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Effect of long‐term administration of fluoride on plasma fluoride and calcium in relation to forming enamel and dentin in rats
Author(s) -
FEJERSKOV O.,
LARSEN M. JOOST,
JOSEPHSEN K.,
THYLSTRUP A.
Publication year - 1979
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1979.tb00660.x
Subject(s) - fluoride , dentin , enamel paint , calcium , mineralization (soil science) , chemistry , dentistry , radiodensity , incisor , endocrinology , medicine , nuclear chemistry , inorganic chemistry , surgery , organic chemistry , radiography , nitrogen
— Three groups of 1‐month‐old rats were kept on water containing 0.2, 56.5 and 113 parts/10 6 F‐, respectively, for a period of 2 months. These groups were set up in order to study the relationship between long‐term administration of high doses of waterborne fluoride, plasma values of fluoride and calcium and changes in forming dentin and enamel of the rat incisor. The microradiographic study revealed that increased levels of fluoride caused a delay in mineralization of the enamel. In the 113 parts/10 6 group the radiolucent areas in the enamel exhibited a distinct periodicity along the tooth, a phenomenon which cannot at present be explained. In the dentin the fluoride interfered with the process of mineralization giving rise to radiolucent and radiopaque banding in the experimental groups. With increasing levels of fluoride in the water supply a significant increase in plasma fluoride was recorded. In contrast the serum calcium values in both experimental groups were reduced to the same extent, which differed significantly from that of the control group. It is concluded that the fluoride doses which are needed to create fluorotic changes in rats may interfere with calcium metabolism and basic mineralization processes.