- The effect of gypsum products and separating materials on the typography of denture base materials.
The effect of gypsum products and separating materials on the typography of denture base materials.
The Journal of prosthetic dentistry (1980-09-01)
D N Firtell, J F Walsh, J M Elahi
PMID6931220
ABSTRACT
The typography of polymethyl methacrylate processed against various gypsum products coated with various separating materials was studied under an SEM. Tinfoil and two commercial tin foil substitutes were used as separating material during processing, and the surfaces of the resulting acrylic resin forms were studied for topographical differences. Tinfoil and alpha 2 hemihydrates produced the smoothest surfaces. As a practical solution, a good quality tinfoil substitute and alpha 1 hemihydrate could be used when processing polymethyl methacrylate resin.
MATERIALS
Product Number
Brand
Product Description
Tin, foil, not light tested, 150x150mm, thickness 0.007mm, 97.4%
Tin, foil, light tested, 50x50mm, thickness 0.008mm, 99.75%
Tin, foil, 5m coil, thickness 0.05mm, as rolled, 98.8%
Tin, foil, 6mm disks, thickness 0.1mm, as rolled, 99.95%
Tin, foil, 8mm disks, thickness 0.007mm, 99.75%
Tin, foil, 4mm disks, thickness 0.0125mm, 97.4%
Tin, foil, 4mm disks, thickness 0.01mm, 97.4%
Tin, foil, 15mm disks, thickness 1.5mm, as rolled, 99.99+%
Tin, foil, 50mm disks, thickness 0.075mm, as rolled, 98.8%
Tin, foil, 4mm disks, thickness 0.5mm, as rolled, 99.99+%
Tin, foil, 4mm disks, thickness 0.025mm, as rolled, 98.8%
Tin, foil, 4mm disks, thickness 0.125mm, as rolled, 99.99+%
Tin, foil, 6mm disks, thickness 0.125mm, as rolled, 99.99+%
Tin, foil, 5m coil, thickness 0.025mm, as rolled, 98.8%
Tin, foil, 50mm disks, thickness 0.125mm, as rolled, 98.8%
Tin, foil, 6mm disks, thickness 0.0125mm, 99.75%
Tin, foil, 4mm disks, thickness 0.025mm, as rolled, 99.95%
Tin, foil, 8mm disks, thickness 0.06mm, as rolled, 99.99+%
Tin, foil, 8mm disks, thickness 0.006mm, 97.4%
Tin, foil, 6mm disks, thickness 0.15mm, as rolled, 98.8%
Tin, foil, 4mm disks, thickness 0.008mm, 99.75%
Tin, foil, 4mm disks, thickness 0.004mm, 99.75%
Tin, foil, 6mm disks, thickness 0.009mm, 97.4%
Tin, foil, 6mm disks, thickness 0.030mm, as rolled, 97.4%
Tin, foil, not light tested, 150x150mm, thickness 0.006mm, 97.4%
Tin, foil, 10mm disks, thickness 0.006mm, 97.4%
Tin, foil, 50x50mm, thickness 0.125mm, as rolled, 99.99+%
Tin, foil, 10mm disks, thickness 0.25mm, as rolled, 99.99+%
Tin, foil, 100x100mm, thickness 0.25mm, as rolled, 99.99+%
Tin, foil, 1m coil, thickness 0.030mm, as rolled, 97.4%