@article{LIU2022, 
author = {Yafei LIU and Yalin WANG and Juan DU and Yanping ZUO and Lifang FENG},
title = {Correlation analysis of temporomandibular joint changes after maxillary protraction in adolescent patients},
year = {2022},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {30},
number = {10},
pages = {718-723},
keywords = {early permanent dentition, adolescents, skeletal class Ⅲ malocclusion, temporomandibular joint, dentofacial structure, maxillary protraction, correlation analysis},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2022.10.006},
doi = {10.12016/j.issn.2096-1456.2022.10.006},
abstract = {ObjectiveTo study the effect of anterior traction on the temporomandibular joint in adolescent patients with skeletal Class Ⅲ malocclusion.MethodsTwenty-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.ResultsAfter 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.ConclusionAfter 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.}
}