Feeling your pain!
Everyone is different. I tore my ACL 13 years ago in high school football which was 1988 and they never found it until 1994 due to my knee not being unstable. Even the MRI didn't show it. But due to the fact that it had been so long and my legs were very strong especially in the hamstrings, they removed the ligament and to this day I have never had it replaced. Even without the ACL, I have no instability (although I still wear a CTi2) and very little pain every now and again. The Ortho said that I was a rare case, but it weas due to the strength of my legs making up for the loss. On the flip side, I have an 11 year old son who was the starting QB on his 6th grade football team, starting pitcher in baseball, and a starter in basketball, and a very good MX rider. Back in August 2001, during the first football scrimmage of the year, he was hit in the knee while running a QB sweep and we found out that he has torn his ACL, and MCL completely in two as well as cartilage damage. And because of his age, no surgeon will touch him! They say that his growth plates are still active and having surgery now could stop his leg from growing any further!!:scream: He wears a CTi2 and continues to ride and jump and all of that, although the doctors have said that he may never play football, basketball or baseball for at least 5 to 6 years if ever!:ugg: He has a tough time dealing with this as well as I do because he is a very gifted athlete who lost something very special to him as the result of one hit! He will have to have surgery eventually in about 5 or 6 years, although the 4 surgeons he has already seen have said that if we wait that long, he will continue to damage his cartilage and bone in the knee until then if he continues to be very active. Needless to say, trying to keep an athlete from being very active, is almost impossible!! I am sorry for rambling on about my son, but I am very depressed for him and don't know what else to do or where else to turn.:(
Good luck with your knee and Godspeed!