Harold Dean Kesling (April 8, 1901 – 1979) was an American orthodontist who is known for developing the tooth positioning appliance called "Positioner".
Kesling stated that “Major tooth movements could be accomplished with a series of Positioners by changing the teeth on the setup slightly as treatment progresses."
Kesling pioneered the concept of straightening teeth without braces with the invention of the "Positioner.
His developed technique attracted many other orthodontists to his practice and Kesling gave many seminars in 1950s regarding this appliance.
[4] Kesling was influenced by the work of Raymond Begg and his light wire technique.