[grey_whiskers]

What is the mass of a crown in grams?

What proportion of that is lead?

Shouldn't be too hard.

The other question is, once the metal core is exposed, what substances which you eat will increase the solubility of the lead? Lead will generally form insoluble precipitates, but that didn't save the Romans.

Cheers!

[tacticalogic]

What is the mass of a crown in grams?

Quarter ounce max - 7 grams?

What proportion of that is lead?

210 ppm = .21mg/g x 7 = 1.47mg, assuming you can leach all of it out before it gets replace once the core is exposed.

Allowed occupational exposure = 40ug/dl.

Average adult blood volume = 6L (600dl)x40ug/dl = 24000ug/1000 = 2.4mg.