On May 7, 8:46 am, Dartos <tuthjoc...@myturbonet . com > wrote:
> So are you sweetie.
Please don't call me "sweetie". No one who knows me would call me
that
(for good reason).
> Hard to make 'mercury dust' cutting with a water spray.
>
I don't think it is that difficult at all to create Hg vapor. Remember
that Hg isn't like most metals so it actually goes from vapor to a
solid to a liquid quite easily.The idea that the Hg remains bound to
silver throughout the drilling process is a fiction. When you drill an
amalgam and heat it, inevitably creating Hg in elemental form what %
of Hg is converted into Hg particles and then Hg in liquid form. Would
you splash water on a puddle of Hg?
Obviously It would seem that cooling the filling would reduce Hg
exposure from drilling but I would guess that 1) many dentists don't
use such a system or haven't in the past 2) It wouldn't eleminate it,
especailly with a high speed drill. 3) The patient can still ingest
the Hg (unless you've employed another advanced particulate suction
system).
.
Have you attempted to quantify what the actuall reduction in exposure
is for the patient and dentist for all three states Hg can take? Do
your ADA brochures say
how much of the pulverized amalgam is converted to elemental Hg? Do
they include a hypothetical table suchs as:
Type of equipment % of Hg converted to liquid % liquid-
vapor
Highspeed/drill
50 30
no water cooling
Low speed drill/
20 15
water cooling
Highspeed drill/
25 50
water cooling
Or do they just say, drilling fillings safe, ADA expert says so!