Bones Are Constantly Remodeled

Bone is living tissue that the body continually remodels. Osteoclasts break down old tissue, osteoblasts form new tissue, and osteocytes help coordinate the process. It is often said that almost the entire adult skeleton is remodeled about every ten years; this is a rough average, not a synchronized replacement of every bone. Rates differ among skeletal regions and change with age, hormones, loading, and health.