EFDA EXAM AND PRACTICE EXAM
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EXAM QUESTIONS AND CORRECT
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SECTION 1: Dental Anatomy & Tooth Morphology
(Questions 1-30)
Question 1: How many molars are present in the mandibular arch?
A. 4
B. 6
C. 8
D. 10
Answer: B
Rationale: The mandibular arch contains 6 permanent molars: first, second, and third
molars on the left and right sides (3 on each side) .
,Question 2: The permanent mandibular second molar differs from the permanent
mandibular first molar by the number of:
A. Roots
B. Cusps
C. Developmental grooves
D. Pulp canals
Answer: B
Rationale: The mandibular first molar typically has 5 cusps, while the mandibular second
molar usually has 4 cusps .
Question 3: Which of the following is NOT found on the occlusal surface of a
mandibular molar?
A. Central fossa
B. Triangular ridge
C. Cingulum
D. Marginal ridge
Answer: C
Rationale: The cingulum is a raised area on the lingual surface of anterior teeth, not
found on posterior teeth .
Question 4: A cusp of Carabelli is located on a maxillary first molar of the:
A. Mesiobuccal cusp
B. Distobuccal cusp
C. Mesiolingual cusp
D. Distolingual cusp
Answer: C
,Rationale: The cusp of Carabelli is an accessory cusp located on the mesiolingual cusp of
maxillary first molars .
Question 5: The tooth that has the most acute or sharp mesial incisal angle is the:
A. Maxillary central incisor
B. Maxillary lateral incisor
C. Mandibular central incisor
D. Mandibular lateral incisor
Answer: A
Rationale: Maxillary central incisors have a sharp, acute mesial incisal angle, while the
distal angle is more rounded .
Question 6: FDI #38 corresponds to which universal tooth number?
A. #16
B. #17
C. #18
D. #32
Answer: B
Rationale: FDI #38 is the mandibular left third molar, which is universal #17 .
Question 7: The permanent mandibular first molars are NOT identified by which ridge?
A. Transverse ridge
B. Oblique ridge
C. Triangular ridge
, D. Marginal ridge
Answer: B
Rationale: The oblique ridge is characteristic of maxillary molars, not mandibular molars .
Question 8: What is the basic difference between canines and incisors?
A. Number of roots
B. Cusp tips
C. Length of crown
D. Facial contour
Answer: B
Rationale: Canines have a single, well-developed cusp tip, while incisors have a flat
incisal edge rather than a cusp .
Question 9: The enamel is thickest at the incisal third, causing it to appear:
A. More opaque
B. More translucent
C. Darker
D. Yellow
Answer: B
Rationale: Thicker enamel at the incisal third allows more light transmission, creating a
translucent appearance .
Question 10: The floor of a Class V restoration that runs vertically along the long axis of
the tooth is called the:
NEWEST 2026 TEST BANK| EFDA EXAM
REVIEW WITH COMPLETE 400 REAL
EXAM QUESTIONS AND CORRECT
VERIFIED ANSWERS/ ALREADY GRADED
A+ (MOST RECENT!!)
SECTION 1: Dental Anatomy & Tooth Morphology
(Questions 1-30)
Question 1: How many molars are present in the mandibular arch?
A. 4
B. 6
C. 8
D. 10
Answer: B
Rationale: The mandibular arch contains 6 permanent molars: first, second, and third
molars on the left and right sides (3 on each side) .
,Question 2: The permanent mandibular second molar differs from the permanent
mandibular first molar by the number of:
A. Roots
B. Cusps
C. Developmental grooves
D. Pulp canals
Answer: B
Rationale: The mandibular first molar typically has 5 cusps, while the mandibular second
molar usually has 4 cusps .
Question 3: Which of the following is NOT found on the occlusal surface of a
mandibular molar?
A. Central fossa
B. Triangular ridge
C. Cingulum
D. Marginal ridge
Answer: C
Rationale: The cingulum is a raised area on the lingual surface of anterior teeth, not
found on posterior teeth .
Question 4: A cusp of Carabelli is located on a maxillary first molar of the:
A. Mesiobuccal cusp
B. Distobuccal cusp
C. Mesiolingual cusp
D. Distolingual cusp
Answer: C
,Rationale: The cusp of Carabelli is an accessory cusp located on the mesiolingual cusp of
maxillary first molars .
Question 5: The tooth that has the most acute or sharp mesial incisal angle is the:
A. Maxillary central incisor
B. Maxillary lateral incisor
C. Mandibular central incisor
D. Mandibular lateral incisor
Answer: A
Rationale: Maxillary central incisors have a sharp, acute mesial incisal angle, while the
distal angle is more rounded .
Question 6: FDI #38 corresponds to which universal tooth number?
A. #16
B. #17
C. #18
D. #32
Answer: B
Rationale: FDI #38 is the mandibular left third molar, which is universal #17 .
Question 7: The permanent mandibular first molars are NOT identified by which ridge?
A. Transverse ridge
B. Oblique ridge
C. Triangular ridge
, D. Marginal ridge
Answer: B
Rationale: The oblique ridge is characteristic of maxillary molars, not mandibular molars .
Question 8: What is the basic difference between canines and incisors?
A. Number of roots
B. Cusp tips
C. Length of crown
D. Facial contour
Answer: B
Rationale: Canines have a single, well-developed cusp tip, while incisors have a flat
incisal edge rather than a cusp .
Question 9: The enamel is thickest at the incisal third, causing it to appear:
A. More opaque
B. More translucent
C. Darker
D. Yellow
Answer: B
Rationale: Thicker enamel at the incisal third allows more light transmission, creating a
translucent appearance .
Question 10: The floor of a Class V restoration that runs vertically along the long axis of
the tooth is called the:
