RG Exam Review: Crown & Bridge
750
18-karat gold solder would have a fineness of:
CROWN
A dental restoration that fits over a prepared tooth and is secured by cement is a/an:
CLASS Ⅳ
An inlay that replaces two to three surfaces of an anterior tooth is:
INTERALLOYING
Heating a solder too long will cause:
20
How many pennyweights in 1 Troy ounce?
WEAK JOINTS
Interalloying causes:
the SOLDER GAP is TOO SMALL
Interalloying occurs when:
HELPS to MAINTAIN STABILITY if a TOOTH IS LOST
One advantage specific to cusp to marginal ridge occlusion is that it:
DRAW
The ease at which a crown or a bridge can be withdrawn is:
CURVE of WILSON
The lingual inclination of mandibular posterior teeth is:
CLASS Ⅱ
The onlay is a modification of what classification?
BENNETT MOVEMENT
The side-shift of the mandible that occurs during lateral movement is:
a CANTILEVER BRIDGE
The type of bridge which has abutments only on one side of the pontic is:
⅞ CROWN
The type of crown that covers all except the MB is:
PARENT METAL
What actually melts the solder?
FILL the ROOT TIP
What are gutta-percha points used for?
TIN
What is added to soldering alloys to lower the fusion temperature?
SETTING TIME
What will affect the expansion of investments?
MUTUALLY PROTECTED
When the canines and anterior teeth cause the posterior teeth to disocclude in eccentric excursions, this is called:
PROTRUSIVE
When the mandible is ½ cusp or more forward of its centric relation, it is:
it BECOMES BRITTLE
When wax is overheated what happens to it?
CLASS Ⅴ
Which classification includes the facial surface near the cervical?
SEMI-PRECISION ATTACHMENT
Which is sometimes used as a stress breaker?
REVERSIBLE HYDROCOLLOID
Which type of impression material sets by physical instead of chemical action?
QUARTZ
Which type of investment is preferred for soldering investment?
FULL CROWN
Which type of restoration would need the most tooth reduction?
TYPE Ⅰ INLAY WAX
Which type of wax is hardest?
TOOTH REDUCTION
Which would be a disadvantage of a bridge over a partial denture?
SEPARATING DISC
Which would you use first after the investment had been cleaned off the metal casting ?
MIXING
Which zone of a casting torch flame contains unburned gas and oxygen and is dark blue in color?