t Clinical manifestation and types Primary osteoporosis Type I postmenopausal osteoroposis--This is seen with estrogen deficiency. There is high bone turnover rate. The proportion of trochanteric and femoral neck fractures increases w Type ll elderly osteoroposis--This is aging in bone physiology The compression fracture of the spine and hip fracture are more commonClinical manifestation and types Primary osteoporosis ：  TypeⅠpostmenopausal osteoroposis——This is seen with estrogen deficiency. There is high bone turnover rate. The proportion of trochanteric and femoral neck fractures increases；  TypeⅡelderly osteoroposis——This is aging in bone physiology. The compression fracture of the spine and hip fracture are more common