Class III, IV, and V preps Flashcards
Do you need to clean the tooth before a class III prep?
Yes
What is used to clean the tooth?
Pumice
Should you take shade before or after dam placement?
Before
When should you check occlusion?
Before placing dam
When can you leave unsupported enamel in a composite prep?
Class 3 facial wall
Should liner be placed before or after the etch?
Before etching
SHould glumma be placed before or after the etch?
After
Which of the following is a location you would NOT place a bevel?
subgingival margin
axiopulpal line angle
gingival margin
always bevel margins in composite preparations
Subgingival margin
Which of the following types of burs will create the most surface area?
coarse diamond
fluted carbide
polishing point
Coarse Diamond
Which ingredient in desensitizing toothpastes is primarily responsible for its desensitizing ability?
Potassium nitrate
Hydrogen peroxide
Gluma
Sodium laurel sulfate
Potassium nitrate
In ideal Class III composite preparations, facial contact should what?
be broken in the gingival portion only
remain intact for optimal esthetics
be broken by 0.5mm for placement of matrix band
be broken by 0.5mm for optimal esthetics
be broken in the gingival portion only
When using an enamel hatchet to trim the buccal and lingual walls of a Class II amalgam box, the broad, flat side of its blade should be held:
At a 90° angle to axial surface of tooth
At a 45° angle to axial surface of tooth
At any angle, depending on what surface you need to cut
At a 45° angle to the occlusal surface of tooth
At a 90° angle to axial surface of tooth
Is it acceptable for a class III to leave sound undermined enamel to preserve incisal contact?
Yes
What should the inciso-gingival length of a class III prep be on a max lateral?
1.5 mm
What should the inciso-gingival length of a class III prep be on a max central?
2 mm