Equine dental and skeletal fluorosis induced by well water consumption.

The research investigates a case where two horses showed signs of long-term fluoride toxicity, affecting their teeth and skeletal system, from consuming well water containing elevated fluoride levels. Later examinations of the horses, who were euthanized due to the condition, confirmed the presence of this fluoride toxicity.

Overview of the Research

• The research centers on two horses that were diagnosed with chronic dental and skeletal fluorosis, a condition caused by the consumption of high levels of fluoride over a long period.
• Initial observations were of multiple joint degenerative disease and several tooth abnormalities in both horses.
• The water from the well the horses were drinking from, as well as their food, presented unusually high fluoride concentrations.

Findings and Observations

• In-depth examinations were conducted on both horses after they were euthanized, which involved studying bone and tooth samples.
• The examinations revealed increased concentrations of fluoride in both the bone and tooth samples of the horses.
• Microscopically, there were visible abnormalities in the examined samples. These primarily consisted of foci of cement necrosis (death of cells in the cementum, the calcified layer that covers the root of a tooth) and hypercementosis (excessive formation of the cementum).

Conclusions and Recommendations

• Interestingly, the dental and skeletal lesions found in the horses were bilateral and highly symmetric, which was considered unusual.
• The horses also had chronic lameness, which further pointed towards a possible case of fluoride toxicosis.
• In conclusion, the study suggests that similar cases that present highly symmetrical dental or skeletal lesions along with chronic lameness, should be evaluated for potential fluoride toxicosis.