Early Life and Education:
- Harold Kesling was born in Cass County, Indiana in 1901.
- He graduated from Loyola University Chicago in 1923 with a dental degree.

Orthodontic Career:
- Harold Kesling opened a private practice in La Porte, Indiana.
- In 1929, he opened an orthodontic practice in Hammond, Indiana.
- He developed the Positioner appliance during his work in the La Porte office.
- His technique attracted many orthodontists to his practice.
- He was influenced by Raymond Begg and his light wire technique.
- After learning about the Begg technique in Australia, he switched to using it in his treatment.
- Harold Kesling gave seminars and lectures on the Begg technique for 40 years.

Contributions to Orthodontics:
- Harold Kesling developed the Tip Edge appliance.
- He also developed the Positioner appliance.
- He was known for his diagnostic setup with consideration of the third dimension.

Awards and Positions:
- Harold Kesling was an Honorary President of the North American Begg Society of Orthodontists.

References:
- Wells, Neal E. (October 1, 1970). "Application of the positioner appliance in orthodontic treatment."
- Kesling, Harold D. (October 1, 1956). "The diagnostic setup with consideration of the third dimension."
- Harold D. Kesling (1901–1979). American Journal of Orthodontics. 77 (5): 574–575. May 1, 1980.
- Orthodontist Care. Retrieved September 15, 2015.

Harold Kesling (Wikipedia)

Harold Dean Kesling (April 8, 1901 – 1979) was an American orthodontist who is known for developing the tooth positioning appliance called "Positioner". This appliance is used in orthodontics at the end of treatment to allow teeth to settle in occlusion.

Harold Dean Kesling
Born(1901-04-08)April 8, 1901
EducationLoyola University Dental School
Known forDeveloped Positioner Appliance, Founding member of Orthodontic Company TP Orthodontics
Medical career
ProfessionDentist
Sub-specialtiesorthodontics

In 1945, H.D. 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." The history of clear aligner therapy began when H.D. Kesling pioneered the concept of straightening teeth without braces with the invention of the "Positioner."

H.D. Kesling founded orthodontic company TP Orthodontics, Inc. in 1959.

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