I had surgery for torn cartilage on my knee.  The technique involved drilling five holes in the femur and the 

bone marrow and stem cells leak from the drilled holes into the cut out section and form a big "clot".  This 

clot fills the hole in the cartilage that was cut out by my surgeon. After 6 weeks of non-weight bearing, this 

clot forms a "fibro-cartilage" that is very close to as durable as the original.  The surgery was a great success, 

and I have been able to play extensive, high-level tennis without any problems.  Now I need to start warfarin.  

What are the chances that the warfarin will dissolve the clot and everything coming apart? --  Lee