Question 1

Ninety percent of all dentin exposure lesions occur at the cervical margin of the tooth.A localized lesion begins in the interproximal spaces.

Accepted Answer

The first statement is true as per dental literature, while the second statement is false as a localized lesion can begin at different parts of the tooth and not only in the interproximal spaces.

Question 2

Reduction of the rest potential or nerve membrane so that a nerve impulse is fired is known as

Accepted Answer

Reduction of the rest potential of the nerve membrane is known as neural depolarization, which leads to firing of a nerve impulse. Chemical stimuli may or may not cause depolarization, and evaporative stimuli are not typically associated with nerve function. Neural activity is a broad term that includes many different processes, including depolarization.

Question 3

Who is at the greatest risk for developing dentin hypersensitivity?

Accepted Answer

B

Question 4

Each of the following practices should be taken into consideration when making a treatment plan for a patient with dentin hypersensitivity EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

The other options (A, B, and C) are all related to factors that can contribute to dentin hypersensitivity and should be taken into consideration when creating a treatment plan. However, a high-caloric diet is not directly related to dentin hypersensitivity and would not typically be a factor in treatment planning for this condition.

Question 5

The layer of organic debris that covers dentin tubules and provides a layer of protection is called the _____layer.

Accepted Answer

The answer of The layer of organic debris that covers...

Question 6

Dentin hypersensitivity that is experienced shortly after periodontal therapy procedures,restorative procedures,and teeth bleaching is considered ______________.

Accepted Answer

The answer of Dentin hypersensitivity that is experienced shortly after...

Question 7

Which type of sensitivity is caused by dehydration?

Accepted Answer

Evaporative sensitivity is often caused by dehydration, which leads to a reduction in the protective saliva layer around the teeth, making them more susceptible to temperature changes and other external stimuli.

Question 8

What is the agent that causes nerve hyperpolarization?

Accepted Answer

KNO₃ (Potassium nitrate) is known to cause nerve hyperpolarization by increasing the potassium ion concentration outside the nerve cell, making it more negative relative to the inside.

Question 9

Each of the following techniques is used to treat dentin hypersensitivity EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

Tubule dehydration is not a technique used to treat dentin hypersensitivity. Instead, treatments focus on interrupting nerve transmission, occluding the tubules to prevent fluid movement that triggers pain, and using protein precipitants to block the tubules. Tubule dehydration would likely increase sensitivity by enhancing fluid movement within the tubules.

Question 10

Dentin hypersensitivity is caused when a physical stimulus is applied to exposed dentin tubules.Exposure of A-delta fibers is caused by disturbance of fluid creating a sharp pain sensation.

Accepted Answer

Both statements accurately describe the mechanism behind dentin hypersensitivity. The exposure of dentin tubules leads to fluid movement within these tubules when stimulated, which in turn activates A-delta fibers, causing a sharp pain sensation.

Question 11

A conservative course of treatment for dentin hypersensitivity is recommended because treatments are

Accepted Answer

The answer of A conservative course of treatment for dentin...

Question 12

Each of the following statements are true of A-delta fibers EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A-delta fibers are typically associated with mechanical and thermal stimuli, rather than electrical stimuli.

Question 13

Which factor can be a significant contributor to the development of dentin hypersensitivity?

Accepted Answer

The answer of Which factor can be a significant contributor...

Question 14

The treatment for dentin hypersensitivity that is best for long-term use and replaces the smear layer once applied is called __________.

Accepted Answer

The answer of The treatment for dentin hypersensitivity that is...

Question 15

Each of the following factors have an effect on the duration and severity of dentin hypersensitivity EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

While all the other factors listed have an effect on the duration and severity of dentin hypersensitivity, occlusion classification does not have a direct impact on this condition.

Question 16

Identify the teeth at risk for hypersensitivity in the order of greatest risk to least.

Accepted Answer

Canines and first premolars have the greatest risk for hypersensitivity due to their higher proportion of exposed dentin and thinner enamel layer. Incisors also have a high risk due to their prominent position in the oral cavity, while molars have the least risk because they have thicker enamel and are less likely to have exposed dentin.

Question 17

Calculus provides a soothing coating to the tooth to make it less sensitive.Calculus is the most highly calcified and hardest tissue in the body.

Accepted Answer

The first statement is true as calculus can be used to provide a coating that reduces tooth sensitivity. However, the second statement is false. While calculus is a hard tissue in the body, it is not the hardest. Enamel, which is also found in teeth, is actually the hardest tissue in the human body.

Question 18

When traditional therapeutic modalities are unsuccessful in the treatment of dentin hypersensitivity each of the following advanced treatments are acceptable options to control symptoms EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

Laser gingival curettage is not an accepted advanced treatment for dentin hypersensitivity. Complete occlusal adjustment, gingival grafting, and iontophoresis are all acceptable treatment options.

Question 19

Each of the following is a predisposing factor of dentin hypersensitivity EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

Presence of third molars is not a predisposing factor of dentin hypersensitivity. Thin gingival tissue, anatomical architecture of alveolar bone, and improper brushing technique can lead to exposure of dentin and subsequently cause sensitivity.

Question 20

Dental hygienists can intervene in the treatment of dentin hypersensitivity using all of the following methods EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

Applying an acidic agent and drying with air to the surface is not a recommended method for treating dentin hypersensitivity. This approach can actually harm the sensitive dentin by further exposing the dentinal tubules or causing additional enamel erosion, rather than alleviating the sensitivity.

Quiz 28: Management of Dentin Hypersensitivity