Best Grades | Must Pass | Latest Update | Correct Answers | 2026/ 2027
EFDA Board Questions and Correct
Answers | Latest Update
Which of the following is the hardest tissue in the body?
A. Bone
B. Cementum
C. Enamel
D. Dentin
C. Enamel
Enamel is 95-96%
A. Organic
B. Inorganic
B. Inorganic
Which of the following is not a legal duty for an EFDA in Ohio?
A. Place medication in pulp chambers of a tooth with a devital pulp.
B. Place and remove surgical dressings.
C. Perform a therapeutic intraoral adjustment of a fixed bridge
D. Elect the shade for the fabrication of a porcelain veneer crown.
C. Perform a therapeutic intraoral adjustment of a fixed bridge
Nam ether premolar most likely to have there cusps:
A. MN first premolar
B. MN second premolar
C. MX first premolar
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D. MX second premolar
B. MN second premolar
Pins can be used during the placement of a large restoration. Where and why are pins
placed?
A. within enamel for improved retention
B. Within dentin for improved retention
C. Within enamel for increased esthetics
D. Within dentin and enamel, for improved retention
B. Within dentin for improved retention
Some amalgam brands are considered to have high copper content. What would be the
benefit of this type of amalgam?
A. Increase in gamma II phase
B. Decreased creep
C. Increased corrosion
D. Decreased delayed expansion
B. Decreased creep
High copper amalgam content results in:
A. Increased strength
B. Decreased corrosion
C. Decreased creep
D. Decreased gamma II
E. Only A and D
F. All of the above
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F. All of the above
Composites that are considered to be conventional have what types of qualities?
A. Large filler particles for increased strength
B. Small filler particles for increased polishability
C. Best type of composite for anterior restorations
D. Include nano fill and micro filled particles
A. Large filler particles for increased strength
Conventional=Macrofilled
Where is the contact of posterior teeth located when viewing from the buccal?
A. Just buccal to the midline
B. Just lingual to the midline
C. In the middle to occlusal third
D. In the middle to gingival third
C. In the middle to occlusal third
Choose the correct order of steps when placing a class III composite with a rubber dam:
A. Place the rubber dam, choose the composite shade, place a mylar strip
B. Choose the composite shade, place the mylar strip, place the rubber dam
C. Choose the composite shade, place the rubber dam, place the mylar strip
D. Place the rubber dam, place a mylar strip, choose the composite shade.
C. Choose the composite shade, place the rubber dam, place the mylar strip
Mylar strips are placed __________ acid etch.
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A. Before
B. After
A. Before
Which of the following is a situation where a liner and/or base would not be indicated for a
class II restoration?
A. The plural floor is prepared at ideal depth
B. The axial wall is concave due to the removal of extensive decay
C. There is a near pulp exposure
D. The gingival floor is subgingival
A. The plural floor is prepared at ideal depth
All of the following are characteristics of glass ionomers except:
A. Chemically bonds to dentin
B. Unaffected by moisture when placing
C. Releases fluoride
D. Used as a cement, base, liner or permanent restoration
B. Unaffected by moisture when placing
When using a clamp for retraction, why should a floss ligature be tied to it?
A. To use to check the contact of the restoration you are placing
B. To add in the placement and removal of the clamp
C. To prevent breakage of the clamp
D. To prevent swallowing or aspiration of the clamp
D. To prevent swallowing or aspiration of the clamp
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EFDA Board Questions and Correct
Answers | Latest Update
Which of the following is the hardest tissue in the body?
A. Bone
B. Cementum
C. Enamel
D. Dentin
C. Enamel
Enamel is 95-96%
A. Organic
B. Inorganic
B. Inorganic
Which of the following is not a legal duty for an EFDA in Ohio?
A. Place medication in pulp chambers of a tooth with a devital pulp.
B. Place and remove surgical dressings.
C. Perform a therapeutic intraoral adjustment of a fixed bridge
D. Elect the shade for the fabrication of a porcelain veneer crown.
C. Perform a therapeutic intraoral adjustment of a fixed bridge
Nam ether premolar most likely to have there cusps:
A. MN first premolar
B. MN second premolar
C. MX first premolar
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, Best Grades | Must Pass | Latest Update | Correct Answers | 2026/ 2027
D. MX second premolar
B. MN second premolar
Pins can be used during the placement of a large restoration. Where and why are pins
placed?
A. within enamel for improved retention
B. Within dentin for improved retention
C. Within enamel for increased esthetics
D. Within dentin and enamel, for improved retention
B. Within dentin for improved retention
Some amalgam brands are considered to have high copper content. What would be the
benefit of this type of amalgam?
A. Increase in gamma II phase
B. Decreased creep
C. Increased corrosion
D. Decreased delayed expansion
B. Decreased creep
High copper amalgam content results in:
A. Increased strength
B. Decreased corrosion
C. Decreased creep
D. Decreased gamma II
E. Only A and D
F. All of the above
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F. All of the above
Composites that are considered to be conventional have what types of qualities?
A. Large filler particles for increased strength
B. Small filler particles for increased polishability
C. Best type of composite for anterior restorations
D. Include nano fill and micro filled particles
A. Large filler particles for increased strength
Conventional=Macrofilled
Where is the contact of posterior teeth located when viewing from the buccal?
A. Just buccal to the midline
B. Just lingual to the midline
C. In the middle to occlusal third
D. In the middle to gingival third
C. In the middle to occlusal third
Choose the correct order of steps when placing a class III composite with a rubber dam:
A. Place the rubber dam, choose the composite shade, place a mylar strip
B. Choose the composite shade, place the mylar strip, place the rubber dam
C. Choose the composite shade, place the rubber dam, place the mylar strip
D. Place the rubber dam, place a mylar strip, choose the composite shade.
C. Choose the composite shade, place the rubber dam, place the mylar strip
Mylar strips are placed __________ acid etch.
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, Best Grades | Must Pass | Latest Update | Correct Answers | 2026/ 2027
A. Before
B. After
A. Before
Which of the following is a situation where a liner and/or base would not be indicated for a
class II restoration?
A. The plural floor is prepared at ideal depth
B. The axial wall is concave due to the removal of extensive decay
C. There is a near pulp exposure
D. The gingival floor is subgingival
A. The plural floor is prepared at ideal depth
All of the following are characteristics of glass ionomers except:
A. Chemically bonds to dentin
B. Unaffected by moisture when placing
C. Releases fluoride
D. Used as a cement, base, liner or permanent restoration
B. Unaffected by moisture when placing
When using a clamp for retraction, why should a floss ligature be tied to it?
A. To use to check the contact of the restoration you are placing
B. To add in the placement and removal of the clamp
C. To prevent breakage of the clamp
D. To prevent swallowing or aspiration of the clamp
D. To prevent swallowing or aspiration of the clamp
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