Biomechanical modeling of proximal femur : development of finite element models to simulate fractures

摘要: Hip fracture is a significant problem in health care incurring major costs to society. Therefore, it necessary study mechanisms and develop improved methods estimate individual risk. In addition conventional bone density measurements, computational finite element (FE) analysis has been recognized as valuable method for studying biomechanical characteristics of hip fracture. this study, computed tomography (CT) based were investigated simulation models developed experimental femoral load type sideways fall loading configuration. Cadaver femur specimens (age 55–100 years) scanned using CT scanner dual-energy X-ray absorptiometry (DXA), the femurs mechanically tested failure images used generating FE model, DXA was reference method. done proximal configuration experimentally measured type. Statistical analyses compare data. Cervical trochanteric fractures displayed characteristic strain patterns when model mainly driven by geometry. This relatively simple estimation provided reasonable agreement occurrence Accurate assessment between (r2 = 0.87) achieved subjectspecific modeling, including material properties trabecular bilinear elastoplastic models. Nevertheless, also showed that can be estimated with accuracy 0.73) only cortical bone. The more predictive than slightly less accurate subject-specific model. short calculation time suggest promise terms effective clinical use.