FREE NBDE MCQ Questions and Answers

Question 1

Which field of the dentistry is defined as the science and art of preventing and controlling detank diseases and promoting dental health through organized community efforts?

Accepted Answer

Dental Public Health

Answer

Pediatric Dentistry

Answer

Prosthodontics

Answer

Endodontics

Answer

Periodontics

Question 2

An 11-year-old girl presents with a maxillary midline diastema of less than 2mm. The patient's mother is concerned about her appearance and asks you to close the space. What is the appropriate management in this situation?

Accepted Answer

Reassure the mother and wait for the maxillary canines to erupt

Answer

Close the space with an orthodontic appliance

Answer

Close the space with 5 surface composite fillings

Answer

Investigate further to determine cause of the diastema

Question 3

An 85-year-old petite female presents for her recall appointment. She notes that her husband of 55 years died 6 months ago. Since then, she notes she has lost 15 pounds and is having difficulty with decreased appetite. What is the most appropriate step should you take yo aid this patient?

Accepted Answer

Refer her to her family physician for a more in-depth check-up

Answer

Recommend adding liquid nutritional beverages to her diet

Answer

Refer her to a registered dietician

Answer

Congratulate her on her weight loss

Answer

Give her a copy of the national food guide to healthy eating

Question 4

To diagnose periodontal disease, the most important factor is:

Accepted Answer

Attachment loss

Answer

The presence of bleeding on probing

Answer

The vitality of the teeth

Answer

The presence of pain on probing

Answer

The mobility of the teeth

Question 5

Which stage of necrotizing ulcerative gingivitis occurs first?

Accepted Answer

The tip of the interdental papilla is affected

Answer

The ulceration extends from the tip of the interdental papilla to the marginal gingival

Answer

The bone is exposed

Answer

The attached gingiva is affected

Answer

Necrosis appears on the cheek

Question 6

Which disease is characterized by necrosis of the marginal gingival tissue and interdental papillae?

Accepted Answer

Necrotizing periodontal disease

Answer

Chronic periodontal disease

Answer

Aggressive periodontal disease

Answer

Abscesses of the periodontium

Answer

None of the above

Question 7

An acute apical periodontitis would present as:

Accepted Answer

A tooth that feels “long” and extremely painful on biting

Answer

An incidental finding on an asymptomatic tooth

Answer

A tooth that is mildly painful on biting

Answer

A painful gingival swelling absent of tooth findings

Question 8

Which of the following antihypertensives is known to cause gingival hyperplasia in patients?

Accepted Answer

Calcium channel blockers

Answer

Alpha-adrenergic receptor blockers

Answer

ACE inhibitors

Answer

ATII receptor antagonists

Answer

Beta-adrenergic receptor blockers

Question 9

Which of the following drugs is most likely to result in decreased metabolism of opioids that undergo hepatic metabolism?

Accepted Answer

Diltiazem

Answer

Carbamazepine

Answer

Phenytoin

Answer

St. John’s wort

Answer

Rifampicin

Question 10

A 22-year-old patient with an unrepaired cyanotic congenical heart defect is scheduled for a routine teeth cleaning. The patient is allergc to penicillins. Which of the following should be done with regards to this patient prior to their dental procedure?

Accepted Answer

Administer oral prophylactic clindamycin

Answer

Administer oral prophylactic amoxicillin

Answer

Administer intravenous prophylactic cefazolin

Answer

Administer intravenous prophylactic ampicillin

Answer

Administer intravenous prophylactic clindamycin

Answer

Prophylaxis is not necessary in this patient