Evaluation the Sensitivity of Bone Natural Frequency as a Diagnosis Tool to Identify Bones Integrity

Abstract

This study explain the reason behind the low sensitivity of the natural frequency for the changes in bone health. The mechanical properties of the bone were reduced by placing the bone in boiling water for 2 hours and the mass of the bone was reduced by placing the bone in diluted acidic medium for 24 hours. The natural frequency of the bone samples (10 samples) was calculated in three cases (fresh, after boiling, and after acidic treatment). The natural frequency was calculated theoretically by using finite element analysis based upon CT-Scan DICOME images and experimentally by using impulse test. The difference between the results in the two methods was less than 15%. The boiling process caused a reduction in the natural frequency while the acidic treatment caused an increase in the natural frequency compared with the natural frequency of the fresh condition. The mutual influence of these two component cannot be separated. This mutual influence will reduce the sensitivity of the natural frequency as diagnosis factor for the changes in the health condition of the bone.