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Developmental dental aberrations after the dioxin accident in Seveso
Satu Alaluusua1, Pier Calderara, Pier Mario Gerthoux
1Department of Pedodontics and Orthodontics, Institute of Dentistry, University of Helsinki, Helsinki, Finland. satu.alaluusua@helsinki.fi
Environmental Health Perspectives
|September 4, 2004
Summary
Childhood exposure to dioxins, specifically 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), is linked to developmental dental defects like enamel abnormalities and hypodontia in children. These findings suggest dioxins can disrupt human organogenesis during tooth development.
Area of Science:
- Environmental Health
- Toxicology
- Developmental Biology
Background:
- Developing teeth are sensitive targets for dioxin toxicity.
- The Seveso dioxin accident provides a unique opportunity to study long-term health effects.
Purpose of the Study:
- To investigate dental and oral aberrations in individuals exposed to dioxins in childhood.
- To assess the association between serum dioxin levels and dental abnormalities.
Main Methods:
- Study included 48 subjects from dioxin-contaminated zones (ABR) and 65 controls (non-ABR).
- Subjects were exposed in childhood and frequency-matched for age, sex, and education.
- Dental examinations focused on developmental defects, hypodontia, caries, and periodontal disease.
Main Results:
- 93% of developmental enamel defects occurred in subjects < 5 years old at the time of exposure.
- Prevalence of enamel defects was higher in the exposed group (42%) vs. controls (26%), correlating with serum TCDD levels (p=0.016).
- Hypodontia was also more prevalent in the exposed group (12.5%) vs. controls (4.6%), correlating with TCDD levels (p=0.05).
Conclusions:
- Childhood exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is associated with developmental dental aberrations.
- Dioxins appear to interfere with human tooth organogenesis.
- Infectious dental conditions like caries and periodontal disease were not linked to dioxin exposure.