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Updated: Jul 5, 2026

Knotless Independent Double-Row Repair and Biceps Augmentation for Anterosuperior Rotator Cuff Tears
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Simultaneous versus Staged Bilateral Shoulder Replacement: A Matched Cohort Study.

Gabriel Pina1, Juan David Lacouture2, Brendan Shi3

  • 1Orthopeadics and Traumatology Departement, ULS Médio Tejo, Hospital Doutor Manoel Constâncio, Largo Eng° Bioucas, 2200-202 Abrantes, Portugal.

Journal of Shoulder and Elbow Surgery
|July 3, 2026
PubMed
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Simultaneous bilateral shoulder arthroplasty is safe and effective for carefully selected patients, reducing hospital stay without compromising outcomes or increasing complications compared to staged procedures.

Area of Science:

  • Orthopedic Surgery
  • Arthroplasty
  • Biomedical Engineering

Background:

  • The safety and clinical value of simultaneous bilateral shoulder arthroplasty (SimBA) are not well-established.
  • This study compares SimBA to staged bilateral shoulder arthroplasty (StaBA) in a matched-cohort design.

Purpose of the Study:

  • To investigate the safety and clinical outcomes of SimBA versus StaBA.
  • To compare complication rates, reoperation rates, range of motion, and patient-reported outcomes.

Main Methods:

  • Retrospective matched-cohort study of patients undergoing SimBA or StaBA for various shoulder conditions.
  • Patients were matched by age, gender, ASA score, and arthroplasty type.
  • Data collected included demographics, complications, length of stay, range of motion, Constant score, and Subjective Shoulder Value (SSV).
Keywords:
Bilateral Shoulder ArthroplastyReverse Shoulder ArthroplastyShoulder ArthroplastySimultaneous Bilateral Shoulder ArthroplastyStaged Bilateral Shoulder ArthroplastyTotal Shoulder Arthroplasty

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Main Results:

  • No significant differences in complications, reoperations, or patient-reported outcomes (SSV) between SimBA and StaBA groups.
  • SimBA group had a significantly shorter total length of stay (3.4 vs 7.5 days).
  • All SimBA patients reported willingness to undergo the procedure again and recommend it.

Conclusions:

  • Simultaneous bilateral shoulder arthroplasty is a safe and effective option for carefully selected patients (age ≤80, ASA ≤2, good social support).
  • SimBA reduces total length of stay while achieving equivalent outcomes and complication rates compared to staged surgery.
  • Treatment decisions should be collaborative, involving the surgeon, anesthesiologist, and patient.