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The ease at which a crown or a bridge can be withdrawn is: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?