Dr. Sanford A. Barber Dr. Sanford A. Barber has been in practice in Rockville, Md. for over 30 years. He is a graduate of the University of Pennsylvania School of Dental Medicine. After 2 years in the U. S. Air Force Dental Corps, he returned to the University of Maryland for his speciality training in Periodontics. He is a former Associate Clinical Professor and past vice president of the Metropolitan Washington Society of Periodontics. From Right to Left: Sandra Rehder, B.A., Practice Administrator, is a graduate of Elon College, and has over 25 years experience in the dental profession with the last 15 here at Randolph Hills Periodontics. Sarah Zeghani, Dental Assistant received her training at Montgomery College and the Southern Maryland Dental Society. Andrea Siegel RDH, is a graduate of the University of Pennsylvania School of Dental Hygiene and has over 10 years experience here in treating Periodontal and Implant patients.