He earned his D.D.S. from Loyola University of Chicago, and his M.S. from the Univeristy of Texas at San Antonio. He graduated from the USAF Periodontics Residency at Wilford Hall Medical Center in 1985. In 1990, he became a Diplomate of the American Board of Periodontology. Following a 24 year career on active duty with the United States Air Force Dental Corps, Dr. Parrish joined the faculty of the School of Dentistry in 2001. His main research interests presently include periodontal prognosis, quantification of gingival crevicular fluid and tooth regeneration issues. Phone: (402) 280-5085