Rotation trend of maxillary complex with mini-implant assisted protraction in different maxillary positions
10.3871/j.1004-7220.2015.01.038
- VernacularTitle:不同部位植入微种植钉进行前方牵引时上颌骨旋转趋势
- Author:
Chen LUO
1
;
Xiao-zhong QIN
2
;
Zhao-bin ZENG
3
;
Xue FENG
3
Author Information
1. Department Of Stomatology, Changzhi People’s Hospital；State Key Laboratory of Military Stomatology, Department of Orthodontics, School of Stomatology, the Fourth Military Medical University
2. Department Of Stomatology, Changzhi People’s Hospital
3. State Key Laboratory of Military Stomatology, Department of Orthodontics, School of Stomatology, the Fourth Military Medical University
- Publication Type:Journal Article
- Keywords:
Maxillary protraction;
Finite element analysis;
Mini-implant;
Rotation;
Maxilla
- From:
Journal of Medical Biomechanics
2015;30(1):E038-E042
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the differences in rotation trends of maxillary complex through planting mini-implants in different maxillary positions for the protraction of craniofacial suture, so as to provide reference and basis for the appropriate implantation location in clinical orthodontics. Methods The 3D finite element model of the maxillary complex with mini-implant assisted maxillary protraction was established, and the mini-implants were planted in maxillary infrazygomatic crest and the anterior region (6 mm above the root of bilateral incisors and canine), respectively. Traction force of 500 g was applied to analyze the differences in rotation trend of the maxillary complex at different maxillary positions and in different directions. Results When protracted in maxillary infrazygomatic crest region, the maxilla mainly showed counterclockwise rotation trend. When protracted in anterior region, the maxilla mainly showed clockwise rotation trend. Conclusions Protraction at infrazygomatic crest is more suitable for treating patients with hypodivergent crossbite, while protraction in maxillary anterior region is more suitable for treating patients with hyperdivergent crossbite.
