HYPOTHESIS: Scapular cortical thickness has not been fully characterized from the
perspective of determining optimal screw placement for securing the glenoid base plate in
reverse shoulder arthroplasty. MATERIALS AND METHODS: Twelve fresh frozen cadaveric
scapulae underwent high resolution CT scans with 3-dimensional reconstructions and wall
thickness analysis. Digital base plates were positioned and virtual screws were placed
according to 2 scenarios: A-intraosseous through the entire course and exits a “safe region” …

Backgrounds The rigid fixation of glenoid base plate is essential for the prevention of
dissociation of the construct in the reverse total shoulder arthroplasty. For the rigid fixation,
ideal placement of fixation screw is crucial but it is difficult to determine the best direction
and length of screws. The purpose of this study was to determine configuration of optimal
screw in cadaveric scapulae and compare with that in patient who underwent reverse total
shoulder arthroplasty. Materials and methods Seven scapulae were used and implanted …