Charles M. Jobin, MD, Director
Jay D. Keener, MD; Peter Nissen Chalmers, MD; Ken Yamaguchi, MD, MBA
Humeral hemiarthroplasty, anatomic total shoulder arthroplasty, and reverse total shoulder arthroplasty all rely upon a prosthetic articular resurfacing fixated to the proximal humerus. Humeral components have changed considerably since the initial designs with advanced understanding of proximal humeral anatomy and prosthetic biomechanics. Fixed, monoblock components have been replaced with modular components with variability in inclination, offset, version, and stem length. Press-fit designs now commonly use in-growth surfaces. Metaphyseal fixation is now often favored over diaphyseal fixation. While both cemented and noncemented fixation continue to be used commonly, each of these fixation techniques has advantages and disadvantages. Although aseptic loosening requiring revision is rare, osteolysis, stress shielding, radiographic lucent lines, and proximal humeral bone loss can occur.
Humeral periprosthetic fractures continue to be a disabling and difficult to treat consequence. Innovations such as short-stem, stemless, and platform stems are all currently under clinical investigation.
To create an opportunity for JAAOS readers to meet the authors of “The Humeral Component in Shoulder Arthroplasty” published in the June 2017 issue of the Journal.