Choosing treatment and surgery
How long can a knee implant last?
Duration depends on the implant, fixation and the individual course.
At a glance
- Separate implant survival from pain and function.
- Assess condition rather than a fixed replacement year.
- Maintain safe activity and report new symptoms.
Keep your follow-up appointments to check implant fixation and wear. Continue the strength exercises and weight-management plan agreed with your care team. If new pain or swelling develops, or your walking changes, arrange a review to identify the cause.
Review a knee for long-term use
- 01
Status
Fixation, wear and infection assessment
- 02
Daily care
Strength, balance and low-impact activity
- 03
Follow-up
New changes and planned examination and imaging
Implant status, daily management and follow-up
How long can a knee replacement last?
Long-term registry data estimated that about 82% of total knee replacements and 70% of partial knee replacements were still in place without revision surgery at 25 years. The precise estimates in the 2019 Lancet review were 82.3% and 69.8%, respectively.
These figures come from historical surgical cohorts in Finland. The life of an individual knee replacement varies with age at surgery, the implant, its fixation, and activity level. Total and partial replacement are also used in different patients and knee conditions, so these percentages alone do not determine which operation to choose. Continue to monitor pain and walking ability. If new pain or swelling persists, seek assessment before your next routine appointment.
Revision is not only about wear
Plastic wear, loosening, instability, infection or a fracture around the implant can lead to revision consideration. Early pain does not automatically mean the implant is worn out.
Examination, imaging and appropriate tests distinguish the cause. A well-fixed, symptom-free implant is not routinely changed merely because it is old.
Maintain activity and overall health
Low-impact activity supports strength, balance and function. If appropriate, manage weight without compromising nutrition, and prevent falls and injury.
Discuss running, jumping and other high-impact activities with the surgical team. Avoiding all movement to protect longevity can instead reduce strength and general health.
Attend follow-up and report change
Seek review for new pain, swelling, giving way or reduced activity in a previously comfortable knee. Infection can occur beyond the early postoperative period and without fever.
Follow the team’s clinical and imaging review plan, and keep the operation date and implant details. A particular product or robot does not itself guarantee longer survival.
Common Questions
Must it be replaced after a certain number of years?
The decision depends on symptoms, fixation, wear and other problems, not one universal date.
Does clicking mean it is worn out?
Sound alone does not establish failure. Assess new pain, swelling or instability.
Will avoiding exercise make it last longer?
Safe activity supports function. Discuss high-impact activities separately rather than avoiding all movement.
Evidence and references
01When to seek medical care
Each warning sign is a separate reason to seek care. Follow the action below if any one applies.
Emergency department · call 119 in Korea
- Call 119 for sudden breathlessness or chest pain, severe faintness or loss of consciousness. Do not wait for calf swelling to appear.
- Go to an emergency department if you suddenly cannot bear any weight, or if an injured knee swells rapidly or looks deformed. A cold or numb foot after injury also needs immediate assessment.
- Seek emergency care for a hot, swollen and severely painful joint with high fever, shaking chills, confusion or inability to bear weight.
- With back or leg pain, go immediately to an emergency department for new difficulty passing urine, loss of bladder or bowel control, or numbness around the genitals or anus. Severe or rapidly worsening weakness or numbness in both legs also needs immediate assessment.
Same-day assessment
- Arrange assessment today for a newly hot, swollen joint, sudden severe pain, or a knee locked so that it cannot fully straighten. Joint infection can occur without fever.
- Have new swelling or pain in one calf assessed today for a possible blood clot. Call 119 immediately if breathlessness or chest pain develops.
- Severe knee pain or a new limp in a growing adolescent may come from a hip condition such as slipped capital femoral epiphysis. Stop walking and sport and arrange assessment today. Go directly to emergency care if they cannot bear weight.
- Stop running and seek assessment today for new recurring groin pain, pain with walking or at night, or a limp. A femoral neck stress fracture needs to be considered. Keep weight off the painful leg until assessed. Go to emergency care if you cannot bear weight.
Book an outpatient appointment
- If none of the warning signs above is present, book an appointment for pain lasting a few weeks, repeated swelling or reduced daily activity and exercise.