77 patients with a symptomatic unilateral chronic ACL rupture were randomized to reconstruction using hamstring autograft with the use of either poly-L-lactide acid (PLLA) or metal interference screw fixation. At 8 years follow up, the PLLA screw for hamstring tendon (HT) autograft fixation in ACL repair was found to have a significantly larger femoral bone tunnels compared to metal interference screws. However, these observations were not associated with any differences in the clinical outcome measurements.
Am J Sports Med. 2010 Aug;38(8):1598-605. Epub 2010 Apr 14.
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