The posterior-anterior-flexed view is essential for the evaluation of valgus osteoarthritis. A prospective study on 134 valgus knees

摘要

Lateral minJSW in mm for the AP- and PA-flexed-radiographs in 134 valgus knees. 76.1% of the knee showed “bone on bone” joint space narrowing on the PA-flexed view compared to only 36.6% on the AP view. The additional use of a PA-flexed view increased the OA grading level in 53 of 85 knees (62.4%)