Posterior cruciate ligament reconstruction in patients with generalized joint laxity.

UNLABELLED: Generalized joint laxity has been considered a risk factor causing late failure of reconstructed anterior cruciate ligaments, although it is unknown whether that is the case for reconstructed posterior cruciate ligaments. We hypothesized patients with generalized joint laxity, compared with those without laxity, would have similar postoperative knee stability, range of motion, and functional scores after posterior cruciate ligament reconstruction. The Beighton and Horan criteria were used to determine generalized joint laxity. We enrolled 24 patients with generalized joint laxity (Group L) and 29 patients without any positive findings of joint laxity (Group N) matched by gender and age. The average side-by-side differences of posterior tibial translation were 4.72 mm in Group L and 3.63 mm in Group N. We observed no differences in posterior tibial translation with differing graft materials or combined procedures. In Group L the International Knee Documentation Committee score was normal in 12.5% and nearly normal in 45.8% whereas in Group N, 24.1% were normal and 55.2% nearly normal. Patients with generalized joint laxity showed more posterior laxity than patients without joint laxity. Generalized joint laxity therefore appears to be a risk factor associated with posterior laxity after posterior cruciate ligament reconstruction. LEVEL OF EVIDENCE: Level III, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.