Effects from exposure to dental amalgam on systemic mercury levels in patients and dental school students

Results: A statistically significant difference was found among dependent groups 1 and 2 (p = 0.0038), whereas mercury levels increased considerably after the first occupational contact of all subjects. Conclusions: Occupational exposure to dental amalgam poses a potential risk of increasing systemic mercury levels, although urine mercury levels in all the sample participants were below the limits of biologic tolerance.