Fluoride concentrations in 42 urinary calculi were determined using a microdiffusion procedure in conjunction with a fluoride sensitive electrode. Mean values of 56, 230 and 1112 ng./mg. fluoride were obtained for uric acid, calcium oxalate monohydrate and apatite/struvite stones, respectively. Fluoride concentration was found to be related to calcium oxalate dihydrate levels as well as to apatite content. It is suggested that the former has zeolithic properties which might trap fluoride while formation and growth of the latter appears to be enhanced by elevated urinary fluoride levels.
The relationships between low levels of urine fluoride on children’s intelligence, dental fluorosis in endemic fluorosis areas in Hulunbuir, Inner Mongolia, China.
There has been public concern about children's intellectual performance at high levels of fluoride exposure, but few studies provide data directly to the question of whether low fluoride exposure levels less than 3.0 mg/L in drinking water adversely associated with children's intelligence. In this survey, we investigated the effects of
Industrial Fluorosis of Farm Animals in England, Attributable to the Manufacture of Bricks, the Calcining of Ironstone, and to Enamelling Processes.
Front Page of Article IN the summer of 1938 one of us (F. B.) was called in by veterinary practitioners to advise on the possible causation of a "mysterious lameness of cattle" near Stewartby, in Bedfordshire. Clinical examination and proximity to a large concentration of brick kilns suggested " industrial fluorosis"
Thyroid function, intelligence, and low-moderate fluoride exposure among Chinese school-age children.
Highlights Low-moderate fluoride was related to alterations in childhood thyroid function. Fluoride exposure was associated with a decrease in children’s intelligence. TT3, FT3 were positively related to the odds of developing high normal intelligence. TSH may modify the association of fluoride with children’s intelligence. Background: Thyroid hormones (THs) are critical for
Gastrointestinal Absorption and Renal Excretion of Fluoride After Ingestion of a High-Fluoride Dentifrice.
This study aimed to evaluate the gastrointestinal absorption and renal excretion of fluoride after the ingestion of high-fluoride dentifrice. Twelve volunteers participated in this in vivo, crossover, and blinded study. In three experimental phases, the volunteers were randomly assigned to one of three treatment groups, who ingested either the following:
Excess fluoride ingestion and thyroid hormone derangements in children living in Delhi, India
SUMMARY: Ninety children with dental fluorosis, aged 7–18, living in fluoride endemic, non-iodine deficient areas of the National Capital Territory of Delhi, India, where iodized salt has been promoted for over a decade, were investigated, along with 21 children in two control groups without dental fluorosis living in non- endemic
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