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Fig. 5 | Journal of Orthopaedic Surgery and Research

Fig. 5

From: The effect of distal tibial tuberosity high tibial osteotomy on postoperative patellar height and patellofemoral joint degeneration

Fig. 5

Radiological measurements of knee joint. A The Caton-Deschamps index (CDI) = a/b. CDI is the length from the distal end of the patellar joint surface to the anterior tip of the tibial tuberosity, divided by the length of the patellar joint surface. B Congruence angle (CA) = α. CA is the angle between the line bisecting the sulcus angle and the line that links the lowest point of the intercondylar sulcus to the lowest point on the articular ridge of the patella. C Lateral patellar tilt (LPT) = β. LPT is the angle between the line intersecting the widest bony structure of the patella and the line tangentially passing the anterior surface of the femoral condyles. D The weight-bearing line ratio (WBLR) = c/d. WBLR is the ratio of the horizontal distance from the medial edge of the tibial plateau to the intersection of the weight-bearing line and the entire length of the proximal tibial plateau line

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X