What can I expect after a knee replacement?

What does early recovery feel like?

Swelling, stiffness, and aching are common while the knee heals. Walking begins in small amounts, and exercises help you regain bend and strength. Some weeks go better than others during this early work. Strength and balance often return after the wound has closed.

Recovery often takes much longer than skin healing does.

How long might the new joint last?

A knee implant means the man-made parts put in during replacement. Among people with total knee replacements, 89.7% had not needed those parts replaced again at twenty years. Your health, weight, age, and activity may affect how long they last.

A second operation is harder than the first.

Why can the knee still feel different?

Replacement changes worn joint surfaces, but it doesn't restore your natural knee. Kneeling may stay awkward, and some stiffness can remain. Muscles weakened before surgery also need time and exercise. Even a properly done operation can leave soreness during normal movement.

Ask what the new knee may not change.

What can I do during recovery?

Follow the walking and exercise plan from your care team. Accept help at home until standing, bathing, and making meals are safe. Take medicine only as directed. Keep your visits even when progress feels slow.

You can't rush healing, but regular work still matters later.

When should I call the surgeon?

Call promptly for fever, drainage, spreading redness, or soreness that suddenly becomes severe. Calf swelling, warmth, or trouble breathing also needs urgent care. For slower concerns, write down the exact change and when it began.

Call now rather than waiting if you suddenly feel ill.

Sources

1. A population-based cohort of 54,276 total knee replacements followed up to 20 years found a 10-year implant survival of 96.1% and 20-year survival of 89.7%. Lifetime risk of revision surgery was about 5% for patients operated after age 70, but rose sharply for younger patients — the central argument for not operating earlier than necessary.

   Bayliss LE, Culliford D, Monk AP, et al. — The effect of patient age at intervention on risk of implant revision after total replacement of the hip or knee: a population-based cohort study.. The Lancet, 2017. DOI: 10.1016/S0140-6736(17)30059-4.

2. In a randomized trial of 100 patients with moderate-to-severe knee OA eligible for total knee replacement, TKR followed by 12 weeks of non-surgical care improved the KOOS4 score more than the same non-surgical programme alone (32.5 vs 16.0 points; adjusted mean difference 15.8, 95% CI 10.0 to 21.5) — but produced four times as many serious adverse events (24 vs 6, P=0.005), and 26% of the non-surgical group had chosen surgery within 12 months, meaning roughly three-quarters had not.

   Skou ST, Roos EM, Laursen MB, et al. — A Randomized, Controlled Trial of Total Knee Replacement.. New England Journal of Medicine, 2015. DOI: 10.1056/NEJMoa1505467.

3. A cross-sectional study of 1,703 primary total knee arthroplasties in Ontario found approximately one in five patients (19%) were NOT satisfied with the outcome. Satisfaction with pain relief ranged 72-86% and with function 70-84% by activity. The strongest predictor of dissatisfaction was expectations not being met (10.7x greater risk).

   Bourne RB, Chesworth BM, Davis AM, Mahomed NN, Charron KD. — Patient satisfaction after total knee arthroplasty: who is satisfied and who is not?. Clinical Orthopaedics and Related Research, 2010. DOI: 10.1007/s11999-009-1119-9.

4. In the Chingford Women's Study followed 14+ years, radiographic knee OA prevalence rose from 13.7% at a median age of 53 to 47.8% by year 15, with an annual cumulative incidence of 2.3% and annual progression and worsening rates of 2.8% and 3.0%. Women with a K/L grade of 1 at baseline were 4.5 times more likely to worsen than those graded 0.

   Leyland KM, Hart DJ, Javaid MK, et al. — The natural history of radiographic knee osteoarthritis: a fourteen-year population-based cohort study.. Arthritis & Rheumatism, 2012. DOI: 10.1002/art.34415.