title: Results of radiological follow-up of untreated anterior disc displacement without reduction in adolescents.
abstract: Our aim was to assess the progression of disease without treatment in adolescents with non-reducible anterior disc displacement (ADD) using serial magnetic resonance images (MRI). We retrospectively reviewed all patients under the age of 20 years who had unilateral non-reducible ADD and had had two MRI during a period of 6 months with no intervention. A total of 124 patients (101 female and 23 male) with a mean (range) age of 16 (10-20) years had 2 MRI at least 6 months apart (mean (range) 14 (6-47) months). At the initial visit there was a significant difference between the involved and the non-involved sides in the incidence of condylar degeneration and effusion (p=0.0001). The effusion significantly decreased despite the lack of intervention, the amount of disc deformation significantly increased (p=0.003), and the degree of condylar degeneration increased from 61%-69%, but this did not differ significantly. We conclude that during the period of observation there was a significant reduction in the incidence of effusion and significant increase in disc deformation. Whilst there was an increase in the changes on the condylar surface, this was not significant.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology. Shanghai 200011, China.
authors.forename: Ziang
authors.initials: Z
authors.lastname: Zhuo
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology. Shanghai 200011, China. Electronic address: caixieyi27@126.com.
authors.forename: XieYi
authors.initials: X
authors.lastname: Cai
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D013122:Spinal Diseases; D013705:Temporomandibular Joint Disorders; D055815:Young Adult
keywords: Adolescent; Anterior disc displacement; Degeneration; MRI; Natural course; Temporomandibular joint