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Procedures

How long does a knee replacement last?

Medcasts editorial team

Modern total knee replacements have 10-year implant survival rates of 90–95% at experienced centers, and 80–85% at 20 years. Survivorship depends on patient factors (BMI, activity level, age at implantation) and surgeon technique (alignment, balance, soft-tissue handling).

Younger, more active, heavier patients have higher revision rates over time. A 50-year-old with BMI 35 implanted today has a meaningful chance of needing revision in their lifetime; a 70-year-old with BMI 25 will likely never need revision.

What actually drives longevity: implant choice, surgical technique, post-op rehab quality, and weight management long-term. The brand of implant matters less than the surgeon's experience with that specific implant.

This answer is general information, not medical advice. Your own doctor should confirm what applies to your case.

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