title: Measurements of three-dimensional glenoid erosion when planning the prosthetic replacement of osteoarthritic shoulders.
abstract: The three-dimensional (3D) correction of glenoid erosion is critical to the long-term success of total shoulder replacement (TSR). In order to characterise the 3D morphology of eroded glenoid surfaces, we looked for a set of morphological parameters useful for TSR planning. We defined a scapular coordinates system based on non-eroded bony landmarks. The maximum glenoid version was measured and specified in 3D by its orientation angle. Medialisation was considered relative to the spino-glenoid notch. We analysed regular CT scans of 19 normal (N) and 86 osteoarthritic (OA) scapulae. When the maximum version of OA shoulders was higher than 10°, the orientation was not only posterior, but extended in postero-superior (35%), postero-inferior (6%) and anterior sectors (4%). The medialisation of the glenoid was higher in OA than normal shoulders. The orientation angle of maximum version appeared as a critical parameter to specify the glenoid shape in 3D. It will be very useful in planning the best position for the glenoid in TSR.
authors.affiliation: École Polytechnique Fédéral de Lausanne, EPFL-LBO, Station 19, Lausanne, 1015, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Terrier
authors.forename: J
authors.initials: J
authors.lastname: Ston
authors.forename: X
authors.initials: X
authors.lastname: Larrea
authors.forename: A
authors.initials: A
authors.lastname: Farron
mesh_terms: D000328:Adult; D000368:Aged; D019643:Arthroplasty, Replacement / Q000379:methods*; D005260:Female; D061165:Glenoid Cavity / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D009949:Orientation; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D011300:Preoperative Care / Q000379:methods; D015203:Reproducibility of Results; D012540:Scapula / Q000000981:diagnostic imaging / Q000473:pathology; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed / Q000379:methods; D055815:Young Adult
keywords: 3D reconstruction; CT scan; Glenoid erosion; Glenoid morphology; Osteoarthritis; Total shoulder arthroplasty