Development of mechanics of efficient tooth movement for reduction of orthodontic treatment period

开发有效的牙齿移动机制以缩短正畸治疗时间

基本信息

批准号：
14370699
负责人：
YOSHIDA Noriaki
金额：
$ 8.77万
依托单位：
Nagasaki University Graguate School of Biomedical Sciences
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14370699/
关键词：
Initial tooth displacement Orthodontic tooth movement Magnetic sensor Measurement of dental cast profile Displacement measurement Mechanics for efficient tooth movement Sliding mechanics Implant orthodontics 光学式3次元形状計測装置歯の移動予測初期変位

项目摘要

Control of anterior teeth movement is essential to the success of an orthodontic treatment. In Sliding Mechanics, horizontal level of retraction force can be freely adjusted by soldering various lengths of power arms to an arch wire. Therefore, the force system for desired type of tooth movement can be simply applied. The purpose of this study was to determine what level of retraction force, namely, what length of power arm allow the anterior teeth to retract to a desired position. Human subject with upper right central incisor was chosen as target tooth. Initial tooth movement under sliding mechanics with various horizontal retraction forces were measured by Two-point Three-Dimensional Displacement Magnetic Sensor Device. The sensors detected and recorded initial displacement of target tooth in real time. The tooth's motion trajectories projected on the sagital plane was studied. It was suggested that the location of center of rotation of the target tooth varies according to the height level of retraction force application. Therefore, anterior tooth can be tipped crown-lingually or root-lingually in a pre-determined course by manipulating the location of center of rotation or rather the height level of retraction force application, i.e. the length of power arms itself. This would be of great help to orthodontists for establishing efficient treatment planning for patients.

控制前牙移动对于正畸治疗的成功至关重要。在滑动力学中，通过将不同长度的动力臂焊接到弓丝上，可以自由调节回缩力的水平水平。因此，可以简单地应用用于所需类型的牙齿移动的力系统。本研究的目的是确定多大程度的回缩力，即多长的动力臂可以让前牙回缩到所需位置。选择具有右上中切牙的人类受试者作为目标牙齿。利用两点三维位移磁传感器装置测量了具有不同水平回缩力的滑动力学下牙齿的初始移动。传感器实时检测并记录目标牙齿的初始位移。研究了投影在矢状面上的牙齿运动轨迹。有人建议，目标牙齿的旋转中心的位置根据收缩力施加的高度水平而变化。因此，通过操纵旋转中心的位置，或者更确切地说，通过操纵回缩力施加的高度，即动力臂本身的长度，可以按照预定的路线向冠舌侧或根舌侧倾斜前牙。这对于正畸医生为患者制定有效的治疗计划有很大帮助。