title: Traumatic anterior glenohumeral instability: quantification of glenoid bone loss by spiral CT.
abstract: OBJECTIVE
  We evaluated the role of computed tomography (CT) for quantifying glenoid bone defects in patients with anterior glenohumeral instability and assisting in planning the most appropriate type of surgery.
  
  
  METHODS
  From January to November 2006, 93 patients were studied by spiral CT with multiplanar reconstructions (MPR) for recurrent posttraumatic anteroinferior instability, chronic multidirectional instability and recurrent glenohumeral dislocation after surgical stabilisation.
  
  
  RESULTS
  Quantitative CT enabled us to measure bone defects of the anteroinferior glenoid in terms of area (mm(2)) or surface percentage. Glenoid osseous defects were classified as small (<15%), medium (15%-20%), and large (>20%).
  
  
  CONCLUSIONS
  CT quantification of glenoid bone loss is very accurate as well as rapid, simple and easily reproducible. CT therefore provides an important contribution to preoperative selection of patients, assisting in directing those with <20% bone loss towards arthroscopic capsular repair.
authors.affiliation: Unità Operativa Complessa di Diagnostica per Immagini, Presidio Ospedaliero dei Pellegrini, ASL Napoli 1, Via Portamedina alla Pignasecca 41, 80134 Napoli, Italy.
authors.forename: G
authors.initials: G
authors.lastname: d'Elia
authors.forename: A
authors.initials: A
authors.lastname: Di Giacomo
authors.forename: P
authors.initials: P
authors.lastname: D'Alessandro
authors.forename: L C
authors.initials: LC
authors.lastname: Cirillo
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D001182:Arthroscopy; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures; D012008:Recurrence; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012540:Scapula / Q000000981:diagnostic imaging* / Q000473:pathology*; D012680:Sensitivity and Specificity; D012783:Shoulder Dislocation / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology / Q000601:surgery; D012785:Shoulder Joint / Q000000981:diagnostic imaging* / Q000473:pathology; D036542:Tomography, Spiral Computed; D016896:Treatment Outcome