Strain distribution in the proximal Human femur during in vitro simulated sideways fall

摘要: Abstract This study assessed: (i) how the magnitude and direction of principal strains vary for different sideways fall loading directions; (ii) a differ from physiological (iii) fracture mechanism during fall. Eleven human femurs were instrumented with 16 triaxial strain gauges each. The non-destructively subjected to: (a) six configurations covering range (b) 12 simulating falls. eventually fractured in configuration while high-speed cameras recorded event. When same force was applied, significantly larger than directions (principal compressive 70% fall). Also compressive-to-tensile ratio different: largest only 30% tensile strain; but fall, twice as large strains. Principal nearly perpendicular to loading. In most critical regions (medial part head−neck) varied by less 9° between conditions, whereas it up 17° conditions. associated specific where failure initiated on superior-lateral side (compression) followed later medially (tension), often exhibiting two-peak force−displacement curve.