Part II: The 50 degrees /60 degrees fibular tunnel trajectory for posterolateral corner reconstruction in a cadaver model Journal Article uri icon

abstract

  • PURPOSE: Using data from our MRI study, we found that a tunnel oriented 50 degrees externally rotated and 60 degrees cephalad would better connect the fibular collateral ligament (FCL) insertion to the popliteofibular ligament (PFL) insertion as compared to a traditional anterior-to-posterior (A-P) fibular tunnel. The purpose of this study was to test that finding in a cadaver model. METHODS: In eight cadaver knee pairs (16 knees), a guide pin was driven from the fibular FCL insertion point in a 50 degrees externally rotated and 60 degrees cephalad trajectory in 8 knees, and in a traditional A-P trajectory in the contralateral 8 knees. Proximity of the pin to the native PFL insertion, the peroneal and tibial nerves was measured, followed by drilling over the guide pin and measuring the remaining fibular bone stock. RESULTS: In comparison with the A-P fibular tunnel technique, the 50 degrees /60 degrees technique resulted in a fibular exit point significantly closer to the native PFL insertion (p < 0.01). Both techniques were safe with regard to the tibial and peroneal nerves. There were no instances of fibular wall blowout in either technique; however, there was less superior bone remaining in the 50 degrees /60 degrees technique (p < 0.04). CONCLUSION: In a cadaveric model, the 50 degrees /60 degrees technique for PLC reconstruction resulted in a more anatomic-based tunnel than an A-P fibular tunnel.

publication date

  • 2015