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April 3, 2026Journal of Orthopaedic Research®

Effect of Bone Density and Lesser Tuberosity Osteotomy on Stemmed and Stemless Shoulder Arthroplasty Stability: A Biomechanical Study

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Authors

DGDylan N. GreifPCPatrick CastleARAndrew Rodenhouse

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Overview

Biomechanical study evaluates shoulder arthroplasty stability concerning bone density and osteotomy, indicating safety of LTO.

Key Points

  • This study aims to determine if lesser tuberosity osteotomy affects stability in stemless shoulder arthroplasty among patients with low bone density.
  • Assessed humeral samples using a biomechanical testing device
  • Used dual-energy x-ray absorptiometry to determine bone mineral density
  • Randomized samples into three implant cohorts for analysis of micromotion and stability
  • Increased micromotion observed at 820 N axial load for stemless implants (p < 0.001)
  • Reduced torsional stability found in stemless versus stemmed implants (p < 0.001)
  • Lesser tuberosity osteotomy did not increase micromotion for any implant type
  • Decreased bone mineral density correlated with increased instability across all implants (p < 0.001)

Cite This Study

Greif et al. (2026) studied this question.

synapsesocial.com/papers/69cf5ebd5a333a821460d4c7https://doi.org/10.1002/jor.70189
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