅弓结扎位点分别置于中切牙近中、侧切牙近中、侧切牙远中时牙列的整体受力情况及前牙的运动趋势。结果与结论:①结扎位点在中切牙间时,前牙压低效果明显;侧切牙近中结扎时前牙唇倾效果明显;侧切牙远中结扎时,前牙出现舌倾伴压低的趋势。3种工况下磨牙后倾的位移趋势均较大;②结果表明,结扎在中切牙近中时,切牙运动趋势最大,主要作用是压低切牙,3种工况对磨牙均产生较大后倾力。实验模拟了临床牙齿受力情况和位移趋势,有利于临床对该项技术的理解和应用。
[Abstract]:Background: physiological Anchorage controlled appliance is a new type of orthodontic appliance used in clinical orthodontic treatment in recent years. Torque leading and friction control have their advantages. Physiological Anchorage control appliance has its own uniqueness in opening occlusal. Objective: to establish a three-dimensional finite element model of PASS orthodontic appliance, which contains an auxiliary bow with low pressure. This paper analyzes the effect of auxiliary arch of depression on anterior teeth in PASS correction and its effect on strengthening Anchorage of molars. Methods: three dimensional models of teeth and jaws were obtained with CT scanning data input into Mimicsl7.0 software. A series of models were constructed by Geomagic Studio NXANSYSl5.0 and so on. The 3D finite element model of maxillary dentition was obtained by using the software. The ligation sites of the main and auxiliary arch were placed in the central incisor, respectively. Results and conclusion the effect of anterior teeth depression was obvious when the ratio 1 ligation site was between the central incisors and the distal incisors, and the effect of labial inclination was obvious when the lateral incisors were proximally ligated, and the anterior incisor movement was obvious when the lateral incisor was distal to the central incisor, and the movement of the anterior incisors was more obvious than that of the lateral incisors. When the lateral incisor was distal ligation, the tendency of lingual inclination with depression in the anterior teeth was higher than that in the distal incisor. 3. The results showed that the movement of incisor was the largest when ligated in the proximal incisor. The main function is to lower the incisor to three working conditions to the molars have a greater force, the experimental simulation of clinical tooth force and displacement trend, which is conducive to clinical understanding and application of the technology.
【作者单位】：新疆医科大学第二附属医院正畸科;
【分类号】：R783.5

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