8/28/25, 11:45 PM EFDA Board
EFDA Board Study Guide Exam 2025-2026
Preparation Test Bank Questions with Correct
Answers/ EFDA Certification Exam Prep Questions
with Answers (Brand New!)
How would you describe and correct a margin where
the exploring point only bumps up as it passed from
A. an overextension or flash, tooth to restoration?
correct with additional A. an overextension or flash, correct with additional carving
carving B. An open margin, redo the restoration
C. A submarginal area, correct with finish and polish
D. Over extension or flash, it will correct during normal occlusal
forces
Which of the following is a line angle that would contain
a retention feature for you to condense into with a
class II amalgam preparation?
B. Axiobuccal
A. Mesiobuccal
B. Axiobuccal
C. Mesiodistal
D. GIngivoaxial
Which of the following tasks can not be delegated to efda's in
Ohio?
C. Taking the final impression A. Place composite restorations.
for an MCC (Metal ceramic B. Placing bases and liners
crown) C. Taking the final impression for an MCC (Metal ceramic crown)
D. Finish and plash a large cusp build up amalgam
What anatomical structure on the occlusal surfaces of a
mandibular second molar connects the mesial, central
and distal fossas?
A. Central groove
A. Central groove
B. Buccal and lingual grooves
C. Triangular ridge
D. Transverse ridge
/ 1/29
,8/28/25, 11:45 PM EFDA Board
If you are assisting a left handed dentist, where do you sit?
A. Between the 8 and 10 o'clock position
A. Between the 8 and 10 B. At the 12 o'clock position
o'clock position C. Between 2 and 4 o'clock
D. Between 4 and 7 o'clock
A contra-angle matrix retainer may be indicated when
restoring which of the following MN molar
preparations?
A. MODB with the distobuccal
A. MODB with the distobuccal cusp missing
cusp missing
B. MODL with mesiolingual cusp missing
C. MODL with both lingual cusps missing
D. MOD that extends subgingival on the distal
Which type of matrix retainer is placed from the lingual?
B. Contra angle A. Universal
B. Contra angle
Which two materials can combine during trituration
form the Gamma II phase which is NOT desirable and
results in poorer physical properties?
D. Tin and mercury
A. Tin and copper
B. Silver and mercury
C. Mercury and copper
D. Tin and mercury
On a patient with ideal tooth alignment, which
embrasure will you attempt to place the wedge for a
class II MO amalgam restoration?
B. Lingual embrasure
A. Buccal embrasure
B. Lingual embrasure
C. Occlusal embrasure
D. Place a wedge in both the buccal and lingual embrasure for the
best seal
Regarding the placement of a large Class IV composite
restoration, which statement is true?
C. Using a mylar strip A. The curing wand should be close enough to touch the
restoration
provides the most ideal
B. This composite restoration should be cured only from the
surface smoothness lingual
C. Using a mylar strip provides the most ideal surface
smoothness
D. If the tooth is contaminated with saliva, clean by re-teching for
30 seconds
/ 2/29
, 8/28/25, 11:45 PM EFDA Board
Which anatomical feature would not be placed in a MOD on
tooth 29?
A. Central pit A. Central pit
B. Central groove
C. Marginal ridge
D. Transverse ridge
Which of the following statements describes the desired
occlusion when restoring a class II amalgam?
D. The amalgam has A. The patient can distinctly feel the new restoration in centric
occlusion
articulating paper marks that
B. Premature contacts occur in lateral extrusive occlusion
are equal to those of adjacent C. The amalgam is just slightly out of occlusion
tooth structur D. The amalgam has articulating paper marks that are
equal to those of adjacent tooth structure
Which of the following is a reason for finishing and polishing
amalgam restorations?
C. The process can contribute A. The process results in a restoration that is more plaque
to retentive
periodontal health by B. The process can increase corrosion
removing overhangs
C. The process can contribute to periodontal health by removing
overhangs
D. The process can decrease marginal integrity
/ 3/29
EFDA Board Study Guide Exam 2025-2026
Preparation Test Bank Questions with Correct
Answers/ EFDA Certification Exam Prep Questions
with Answers (Brand New!)
How would you describe and correct a margin where
the exploring point only bumps up as it passed from
A. an overextension or flash, tooth to restoration?
correct with additional A. an overextension or flash, correct with additional carving
carving B. An open margin, redo the restoration
C. A submarginal area, correct with finish and polish
D. Over extension or flash, it will correct during normal occlusal
forces
Which of the following is a line angle that would contain
a retention feature for you to condense into with a
class II amalgam preparation?
B. Axiobuccal
A. Mesiobuccal
B. Axiobuccal
C. Mesiodistal
D. GIngivoaxial
Which of the following tasks can not be delegated to efda's in
Ohio?
C. Taking the final impression A. Place composite restorations.
for an MCC (Metal ceramic B. Placing bases and liners
crown) C. Taking the final impression for an MCC (Metal ceramic crown)
D. Finish and plash a large cusp build up amalgam
What anatomical structure on the occlusal surfaces of a
mandibular second molar connects the mesial, central
and distal fossas?
A. Central groove
A. Central groove
B. Buccal and lingual grooves
C. Triangular ridge
D. Transverse ridge
/ 1/29
,8/28/25, 11:45 PM EFDA Board
If you are assisting a left handed dentist, where do you sit?
A. Between the 8 and 10 o'clock position
A. Between the 8 and 10 B. At the 12 o'clock position
o'clock position C. Between 2 and 4 o'clock
D. Between 4 and 7 o'clock
A contra-angle matrix retainer may be indicated when
restoring which of the following MN molar
preparations?
A. MODB with the distobuccal
A. MODB with the distobuccal cusp missing
cusp missing
B. MODL with mesiolingual cusp missing
C. MODL with both lingual cusps missing
D. MOD that extends subgingival on the distal
Which type of matrix retainer is placed from the lingual?
B. Contra angle A. Universal
B. Contra angle
Which two materials can combine during trituration
form the Gamma II phase which is NOT desirable and
results in poorer physical properties?
D. Tin and mercury
A. Tin and copper
B. Silver and mercury
C. Mercury and copper
D. Tin and mercury
On a patient with ideal tooth alignment, which
embrasure will you attempt to place the wedge for a
class II MO amalgam restoration?
B. Lingual embrasure
A. Buccal embrasure
B. Lingual embrasure
C. Occlusal embrasure
D. Place a wedge in both the buccal and lingual embrasure for the
best seal
Regarding the placement of a large Class IV composite
restoration, which statement is true?
C. Using a mylar strip A. The curing wand should be close enough to touch the
restoration
provides the most ideal
B. This composite restoration should be cured only from the
surface smoothness lingual
C. Using a mylar strip provides the most ideal surface
smoothness
D. If the tooth is contaminated with saliva, clean by re-teching for
30 seconds
/ 2/29
, 8/28/25, 11:45 PM EFDA Board
Which anatomical feature would not be placed in a MOD on
tooth 29?
A. Central pit A. Central pit
B. Central groove
C. Marginal ridge
D. Transverse ridge
Which of the following statements describes the desired
occlusion when restoring a class II amalgam?
D. The amalgam has A. The patient can distinctly feel the new restoration in centric
occlusion
articulating paper marks that
B. Premature contacts occur in lateral extrusive occlusion
are equal to those of adjacent C. The amalgam is just slightly out of occlusion
tooth structur D. The amalgam has articulating paper marks that are
equal to those of adjacent tooth structure
Which of the following is a reason for finishing and polishing
amalgam restorations?
C. The process can contribute A. The process results in a restoration that is more plaque
to retentive
periodontal health by B. The process can increase corrosion
removing overhangs
C. The process can contribute to periodontal health by removing
overhangs
D. The process can decrease marginal integrity
/ 3/29
