Preliminary MRI evaluation of anterior repositioning splint in treatment of disc displacement with reduction of temporomandibular joint.
10.3760/cma.j.cn112144-20220430-00232
- Author:
Xin Rui WANG
1
;
Yong Ming QIAO
2
;
Yiqiang QIAO
1
Author Information
1. Department of Orthodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
2. Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
- Publication Type:Journal Article
- MeSH:
Adolescent;
Adult;
Arthralgia;
Female;
Humans;
Joint Dislocations/therapy*;
Magnetic Resonance Imaging;
Male;
Splints;
Temporomandibular Joint;
Temporomandibular Joint Disc/diagnostic imaging*;
Young Adult
- From:
Chinese Journal of Stomatology
2022;57(9):914-920
- CountryChina
- Language:Chinese
-
Abstract:
Objective: MRI images were used to study the efficacy of anterior repositioning splint (ARS) in the treatment of different types of disc displacement with reduction (DDWR) in temporomandibular joint. Methods: From September 2020 to December 2021, 26 patients with DDWR were enrolled in the Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital of Zhengzhou University. There were 5 males and 21 females with an average age of (20.8±5.8) years. ARS was used for 3-6 months. The changes of joint clicking, opening type and joint pain before and after treatment were compared. The changes of disc position, disc-condyle angle and condylar bone mass before and after treatment were compared by MRI. Paired t-test was performed on the disc-condyle angle before and after treatment, Fisher's exact test was performed on the change of disk position, and other count data were expressed as rate (%). Results: After ARS treatment, the effective rates of joint clicking,abnormal opening, joint pain and disc displacement were 97%(35/36), 14/18, 7/9 and 95%(36/38). MRI analysis found that there was a significant difference between the disc position before and after treatment (P<0.001), MRI analysis showed that the anterior disc displacement (48%, 25/52) and the anterolateral disc displacement (17%, 9/52) were the most common before treatment. In contrast, the normal superior disc (75%, 39/52) and the anterior disc displacement (17%, 9/52) were the most common after treatment, no significant changes were seen after treatment in the anteromedial disc displacement. The disc-condylar angle was (36.09±19.02) ° before ARS treatment and (3.94±10.12) ° after ARS treatment(t=9.23, P<0.001). After treatment, 46% (12/16) of the patients showed new bone formation, and the height of the condyle recovered. Conclusions: The clinical efficacy of ARS in the treatment of anterior disc displacement and anterolateral displacement of temporomandibular joint is remarkable, which can restore the disc-condylar relationship of most patients with indications.
