Analysis of Structural Abnormality of Temporomandibular Joint in 175 Cases before Orthodontic

Li ZHANG; Wan-yuan YUE; Shuang YANG; Shan-yong ZHANG

doi:10.12259/j.issn.2095-610X.S20210411

Volume 42 Issue 4

Apr. 2021

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Article Navigation > Journal of Kunming Medical University > 2021 > 42(4): 57-60

Li ZHANG, Wan-yuan YUE, Shuang YANG, Shan-yong ZHANG. Analysis of Structural Abnormality of Temporomandibular Joint in 175 Cases before Orthodontic[J]. Journal of Kunming Medical University, 2021, 42(4): 57-60. doi: 10.12259/j.issn.2095-610X.S20210411

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Li ZHANG, Wan-yuan YUE, Shuang YANG, Shan-yong ZHANG. Analysis of Structural Abnormality of Temporomandibular Joint in 175 Cases before Orthodontic[J]. Journal of Kunming Medical University, 2021, 42(4): 57-60. doi: 10.12259/j.issn.2095-610X.S20210411

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Analysis of Structural Abnormality of Temporomandibular Joint in 175 Cases before Orthodontic

doi: 10.12259/j.issn.2095-610X.S20210411

1.
Dept. of Oral Surgery
2.
Orthodontics，The 2nd People’s Hospital of Yunnan Province，Kunming Yunnan 650021
3.
Dept. of Oral and Maxillofacial Surgery，College of Stomatology，The 9th People’s Hospital，School of Medicine，Shanghai Jiao Tong University Shanghai ，Shanghai 200011，China

Received Date: 2020-12-27
Publish Date: 2021-04-01

Abstract

Abstract

Objective To investigate the abnormal structure of temporomandibular joint （TMJ） in patients before orthodontic treatment, and to provide guidance for clinical treatment. Methods A total of 175 patients aged 10-40 years before orthodontic treatment in our hospital from October 2015 to October 2019 were enrolled as study subjects. Based on age, the 175 patients were divided into three groups.Anteroposterior radiographs of the head and skull, oral panoramic radiographs, and bilateral temporomandibular joint open and closed position MRI were routinely taken; age, gender, classification of malocclusion and the incidence of temporomandibular joint structural abnormality were analyzed. Result Among the 175 patients, 114 cases had TMJ structural abnormality, and the abnormality rate was 65.14%. among 84 patients aged from 10 to 20 years, 71 were abnormal, the abnormal rate was 84.52%; among 68 patients aged from 21 to 30 years, 32 cases were abnormal, the abnormal rate was 47.06%.; among the 23 patients aged from 31 to 40 years, 11 were abnormal, with an abnormal rate of 47.83%. The abnormal rate of joint structure in 10-20-year group was higher than that in the other two groups, the difference was statistically significant （P < 0.05）. Analysing based on malocclusion deformity type, the abnormal rate of Angle II is 92.68%, Angle I is 37.25% and Angle III is 40.48%. The abnormal rate of Angle II is significantly higher than that of Angle I class and III class, the difference is statistically significant （P < 0.05）. The abnormal rate was 90.27% in female and 19.35% in male. The gender difference was statistically significant （P < 0.05）. Conclusion Temporomandibular joint disorder are very common among the patients seeking orthodontic treatment, and the clinical manifestations of such patients are often mild and tend to be ignored. Especially those 10-20-year-old Angle Ⅱ class deformity of female patients should raise more attention of orthodontic doctors.
- Temporomandibular joint structural anomaly,
- Orthodontics,
- Malocclusion deformity,
- Magnetic resonance imaging （MRI）

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References(16)

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