The prevalence of radiographic and MRI-defined patellofemoral osteoarthritis and structural pathology
Hart, H.F., Stefanik, J.J., Wyndow, N., et al. (2017) B. J. Sports Med. 51(16): 1195-1208.
PF INVOLVEMENT COMMON OA PATTERN
of patients with radiographic and symptomatic knee OA had PF OA.
PF OA PREVALENT AMONG KNEE PAIN SUFFERERS
of patients with knee pain or symptomatic knee OA had radiographic PF OA.
PF DAMAGE COMMON WITH KNEE PAIN
of patients with knee pain had MRI-defined PF structural damage based on cartilage defect.
An analysis of 85 studies revealed that PF OA is prevalent in a wide range of settings, including symptomatic and asymptomatic populations. Around one half of people with knee pain or radiographic knee OA have PF involvement. MRI-defined PF structural damage was calculated for four populations: community, knee pain or symptomatic, radiographic OA, and healthy individuals. For both community and knee pain or symptomatic populations, MRI-defined PF structural damage based on cartilage defect was present in around half of the cases.
Relevance to Spring Loaded Braces
The high prevalence of PF OA among knee pain sufferers and patients with knee OA underscores the importance of knee pain treatments that target pain originating in the PF compartment. Common braces for knee OA include valgus braces that redistribute forces across the tibiofemoral compartments, but these braces do not sufficiently address pain caused by PF OA. Due to its ability to offload joint forces from all three compartments 1– Budarick, A.R. et al. (2020). J. Biomech. Eng. 142(1)
– McGibbon, C.A. et al. 2020. Front. Bioeng. Biotech. doi:10.3389/fbioe.2020.604860, Spring Loaded bracing is a promising solution for many patients who struggle with pain due to PF involvement.