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- John_Ross_Callahan abstract "Dr. John R. Callahan (1853 – February 12, 1918) was a pioneer in the field of dentistry and particularly dental research in the late 19th and early 20th centuries.Born in Hillsboro, Ohio in 1853, Callahan received his dental degree from the Philadelphia Dental College in 1877. He practiced dentistry in San Francisco for two years before returning to Hillsboro where he practiced until 1890. He then moved to Cincinnati, Ohio joining the practice of Dr. C. R. Taft.In 1884 he was selected Secretary of the Ohio State Dental Society and served until 1890. In 1892 he was elected President of the Society and was a member of the Board of Directors from 1894-1918. He served as President of the Cincinnati Dental Society 1906-1907.His major research was in diseases of the dental pulp. He also contributed papers on materials and methods for filling root canals; notably, chloro-percha. His original contribution of the use of sulfuric acid for opening root canals was significant at the time as were his investigations on dental materials and patient management problems.Callahan was a member of the Institute on Dental Research of the National Dental Association. The Jarvie Fellowship Medal was awarded to him in 1917. He died on February 12, 1918.".
- John_Ross_Callahan award National_Dental_Association.
- John_Ross_Callahan birthDate "1853".
- John_Ross_Callahan birthPlace Hillsboro,_Ohio.
- John_Ross_Callahan birthPlace Ohio.
- John_Ross_Callahan birthPlace United_States.
- John_Ross_Callahan birthYear "1853".
- John_Ross_Callahan citizenship United_States.
- John_Ross_Callahan deathDate "1918-01-12".
- John_Ross_Callahan deathYear "1918".
- John_Ross_Callahan field Dentistry.
- John_Ross_Callahan thumbnail JRCallahan2.jpg?width=300.
- John_Ross_Callahan wikiPageID "22632889".
- John_Ross_Callahan wikiPageRevisionID "471768795".
- John_Ross_Callahan awards "Jarvie Fellowship Medal".
- John_Ross_Callahan awards "Member of the Institute on Dental Research of the National Dental Association".
- John_Ross_Callahan birthPlace Hillsboro,_Ohio.
- John_Ross_Callahan birthPlace Ohio.
- John_Ross_Callahan birthPlace United_States.
- John_Ross_Callahan citizenship United_States.
- John_Ross_Callahan dateOfBirth "1853".
- John_Ross_Callahan dateOfDeath "1918-01-12".
- John_Ross_Callahan deathDate ", aged c.65".
- John_Ross_Callahan fields "Dentistry, dental research".
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- John_Ross_Callahan imageSize "250".
- John_Ross_Callahan knownFor "Research into diseases of dental pulp, methods for filling root canals.".
- John_Ross_Callahan name "Callahan, John R.".
- John_Ross_Callahan name "John R. Callahan".
- John_Ross_Callahan placeOfBirth Hillsboro,_Ohio.
- John_Ross_Callahan placeOfBirth Ohio.
- John_Ross_Callahan placeOfBirth United_States.
- John_Ross_Callahan shortDescription "American dentist, dental researcher".
- John_Ross_Callahan description "American dentist, dental researcher".
- John_Ross_Callahan description "Americandentist, dental researcher".
- John_Ross_Callahan subject Category:1853_births.
- John_Ross_Callahan subject Category:1918_deaths.
- John_Ross_Callahan subject Category:American_dentists.
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- John_Ross_Callahan comment "Dr. John R. Callahan (1853 – February 12, 1918) was a pioneer in the field of dentistry and particularly dental research in the late 19th and early 20th centuries.Born in Hillsboro, Ohio in 1853, Callahan received his dental degree from the Philadelphia Dental College in 1877. He practiced dentistry in San Francisco for two years before returning to Hillsboro where he practiced until 1890. He then moved to Cincinnati, Ohio joining the practice of Dr. C. R.".
- John_Ross_Callahan label "John Ross Callahan".
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- John_Ross_Callahan depiction JRCallahan2.jpg.
- John_Ross_Callahan givenName "John R.".
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- John_Ross_Callahan name "Callahan, John R.".
- John_Ross_Callahan name "John R. Callahan".
- John_Ross_Callahan surname "Callahan".