EFDA EXAM AND PRACTICE EXAM NEWEST 2026 TEST
BANK| EFDA EXAM REVIEW WITH COMPLETE 400
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (MOST RECENT!!)
1. On which area of the tooth is the enamel thickest?
A. Cervical third
B. Incisal edge
C. Occlusal surface
D. Occlusal and incisal surface
Correct Answer: D
Rationale: Enamel is thickest at the occlusal and incisal surfaces
where functional demands (mastication) are highest. It becomes
thinner toward the cervical margin.
2. Which tissue provides the defense and developmental
functions of a tooth?
A. Cementum
B. Dentin
C. Enamel
D. Pulp
1
,Correct Answer: D
Rationale: The pulp contains blood vessels, nerves, and
odontoblasts. It is responsible for dentin formation (primary,
secondary, and reparative) and provides sensory and nutritive
functions.
3. Rounded borders of enamel which form the mesial and
distal of the occlusal surface on posterior teeth are named:
A. Cusps
B. Fossae
C. Marginal ridges
D. Triangular ridges
Correct Answer: C
Rationale: Marginal ridges are the rounded, elevated borders of
enamel that form the mesial and distal boundaries of the occlusal
surface on posterior teeth.
4. What is the name for the surface at the base of a Class I
cavity preparation?
A. Axial wall
B. Cavosurface margin
C. Pulpal floor
D. Gingival seat
2
,Correct Answer: C
Rationale: The pulpal floor is the surface at the base of a Class I
cavity preparation (occlusal surface), located between the pulpal
wall and the pulpal portion of the cavity.
5. Which tooth has the longest root in the mouth?
A. Mandibular canine
B. Maxillary cuspid/canine
C. Maxillary central incisor
D. Mandibular first molar
Correct Answer: B
Rationale: The maxillary canine (cuspid) possesses the longest
root of any tooth in the mouth, which supports its function in
tearing food.
6. If present, the cusp of Carabelli is located on which molar?
A. Mandibular first molar
B. Maxillary first molar
C. Maxillary second molar
D. Mandibular second molar
Correct Answer: B
Rationale: The cusp of Carabelli is an accessory cusp found on
3
, the mesiolingual aspect of the maxillary first molar and is
considered a morphological trait.
7. The fossa found in the central portion of a molar is named
the _____ fossa.
A. Central
B. Distal
C. Mesial
D. Triangular
Correct Answer: A
Rationale: The central fossa is the deepest depression found in
the central portion of the occlusal surface of molars.
8. In which direction does the oblique ridge travel across the
occlusal surface of a maxillary molar?
A. Mesiobuccal to Distolingual
B. Distobuccal to Mesiolingual
C. Mesial to Distal
D. Buccal to Lingual
Correct Answer: B
Rationale: The oblique ridge on maxillary molars runs from the
distobuccal cusp to the mesiolingual cusp.
4
BANK| EFDA EXAM REVIEW WITH COMPLETE 400
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (MOST RECENT!!)
1. On which area of the tooth is the enamel thickest?
A. Cervical third
B. Incisal edge
C. Occlusal surface
D. Occlusal and incisal surface
Correct Answer: D
Rationale: Enamel is thickest at the occlusal and incisal surfaces
where functional demands (mastication) are highest. It becomes
thinner toward the cervical margin.
2. Which tissue provides the defense and developmental
functions of a tooth?
A. Cementum
B. Dentin
C. Enamel
D. Pulp
1
,Correct Answer: D
Rationale: The pulp contains blood vessels, nerves, and
odontoblasts. It is responsible for dentin formation (primary,
secondary, and reparative) and provides sensory and nutritive
functions.
3. Rounded borders of enamel which form the mesial and
distal of the occlusal surface on posterior teeth are named:
A. Cusps
B. Fossae
C. Marginal ridges
D. Triangular ridges
Correct Answer: C
Rationale: Marginal ridges are the rounded, elevated borders of
enamel that form the mesial and distal boundaries of the occlusal
surface on posterior teeth.
4. What is the name for the surface at the base of a Class I
cavity preparation?
A. Axial wall
B. Cavosurface margin
C. Pulpal floor
D. Gingival seat
2
,Correct Answer: C
Rationale: The pulpal floor is the surface at the base of a Class I
cavity preparation (occlusal surface), located between the pulpal
wall and the pulpal portion of the cavity.
5. Which tooth has the longest root in the mouth?
A. Mandibular canine
B. Maxillary cuspid/canine
C. Maxillary central incisor
D. Mandibular first molar
Correct Answer: B
Rationale: The maxillary canine (cuspid) possesses the longest
root of any tooth in the mouth, which supports its function in
tearing food.
6. If present, the cusp of Carabelli is located on which molar?
A. Mandibular first molar
B. Maxillary first molar
C. Maxillary second molar
D. Mandibular second molar
Correct Answer: B
Rationale: The cusp of Carabelli is an accessory cusp found on
3
, the mesiolingual aspect of the maxillary first molar and is
considered a morphological trait.
7. The fossa found in the central portion of a molar is named
the _____ fossa.
A. Central
B. Distal
C. Mesial
D. Triangular
Correct Answer: A
Rationale: The central fossa is the deepest depression found in
the central portion of the occlusal surface of molars.
8. In which direction does the oblique ridge travel across the
occlusal surface of a maxillary molar?
A. Mesiobuccal to Distolingual
B. Distobuccal to Mesiolingual
C. Mesial to Distal
D. Buccal to Lingual
Correct Answer: B
Rationale: The oblique ridge on maxillary molars runs from the
distobuccal cusp to the mesiolingual cusp.
4
