TY - JOUR
T1 - Multiple loading conditions analysis can improve the association between finite element bone strength estimates and proximal femur fractures
T2 - A preliminary study in elderly women
AU - Falcinelli, Cristina
AU - Schileo, Enrico
AU - Balistreri, Luca
AU - Baruffaldi, Fabio
AU - Bordini, Barbara
AU - Viceconti, Marco
AU - Albisinni, Ugo
AU - Ceccarelli, Francesco
AU - Milandri, Luigi
AU - Toni, Aldo
AU - Taddei, Fulvia
PY - 2014
Y1 - 2014
N2 - This is a preliminary case-control study on osteopenic/osteoporotic elderly women, testing the association of proximal femur fracture with minimum femoral strength, as derived from finite element (FE) analysis in multiple loading conditions. Fracture cases (n = 22) in acute conditions were enrolled among low-trauma fractures admitted in various hospitals in the Emilia Romagna Region, Italy. Women with no history of low-trauma fractures were enrolled as controls (n = 33). Patients were imaged with DXA to obtain aBMD, and with a bilateral full femur CT scan. FE-strength was derived in stance and fall configurations: (i) as the minimum strength among those obtained for multiple loading conditions spanning a domain of plausible force directions, and (ii) as the strength associated to the most commonly used single loading conditions. The association of FE-strength and aBMD with fractures was tested with logistic regression models, deriving odds ratios (ORs) and area under the receiver operating characteristic curve (AUC).FE-strength from multiple loading conditions better classified fracture cases from controls (OR per SD change = 9.6, 95% CI = 3.0-31.3, AUC = 0.87 in stance; OR = 9.5, 95% CI = 2.9-31.2, AUC = 0.88 in fall) compared to aBMD (OR = 3.6, 95% CI = 1.6-8.2, AUC = 0.79 for total femur aBMD), while FE-strength results from the most commonly used single loading conditions were similar to aBMD. Only FE-strength from multiple loading conditions remained significant in age- and aBMD-adjusted models (OR = 10.5, 95% CI = 1.8-61.3, AUC = 0.95). In summary, we highlighted the importance of considering different loading conditions to identify bone weakness, and confirmed that femoral FE-strength estimates may add value to aBMD predictions in elderly osteopenic/osteoporotic women.
AB - This is a preliminary case-control study on osteopenic/osteoporotic elderly women, testing the association of proximal femur fracture with minimum femoral strength, as derived from finite element (FE) analysis in multiple loading conditions. Fracture cases (n = 22) in acute conditions were enrolled among low-trauma fractures admitted in various hospitals in the Emilia Romagna Region, Italy. Women with no history of low-trauma fractures were enrolled as controls (n = 33). Patients were imaged with DXA to obtain aBMD, and with a bilateral full femur CT scan. FE-strength was derived in stance and fall configurations: (i) as the minimum strength among those obtained for multiple loading conditions spanning a domain of plausible force directions, and (ii) as the strength associated to the most commonly used single loading conditions. The association of FE-strength and aBMD with fractures was tested with logistic regression models, deriving odds ratios (ORs) and area under the receiver operating characteristic curve (AUC).FE-strength from multiple loading conditions better classified fracture cases from controls (OR per SD change = 9.6, 95% CI = 3.0-31.3, AUC = 0.87 in stance; OR = 9.5, 95% CI = 2.9-31.2, AUC = 0.88 in fall) compared to aBMD (OR = 3.6, 95% CI = 1.6-8.2, AUC = 0.79 for total femur aBMD), while FE-strength results from the most commonly used single loading conditions were similar to aBMD. Only FE-strength from multiple loading conditions remained significant in age- and aBMD-adjusted models (OR = 10.5, 95% CI = 1.8-61.3, AUC = 0.95). In summary, we highlighted the importance of considering different loading conditions to identify bone weakness, and confirmed that femoral FE-strength estimates may add value to aBMD predictions in elderly osteopenic/osteoporotic women.
KW - Biomechanics
KW - Bone strength
KW - Case-control study
KW - Finite-element analysis
KW - Osteoporosis
KW - Proximal femur fracture
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U2 - 10.1016/j.bone.2014.06.038
DO - 10.1016/j.bone.2014.06.038
M3 - Article
C2 - 25014885
AN - SCOPUS:84904464013
VL - 67
SP - 71
EP - 80
JO - Bone
JF - Bone
SN - 8756-3282
ER -