OSS™ Side Access Expandable Device

The Orthopedic Salvage System Side Access Expandable Device offers treatment options for patients requiring distal femoral replacement who have not yet achieved skeletal maturity (open epiphysis) or patients who require surgery who have significant residual leg length discrepancy.

Based on the proven Orthopedic Salvage System rotating hinged knee1-2, the OSS Side Access Expandable Device is compatible with all OSS components and can be used in conjunction with Zimmer Biomet’s industry-unique Compress® Device. Device expansion and lengthening is achieved through a minimally invasive procedure.

  • Minimally invasive lateral access expansion
  • Cleared for use with the clinically proven Compress Device3–5
  • Available in Reduced Size (RS) options for pediatric use
  • Multiple distal femoral replacement lengths of 15-25 cm
  • Expansion lengths ranging from 3-13 cm provide a variety of options to best match leg lengths with the contralateral leg
  • Minimal instrumentation required for lengthening
  • Compatible with OSS components
  1. Molenaers, B. et al. Complex total knee arthroplasty using resection prostheses at midterm follow-up. The Knee. 19: 550-554, 2012.
  2. Berend, K. et al. Distal Femoral Replacement in Nontumor Cases with Severe Bone Loss and Instability. Clinical Orthopaedics and Related Research. 467:485-492, 2009.
  3. Healey, J. et al. Compress Knee Arthroplasty Has 80% 10-year Survivorship and Novel Forms of Bone Failure. Clinical Orthopaedics and Related Research. 2013 Mar; 471(3): 774-783.
  4. Zimel, M et al. Revision Distal Femoral Arthroplasty with the Compress Prosthesis Has a Low Rate of Mechanical Failure at 10 Years.  Clinical Orthopaedics and Related Research. 2016 Feb; 474(2): 528-536.
  5. Farfalli, GL et al. Early equivalence of uncemented press fit and Compress femoral fixation. Clinical Orthopaedics and Related Research 2009; 467: 2792-9.

Legal Manufacturer:                      

Biomet Orthopedics
56 East Bell Drive
P.O. Box 587
Warsaw, Indiana 46581 USA

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Talk to your surgeon about whether joint replacement or another treatment is right for you and the risks of the procedure, including the risk of implant wear, loosening or failure, and pain, swelling and infection. Zimmer Biomet does not practice medicine; only a surgeon can answer your questions regarding your individual symptoms, diagnosis and treatment.