In brief: The lifespan of a replacement varies with the individual and with use; realistic expectations are among the most important determinants of satisfaction after surgery.
Factors Affecting Lifespan
- Age and activity level
- Body weight
- Bone quality
- Surgical technique and implant positioning
- Accompanying conditions
- Post-operative exercise and follow-up
What Can You Do After a Replacement?
Low-impact activities such as walking, swimming and cycling are generally recommended. Running, contact sports and activities involving jumping are limited because they increase the load on the implant. Definitive advice is given individually by your physician.
Why Do Realistic Expectations Matter?
A replacement aims to reduce pain and improve function; it does not return the knee to the state it was in at twenty. Some restriction of movement may remain, and some patients experience numbness around the knee. Discussing these expectations before surgery has a marked effect on satisfaction afterwards.
Why Should Follow-Up Continue?
Even without symptoms, regular check-ups allow problems such as loosening to be recognised early. New pain, swelling or fever should prompt review without delay.
Frequently Asked Questions
Is there an age limit for replacement surgery?
There is no strict age limit; the decision is based on the severity of symptoms, general health and expectations. In younger patients, the likelihood of future revision is also taken into account.
Both my knees hurt — can they be operated on at the same time?
In some patients both sides can be done in the same session; however, this depends on general health and risk assessment.
Will the implant set off metal detectors?
Some implants may trigger detectors. Carrying a document describing your surgery makes travelling easier.
Related Pages
This article provides general health information and does not replace an in-person medical examination. Diagnosis and treatment require a physician’s clinical assessment. Outcomes may vary from person to person.