"Mock" Written EFDA Board UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Why is a thin layer of calcium hydroxide considered therapeutic when placed in a deep prep? -
CORRECT ANSWER - Stimulates a thickening of dentin
At which line angles are the retention grooves in a class II amalgam located? - CORRECT
ANSWER - Linguoaxial and buccoaxial
What is dentin primarily composed of? - CORRECT ANSWER - Dentinal tubules with
protoplasmic extensions
What is enamel composed of? - CORRECT ANSWER - 95% organic matter
At which portion of the tooth is enamel thicker? - CORRECT ANSWER - Incisal/occlusal
Which is darker in color, enamel or dentin? - CORRECT ANSWER - Dentin
ZOE placed in a deep DO amalgam to replace axial and pulpal walls should have what type of
base shape? - CORRECT ANSWER - Rounded/beveled axis-pulpal line angle
Which material is NOT compatible with composite? - CORRECT ANSWER - Zinc oxide
eugenol cement
A lingual pit on tooth #7 is what type of restoration? - CORRECT ANSWER - Class I
Where would you place a base? - CORRECT ANSWER - On dentin surfaces
, Which metal adds strength and decreases expansion of amalgam? - CORRECT
ANSWER - Copper
What is the order of placement in a very deep prep for amalgam that has a near-pupal exposure
and loss of axial wall contour? - CORRECT ANSWER - Calcium hydroxide, cavity
varnish, zinc phosphate cement
What component results in decreased expansion of amalgam? - CORRECT ANSWER -
High copper content
What is galvanization? - CORRECT ANSWER - Occurs when dissimilar metals touch
inside the mouth and produce an electric current that causes pain
Which material has poly acrylic acid as a component of its liquid? - CORRECT
ANSWER - Glass ionomer cement
Why are bonding agents used before composite? - CORRECT ANSWER - To provide a
bond to both the dentin and composite
If an explorer catches ONLY when moving from the tooth to restoration, what is this? -
CORRECT ANSWER - Overextension/flash
What is legal for an EFDA in Ohio to do? - CORRECT ANSWER - Apply sealants,
irrigate/dry endodontic canals, and place surgical dressings
What is NOT legal for an EFDA in Ohio to do? - CORRECT ANSWER - Adjust occlusion
on a fixed bridge
Where is the contact area located between posterior teeth? - CORRECT ANSWER -
Middle to occlusal third
ACTUAL Exam Questions and CORRECT
Answers
Why is a thin layer of calcium hydroxide considered therapeutic when placed in a deep prep? -
CORRECT ANSWER - Stimulates a thickening of dentin
At which line angles are the retention grooves in a class II amalgam located? - CORRECT
ANSWER - Linguoaxial and buccoaxial
What is dentin primarily composed of? - CORRECT ANSWER - Dentinal tubules with
protoplasmic extensions
What is enamel composed of? - CORRECT ANSWER - 95% organic matter
At which portion of the tooth is enamel thicker? - CORRECT ANSWER - Incisal/occlusal
Which is darker in color, enamel or dentin? - CORRECT ANSWER - Dentin
ZOE placed in a deep DO amalgam to replace axial and pulpal walls should have what type of
base shape? - CORRECT ANSWER - Rounded/beveled axis-pulpal line angle
Which material is NOT compatible with composite? - CORRECT ANSWER - Zinc oxide
eugenol cement
A lingual pit on tooth #7 is what type of restoration? - CORRECT ANSWER - Class I
Where would you place a base? - CORRECT ANSWER - On dentin surfaces
, Which metal adds strength and decreases expansion of amalgam? - CORRECT
ANSWER - Copper
What is the order of placement in a very deep prep for amalgam that has a near-pupal exposure
and loss of axial wall contour? - CORRECT ANSWER - Calcium hydroxide, cavity
varnish, zinc phosphate cement
What component results in decreased expansion of amalgam? - CORRECT ANSWER -
High copper content
What is galvanization? - CORRECT ANSWER - Occurs when dissimilar metals touch
inside the mouth and produce an electric current that causes pain
Which material has poly acrylic acid as a component of its liquid? - CORRECT
ANSWER - Glass ionomer cement
Why are bonding agents used before composite? - CORRECT ANSWER - To provide a
bond to both the dentin and composite
If an explorer catches ONLY when moving from the tooth to restoration, what is this? -
CORRECT ANSWER - Overextension/flash
What is legal for an EFDA in Ohio to do? - CORRECT ANSWER - Apply sealants,
irrigate/dry endodontic canals, and place surgical dressings
What is NOT legal for an EFDA in Ohio to do? - CORRECT ANSWER - Adjust occlusion
on a fixed bridge
Where is the contact area located between posterior teeth? - CORRECT ANSWER -
Middle to occlusal third
