骨质疏松症(Osteoporosis ,OP)是机体自然衰退、老化过程的组成部分,是系统性骨骼疾病。更是一种因骨量降低骨组织显微结构发生变化,导致骨力学强度下降,骨折危险性增加的疾病。随着人口老年化,OP发病率不断增加,据2 0 0 0年资料美国约有14 0 0～2 5 0 0万人患OP ,其中OP骨折者 Osteoporosis (OP) is an integral part of the body’s natural decline and aging process and is a systemic bone disease. It is a kind of disease which reduces the bone microstructure due to the decrease of the bone mass, which leads to the decrease of the strength of the bone mechanics and the increase of the fracture risk. With the aging of the population, the incidence of OP continues to increase. According to the data of 2000, there are about 140 to 250 million people in the United States suffering from OP, of which patients with OP fractures