Free NBDHE Dental Hygiene Trivia Question and Answers

Question 1

Which of the following is true about a root's hypersensitivity decreasing as the tooth develops?

Accepted Answer

Cellular cementum

Answer

Root hypersensitivity is typically caused by exposed dentin tubules. As a tooth matures and in response to stimuli like recession, cellular cementum can be deposited over the exposed dentin surface. This layer of cementum acts as a protective barrier, occluding the dentin tubules and thereby reducing or eliminating the sensitivity to external stimuli.

Question 2

Which nerve supplies the intrinsic tongue muscles?

Accepted Answer

Hypoglossal

Answer

The Hypoglossal nerve (Cranial Nerve XII) is primarily a motor nerve that controls the movements of the tongue. It provides motor innervation to all the intrinsic muscles of the tongue, which are responsible for changing the tongue's shape, and most of the extrinsic muscles, which move the tongue. Dysfunction of this nerve would impair tongue movement.

Question 3

All of the above methods, with the exception of ____________, are frequently used to introduce fluoride.

Accepted Answer

Injection

Answer

Fluoride is commonly introduced to prevent dental caries through various methods, including topical applications like toothpaste and mouthwash, and systemic ingestion via fluoridated drinking water or dietary supplements. However, fluoride is not administered by injection for the purpose of preventing dental caries. Injection is not a standard or effective method for delivering fluoride to the tooth surface for caries prevention.

Question 4

When gingivitis is considered to be under control

Accepted Answer

there's no bleeding around the gums

Answer

Gingivitis is an inflammatory condition of the gums, and one of its hallmark clinical signs is bleeding upon probing or brushing. When gingivitis is successfully brought under control, the inflammation resolves, and the gum tissues become healthy, firm, and no longer bleed easily. Therefore, the absence of bleeding around the gums is a key indicator that the gingivitis is under control and the periodontal health has improved.

Question 5

The purpose of radiographic enhancing screens is

Accepted Answer

reducing the patient dose

Answer

Radiographic enhancing screens contain phosphors that convert X-ray energy into visible light, which then exposes the film. This process significantly amplifies the effect of the X-rays, meaning less radiation is needed to produce a diagnostic image. By requiring a lower dose of X-rays, these screens effectively reduce the patient's exposure to radiation.

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Free NBDHE Dental Hygiene Trivia Question and Answers