Yes, knee cartilage can repair itself to some extent, contrary to previous beliefs.
While it was once thought that cartilage in human joints was incapable of self-repair, recent research from Duke Health suggests that a repair mechanism similar to limb regeneration in creatures like salamanders and zebrafish exists within human cartilage. This repair process is more active in ankles compared to knees and hips, potentially explaining why ankle injuries heal more readily.
This discovery opens possibilities for developing treatments to stimulate cartilage regrowth in joints affected by osteoarthritis and injuries. Although the body possesses a natural capacity for cartilage repair, it is limited and varies depending on the joint. Further research is needed to fully understand and harness this regenerative potential.
In short, the ability of knee cartilage to regrow exists, but it is limited and influenced by factors such as age and the specific location within the joint. Further scientific advancements may enhance this natural regenerative capacity.
