Quote:My understanding of microfracture surgery is that it is only a temporary solution to the loss of knee cartilage. This is because the new cartilage created is a weaker type of cartilage than the original knee cartilage.


If he had microfracture six or seven years ago, it's possible that the weaker cartilage in his knee is beginning to break down now.



Edit*: All my information is gleaned from the internet, so take my medical opinion with a bucket of salt.