title: Posterior Radioscaphoid Angle as a Predictor of Wrist Degenerative Joint Disease in Patients With Scapholunate Ligament Tears.
abstract: OBJECTIVE
  The purpose of this study is to determine whether the posterior radioscaphoid angle, a marker of posterior displacement of the scaphoid, is associated with degenerative joint disease in patients with scapholunate ligament tears.
  
  
  METHODS
  Images from 150 patients with wrist pain who underwent CT arthrography and radiography were retrospectively evaluated. Patients with and without scapholunate ligament ruptures were divided into two groups according to CT arthrography findings. The presence of degenerative changes (scapholunate advanced collapse [SLAC] wrist) was evaluated and graded on conventional radiographs. Images were evaluated by two readers independently, and an adjudicator analyzed the discordant cases. Posterior radioscaphoid angle values were correlated with CT arthrography and radiographic findings. The association between posterior radioscaphoid angle and degenerative joint disease was evaluated. Scapholunate and radiolunate angles were considered in the analysis.
  
  
  RESULTS
  The posterior radioscaphoid angle was measurable in all patients, with substantial interobserver agreement (intraclass correlation coefficient, 0.75). The posterior radioscaphoid angle performed better than did the scapholunate and radiolunate angles in the differentiation of patients with and without SLAC wrist (p < 0.02). Posterior radioscaphoid angles greater than 114° presented an 80.0% sensitivity and 89.7% specificity for the detection of SLAC wrist.
  
  
  CONCLUSIONS
  Posterior radioscaphoid angles were strongly associated with degenerative wrist disease, with potential prognostic implications in patients with wrist trauma and scapholunate ligament ruptures.
authors.affiliation: 1 Department of Radiology, Service d'Imagerie Guilloz, CHU Nancy, 29 Ave du Maréchal de Lattre de Tassigny, Nancy 54035 Cedex, France.
authors.forename: Pedro Augusto
authors.initials: PA
authors.lastname: Gondim Teixeira
authors.affiliation: 1 Department of Radiology, Service d'Imagerie Guilloz, CHU Nancy, 29 Ave du Maréchal de Lattre de Tassigny, Nancy 54035 Cedex, France.
authors.forename: Jacques
authors.initials: J
authors.lastname: De Verbizier
authors.affiliation: 1 Department of Radiology, Service d'Imagerie Guilloz, CHU Nancy, 29 Ave du Maréchal de Lattre de Tassigny, Nancy 54035 Cedex, France.
authors.forename: Sabine
authors.initials: S
authors.lastname: Aptel
authors.affiliation: 1 Department of Radiology, Service d'Imagerie Guilloz, CHU Nancy, 29 Ave du Maréchal de Lattre de Tassigny, Nancy 54035 Cedex, France.|2 Université de Lorraine, Laboratoire IADI INSERM-U947, CHU de Nancy Brabois, Vandoeuvre-lès-Nancy, France.
authors.forename: Maxime
authors.initials: M
authors.lastname: Wack
authors.affiliation: 3 Centre Chirurgical Emile Gallé, Nancy, France.
authors.forename: François
authors.initials: F
authors.lastname: Dap
authors.affiliation: 3 Centre Chirurgical Emile Gallé, Nancy, France.
authors.forename: Gilles
authors.initials: G
authors.lastname: Dautel
authors.affiliation: 1 Department of Radiology, Service d'Imagerie Guilloz, CHU Nancy, 29 Ave du Maréchal de Lattre de Tassigny, Nancy 54035 Cedex, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Blum
mesh_terms: D000293:Adolescent; D000368:Aged; D001175:Arthrography / Q000379:methods*; D003287:Contrast Media; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging*; D008023:Ligaments, Articular / Q000000981:diagnostic imaging* / Q000293:injuries*; D012667:Lunate Bone / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000000981:diagnostic imaging*; D011237:Predictive Value of Tests; D011379:Prognosis; D011857:Radiographic Image Interpretation, Computer-Assisted; D011884:Radius / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D012421:Rupture; D021361:Scaphoid Bone / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014954:Wrist Injuries / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media
keywords: MDCT; degenerative joint disease; scaphoid instability; scapholunate ligament tears; wrist instability