Oragenics, Tampa, FL, has appointed Martin Handfield vice president of research and Robert Zahradnik vice president of operations. Dr. Handfield joined Oragenics in 2009 as the director of research and development. He has previously conducted research alongside Oragenics founder, Dr. Jeff Hillman. Dr. Zahradnik, one of the co-founders of Oragenics, has served in several senior capacities for the company. He has held a variety of senior level positions in the healthcare arena and is currently working on expanding Oragenics’ patented blend of probiotics, ProBiora3, for oral care.