Patella malalignment, pain and patellofemoral progression: the Health ABC Study D.J. Hunter, M.B.B.S., Ph.D., Y.Q. Zhang, D.Sc., J.B. Niu, M.D., D.T.

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Presentation transcript:

Patella malalignment, pain and patellofemoral progression: the Health ABC Study D.J. Hunter, M.B.B.S., Ph.D., Y.Q. Zhang, D.Sc., J.B. Niu, M.D., D.T. Felson, M.D., K. Kwoh, M.D., A. Newman, Ph.D., S. Kritchevsky, Ph.D., T. Harris, M.D., M.S., L. Carbone, M.D., M. Nevitt, Ph.D., MPH Osteoarthritis and Cartilage Volume 15, Issue 10, Pages 1120-1127 (October 2007) DOI: 10.1016/j.joca.2007.03.020 Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 Method used to measure medial and lateral displacement using the bisect offset measurement28. This was determined by drawing a line connecting the posterior femoral condyles (AB) and then projecting a perpendicular line anteriorly through the deepest portion of the trochlear groove (CD) to a point where it bisected the patellar width line (EF) (left). To obtain data when the trochlear groove was flattened, the perpendicular line was projected anteriorly from the bisection of the posterior condylar line (right). The bisect offset represents the extent of the patella lying lateral to the midline and is expressed as the percentage of patellar width. Osteoarthritis and Cartilage 2007 15, 1120-1127DOI: (10.1016/j.joca.2007.03.020) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Method used to measure the sulcus angle30. This angle was defined by lines joining the highest points of the medial and lateral condyles and the lowest point of the intercondylar sulcus (AB and CB) (left). In order to obtain data when the trochlear groove lacked discernible depth, the center of the sulcus angle was defined by a perpendicular line that was projected anteriorly from the bisection of the posterior condylar line (right). All sulcus angle measurements are reported in degrees. Osteoarthritis and Cartilage 2007 15, 1120-1127DOI: (10.1016/j.joca.2007.03.020) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 Method used to assess patellar tilt29. Patellar tilt was defined as the angle formed by lines joining the maximum width of the patella (AB) and the posterior femoral condyles (BC). All tilt measurements will be reported in degrees. Normal tilt ranges from 0° to 5°, and tilt angles of greater than 10° are abnormal. Osteoarthritis and Cartilage 2007 15, 1120-1127DOI: (10.1016/j.joca.2007.03.020) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions