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Biomechanical investigation of orthodontic treatment planning based on orthodontic force measurement and finite

Jianlei Wu^1,1, Yunfeng Liu^1,1, Jianxing Zhang²

¹Key Laboratory of E&M (Zhejiang University of Technology), Ministry of Education and Zhejiang Province, Hangzhou, Zhejiang, China.

Technology and Health Care : Official Journal of the European Society for Engineering and Medicine

|May 16, 2018

Abstract

Background:

Orthodontic treatment planning (OTP) is primarily depended on clinical experiences of orthodontists at present, while equivocal OTP would increase the possibility of treatment failure.

Objective:

The objective was to investigate a methodology for quantitatively evaluating OTP, using theoretical analyses, orthodontic forces measurement (OFM) and finite element method (FEM).

Methods:

An OTP was theoretically designed based on a clinical case and forces on incisors in OTP were measured on a specialized platform. Further, FEM simulations were performed on the designed OTP and control group. At last, an 18-month tracking was carried out to observe treatment effects of the designed OTP.

Results:

The moving tendencies of incisors were in keeping with ideal treatment from the designed OTP through FEM; the maximal hydrostatic stress and logarithmic strain in periodontal ligament (PDL) decreased by 26.81% and 32.60% compared to the control group. Clinical feedback indicated that a controllable correction of incisors was realized after 18 months, which was in accord with the FEM result and root/bone resorption by reason of stress/strain reduction on PDL did not occur.

Conclusions:

Biomechanical responses of periodontium can be quantitatively estimated using OTM and FEM. This study provided an alternative technological mean for the predictability and optimization of clinical OTP.

Keywords:

Biomechanics finite element method (FEM)orthodontic forces measurement (OFM)orthodontic treatment planning (OTP)

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