- See: Essentials in Osteodynamics" - bone remodeling functions reshaping or replacement of of bone during growth and following injury;- in the first year of life, almost 100% of the skeleton is replaced;- in adults, remodeling procedes at about 10% per year;- bone responds to functional demands and muscle attachments;- w/ remodeling, bone will be added where needed and removed where it is not required;- bone remodeling begins w/ bone resorption , followed by subsequent by bone formation;- remodeling process occurs w/ a specific sequence of events termed the Bone multicellular unit (BMU);- sequence of events;- remodeling may begin w/ parathyroid hormone induced resorption; osteoclastics resorb bone removing both organic and inorganic components are removed;- subsequently, new bone by osteoblasts , replacing bone that was resorbed;- described by Julius Wolff in 1868.- law holds that every change in the form or function of a bone is followed by adaptive changes in its internal architecture and its external shape