An experimentally validated finite element method for augmented vertebral bodies

摘要: Background Finite element models of augmented vertebral bodies require a realistic modelling the cement infiltrated region. Most methods published so far used idealized shapes or oversimplified material for In this study, an improved, anatomy-specific, homogenized finite method was developed and validated to predict apparent as well local mechanical behavior bodies. Methods Forty-nine human body sections were prepared by removing cortical endplates scanned with high-resolution peripheral quantitative CT before after injection standard low-modulus bone cement. Forty-one specimens tested in compression measure stiffness, strength contact pressure distributions between loading-plates. From remaining eight, fourteen cylindrical extracted from region obtain properties. Anatomy-specific generated data. The featured element-specific, density-fabric-based properties, damage accumulation, real experimentally determined properties Apparent stiffness at loading plates compared simulations experiments. Findings The able (R2 > 0.86) 0.92) very well. Also, numerically obtained reasonable 0.48) qualitative agreement experiments. Interpretation The proposed have proven be accurate tool studying bodies.