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Related Experiment Video

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Reverse Total Shoulder Arthroplasty
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Optimizing glenoid bone preservation in reverse total shoulder arthroplasty using augmented baseplates.

Jordan A Bauer1, Joshua J Slowinski1, Lin Feng1

  • 1Department of Orthopedic Surgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, SUNY, Buffalo, NY, USA.

JSES Reviews, Reports, and Techniques
|August 17, 2023
PubMed
Summary
This summary is machine-generated.

Augmented baseplates in reverse total shoulder arthroplasty (rTSA) effectively preserve glenoid bone stock. This bone-preserving technique significantly improves range of motion and patient outcomes with minimal complications.

Keywords:
Aaugmented baseplateGlenoid preservationOff-axis reamingReverse shoulder arthroplasty angleReverse total shoulder arthroplastyScapular notching

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Evolving reverse total shoulder arthroplasty (rTSA) techniques emphasize glenoid bone preservation and biomechanics.
  • Augmented baseplates lateralize the glenosphere's center of rotation, preserving bone and enhancing range of motion.
  • This approach aims to reduce postoperative complications in rTSA.

Purpose of the Study:

  • To evaluate the efficacy of augmented baseplates for glenoid bone preservation in rTSA.
  • To assess the technique's impact on range of motion, strength, and patient-reported outcomes.
  • To analyze radiographic outcomes, including component loosening and scapular notching.

Main Methods:

  • Retrospective review of 37 patients undergoing primary rTSA with augmented baseplates for Walch type A1/Sirveaux E0 glenoids.
  • Data collected included range of motion, strength, and patient-reported outcomes (VAS, SEAS, ASES, DASH).
  • Radiographic analysis assessed glenoid bone loss, component loosening, and scapular notching; preoperative and postoperative data were compared using t-tests.

Main Results:

  • Significant improvements observed in active forward flexion and abduction at an average follow-up of 23.3 months.
  • No radiographic evidence of glenoid notching or component loosening was found.
  • Patient-reported outcome scores showed significant improvements in pain and function after approximately 25 months.

Conclusions:

  • rTSA utilizing augmented baseplates is effective for preserving glenoid bone stock in patients with minimal bone loss.
  • The technique leads to significant improvements in range of motion and patient-reported outcomes.
  • This bone-preserving strategy demonstrates a low complication rate and positive long-term results.