Dr. Hanratty is a former Assistant Clinical Instructor at Tufts University.He currently is a visiting lecturer in Periodontology and Implantology at Tufts University and Harvard University. He is past president of North Shore District Dental Society and has lectured throughout the USA and Europe on Periodontology and Implantology. He has written a chapter in the textbook: Periodontal Therapy, Clinical Approaches and Evidence of Success.