The participants in the exposed group underwent conventional brain MRI (99 cuts in 15 min) using a 1.5 T GE scanner 24 hrs after amalgam restoration. Urinary mercury level in the exposed individuals was determined before amalgam restoration (hour 0), and 24, 48, 72 and 96 hrs after amalgam restoration, the time course during which the urinary mercury level in subjects who had undergone restorative dentistry procedures,normally returned to baseline levels.15,16 Mercury concentrations in samples were measured by cold vapor atomic absorption spectrophotometry.
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