W. J. Younger

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William John Younger (1838-1920) was an American dentist who performed some of the earliest and most groundbreaking research in the field of periodontology.^[1]

Work in the field of periodontology

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Younger was a follower of John W. Riggs, the first American periodontist. In 1893, he was the first to consider periodontal disease an infection^[2] and was the first to discuss the possibility of "periodontal reattachment," a process in which gingival graft tissue could be removed from one site in the mouth and properly reattached to the alveolar bone.

in 1902, Younger reported the first gingival graft, in which he removed tissue "from behind the third molar" and reattached it near the canine tooth, claiming the surgery to have been a success.^[3] In the same report he first described the use of a membrane for periodontal regeneration.

Younger practiced for some time in San Francisco, California.^[4]

References

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^ Shklar, G; Carranza, FA: The Historical Background of Periodontology. In Newman, MG; Takei, HH; Carrana FA, editors: Carranza’s Clinical Periodontology, 9th Edition. Philadelphia: W.B. Saunders Company, 2002. page 7.
^ "Oral Surgery and Crown Lengthening". santaclaritacosmeticdentist.net. Retrieved April 17, 2014.
^ American Dental Club of Paris: Meetings of December 1902 and January and March 1903. Dent Cosmos 1904; 46:39.
^ The New York Times A SAN FRANCISCO DENTIST'S CHARGES, July 7, 1887

Dentistry involving supporting structures of teeth (Periodontology)

Anatomy

Disease

Diagnoses	Chronic periodontitis Localized aggressive periodontitis Generalized aggressive periodontitis Periodontitis as a manifestation of systemic disease Periodontosis Necrotizing periodontal diseases Abscesses of the periodontium Combined periodontic-endodontic lesions
Infection	A. actinomycetemcomitans Capnocytophaga sp. F. nucleatum P. gingivalis P. intermedia T. forsythia T. denticola Red complex Entamoeba gingivalis (amoebic) Trichomonas tenax
Other	Calculus Clinical attachment loss Edentulism Fremitus Furcation defect Gingival enlargement Gingival pocket Gingival recession Gingivitis Horizontal bony defect Linear gingival erythema Occlusal trauma Periodontal pocket Periodontal disease Periodontitis Plaque Vertical bony defect
Treatment and prevention	Periodontal examination Ante's law Brushing Bleeding on probing Chlorhexidine gluconate Flossing Hydrogen peroxide Mouthwash Oral hygiene Tetracycline Triclosan Host modulatory therapy

Treatment

Conventional therapy

Surgery

Important personalities

Other specialties

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