title: Surgical treatment of traumatic temporomandibular joint ankylosis with medially displaced residual condyle: surgical methods and long-term results.
abstract: OBJECTIVE
  We report a surgical method for the treatment of traumatic temporomandibular joint (TMJ) ankylosis with a medially displaced residual condyle and compare the long-term results with those obtained using different interpositional materials.
  
  
  METHODS
  From 2001 to 2009, 60 patients and 82 joints diagnosed with traumatic TMJ ankylosis with a medially displaced residual condyle were included in the present study. Lateral arthroplasty (LAP) was performed, and either the masseter muscle flap (MMF) or the temporalis myofascial flap (TMF) was used as interpositional material to fill the lateral space. The long-term results of these treatments were compared by performing postoperative computed tomography scans and clinical follow-up examinations.
  
  
  RESULTS
  Of the 82 joints, 22 were treated with LAP, 28 with LAP and MMF, and 32 with LAP and TMF. Of the 60 patients, 38 (48 joints) participated in long-term follow-up (from 1 to 4 yr). Of the 11 joints treated with LAP, 4 (36.4%) developed reankylosis. Of the 17 joints treated with LAP and MMF, 3 (17.6%) developed reankylosis, and none of the 20 joints treated with LAP and TMF developed reankylosis. Compared with LAP alone, LAP with TMF significantly improved the maximal incisal opening during long-term follow-up.
  
  
  CONCLUSIONS
  LAP can preserve the residual TMJ structure. The TMF is a reliable interpositional material in LAP for the prevention of reankylosis.
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, China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: He
authors.forename: Chi
authors.initials: C
authors.lastname: Yang
authors.forename: Minjie
authors.initials: M
authors.lastname: Chen
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Yang
authors.forename: Lingzhi
authors.initials: L
authors.lastname: Li
authors.forename: Qian
authors.initials: Q
authors.lastname: Jiang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000844:Ankylosis / Q000000981:diagnostic imaging / Q000601:surgery*; D001178:Arthroplasty / Q000379:methods*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000473:pathology; D008406:Masseter Muscle / Q000601:surgery; D008875:Middle Aged; D016059:Range of Motion, Articular; D019651:Plastic Surgery Procedures / Q000379:methods; D055502:Secondary Prevention; D018709:Statistics, Nonparametric; D013524:Surgical Flaps; D013703:Temporal Muscle / Q000601:surgery*; D013704:Temporomandibular Joint / Q000293:injuries*; D013705:Temporomandibular Joint Disorders / Q000000981:diagnostic imaging / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D055815:Young Adult