As we get older, our bones thin and our bone strength decreases. Osteoporosis is a disease in which bones become very weak and more likely to break. It often develops unnoticed over many years, with no symptoms or discomfort until a bone break. Fractures caused by osteoporosis most often occur in the spine. These spinal fractures — called vertebral compression fractures — occur in nearly 700,000 patients each year. They are almost twice as common as other fractures typically linked to osteoporosis, such as broken hips and wrists. Not all vertebral compression fractures are due to osteoporosis. But when the disease is involved, a fracture is often a patient's first sign of a weakened skeleton from osteoporosis. To learn more about osteoporosis: Osteoporosis.