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Blackburne and Peel Method



- Discussion:
    - ratio between perpendicular distance from lower articular margin of patella to tibial plateau (A) and the length of articular surface of patella (B) (use lateral view w/ knee in at least 30 deg of flexion);
    - AB ratio in 171 normal knees was 0.80 w/ no gender diff;
    - Aglietti, et al. (1983)
    - 150 Rt. knees: AB ratio = 0.95 w/ range of 0.65 to 1.38
          - Patellar pain and incongruence. I: Measurements of incongruence.


Observations on patellar height after proximal tibial osteotomy.