Scorpio® Total Knee System

The Scorpio® NRG Knee System design is based on natural knee mechanics. This design has potential to provide a variety of benefits which will allow a quicker return to activities of daily living, such as walking, rising from chairs and going up and down stairs. 1,2,3,4

The Scorpio® NRG Knee System philosophy is designed to mimic natural knee motion, thereby enhancing stability and mobility in activities such as going up and down stairs and gardening. Scorpio's single radius design is intended to work with the body to promote natural circular-like motion. 5,6,7 A single-radius design means that as your knee flexes, the radius is the same, similar to a circle, potentially requiring less effort from your quadriceps muscle. 8


Strong clinical history

The Scorpio NRG knee femoral and tibial components are manufactured from Cobalt Chromium Alloy, a material that has over 70 year’s history of use in the manufacture of surgical implants for its high degree of compatibility and strength within the body.

Scorpio NRG Knee is designed to resist wear by using advanced bearing surfaces. 9 The bearing surface is the place where the two parts of the knee glide together throughout motion. X3 TM bearing surface technology available with the Scorpio NRG Knee System has demonstrated a lower wear rate in laboratory testing, which may result in a longer lasting implant. 9

Clinical References
  1. Serpe, L et al; Abstract: Conformity Without Constraint: The use of a Single Medio-Lateral Radius Design in TKA. Presented at the 45th Annual Meeting of the Orthopaedic Research Society. 1999
  2. Mahoney, O et al; Improved Extensor Mechanism Function with the Scorpio Total Knee Replacement. Presented at the 45th Annual Meeting of the Orthopaedic Research Society. 1999
  3. Hollister, A et al; The axis of Rotation of The Knee. Clinical Orthopaedics and Related Research, 1993. 290:259-268
  4. Corrspondent: Beadling, L; Bettter Extensor Mecahnism Function Documented. Orthopaedics Today 1999.
  5. Wang H,et al; OM. Biomechanical differences exhibited during sit-to-stand between total knee arthroplasty designs of varying radii.
    J Arthroplasty. 2006;21(8):1193-1199.
  6. Designed to maintain collateral ligament stability throughout the range of motion. Stryker-Initiated Dynamic Computer Simulations of
    Passive ROM and Oxford Rig Test, Stephen Piazza, 2003.
  7. Gómez-Barrena E, et al; Functional performance with a single-radius femoral design total knee arthroplasty. Clin Orthop Relat Res.
  8. Ostermeier S, Stukenborg-Colsman C. Quadriceps force after TKA with femoral single radius. Acta Orthop. 2011;82(3):339-343.
  9. Stryker Orthopaedics Test Report: RD-06-013
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