Proximal tibial morphology and its correlation with osteochondritis dissecans of the knee.

Purpose: The relationship of proximal tibial morphology to the presence of femoral osteochondritis dissecans (OCD) lesions is unknown. This radiographic study tested the null hypothesis that knees with unilateral medial or lateral OCD lesions would have no difference in the slope of their medial, lateral, or posterior tibial plateau compared with unaffected knees.

Methods: There were 72 patients with unilateral OCD lesions of the medial or lateral femoral condyle seen at our institution from 2005 to 2011.

Part II: The 50°/60° fibular tunnel trajectory for posterolateral corner reconstruction in a cadaver model.

Purpose: Using data from our MRI study, we found that a tunnel oriented 50° externally rotated and 60° 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° externally rotated and 60° cephalad trajectory in 8 knees, and in a traditional A-P trajectory in the contralateral 8 knees.