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Periodontal Effect of Nonfunction in Monkeys
Author(s) -
Pihlstrom Bruce L.,
Ramfjord Sigurd P.
Publication year - 1971
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1902/jop.1971.42.12.748
Subject(s) - periodontology , citation , library science , medicine , dentistry , computer science
A L T H O U G H T H E PERIODONTAL EFFECTS of nonfunction have been studied extensively, the histologic and clinical significance of nonfunction remains unclear. Studies of humans and animals 5 2 0 indicate that nonfunction leads to narrowing of the periodontal membrane and loss of functional orientation of the principle fibers. In humans , 9, 12, 2 1 and monkeys' 2 2 an increase in thickness of cementum has been reported associated with nonfunction. The supporting bone of nonfunctional teeth in humans' ' 5 , 1 1 , 2 3 and rats 1 7 , 2 4 exhibits increased size of marrow spaces and thin trabeculae. There is evidence of crestal apposition of bone adjacent to supra-erupted nonfunctional teeth both in humans and monkeys. Both crestal apposition' and resorption' 1 7 ' 2 4 have been reported with nonfunction in rodents. Increased calculus retention on nonfunctional teeth has been observed in humans. The periodontal status in animals varied from minimal inflammation,' pocket depth,' 2 0 and recession,' 2 6 to varying degrees of ulceration and inflammation, increased pocket depth, and recession. No difference in the degree of inflammation between functional and nonfunctional teeth was observed in monkeys.