NDEE 2026 Exam 2
Questions and Correct
Answers with Rationale
Guaranteed Pass
� Question 1
A 42-year-old patient complains of sensitivity to cold on the
cervical aspect of several teeth. Clinical examination reveals
gingival recession with exposed root surfaces but no carious
lesions. What is the most likely cause?
A. Acute pulpitis
B. Dentin hypersensitivity
C. Internal root resorption
D. Cracked tooth syndrome
� Correct Answer: B. Dentin hypersensitivity
� Rationale:
Exposure of dentinal tubules due to gingival recession
commonly causes sharp, short-lasting pain in response to cold,
touch, or air.
,� Question 2
Which salivary gland produces the largest volume of saliva
under normal resting conditions?
A. Parotid gland
B. Sublingual gland
C. Submandibular gland
D. Minor salivary glands
� Correct Answer: C. Submandibular gland
� Rationale:
The submandibular glands produce approximately 60–70% of
unstimulated saliva, while the parotid glands contribute most of
the stimulated salivary flow.
� Question 3
A periapical radiograph shows a round radiopaque mass fused to
the root of a mandibular molar and surrounded by a thin
radiolucent rim. What is the most likely diagnosis?
A. Cementoblastoma
B. Periapical granuloma
,C. Radicular cyst
D. Condensing osteitis
� Correct Answer: A. Cementoblastoma
� Rationale:
A cementoblastoma is a benign odontogenic tumor attached to
the tooth root and is characterized by a radiopaque mass with a
surrounding radiolucent halo.
� Question 4
Which nerve block anesthetizes the maxillary molars, excluding
the mesiobuccal root of the first molar in many patients?
A. Infraorbital nerve block
B. Posterior superior alveolar nerve block
C. Greater palatine nerve block
D. Nasopalatine nerve block
� Correct Answer: B. Posterior superior alveolar nerve
block
� Rationale:
The posterior superior alveolar (PSA) nerve block anesthetizes
, most maxillary molars. The mesiobuccal root of the first molar
is often supplied by the middle superior alveolar nerve.
� Question 5
Which microorganism is most strongly associated with
aggressive forms of periodontitis?
A. Aggregatibacter actinomycetemcomitans
B. Streptococcus mutans
C. Candida albicans
D. Lactobacillus acidophilus
� Correct Answer: A. Aggregatibacter
actinomycetemcomitans
� Rationale:
A. actinomycetemcomitans has a well-established association
with aggressive periodontitis, particularly localized disease in
younger individuals.
� Question 6
Questions and Correct
Answers with Rationale
Guaranteed Pass
� Question 1
A 42-year-old patient complains of sensitivity to cold on the
cervical aspect of several teeth. Clinical examination reveals
gingival recession with exposed root surfaces but no carious
lesions. What is the most likely cause?
A. Acute pulpitis
B. Dentin hypersensitivity
C. Internal root resorption
D. Cracked tooth syndrome
� Correct Answer: B. Dentin hypersensitivity
� Rationale:
Exposure of dentinal tubules due to gingival recession
commonly causes sharp, short-lasting pain in response to cold,
touch, or air.
,� Question 2
Which salivary gland produces the largest volume of saliva
under normal resting conditions?
A. Parotid gland
B. Sublingual gland
C. Submandibular gland
D. Minor salivary glands
� Correct Answer: C. Submandibular gland
� Rationale:
The submandibular glands produce approximately 60–70% of
unstimulated saliva, while the parotid glands contribute most of
the stimulated salivary flow.
� Question 3
A periapical radiograph shows a round radiopaque mass fused to
the root of a mandibular molar and surrounded by a thin
radiolucent rim. What is the most likely diagnosis?
A. Cementoblastoma
B. Periapical granuloma
,C. Radicular cyst
D. Condensing osteitis
� Correct Answer: A. Cementoblastoma
� Rationale:
A cementoblastoma is a benign odontogenic tumor attached to
the tooth root and is characterized by a radiopaque mass with a
surrounding radiolucent halo.
� Question 4
Which nerve block anesthetizes the maxillary molars, excluding
the mesiobuccal root of the first molar in many patients?
A. Infraorbital nerve block
B. Posterior superior alveolar nerve block
C. Greater palatine nerve block
D. Nasopalatine nerve block
� Correct Answer: B. Posterior superior alveolar nerve
block
� Rationale:
The posterior superior alveolar (PSA) nerve block anesthetizes
, most maxillary molars. The mesiobuccal root of the first molar
is often supplied by the middle superior alveolar nerve.
� Question 5
Which microorganism is most strongly associated with
aggressive forms of periodontitis?
A. Aggregatibacter actinomycetemcomitans
B. Streptococcus mutans
C. Candida albicans
D. Lactobacillus acidophilus
� Correct Answer: A. Aggregatibacter
actinomycetemcomitans
� Rationale:
A. actinomycetemcomitans has a well-established association
with aggressive periodontitis, particularly localized disease in
younger individuals.
� Question 6
