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Acidic Medium Effect on the Natural Frequency of Bones

Ameen M Al Juboori and Shaker Sakran Hassan

This study focus on the simulation of calcium efflux and its effects on the natural frequency of the bone. The calcium was removed from the bone by the aid of diluted sulfuric acid (20-30% concentration and pH 1). Sulfuric acid will act as reducing agent. The reaction between the bone and the acid will results Calcium sulfate and hydrogen. Ten cows bone samples were collected from different animals. Those bones was submerged in the diluted acid formula for 24 hrs. CT Scan for the bones was performed before and after the treatment. Finite Element analysis was conducted based upon the DICOM imaged obtained from the CT Scan. The Finite element analysis results was compared with experimental results obtained by conducting impulse test for the bones before and after the treatment. There was good agreements between the results in both cases. The results shows that the natural frequency of the treated bone is higher than the fresh bone. This can be related to the mass lost due to the chemical reaction. This study can give us an information about the relationship between the loose of inorganic elements in the bone matrix and the natural frequency of the bone.