title: Temporomandibular joint disc repositioning using bone anchors: an immediate post surgical evaluation by magnetic resonance imaging.
abstract: BACKGROUND
  Open joint procedures using bone anchors have shown clinical and radiograph good success, but post surgical disc position has not been documented with MRI imaging. We have designed a modified technique of using two bone anchors and 2 sutures to reposition the articular discs. This MRI study evaluates the post surgical success of this technique to reposition and stabilize the TMJ articular discs.
  
  
  METHODS
  Consecutive 81 patients with unilateral TMJ internal derangement (ID) (81 TMJs) were treated between December 1, 2003, and December 1, 2006, at the Department of Oral and Maxillofacial Surgery, Ninth Peoples Hospital, Shanghai, Jiao Tong University School of Medicine. All patients were subjected to magnetic resonance imaging before and one to seven days post surgery to determine disc position using the modified bone anchor technique.
  
  
  RESULTS
  Postoperative MRIs (one to seven days) confirm that 77 of 81 joints were identified as excellent results and one joint was considered good for an overall effective rate of 96.3% (78 of 81 joints). Only 3.7% (3 of 81) of the joints were designated as poor results requiring a second open surgery.
  
  
  CONCLUSIONS
  This procedure has provided successful repositioning of the articular discs in unilateral TMJ ID at one to seven days post surgery.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, No 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
authors.forename: Shanyong
authors.initials: S
authors.lastname: Zhang
authors.forename: Xiuming
authors.initials: X
authors.lastname: Liu
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Yang
authors.forename: Chi
authors.initials: C
authors.lastname: Yang
authors.forename: Minjie
authors.initials: M
authors.lastname: Chen
authors.forename: Majd S
authors.initials: MS
authors.lastname: Haddad
authors.forename: Zhuozhi
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000379:methods*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D053441:Suture Anchors; D019224:Temporomandibular Joint Disc / Q000473:pathology* / Q000601:surgery*; D013705:Temporomandibular Joint Disorders / Q000473:pathology* / Q000601:surgery*; D016896:Treatment Outcome