When is the right time to consider a knee replacement?
There is no perfect age or specific point at which surgery becomes necessary. Instead, the decision is based on how much your knee symptoms are affecting your quality of life and whether non-surgical treatments are continuing to provide adequate relief.
Signs It May Be Time to Consider Knee Replacement
You may wish to consider knee replacement surgery if:
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Knee pain is present on most days
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Walking distances are becoming increasingly limited
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Pain is affecting your sleep
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Everyday activities such as shopping, gardening or climbing stairs are becoming difficult
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You have stopped activities you enjoy because of knee pain
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Pain relief medication is becoming less effective
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Physiotherapy, injections and other treatments are no longer controlling your symptoms
For many patients, the decision comes when knee pain begins to have a significant impact on daily life.
Do xrays determine when surgery is needed?
X-rays are an important part of the assessment, but they do not tell the whole story.
Some patients have severe arthritis on their X-rays but relatively few symptoms. Others experience significant pain despite less advanced changes. The decision to proceed with surgery should be based on both your symptoms and the findings on examination and imaging.
ACHE tool
The Arthroplasty Candidacy Help Engine (ACHE) is a research-based tool designed to help predict how much a patient is likely to benefit from knee replacement surgery.
The ACHE tool uses a scoring system called the Oxford Knee Score (OKS).
The OKS is a validated questionnaire that measures the severity of knee symptoms and their impact on everyday activities. It consists of 12 questions covering areas such as pain, mobility and function. Each question is scored from 0 to 4, giving a total score between 0 and 48.
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0 = Severe symptoms and poor knee function
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48 = Minimal symptoms and excellent knee function
Research has shown that an improvement of 7 points or more following knee replacement surgery represents a meaningful improvement in symptoms and function.
The ACHE tool is based on data from thousands of patients who completed Oxford Knee Scores before and after knee replacement surgery. Using your age, sex and Oxford Knee Score, the tool estimates your likelihood of achieving a meaningful improvement following knee replacement.
The tool is intended to support decision-making and should not replace a detailed clinical assessment, examination and review of your X-rays.
Try the ACHE tool below to see whether you could benefit from a knee replacement.
ACHE tool
The ACHE tool is designed to support decision-making and does not determine whether knee replacement surgery is appropriate for an individual patient. Specialist assessment remains essential.
Seeking specialist advice
If you are unsure whether the time is right for knee replacement surgery, a specialist assessment can help.
Following a detailed history, examination and review of your X-rays, I can discuss the treatment options available and advise whether continued non-surgical treatment, partial knee replacement or total knee replacement is most appropriate for you.