Following his Naval career he attended the University of Minnesota and received his Doctor of Dental Surgery degree in 1959.
He pursued a post doctorate two-year course in orthodontics at the University of Minnesota, which he completed in 1962. He then announced his limited practice to the specialty of orthodontics in January of 1963.
As of this writing, Dr. Longworth is South Dakota's only orthodontist listed as a premier Invisalign provider.
David Longworth the Author
Dr. Longworth has also found time to write 2 books while maintaining his thriving orthodontist practice. You can find more inforamtion about his books on their websites.