1|Page
EFDA FINAL EXAM QUESTION BANK 2025 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALL ANSWERD
{1100 Q & A} ALREADY GRADED A+ / HOTEL EFDA
STUDY GUIDE EXAM/ FREQUENTLY TESTED
QUESTIONS | GUARANTEED PASS
Slot preparations are usually reserved for ____________ patients.
A. Younger
B. Older
C. Pediatric
D. Teen - ✔✔✔ Correct Answer > OLDER
An oral habit consisting of an involuntary grinding and clenching
of the teeth generally occurring at night when the patient is
asleep s known as _______
A. Erosion
B. Bruxing
C. Abrasion - ✔✔✔ Correct Answer > B. Bruxing
Amalgam that contains more than ______ mercury is considered
to be "mercury-rich"
,2|Page
A. 49%
B. 45%
C. 38%
D. 54% - ✔✔✔ Correct Answer > D. 54%
The spaced adjacent to and surrounding the contact of the teeth
in the same arch are referred to as
A. Ambrasures
B. Embrasures
C. Contact area
D. Contact point - ✔✔✔ Correct Answer > B. Embrasures
Which of the following is the hardest material in the body
A. Cementum
B. Bone
C. Dentin
D. Enamel - ✔✔✔ Correct Answer > D. Enamel
A _____ ______is the ridge crossing the occlusal surface of only
maxillary molars in an ____ direction - ✔✔✔ Correct Answer > oblique
ridge , oblique
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Which of the following should NOT be done when checking a
patient's bite
A. Dry off tooth and opposing
B. Remove all excursive contact without removing the ICP marks
previously made
C. Have patient bit down hard and vigorously tap their teeth
D. Wipe off all remaining marks on teeth with gauze square after
bite is correct - ✔✔✔ Correct Answer > C. Have patient bite down hard
and vigorously tap their teeth
Loss of tooth structure results from which three basic
physiological-chemical mechanisms?
1.
2.
3. - ✔✔✔ Correct Answer > 1. Stress
2 friction (attrition or abrasion)
3. Corrosion (erosion)
Which of the following metal make up 15-30% of amalgam?
A. Copper
B zinc
C. Tin
D. Silver - ✔✔✔ Correct Answer > C. Tin
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The characteristics of amalgam are its ____ and _______ ____ - ✔✔✔
Correct Answer > strength, setting time
A high percentage of mercury strengthens the amalgam and
makes polishing the surface easier. Amalgam that contains more
than 54% mercury is considered "mercury rich"
A. The first statement is true, the second statement is false
B. The first statement is false, the second statement is true
C. Both statements are true
D. Both statements are false - ✔✔✔ Correct Answer > B the first
statement is false the second statement is true
The compressive strength of amalgam 20 minutes after
placement is only _____% of the strength it will have at the end of
one week ?
A. 1%
B. 3%
C. 6%
D. 10% - ✔✔✔ Correct Answer > C. 6%
The largest embrasure is usually the ___ therefore It is the best
suited for wedge placement - ✔✔✔ Correct Answer > lingual
EFDA FINAL EXAM QUESTION BANK 2025 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALL ANSWERD
{1100 Q & A} ALREADY GRADED A+ / HOTEL EFDA
STUDY GUIDE EXAM/ FREQUENTLY TESTED
QUESTIONS | GUARANTEED PASS
Slot preparations are usually reserved for ____________ patients.
A. Younger
B. Older
C. Pediatric
D. Teen - ✔✔✔ Correct Answer > OLDER
An oral habit consisting of an involuntary grinding and clenching
of the teeth generally occurring at night when the patient is
asleep s known as _______
A. Erosion
B. Bruxing
C. Abrasion - ✔✔✔ Correct Answer > B. Bruxing
Amalgam that contains more than ______ mercury is considered
to be "mercury-rich"
,2|Page
A. 49%
B. 45%
C. 38%
D. 54% - ✔✔✔ Correct Answer > D. 54%
The spaced adjacent to and surrounding the contact of the teeth
in the same arch are referred to as
A. Ambrasures
B. Embrasures
C. Contact area
D. Contact point - ✔✔✔ Correct Answer > B. Embrasures
Which of the following is the hardest material in the body
A. Cementum
B. Bone
C. Dentin
D. Enamel - ✔✔✔ Correct Answer > D. Enamel
A _____ ______is the ridge crossing the occlusal surface of only
maxillary molars in an ____ direction - ✔✔✔ Correct Answer > oblique
ridge , oblique
,3|Page
Which of the following should NOT be done when checking a
patient's bite
A. Dry off tooth and opposing
B. Remove all excursive contact without removing the ICP marks
previously made
C. Have patient bit down hard and vigorously tap their teeth
D. Wipe off all remaining marks on teeth with gauze square after
bite is correct - ✔✔✔ Correct Answer > C. Have patient bite down hard
and vigorously tap their teeth
Loss of tooth structure results from which three basic
physiological-chemical mechanisms?
1.
2.
3. - ✔✔✔ Correct Answer > 1. Stress
2 friction (attrition or abrasion)
3. Corrosion (erosion)
Which of the following metal make up 15-30% of amalgam?
A. Copper
B zinc
C. Tin
D. Silver - ✔✔✔ Correct Answer > C. Tin
, 4|Page
The characteristics of amalgam are its ____ and _______ ____ - ✔✔✔
Correct Answer > strength, setting time
A high percentage of mercury strengthens the amalgam and
makes polishing the surface easier. Amalgam that contains more
than 54% mercury is considered "mercury rich"
A. The first statement is true, the second statement is false
B. The first statement is false, the second statement is true
C. Both statements are true
D. Both statements are false - ✔✔✔ Correct Answer > B the first
statement is false the second statement is true
The compressive strength of amalgam 20 minutes after
placement is only _____% of the strength it will have at the end of
one week ?
A. 1%
B. 3%
C. 6%
D. 10% - ✔✔✔ Correct Answer > C. 6%
The largest embrasure is usually the ___ therefore It is the best
suited for wedge placement - ✔✔✔ Correct Answer > lingual
