QUOTE(edvey @ Mar 26 2012, 07:56 PM)
would you mind explain?
ps: speaking from experience here
for me it;s how determined u are
before and after the surgery.
good luck bro.

Explanation to: "...research has shown that ACL reconstruction predisposes to a higher incidence of osteoarthritis (OA)..."
To quote PubMed:
QUOTE
Daniel et al. determined that both acute and chronic ACL-reconstructed knees had significantly greater radiographic evidence of osteoarthritis compared with the conservatively treated group.
This means that an ACL reconstruction, as compared to conservative treatment (application of physiological therapeutics), given the same amount of time, surgery will cause your knee to have a higher chance of developing OA of the knee. OA is the wearing and tearing of the articular cartilage of the bones, causing bone-on-bone contact. This significantly reduces the quality of life, as it causes pain during movement of any set of joints that has OA.
Explanation to: "...the outcome of conservative treatment over surgery has no difference, as research has shown..."
To quote PubMed, again:
QUOTE
Current conservative (e.g. rehabilitation) and surgical (e.g. reconstruction) treatment options appear not to reduce osteoarthritis following ligament injury.
By "outcome", i mean "post-surgery". In the view of post-surgery, there is no decreased risk of developing OA.
In terms of recovery, of course surgery provides a faster route to solving the ACL-tear. And in terms of quality of life, surgery appears to restore a certain amount of quality of life. But then again, we should be able to see things in the long-run, and not rather just cure-now-think-later. Surgical intervention will undeniably cost you a bomb, while restoring your quality of life temporarily, you are at risk of an earlier development of OA as compared to those who treated it conservatively.
So to say, ACL/PCL injuries of the knees are really debilitating, as no matter what, you're doomed for osteoarthritis

PubMed source:
Ligament Injury, Reconstruction and Osteoarthritis