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• W2949402525 abstract "BackgroundOsteoporotic proximal femoral fractures associated to falls are a major health burden in the ageing society. Recently, bone strength estimated by finite element models emerged as a feasible alternative to areal bone mineral density as a predictor of fracture risk. However, previous studies showed that the accuracy of patients' classification under their risk of fracture using finite element strength when simulating posterolateral falls is only marginally better than that of areal bone mineral density. Patients tend to fall in various directions: since the predicted strength is sensitive to the fall direction, a prediction based on certain fall directions might not be fully representative of the physical event. Hence, side fall boundary conditions may not be completely representing the physical event.MethodsThe effect of different side fall boundary and loading conditions on a retrospective cohort of 98 postmenopausal women was evaluated to test models' ability to discriminate fracture and control cases. Three different boundary conditions (Linear, Multi-point constraints and Contact model) were investigated under various anterolateral and posterolateral falls.FindingsThe stratification power estimated by the area under the receiver operating characteristic curve was highest for Contact model (0.82), followed by Multi-point constraints and Linear models with 0.80. Both Contact and MPC models predicted high strains in various locations of the proximal femur including the greater trochanter, which has rarely reported previously.InterpretationA full range of fall directions and less restrictive displacement constraints can improve the finite element strength ability to classify patients under their risk of fracture." @default.
• W2949402525 created "2019-06-27" @default.
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• W2949402525 date "2019-08-01" @default.
• W2949402525 modified "2023-10-18" @default.
• W2949402525 title "The effect of boundary and loading conditions on patient classification using finite element predicted risk of fracture" @default.
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• W2949402525 doi "https://doi.org/10.1016/j.clinbiomech.2019.06.004" @default.
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