ADAP Dental Materials 5

Question 1

Which component of an adhesive bonding system chemically modifies the smear layer and opens dentinal tubules?

Accepted Answer

Etchant/conditioner

Answer

The etchant (typically phosphoric acid) removes or modifies the smear layer and opens dentinal tubules to prepare the surface for bonding.

Question 2

Trituration of amalgam alloy refers to the process of:

Accepted Answer

Mechanically mixing alloy powder with mercury in an amalgamator

Answer

Trituration is the mechanical mixing of amalgam alloy powder with liquid mercury in an amalgamator (triturator) to produce a workable mix.

Question 3

Which impression material exhibits the highest dimensional accuracy and is preferred for implant-level impressions?

Accepted Answer

Addition silicone (polyvinyl siloxane)

Answer

Addition silicone (PVS) has the highest dimensional stability, minimal shrinkage, and excellent elastic recovery, making it the gold standard for precision impressions.

Question 4

Galvanic action in the oral cavity can occur when:

Accepted Answer

Dissimilar metals in different restorations touch in saliva

Answer

When two different metals contact each other in the electrolytic environment of saliva, a galvanic cell forms, causing corrosion and a sharp metallic pain.

Question 5

The purpose of applying separating medium (tin foil substitute) to a stone model before constructing an acrylic appliance is to:

Accepted Answer

Prevent the acrylic from bonding chemically to the gypsum model

Answer

Separating medium creates a barrier between acrylic resin and gypsum so the finished appliance can be removed without damaging the model or restoration.

(ADAP) Alternative Dental Assisting Program Practice Test

(ADAP) Alternative Dental Assisting Program Practice Test

ADAP Dental Materials 5