D. Rick Sumner, PhD, has taught gross anatomy in medical and dental schools and has more than 30 years of NIH funding as a principal investigator on research, training and instrumentation grants. Sumner currently is the past-president of the American Association for Anatomy, a past-president of the Orthopaedic Research Society, a past-president of the International Society for Bone Morphometry, and president of the Association of Anatomy, Cell Biology and Neurobiology Chairpersons. His research interests focus mainly on bone regeneration as related to orthopedic implants, understanding how matrix maturation contributes to bone quality, and the role of bone in osteoarthritis. He has expertise in small animal models, dynamic and static histomorphometry, scanning electron microscopy, micro computed tomography, and mechanical testing.