Secondhand Smoke Affects Tooth Enamel in Rats

Exposure to secondhand cigarette smoke during the earliest days of life can alter tooth enamel mineralization, even when no visible dental abnormalities appear. This finding was established by researchers at the Ribeirão Preto School of Dentistry at the University of São Paulo (FORP-USP) in Brazil, highlighting a previously undocumented physiological impact of early-life smoke exposure on dental development.

The study utilized an animal model to track enamel formation following controlled secondhand smoke exposure during the neonatal period. Researchers observed measurable disruptions in the mineralization process, indicating that smoke-related compounds interfere with normal enamel development at a microscopic level. The findings were published in May in the peer-reviewed journal *Calcified Tissue International*, providing new evidence that environmental tobacco smoke affects oral health before clinical signs become apparent.

These results underscore the