Kool Smiles Dental Leadership


Clinical Quality and Operations Leadership

David Vieth, DDS, Executive Dental Officer

Dr. David Vieth received his Bachelor of Science from Bowling Green State University and his Doctor of Dental Surgery degree from Ohio State University Dental School. Following graduation from dental school, Dr. Vieth started a multi-specialty group dental practice serving Buffalo, New York, and its surrounding communities. The group practice expanded over the years and employed more than 150 people in four locations, including 27 doctors and an integrated crown and bridge lab.

Dr. Vieth sold his thriving practice in 2006 to pursue other interests. While considering his next career move, he became increasingly interested in the opportunity to answer the American Dental Association´s rallying cry to increase access to dental care for the underserved. He joined Kool Smiles in 2007 to achieve that mission.

Dr. Vieth has more than 30 years of experience in all areas of dentistry. He spent a great deal of that time in cosmetic areas, restoring implants and completing extensive crown and bridge cases.

Dr. Vieth is a standing member of the American Dental Association and the American Academy of Pediatric Dentistry. He has served as member and officer of various civic organizations, most notably as an officer of the Williamsville Rotary Foundation, a foundation established by the Williamsville Rotary Club in Buffalo, of which he was a member for 25 years.

Dale Mayfield, DMD, Executive Dental Officer

Dr. Dale Mayfield received his undergraduate degree in exercise physiology from Brigham Young University and his Doctor of Dental Medicine degree from the Medical College of Georgia. He spent 10 years in private practice in Decatur, Georgia, gaining extensive experience in all aspects of dentistry, including implants, complex crown and bridge cases, CEREC, and endodontics.

With this experience, Dr. Mayfield decided to commit his expertise to providing quality dental care for the underserved by joining Kool Smiles in 2006 as an Executive Dental Officer. Dr. Mayfield is a member of the American Dental Association, the American Academy of Pediatric Dentistry, and the Northern District Dental Society. He is also an avid fly fisher, an outdoorsman, and an active member of his church community. He lives in Georgia with his wife and four children.

Tu Tran, DDS, Founding Dentist

Dr. Tran is a Founding Dentist and owner of Kool Smiles, P.C. Dr. Tran was formerly Lead Dentist at Smile High, General Dentistry for Children in Denver, Colorado. Before that, Dr. Tran worked at Perfect Teeth of Denver, Colorado.

Dr. Tran received his undergraduate degree in biology and chemistry from the University of Denver and his Doctor of Dental Surgery degree from the University of Colorado. Dr. Tran is a member of the American Dental Association, the Colorado Dental Association, and the Georgia Dental Association.


Clinical Quality and Audit Leadership

Paul O. Walker, DDS, Vice President, Clinical Quality

Dr. Paul O. Walker is a board-certified pediatric dentist. He received his Doctor of Dental Surgery degree from Northwestern University and his Master of Science degree, along with his specialty training, from Indiana University. He served as a dental officer in the U.S. Navy from 1966 to 1968 and also served as the Lead Pediatric Dentist for Health Partners.

Dr. Walker was the director of the Advanced Education Program in Pediatric Dentistry and the director of the Hospital Dental Clinic at the University of Minnesota from 1972 to 1994. He went on to serve as the Associate Dean for Clinical Services and Professor at the Baylor College of Dentistry at Texas A&M University from 1994 to 1998.

Dr. Walker is a fellow of the American College of Dentists and the International College of Dentists, as well as the American Academy of Pediatric Dentistry. He has served on the Board of Trustees for the American Academy of Pediatric Dentistry and as President and Director/Examiner for the American Board of Pediatric Dentistry. Currently, he was a member of the Pediatric Dentistry Review Committee for the Commission on Dental Accreditation and a scientific article reviewer for Practical Reviews in Pediatric Dentistry. He was appointed by the governor to the Minnesota Board of Dentistry and the Dental Services Advisory Committee.

Dr. Walker retired from full-time practice and teaching in 2000, but continues to work as an independent pediatric dentistry consultant.

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