NDEB EXAM 300 QUESTIONS CORRECT

NDEB EXAM 300+ QUESTIONS & CORRECT

ANSWERS LATEST 2025

The absence of a pulp chamber in a deciduous maxillary incisor is most likely due to

• amelogenesis imperfecta.
• hypophosphatasia.
• trauma.
• ectodermal dysplasia.
• cleidocranial dysostosis. - ANSWER-C. trauma.

The anticariogenic effect of systemic fluoride is related principally to the

• bactericidal action on oral flora.
• bacteriostatic action on oral flora.
• buffering effect on acids produced by

cariogenic bacteria.

• alteration in the composition of the enamel. - ANSWER-D. alteration in the

composition of the enamel.

When making an indirect wax pattern on a stone die, improved adaptation will result from

• the use of a separating medium.
• soaking the die in cold water. 1 / 4

• burnishing the wax to the die.
• melting the wax onto the die - ANSWER-A. the use of a separating medium.

Which of the following clinical conditions is the most serious?

• Acute apical abscess of a mandibular central

incisor.

• Mid facial cellulitis.
• Chronic apical abscess of a mandibular third

molar.

• Infected dentigerous cyst. - ANSWER-B. Mid facial cellulitis.

A 43 year old patient with a history of severe asthma and nasal polyps has an emergency pulpotomy.Assuming daily recommended doses are followed, which of the following is the most appropriate drug management?

• Acetaminophen 650 mg every 4 hours.
• Naproxen 250 mg every 6-8 hours.
• Ketorolac 10 mg every 4 hours.
• Acetylsalicylic acid 650 mg every 4 hours. - ANSWER-A. Acetaminophen 650

mg every 4 hours.

Gold alloy can be given a white colour by introducing sufficient

• zinc. 2 / 4

• copper.
• cadmium.
• palladium. - ANSWER-D. palladium.

In addition to iron, calcium and folate, which of the following nutrients is of special concern during pregnancy?

• Vitamin B12.
• Pyridoxine.
• Vitamin D.
• Ascorbic acid. - ANSWER-A. Vitamin B12.

In an acute apical abscess (acute periapical abscess), which of the following teeth is most likely to spread infection to the submandibular space?

• Mandibular second bicuspid.
• Maxillary third molar.
• Mandibular first molar.
• Mandibular third molar.
• Mandibular lateral incisor - ANSWER-D. Mandibular third molar.

A 78 year old patient presents for the extraction of a symptomatic carious erupted tooth 1.8. Upon elevation, a loud cracking sound is heard and excessive mobility is noted. Upon palpation, 2/3 of 3 / 4

the tuberosity is involved. What is the most appropriate next step?

• Continue with extraction and remove tooth and

bone with forceps, then suture to stabilize.

• Discontinue extraction, splint tooth and wait 6

to 8 weeks to extract surgically.

• Remove bone from the tooth without separating

it from soft tissue, then suture to stabilize.

• Perform a surgical extraction immediately with

full thickness flap to visualize tooth and bone, then suture to stabilize. - ANSWER-B. Discontinue extraction, splint tooth and wait 6 to 8 weeks to extract surgically.

Ideal orthodontic tooth movement involves

• large forces.
• undermining resorption.
• frontal resorption.
• subcrestal incisions - ANSWER-C. frontal resorption.

The most frequent cause of malocclusion is

• thumbsucking.
• mouth breathing.
• heredity.
• ectopic eruption. - ANSWER-C. heredity.

Coxibs are more appropriate than standard NSAIDs

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