Fig. 4From: Proximal tibial morphology and risk of posterior tibial cortex impingement in patients with AA-sized Oxford unicompartmental knee arthroplasty tibial implantsComparison between the tibial keel and posterior tibial cortex distances among patients with different proximal tibial morphology. a A larger ∠ M1 with a smaller distance between the keel and posterior cortex. b A smaller ∠ M1 with a larger distance between the keel and posterior cortexBack to article page