Question 1

Caries that involve the buccal or lingual surface appear as a small, ____ areA.&#10;A) Triangular radiolucent&#10;B) Circular radiolucent&#10;C) Triangular radiopaque&#10;D) Circular radiopaque

Accepted Answer

Caries on the buccal or lingual surfaces typically appear as a small, circular radiolucent area on radiographs.

Question 2

A radiograph is most useful for detection of ____ caries.&#10;A) Buccal&#10;B) Lingual&#10;C) Occlusal&#10;D) Interproximal

Accepted Answer

Interproximal caries are located between teeth and cannot be visualized clinically, making radiographs the most useful tool for detection. Buccal, lingual, and occlusal caries can often be detected clinically through visual or tactile examination.

Question 3

____ occlusal caries cannot be seen on a dental radiograph and must be detected clinically with an explorer. (1) Incipient
(2) Moderate
(3) Severe

A) 1, 2, 3
B) 1, 3
C) 2, 3
D) 1 only

1 only

Accepted Answer

The statement specifically mentions "cannot be seen on a dental radiograph" and refers to caries that are only detectable with an explorer. Therefore, only incipient occlusal caries fits this description and can be detected clinically via an explorer. Moderate and severe occlusal caries are typically visible on radiographs.

Question 4

In the practice of dentistry, ____ is probably the most frequent reason for taking dental radiographs.&#10;A) Periodontitis&#10;B) Caries&#10;C) Impacted teeth&#10;D) Orthodontia

Accepted Answer

Caries, also known as tooth decay, is the most common reason for taking dental radiographs. X-rays can help detect decay that may not be visible to the naked eye, especially in between teeth. Other reasons for taking dental radiographs include evaluating the health of the jawbone, detecting oral pathology, and planning for orthodontic treatment.

Question 5

A carious lesion appears ____ on a dental radiograph.&#10;A) Radiopaque&#10;B) Radiolucent&#10;C) White&#10;D) Clear

Accepted Answer

A carious lesion appears radiolucent on a dental radiograph because it represents loss of mineral density in the tooth structure, allowing more X-rays to pass through and creating a dark area on the radiograph. Radiopaque means a structure appears white on a radiograph due to high mineral density, which is not characteristic of a carious lesion. "White" and "clear" are not accurate descriptions of a carious lesion on a radiograph.

Question 6

On a dental radiograph, interproximal caries are typically seen at or just below the:&#10;A) Marginal ridge.&#10;B) Contact point.&#10;C) Cementoenamel junction.&#10;D) Crest of the alveolar bone.

Accepted Answer

Interproximal caries are typically seen at or just below the contact point, where the teeth come into contact with each other. This area is prone to decay because it is difficult to clean with brushing and flossing.

Question 7

____ caries are found between two teeth.&#10;A) Occlusal&#10;B) Buccal&#10;C) Lingual&#10;D) Interproximal

Accepted Answer

Interproximal caries are cavities that occur between two teeth, where they touch each other. Occlusal caries occur on the biting surface of a tooth, while buccal and lingual caries occur on the cheek or tongue side of a tooth.

Question 8

Which of the following statements is true of root surface caries?&#10;A) Root surface caries involve the loss of enamel.&#10;B) Root surface caries are clinically difficult to detect on exposed root surfaces.&#10;C) Root surface caries appear as a cupped-out or crater-shaped radiolucency just below the cementoenamel junction (CEJ).&#10;D) Root surface caries appear as a cupped-out or crater-shaped radiolucency just above the CEJ.

Accepted Answer

Root surface caries typically appear as a cupped-out or crater-shaped radiolucency just below the cementoenamel junction (CEJ) on dental radiographs.

Question 9

A Class ____ lesion is an advanced interproximal lesion.&#10;A) I&#10;B) II&#10;C) III&#10;D) IV

Accepted Answer

A Class III lesion refers to an advanced interproximal lesion that has reached the dentin, but not yet involved the pulp. Class I and Class II lesions are less advanced, with Class I being the earliest and affecting only the enamel, while Class II involves the enamel and reaches the dentin but does not extend through it. Class IV lesions are the most advanced, involving the pulp and requiring root canal therapy.

Question 10

____ interproximal caries extend less than halfway through the thickness of enamel.&#10;A) Incipient&#10;B) Moderate&#10;C) Advanced&#10;D) Severe

Accepted Answer

Incipient interproximal caries are the earliest form of caries and extend less than halfway through the thickness of enamel. Moderate, advanced, and severe caries extend deeper into the tooth structure and are more extensive.

Question 11

Rampant caries are typically seen in children with ____ dietary habits or in adults with ____ salivary flow.&#10;A) Poor; increased&#10;B) Poor; decreased&#10;C) Good; increased&#10;D) Good; decreased

Accepted Answer

The answer of Rampant caries are typically seen in children...

Question 12

The ____ radiograph is the radiograph of choice for the evaluation of caries.&#10;A) Periapical&#10;B) Bite-wing&#10;C) Panoramic&#10;D) Occlusal

Accepted Answer

The answer of The ____ radiograph is the radiograph of...

Deck 33: Interpretation of Dental Caries