Evaluation of rapid teeth movement through reducing resistance and distraction in Beagle dogs with cone-beam computed tomography
10.3969/j.issn.1673-4254.2013.09.05
- VernacularTitle:锥形束CT对Beagle犬减阻-牵张快速牙移动的评价
- Author:
Xi CHEN
1
;
Ning LI
;
Jianlin LIU
;
Zaoxia PENG
;
Yali HUANG
;
Ran XU
;
Huiting LIU
;
Lele YANG
Author Information
1. 西安交通大学医学院第一附属医院口腔科
- Keywords:
cone-beam computed tomography;
teeth rapid movement;
dental alveolar bone density
- From:
Journal of Southern Medical University
2013;(9):1280-1284
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of rapid teeth movement through reducing resistance and distraction using cone-beam computed tomography (CBCT). Methods The left or right side of the mandible of 10 beagles (5 males and 5 females) was randomly selected as the control side (for the conventional distraction with a force of about 85 g) and the other side as the experimental side (subjected to reducing resistance and distraction). CBCT images were taken at 5, 10, and 15 days and also after retaining for 10 and 90 days after distraction for 15 days. The distance of teeth transportation, degree of inclination, alveolar bone density of the compressive area and root resorption were evaluated based on the CBCT images and Ez3D2009 visualization software. Results No significant difference was found between CBCT-based measurement and direct measurement of teeth transportation distance within the mouths (P>0.05). Teeth inclination on the experimental side was slightly greater than that on the control side (P<0.05). The root resorption on the experimental side was minimal, and the bone density increased gradually along with the teeth migration. The experimental side showed a comparable newly formed alveolar bone density and similar X-ray features of the compressive area with the control side. Conclusions CBCT three-dimensional imaging can resolve the problems of overlapping and deformation of the two-dimensional images and is especially useful for measurement of teeth inclination and alveolar bone density in the process of reducing resistance and distraction.
