The osteoporosis is a common symptom which comes after human middle-age .The article that using two different way to research on ossein outflow, and it makes the influences of mechanics behavior.

• 中文摘要骨质疏松症已成为人类步入中年后常见的症状，本文将以二种不同的方式研究骨质流失时对力学行为的影响。