title: CT scan evaluation of glenoid bone and pectoralis major tendon: interest in shoulder prosthesis.
abstract: BACKGROUND
  The shoulder arthroplasty brings satisfaction to patients in terms of quality of life and indolence. However whether anatomic implant or reverse, it does not escape from the loosening of the glenoid component. Moreover, optimal implantation is required to ensure the functional outcome without shortening of the arm. The purpose of this study is obtain CT scan evaluation of the glenoid bone stock in order to optimize glenoid component implantation and obtain a reference to determine optimal humeral component placement in case of humeral proximal fracture.
  
  
  METHODS
  Between 2010 and 2011 we have analyzed 200 intact shoulder's CT. We measured maximal and minimal width in the transverse plane of the glenoid, the distance from the pectoralis major (PM) tendon to the humeral head, the greater tubercle, change of curvature and the anatomical neck.
  
  
  RESULTS
  Mean maximum width was 27.4 ± 3.4 mm and mean minimum width was 15.5 ± 2.8 mm. Distances between upper edge of PM tendon to: humeral head, greater tubercle, change of curvature and anatomical neck were respectively: 67.6 ± 9.98 mm, 57.8 ± 10.3 mm, 28.7 ± 9 mm, and 34.2 ± 9.7 mm.
  
  
  CONCLUSIONS
  Our study has produced an assessment of glenoid bone stock for optimal positioning of the glenoid implant but also to obtain a reference to determine the ideal location of the humeral component in the case of proximal humerus fracture.
authors.affiliation: Orthopaedic and Traumatology Surgery Service, University Hospital of Besançon, 25000 Besançon, France - Intervention, Innovation, Imagery, Engineering in Health (EA 4268), Medical and Pharmacology Section, IFR 133, University of Franche-Comté, 25000 Besançon, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Obert
authors.affiliation: Intervention, Innovation, Imagery, Engineering in Health (EA 4268), Medical and Pharmacology Section, IFR 133, University of Franche-Comté, 25000 Besançon, France - Radiology unit, Research Unit: EA 4268 I4S - IFR 133 INSERM University Hospital of Besançon, 25000 Besançon, France.
authors.forename: Christelle
authors.initials: C
authors.lastname: Peyron
authors.affiliation: Orthopaedic and Traumatology Surgery Service, University Hospital of Besançon, 25000 Besançon, France.
authors.forename: Etienne
authors.initials: E
authors.lastname: Boyer
authors.affiliation: Orthopaedic and Traumatology Surgery Service, University Hospital of Besançon, 25000 Besançon, France.
authors.forename: Gauthier
authors.initials: G
authors.lastname: Menu
authors.affiliation: Orthopaedic and Traumatology Surgery Service, University Hospital of Besançon, 25000 Besançon, France - Intervention, Innovation, Imagery, Engineering in Health (EA 4268), Medical and Pharmacology Section, IFR 133, University of Franche-Comté, 25000 Besançon, France.
authors.forename: François
authors.initials: F
authors.lastname: Loisel
authors.affiliation: Intervention, Innovation, Imagery, Engineering in Health (EA 4268), Medical and Pharmacology Section, IFR 133, University of Franche-Comté, 25000 Besançon, France - Radiology unit, Research Unit: EA 4268 I4S - IFR 133 INSERM University Hospital of Besançon, 25000 Besançon, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Aubry