Abstract
Purpose: We have developed a highly reliable and quantitative custom-designed patellofemoral arthrometer (PFA) and demonstrated that a decrease in knee flexion angle is associated with a decrease in inferior patellar mobility in healthy elderly women (OARSI 2017). In addition, a similar tendency was shown in the preliminary study in patients with knee osteoarthritis (OA) (OARSI 2018). A possibility in which the decrease in inferior patellar mobility was a limiting factor of the reduction in knee joint flexion angle was indicated.
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