Dynamic Implantation Process of Orthodontic Micro-Implant:A Finite Element Numerical Simulation
10.16156/j.1004-7220.2024.03.024
- VernacularTitle:正畸微植体动态植入过程有限元数值仿真
- Author:
Xuelin MIAO
1
;
Hongwei ZHANG
;
Lingling QIU
;
Kangkang JI
;
Jiaqi ZHANG
Author Information
1. 北京石油化工学院机械工程学院,北京 102617
- Keywords:
orthodontic micro-implant;
cortical bone;
cancellous bone;
stress;
three-dimensional(3D)model
- From:
Journal of Medical Biomechanics
2024;39(3):539-544
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the stress distributions of the surrounding bone during the dynamic implantation of micro-implants,a finite element model of self-attacking orthodontic micro-implant dynamic implantation was proposed and established.Methods A three-dimensional(3D)oral model was constructed using CBCT data.The local model around the implant and the 3D finite element model of the micro-implant were established using ABAQUS software.The micro-implant was implanted into the jaw with an axial propulsion force of 40 N at a constant speed of 0.5 r/s.Results The 3D finite element model was successfully established to simulate dynamic self-attacking orthodontic micro-implant implantation in the jaw bone.The results showed that implantation stage and thread position had significant effects on bone stress distribution and the stress states of different bones had obvious differences:the maximum stress on the cortical bone was 167 MPa,and the maximum stress at the stable stage was approximately 50 MPa.The maximum stress on cancellous bone was 30 MPa.Conclusions The implantation stage and thread position have apparent influences on stress distribution.The stress difference between the cortical and cancellous bones was evident.The stress characteristics can judge the bone type,and whether the jaw is in a suitable implantation state can be judged by the bone stress distributions around the implant.
