Indirect Quiz 4 Working cast Questions with complete solution 2024/2025
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Course
DENTURES,DX AND TX PLANNING
Institution
DENTURES,DX AND TX PLANNING
Indirect Quiz 4 Working cast Questions with complete solution 2024/2025 Indirect Quiz 4 Working cast, Pindex, Trimming die
how to use boxing wax - correct answer warm boxing over flame and adapt to tray. Then secure it to the tray using sticky wax
the wetabilty or pourability of an impressi...
Indirect Quiz 4 Working cast, Pindex,
Trimming die
how to use boxing wax - correct answer ✔warm boxing over flame and adapt
to tray. Then secure it to the tray using sticky wax
the wetabilty or pourability of an impression made of a hydrophobic
impression material can be improved by using - correct answer ✔a
surfactant on the impression
to avoid surface porosity of models - correct answer ✔delay pouring with
plaster for 15 minutes
how long can the impression be poured up to - correct answer ✔14 days
what stone is mixed under vacuum after the impression has been recorded? -
correct answer ✔type V stone (Jade stone)
jade stone has one of the highest - correct answer ✔expansion within
gypsum materials and is sufficiently strong to prevent breakage of the cast
during subsequent fabrication procedures
impression is poured without trapping - correct answer ✔air bubbles using a
material
how to add stone to impression - correct answer ✔small increments above
the preparation. Then tilt tray to fill the preparation. Pour it one direction
bubbles form where - correct answer ✔two masses of material meet
, the full arch impression are poured with jade stone to what thickness above
cervical areas? - correct answer ✔20-25mm, leaving the palatal portion
exposed as possible
how long does it take for jade stone to set? - correct answer ✔30 minutes.
Casts are then removed from the impression
definitive (working) cast - correct answer ✔a replica of the tooth surfaces,
residual ridge areas, and/or other parts of the dental arch and/or facial
structures used to fabricate a dental restoration or prosthesis in the lab using
"indirect technique"; also called final cast
prerequisites for accurate working casts - correct answer ✔prepared and
unprepared tooth surfaces
adjacent unprepared teeth must be free of voids
teeth involved in anterior guidance must be complete
all occlusal surfaces must be accurate to allow for precise occlusion of the
opposing casts
all relevant soft tissues must be duplicated
trim the cast to about - correct answer ✔10mm thickness above the cervical
areas
the base should be - correct answer ✔flat and parallel to the occlusal plane
after the dental stone has dried, the buccal and lingual folds can be thinned
with an - correct answer ✔arbor band, cast trimmer, or carbide cutter in a
lathe in a manner of taper at the base to prevent locking in by undercut
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