Acrylic denture base polymers, cobalt chromium denture base plus prosthetic Flashcards
impression compound materials
impression compound in a 5mm thick sheet
green stick
what impression material is used for edentulous ridges in stock tray
impression compound in 5mm sheet
what impression material is used for free end saddles for p dentures prior to alginate
impression compound in 5mm sheet
what impression material is used for border extensions of impression trays
green stick
how do you condition impression compound prior to use
55-65 degree in napkin/ cloth lined water bath
why you must avoid prolonged immersion when conditioning impression compound
stearic acid will leach out
how do you condition green stick
heat in flame and apply to tray
temper in water
zinc oxide eugenol impression material presentation
PASTE 1 - ZnO, olive oil, zinc acetate and water
PASTE 2 - eugenol, kaolin/ talc
when would you use zinc oxide eugenol impression material
need a close fitting special tray
approx 1mm spacer
how is the expansion of dental impression plaster decreased
potassium sulphate
borax
acrylic denture base materials
powder - PMMA beads, benzoyl peroxide, salts of cd/fe or organic dyes
liquid - MMA, ethylenglycoldimethacrylate, hydroquinone
stages of mixing acrylic denture base
sandy
stringy
dough
rubbery
hard
mixing acrylic denture base reaction
free radical addition polymerisation
exothermic
why, in the making of acrylic denture base, is it placed in water bath/ electrical oven
decompose benzoyl peroxide
CoCr alloy fusion temp
1200-1500 degrees celcius
