Neurophysiological and neuropsychological function in mercury-exposed dentists

Area of Science:

• Occupational health
• Toxicology
• Neurology

Background:

• Mercury exposure is a concern in dental professions.
• Chronic health impairments can result from cumulative toxin exposure.

Purpose of the Study:

• To investigate the relationship between cumulative mercury exposure and chronic health issues in dentists.
• To compare neurological and electrodiagnostic findings between high-mercury and control groups.

Main Methods:

• Measured mercury levels in 298 dentists using X-ray fluorescence.
• Compared electrodiagnostic and neuropsychological results of high-mercury ( > 20 µg/g tissue) dentists with a control group.
• Assessed for polyneuropathies and visuographic dysfunction.

Main Results:

• 30% of high-mercury dentists had polyneuropathies; none in the control group.
• High-mercury group exhibited mild visuographic dysfunction.
• Increased symptom-distress reported in the high-mercury group compared to controls.

Conclusions:

• Cumulative mercury exposure is linked to chronic health impairments in dentists.
• Mercury used in dental restorative materials presents a significant occupational health risk.
• Further research into mercury's long-term neurological effects is warranted.