When a knee replacement can wait, and when it cannot
Surgeons and regenerative clinics often disagree about timing. Here is how the decision actually gets made, and the imaging that settles it.
The four grades, and why grade 3 is the argument
Radiologists grade osteoarthritis from 1 to 4 on how much joint space has been lost. Grades 1 and 2 rarely justify surgery. Grade 4, with bone touching bone, rarely responds to anything but replacement. Almost every difficult conversation happens at grade 3.
At that stage the cartilage is thin but present, and inflammation is doing much of the damage you feel. That is the window where reducing inflammation can change how the joint behaves for a year or more, which is not the same as rebuilding it.
Ask your surgeon what your radiographic grade is. If nobody has told you a number, nobody has told you enough to decide.
What to bring to either consultation
Whether seeking a surgical opinion or exploring regenerative therapy, accurate diagnosis requires clear weight-bearing imaging:
- Weight-bearing X-rays from the last twelve months
- An MRI if you have one, though it is not always necessary
- A written list of what you have already tried, and for how long
- What you actually want back: stairs, sleep, a specific distance
Not sure which grade you are?
Send your imaging. A physician reads it and tells you whether treatment here is worth considering.
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