Purpose.To determine the associations among PFM, trochlea groove morphology, femoral and patellar rotation and to determine which measures best predict patellofemoral pain (PFP).Material & Methods.
Knees of 51 female patients with PFP and 26 healthy female volunteers as control group were analysed with kinematic magnetic resonance imaging and full weight-bearing.The bisect Cleaning Supplies offset (BSO), patellar tilt angle (PTA), femoral rotation angle (FRA), patellar rotation angle (PRA) were measured in steps of 10° between 0° to 50° of knee flexion.Static measures of Insall-Salvati ratio (ISR), sulcus angle (SAB & SAC) and lateral trochlear inclination at bone and cartilage levels (LTIB & LTIC) were performed and compared.
Results.The SAB & SAC were higher and Graded the LTIB & LTIC were lower in patients compared to volunteers.BSO, PTA, PRA and medial FRA were higher in the PFP group at all flexion angles.
A multiple logistic regression analysis demonstrated that increase of FRA and SAB by 1° increased the likelihood of PFP 5.6 times and 1.6 times respectively, decrease of PRA by 1° decrease PFP likelihood by 1.
7 times.Conclusion.These results revealed FRA, SAB and PRA to have best predictive value for patellofemoral pain.
Current findings can help to assess the complexity of predisposing factors for PFP in practice.