Questions & Answers · Knee
Am I too young for a knee replacement?
There's no magic minimum age for knee replacement — modern implants commonly last 15–20+ years, and we replace knees for patients in their 40s and 50s when arthritis is advanced and life keeps shrinking. The real question isn't your birthday; it's how much living the knee is costing you, weighed against the possibility of a revision decades from now.
The actual math
A 50-year-old with a bone-on-bone knee faces a real chance of one revision surgery late in life — in exchange for two or three active decades now. A 50-year-old who waits until 65 "to be safe" spends fifteen years planning around pain to maybe avoid one future operation. When it's framed that way, patients usually know their answer. Our job is the honest imaging read and implant-lifespan facts; yours is the values call.
What we try first for younger knees
Everything, sincerely: strengthening, activity redesign, injections, PRP where the evidence supports it, and joint-preservation options like partial replacement or osteotomy for the right anatomy. Young knees earn the most creative "not yet" plans in the building.
Medically reviewed by Keith W.V. Johnson, MD, FAAOS · Updated September 28, 2026