Subject: rejection of cloned cartilage

The new method of inserting cloned cartilage into specific regions has been 
practiced for a while according to my understanding.  Upon further inquiry I happened upon the
knowledge from a orthopedic surgeon that implanting cartilage within the medial 
aspect or inner area of the tibia is impossible( due to the limitations of current 
knowledge) because of the specific properties of the environment there. Does this have 
anything to do with the load bearing requirements of this specific area. What other reasons 
inhibit cartilage from being implanted there that can be implanted in other locations 
where degeneration has begun to manifest.

Re: rejection of cloned cartilage