I'm pretty sure there is a newer technique being used where they poke alot of micro holes in the cartiledge and can then repair itself, can't remember who but some NFL player had it done!!
doctors are like buying a house... it's gonna be a long term investment so find one that is good and knows the newest methods... and you may have to shop around before finding the right one!! I almost had a guy lay me open with outdated techniques, but some stuff came up with my insurance and I moved about a month later to where I found a new doc with updated methods and actually was the ex-team doc for the broncos and tours the countyry occasionally giving seminars on th newest techiniques!! I had minimal cutting and a great recovery, the first guy wanted my leg in a cast for six to eight weeks thus losing alot of flexibility and the ligaments grow together tighter risking more injury in the future, second doc had me in a machine on my back for the first week that kept my leg moving continuously and and me doing exercises and stretchs with it several times a day... by the time I would have been out of my cast with the first doc and ready to begin recovery I was almost finishing recovery with the second doc!! shop around and good luck!!