title: Acute trauma induced disc displacement without reduction and its sequelae.
abstract: Acute traumatic temporomandibular joint disc displacement (ATDD) and its sequelae are not familiar for most surgeons. This study is to discuss its sequelae in cases without disc reduction after failed conservative treatment. From 2010 to 2015, 26 patients with 34 joints were included in the study. All patients had at least 3 months conservative treatment. Their maximal incisor opening (MIO) was measured during follow-ups and MRI examination was used to check the condylar bone degeneration. The mean follow-up for conservative treatment after admission was 8.69 months, the patients reached an average of 25.7 mm MIO. MRI showed condylar bone intact in 8 joints (23.5%), condylar surface bone destruction (Wilks IV, V stages) in 14 joints (41.2%), and severe bone resorption in 12 joints (35.3%). 15 patients with 23 joints were asked for surgical treatment after a mean conservative treatment of 5.4 months (3-12 months) to improve mouth opening and relieve chronic pain. 12 joints had total joint replacement (TJR). 11 joints had disc repositioning. Their mean MIO before operation was 19.8 mm and significantly improved to 33.9 mm after operation (p = 0.0000). ATDD may cause severe osteoarthritis or ankylosis. Disc repositioning and TJR could significantly improve MIO.
authors: Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Key Laboratory of Stomatology, Shanghai, 200011, China.
authors: DongMei
authors: D
authors: He
authors: Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Key Laboratory of Stomatology, Shanghai, 200011, China.
authors: XiuJuan
authors: X
authors: Yang
authors: Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Key Laboratory of Stomatology, Shanghai, 200011, China.
authors: FeiYu
authors: F
authors: Wang
authors: Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Key Laboratory of Stomatology, Shanghai, 200011, China.
authors: Chi
authors: C
authors: Yang
authors: Department of Radiology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
authors: MinJun
authors: M
authors: Dong
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D001842:Bone and Bones / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013704:Temporomandibular Joint / Q000473:pathology* / Q000601:surgery; D013705:Temporomandibular Joint Disorders / Q000209:etiology* / Q000601:surgery / Q000628:therapy; D014947:Wounds and Injuries / Q000150:complications*; D055815:Young Adult