History Demko Orthodontics began in 1975 with Dr. Richard Demko in Washington Missouri and after running his practice solo for nearly 30 years, Dr. Jacqueline Demko joined the practice in 2000. Dr. Jackie has continued the growth of the business and now Demko Orthodontics specializes in orthodontics and dentofacial orthopedics for children and adults in Chesterfield, Saint Charles, and the original Washington Missouri location. BIO Dr. Jacqueline A. Demko is also a native of St. Louis. She attended Ascension Grammar School and St. Joseph's Academy High School. Dr. Jackie received her B.S. from St. Mary's College, her D.D.S. from the University of Missouri, Kansas City, and her M.S.D. in Orthodontics from St. Louis University.