NDEB EXAM LATEST 2026 PACKAGE DEAL|
NATIONAL DENTAL EXAMINATION BOARD
(CANADIAN) EXAMS WITH COMPLETE ACTUAL EXAM,
STUDY GUIDE AND PRACTICE QUESTIONS WITH
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+|| BRAND NEW!!
Question 1
A 45-year-old patient presents with a 3 mm × 3 mm cavitated
lesion on the occlusal surface of tooth 3.6. The lesion is clinically
soft, and the patient reports occasional sensitivity to cold.
Radiographs show radiolucency confined to enamel. What is the
most appropriate treatment?
A) Fluoride varnish application and recall in 6 months
B) Preventive resin restoration
C) Amalgam restoration
D) Full coverage crown
1
,Correct Answer: B
Rationale: A cavitated lesion confined to enamel indicates an
initial carious lesion that has progressed through enamel but not
into dentin. A preventive resin restoration (sealant with minimal
preparation) is the most conservative treatment that removes only
carious tissue while preserving healthy tooth structure . Fluoride
varnish alone is insufficient for cavitated lesions.
Question 2
Which of the following is the most common cause of post-
operative sensitivity following a Class I amalgam restoration?
A) Overcarved anatomy
B) Incomplete caries removal
C) High restoration (occlusal interference)
D) Secondary caries
2
,Correct Answer: C
Rationale: A high restoration creates an occlusal interference,
subjecting the tooth to excessive occlusal forces that can cause
micro-movement of the restoration and transmit forces to the
pulp. This is the most common cause of post-operative sensitivity
following amalgam placement.
Question 3
During cavity preparation for a Class II amalgam restoration,
what is the purpose of placing a bevel on the cavosurface
margin?
A) To increase retention
B) To protect the enamel rods from fracture
C) To remove unsupported enamel
D) To improve marginal seal
3
, Correct Answer: B
Rationale: Beveling the cavosurface margin supports the enamel
rods and reduces the risk of marginal fracture. Amalgam is
brittle and can fracture at unsupported enamel margins.
Question 4
A patient presents with a fractured porcelain-fused-to-metal
crown on tooth 1.6. Radiographic examination shows adequate
remaining tooth structure and no caries. The patient has no
symptoms. What is the most appropriate management?
A) Extract the tooth
B) Place a new PFM crown
C) Repair the fractured porcelain with composite resin
D) Place an all-ceramic crown
Correct Answer: C
Rationale: For a patient without symptoms, repairing the
4
NATIONAL DENTAL EXAMINATION BOARD
(CANADIAN) EXAMS WITH COMPLETE ACTUAL EXAM,
STUDY GUIDE AND PRACTICE QUESTIONS WITH
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+|| BRAND NEW!!
Question 1
A 45-year-old patient presents with a 3 mm × 3 mm cavitated
lesion on the occlusal surface of tooth 3.6. The lesion is clinically
soft, and the patient reports occasional sensitivity to cold.
Radiographs show radiolucency confined to enamel. What is the
most appropriate treatment?
A) Fluoride varnish application and recall in 6 months
B) Preventive resin restoration
C) Amalgam restoration
D) Full coverage crown
1
,Correct Answer: B
Rationale: A cavitated lesion confined to enamel indicates an
initial carious lesion that has progressed through enamel but not
into dentin. A preventive resin restoration (sealant with minimal
preparation) is the most conservative treatment that removes only
carious tissue while preserving healthy tooth structure . Fluoride
varnish alone is insufficient for cavitated lesions.
Question 2
Which of the following is the most common cause of post-
operative sensitivity following a Class I amalgam restoration?
A) Overcarved anatomy
B) Incomplete caries removal
C) High restoration (occlusal interference)
D) Secondary caries
2
,Correct Answer: C
Rationale: A high restoration creates an occlusal interference,
subjecting the tooth to excessive occlusal forces that can cause
micro-movement of the restoration and transmit forces to the
pulp. This is the most common cause of post-operative sensitivity
following amalgam placement.
Question 3
During cavity preparation for a Class II amalgam restoration,
what is the purpose of placing a bevel on the cavosurface
margin?
A) To increase retention
B) To protect the enamel rods from fracture
C) To remove unsupported enamel
D) To improve marginal seal
3
, Correct Answer: B
Rationale: Beveling the cavosurface margin supports the enamel
rods and reduces the risk of marginal fracture. Amalgam is
brittle and can fracture at unsupported enamel margins.
Question 4
A patient presents with a fractured porcelain-fused-to-metal
crown on tooth 1.6. Radiographic examination shows adequate
remaining tooth structure and no caries. The patient has no
symptoms. What is the most appropriate management?
A) Extract the tooth
B) Place a new PFM crown
C) Repair the fractured porcelain with composite resin
D) Place an all-ceramic crown
Correct Answer: C
Rationale: For a patient without symptoms, repairing the
4
