Anatomical risk factor analysis of posterior cruciate ligament tibial avulsion fracture in adults

• Patients with posterior cruciate ligament tibial avulsion fracture exhibit significantly smaller intercondylar notch width index, intercondylar notch shape index, intercondylar notch angle, and medial tibial posterior slope compared to controls. • Intercondylar notch width index is identified as an independent risk factor for posterior cruciate ligament tibial avulsion fracture. • No significant differences were found in intercondylar notch width, femoral condyle width, intercondylar notch height, Blumensaat's line inclination angle, or lateral tibial posterior slope between groups. • The study provides evidence that specific anatomical features of the distal femur and proximal tibia contribute to the risk of posterior cruciate ligament tibial avulsion fracture.