Stryker Knee Replacement Weight: Implant Components & Total Mass

Stryker Knee Replacement System Weight

The total weight of a Stryker total knee arthroplasty (TKA) implant varies by system, size, and component materials. Average total implant weight: ~1 pound (0.45 kg / 450 g).

Component Breakdown (Typical)

• Femoral component: ~200–300 g (cobalt-chromium alloy)
• Tibial baseplate: ~100–150 g (titanium or cobalt-chrome)
• Tibial insert (polyethylene): ~50–80 g
• Patellar component (if resurfaced): ~30–50 g (polyethylene)

Stryker Knee Systems

• Triathlon: Single-radius design; widely used
• Scorpio NRG: Anatomic shaped femoral
• Gamma3/NCB: Revision/complex systems (heavier)
• Mako SmartRobotics: Robotic-assisted; same implants

Clinical Context

• Implant weight is negligible vs. body weight
• Does not affect rehabilitation, function, or airport security
• Component fixation (cemented vs. cementless) adds minimal cement weight (~50–100 g)
• Patient perception of "heaviness" relates to swelling, weakness, or proprioception—not implant mass

Discuss specific implant selection with your surgeon based on anatomy, activity, and surgeon experience.