melting RANGE (not point) many numerous components
THERMOPLASTIC (soften under heat and solidify when cooled)
baseplate - correct answer ✔about 75% paraffin
brittle at room temp.
3x6 sheet, usually pink
uses:
spacer in custom tray fabrication
bite registration
initial arch pattern for a denture
bite rims in prosthetic dentistry
boxing wax - correct answer ✔soft and pliable at room temp
red in color, 10 x 2 x 1/4" thick strip
,use:
boxing the periphery of an impression to form a base when pouring in gypsum
bite registration - correct answer ✔usually dark green, yellow or blue; very
similar to baseplate wax
1mm thick, often in shape of arch
also called "occlusal wax"
sticky wax - correct answer ✔hard and brittle @ room temp.
VERY tacky when melted
supplied in 6" sticks or square cakes
bright orange or yellow in color
heated over an open flame
use: temporary luting (cementing) in lab
example - broken denture, articulation of models
utility wax - correct answer ✔soft and pliable at room temp.
supplied on 6 or 12" ropes
red, white, or blue in color
uses:
post-damming stock impression trays
boarder molding stock impression trays
temporary mounting models together
orthodontic wax (periphery wax is very similar!)
, inlay/casting wax - correct answer ✔used to fabricate the wax pattern in
investing and casting procedures
supplied in sticks or cakes in dark colors for contrast against model (dark blue
or green)
hardness is dictated by the amount of paraffin added
inlay wax: thermoplastic material - correct answer ✔for the fabrication of the
wax pattern
accuracy is critical to fit
40-60% paraffin (determines melting point)
inlay wax direct technique - correct answer ✔medium hardness
wax pattern is fabricated in the mouth on the prepped tooth
inlay wax indirect technique - correct answer ✔soft
fabricated on the model in lab
melted in flame; must be evenly melted
applied to prep in layers then carved to reproduce tooth structure
must be DARK (blue or green) to provide good line of demarcation against
model
no flaking or chipping should occur during carving
must remain rigid until burnout; must burn out leaving no residue
impression compound - correct answer ✔brittle at room temp.
softens when heated
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