The Extra-Oral Measuring Technique of Initial Restoring Force Produced by Orthodontic Archwire Based on Dental Model
10.16156/j.1004-7220.2020.03.09
- VernacularTitle:基于牙颌模型的正畸弓丝初始回复力口外测量技术
- Author:
Jianlei WU
1
;
Yunfeng LIU
2
;
Jianxing ZHANG
3
;
Wei PENG
2
;
Chen CHEN
1
Author Information
1. Sino-German Institute of Intelligent Manufacturing, Ningbo Polytechnic
2. Key Laboratory of Special Purpose Equipment Zhejiang Province，Zhejiang University of Technology
3. Department of Stomotology, Zhejiang Provincial People’s Hospital
- Publication Type:Journal Article
- Keywords:
oral orthodontics;
dental model;
archwire recovery force;
extra-oral measurement
- From:
Journal of Medical Biomechanics
2020;35(3):E319-E324
- CountryChina
- Language:Chinese
-
Abstract:
Objective To realize the extra-oral measurement of initial recovery force produced by orthodontic wire using simulated dental model. Methods A clinical patient was selected as the study objective, and maxillary dental models, which were in accordance with the real dentition of patient, were fabricated by three-dimensional printing. An orthodontic force measuring system was constructed using Nano17 F/T mechanical sensors to measure the initial recovery forces on two maxillary central incisors, which were produced by a standard circle Ni-Ti wire with the diameter of 355.6 μm after the archwire was assembled on the dental model. Results Central incisor 21 suffered a lager initial orthodontic force compared with incisor 11, and the force systems on two incisors were both adverse to tooth ideal movement, therefore, an assistive device was necessary to improve force status of the teeth. When the orthodontic treatment plan was optimized, a satisfactory result was obtained after 18 months of treatment. Conclusions Force systems caused by orthodontic wire and exerted on the teeth could be accurately measured using the simulated dental model of patient, so as to predict the teeth moving type, and improve teeth treatment plan on this basis. The extra-oral measuring technique of orthodontic force provides an important reference for clinical orthodontic treatment, and creates a novel idea for the optimal design of orthodontic plan.
