system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can’t Drs lubricate or cushion your joints to cure arthritis?

I’ve seen some operations where they replace joints like the hips completely, why not some car tiles he replacement to cure it?
gpt
They can and it is a simple in office procedure that many orthopedic offices do offer. It’s an injection called Joint Fluid Therapy. The problem is that they haven’t found a lubricant that lasts, so the procedure is more of a relief from the pain/ a way to delay the need for a joint replacement.