Walaa Fikry Elbossaty
All vital process in human life as walking, jumping, working, and enjoy with good life apply healthy bone. The normal bone formation required significant amount of some minerals as calcium and phosphorous, also vitamin D which play important role in movement of calcium in to bone which responsible for bone healthy. There are different causes include life style, genetics, hormonal, and insufficient amount take from calcium and vitamin D which responsible for defect in bone formation process, and appear abnormal bone structure. The most bone diseases are osteoporosis, and osteomalacia in this work we discuss the definition, causes sign, diagnosis, pathophysiology, and treatment of both osteoporosis, and osteomalacia.