- Immediate decontamination proved to be crucial to limit fluoride absorption.
- All decontamination strategies and water alone reduced dermal fluoride absorption.
- Buffer capacity may account for efficiency differences between decontaminants.
The fluoride ions of the industrially largely irreplaceable, locally corrosive hydrofluoric acid (HF) can scavenge cations in biological tissues, which explains their high toxic potential, and also leads to local acidification through proton release. The influence of three complexing agents, calcium (Ca2+) gluconate (as 2.5% Ca2+gel and individually (2.84%) or commercially (10%) formulated Ca2+solution), magnesium (Mg2+) gluconate (2.84%) solution and aluminium (Al3+) solution (Hexafluorine®, pure and diluted) on the absorption of fluoride following HF exposure (1–3 min, 100 ul, 30%/0.64 cm2) through human skin was investigated in an ex-vivo diffusion cell model. Fluoride absorption was assessed over 6–24 h and analysed with a fluoride electrode. Decreasing the contamination time reduced the fluoride absorption distinctly which was further reduced by the application of fluoride-binding decontamination agents (Ca2+, Mg2+, Al3+) or water alone without being significantly different. Ca2+ appeared slightly more effective than Mg2+ in reducing fluoride absorption. Moreover, the addition of pH adjusting buffer promoted the decontamination efficacy. Fluoride-binding agents can facilitate the decontamination of dermal HF exposure. However, prompt decontamination appeared to be the key to successful limitation of fluoride absorption and pushes the choice of decontamination agent almost into the background.
*Original abstract online at https://www.sciencedirect.com/science/article/abs/pii/S088723332030607X
Allergy in horses from artificially fluoridated water
As described recently in Fluoride, horses on artificially fluoridated water (AFW) developed chronic fluoride poisoning. This report describes an allergic manifestation as an addition to the classical signs of fluorosis, viz., urticaria. The skin lesions disappeared promptly when an affected horse was removed from AFW and returned promptly when the
Fluoride toothpaste: a cause of acne-like eruptions
I feel that I should share with my colleagues in dermatology an observation relative to the treatment of problem acne. All of us have the adult female acne patient who has closed comedonal or papular acne extending from the corner of the mouth to the chin area, sometimes in a
Contact urticaria from sodium fluoride
Sodium fluoride (NaF) is. used for the treatment and prevention of dental caries. Its application to the teeth makes the dental enamel more resistant to acid. In some communities, it is added to the water if the geographical area lacks sufficient fluoride. Another method of preventing dental caries is the
[Hydrofluoric acid injury analysis on the health of workers].
Objective: To analyze the damage caused by hydrofluoric acid to the health of operating workers and to explore health monitoring indicators. Method: Occupational health examinations were carried out on 536 hydrofluoric acid operating workers from the etching process at a certain factory, and 256 persons in the control group. Results: Among the
Papulonodular eruptions from certain bromide and iodide preparations are widely recognized entities, but skin lesions following fluoride ingestion are rare. Modern prophylaxis for postirradiation dental caries includes the use of fluoride gel preparations applied to the teeth. In two patients receiving such therapy a papulonodular eruption developed, similar to the
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