High-field MRI and mercury release from dental amalgam fillings.

摘要: Mercury is among the most toxic nonradioactive elements which may cause toxicity even at low doses. Some studies showed release of mercury from dental amalgam fillings in individuals who used mobile phone. This study was conducted to assess effect high-field MRI on filling. We studied two groups students with identical tooth decays requiring a similar pattern restorative dentistry. They were exposed magnetic flux density 1.5 T produced by machine. 16 otherwise healthy decay participated this study. underwent dentistry procedures and randomly divided into MRI-exposed control arms. Urinary concentrations subjects measured before (hour 0) 48 72 hrs after restoration, using cold vapor atomic absorption spectrometry. determined 0), 24, 48, 96 restoration. Unlike subjects, they conventional brain (15 min, 99 slices), 24 The mean±SD urinary levels increased linearly baseline value 20.70±17.96 24.83±22.91 μg/L MRI. In group, concentration decreased 20.70±19.77 16.14±20.05 μg/L. difference between (96 h restoration),was significant (p=0.046). These findings provide further support for noxious (exposure strong field)and fillings.