O Walter Donnenfeld1, Harold R Stanley2, Lester Bagdonoff3. 1. Professor and Chairman, Division of Periodontology, University of Florida College of Dentistry, Gainesville, Florida. 2. Professor and Chairman, Department of Oral Medicine, University of Florida College of Dentistry, Gainesville, Florida. 3. Dental Resident, Sunland Training Center, Gainesville, Florida.