February 5, 2026
Author: Dr. Alexandru Grecu — Senior Orthopedic and Trauma Surgeon
Medically reviewed by Dr. Alexandru Florian Grecu, Senior Orthopedic Surgeon · Published: February 5, 2026 · Updated: 2 mai 2026
Knee replacement is not the first treatment option—and it shouldn't be. Osteoarthritis is a condition with multiple stages, and for most patients, there are effective treatments that can maintain quality of life for years without surgery: physical therapy, injections, and activity modification.
But there comes a time when these treatments are no longer enough. That moment isn't determined by a single criterion—it's a combination of symptoms, imaging, and, most importantly, how the pain affects your life.
As an orthopedic surgeon, I never recommend a knee replacement based solely on an X-ray. I recommend a replacement when the patient tells me, "I can't live like this anymore."
You've tried anti-inflammatory drugs, pain relievers, injections—and they are working less and less, or not at all. When the medication "cocktail" that kept your pain under control is no longer effective, it's a clear sign that the joint has exceeded the capacity of conservative treatments.
You can no longer go to the store, to the market, or for a simple walk. The distances you can cover have progressively shortened. Some patients don't realize how much they've adapted their lives—giving up stairs, outings, social activities—until it's pointed out to them.
This is a significant sign. When pain no longer occurs only with exertion but also when you are sitting, sleeping, or turning over in bed—it means the joint is in an advanced stage of distress.
"Bow-legged" (genu varum) or "knock-kneed" (genu valgum) deformities that were not there before. The deformity indicates a loss of cartilage in one compartment, with progressive misalignment. This is also a factor that, if it continues to progress, can complicate a future surgical intervention.
When the two bones are in direct contact—"bone on bone"—and osteophytes are visible, we are in stage IV osteoarthritis. At this stage, conservative treatments can only offer temporary and limited relief.
Postponing is not inherently dangerous as long as the pain is tolerable and your quality of life remains acceptable. But excessive delay—years during which muscles atrophy, the knee deforms, and walking deteriorates—can make the surgery more difficult and recovery longer.
Specifically: a patient who comes for a replacement with relatively preserved muscle mass and moderate deformity will recover more easily than a patient who has been immobilized in an armchair for years, with atrophied muscles and severe deformity. There is no "perfect" time—there is a "right" time, which we identify together.
If you identify with 1-2 of the signs above, but not all of them, it's probably not time yet. Options worth exploring include:
The decision for a replacement is always made together—doctor and patient. During the consultation, I assess:
Then we discuss openly: benefits, risks, realistic expectations, and the remaining alternatives. There is no pressure—there is information.
→ Learn more about knee replacement
If you and your doctor have decided that a replacement is the right solution, I have created a comprehensive brochure with everything you need to know for preparation and recovery:
📄 Download Brochure: Patient Guide for Knee Replacement Surgery (PDF)