Rodger:
I think IS brand acrylic is all dental acrylic isn't it? What is it about dental acrylic that makes it better anyway?
Acrylics can be quite biofriendly and have negligible
porosity WHEN PROPERLY PROCESSED.
The problem is most people are
experienced with industrial acrylic which is most commonly extruded for
economy..solid granules are heated and reformed into sheets and rods.....a process that creates significant defect in the polymer
matrix...weakening it, creating microscopic stress fractures in the
polymer chains and introducing porosity.
Rods and sheets of "cell cast" Acrylic, a process resulting in a grade closer to dental materials structurally at least, could be used as raw materials for jewelry construction....but at a significant increase in material cost.
Medical and Dental acrylics are polymerized directly in form from a monomeric syrup. The resulting plastic mass is harder and more dense with a very tight polymer matrix.
Think ice cube vs snowball.....both frozen water but one monolithic in nature the other an accumulated aggregation.
This difference is where the line between a material that is merely
tolerable (barely suitable) in a healed piercing and an immediate
denture which is designed to go directly into the mouth after extensive
multiple extractions..fresh and bloody....we even sink small "nubs"
into the fresh sockets to reduce gum resorption during healing....and
if thats not extreme enough for you....we could always replace a piece
of your skull with acrylic.
http://www.anatomics.com/content/detail.aspx?cid=62