Correlation analysis of temporomandibular joint changes after maxillary protraction in adolescent patients
10.12016/j.issn.2096-1456.2022.10.006
- Author:
LIU Yafei
1
;
WANG Yalin
2
;
DU Juan
3
;
ZUO Yanping
1
;
FENG Lifang
4
Author Information
1. Department of Orthodontics, the First Hospital of Hebei Medical University
2. Department of Stomatology, the Second Hospital of Baoding City
3. Department of Stomatology, Hebei Special Care Hospital
4. Department of Prosthodontics, College of Stomatology, North China University of Science and Technology
- Publication Type:Journal Article
- Keywords:
early permanent dentition;
adolescents;
skeletal class Ⅲ malocclusion;
temporomandibular joint;
dentofacial structure;
maxillary protraction;
correlation analysis
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2022;30(10):718-723
- CountryChina
- Language:Chinese
-
Abstract:
Objective :To study the effect of anterior traction on the temporomandibular joint in adolescent patients with skeletal Class Ⅲ malocclusion.
Methods:Twenty-nine patients with early permanent dentition with skeletal class Ⅲ malocclusions were measured by cephalometry and a coordinate system before and after maxillary protraction. The correlation between dentofacial structures and the temporomandibular joint was analyzed.
Results : After maxillary protraction, cephalometric measurements showed that the dentofacial structure changed significantly; ANB increased by 3.97° ± 2.32° (P<0.001); U1-SN increased by 4.97° ± 5.51° (P<0.001); L1-MP decreased by 1.26° ± 1.41° (P = 0.008); and MP-SN increased by 1.02° ± 3.90° (P = 0.003). The coordinate system measurement showed that the S-Fpx was decreased by 0.16 ± 1.52 mm (P = 0.041), the S-Ciy distance was significantly decreased by 0.09 ± 2.03 mm (P = 0.028), and there was no significant change in the temporomandibular joint spaces (A, P, and C) (P>0.05). Correlation analysis showed a moderate negative correlation between the posterior margin of the temporomandibular joint fossa and U1-SN (r = -0.427, P = 0.042). There was a moderate positive correlation between the leading edge of the condyle and ANB (r = 0.425, P = 0.043); there was no correlation between the joint space and dentofacial changes.
Conclusion:After treatment with maxillary protraction for adolescent skeletal class Ⅲ malocclusion, maxillary protraction had some effect on changes in the temporomandibular joint fossa and condyle and had no effect on the joint space.
- Full text:青少年前牵引后颞下颌关节改变的相关性分析.pdf
