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Evolution of Reverse Shoulder Arthroplasty Design Rationales and Where We Are Now.

Anup A Shah1, Mihir Sheth, Michael McKee

  • 1From the Banner University Medical Group, University of Arizona - College of Medicine, Phoenix, AZ (Shah, McKee and Lederman); University of Washington, Seattle, WA (Sheth).

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|August 21, 2024
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Summary

Reverse shoulder arthroplasty (RSA) is now the most common shoulder surgery in the US. This review examines current implant designs and their impact on patient outcomes and complications.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Reconstructive Surgery

Background:

  • Reverse shoulder arthroplasty (RSA) is nearing its 20th anniversary in the US and is now the most frequently performed shoulder arthroplasty.
  • Debate continues regarding Grammont-style versus lateralized implant designs, with comparable outcomes reported for both.
  • Early research focused on fixation and indications; recent studies examine component design and positioning's effect on function and complications.

Purpose of the Study:

  • To provide a synopsis of design rationales for current RSA prostheses.
  • To review outcomes associated with RSA design and component positioning.

Main Methods:

  • Literature review of current reverse shoulder arthroplasty designs.
  • Analysis of studies evaluating functional outcomes and complications related to implant design and position.

Main Results:

  • Comparable outcomes have been reported for both Grammont-style and lateralized RSA designs.
  • Component design and position significantly influence functional outcomes and complication rates.

Conclusions:

  • Understanding RSA design rationales is crucial for optimizing patient outcomes.
  • Further research into the impact of component design and positioning is warranted to refine surgical techniques and improve patient results.