To introduce the technique of arthroscopic simultaneous reconstruction of posterior cruciate ligament (PCL) using double femoral tunnel, single-bundle transtibial tunnel PCL technique and anterior cruciate ligament (ACL) with achilles allograft, and to evaluate the clinical outcome.
Fourteen patients with PCL and ACL injuries after a minimum follow-up 18 months were received. Arthroscopically assisted simultaneous ACL/PCL reconstruction with achilles allograft were performed using the single-incision endoscopic ACL technique and the double femoral tunnel, single-bundle transtibial tunnel PCL technique. The Lysholm and Tegner knee score scale were used for functional evaluation. All patients were evaluated with physical examination and KT-1000 arthrometer testing. The mean knee flexion was (123.6 +/- 2.5) degrees preoperatively. The Lysholm score was 52.8 +/- 2.2. The Tegner score was 5.9 +/- 0.5 before injury, 1.2 +/- 0.9 preoperatively.
The mean time from injury to the reconstructive procedure was 19.5 d. The mean knee flexion was (117.9 +/- 2.8) degrees postoperatively(t = 1.54, P = 0.14). As to the Lachman test for 14 patients, the results of 13 patients (92.9%) was negative. As to posterior drawer test, the results of 12 patients (85.7%) was negative. The Lysholm score was 92.9 +/- 3.3 at final evaluation (t = 17.009, P < 0.001). KT-1000 arthrometer testing at 25 degrees knee flexion showed that the side-to-side difference was below 2 mm in 9 cases, 3-5 mm in 4 cases, 6 mm in 1 case. At 75 degrees knee flexion the difference was below 2 mm in 10 cases, 3-5 mm in 3 cases, 6 mm in 1 case. The Tegner score was 5.4 +/- 0.8 at final evaluation. The difference between the preoperative score and the postoperative was statistically significant (F = 4.2, P < 0.01).
Combined ACL and PCL injuries can be successfully treated with arthroscopic simultaneous reconstruction of PCL using double femoral tunnel technique and ACL with achilles allograft. The double femoral tunnel technique more closely approximates the anatomic insertion the native PCL. Most patients recover a functionally stable knee.