by Katherine Unger Baillie, University of Pennsylvania Shuying (Sheri) Yang. Credit: University of Pennsylvania Bone remodeling in the body involves a balancing act between osteoblasts, cells that build bone, and osteoclasts, cells that break it down. Diseases such as osteoporosis, arthritis, and periodontitis involve bone loss, and are linked with an overabundance of osteoclast activity....