Deck 21: Caries and Periodontal Disease

Question 1

The periodontal ligament fibers because they are soft tissue are seen on radiographs,but the space the fibers occupy is seen and referred to as the periodontal ligament space.

A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Answer 1

First statement is false,second is true.

Question 2

Teeth with short conical roots and bone loss have a very good prognosis.

Answer 2

False

Question 3

The height of alveolar bone is best evaluated on periapical films taken by the paralleling method.

Answer 3

True

Question 4

Information on all of the following can only be obtained through radiographic examination EXCEPT one.Which one is the EXCEPTION?

A)Root caries
B)Size of roots
C)Shape of roots
D)Bone level of teeth

Question 5

Identify the teeth most often demonstrating cervical burnout:

A)all anterior teeth.
B)all posterior teeth.
C)mandibular incisors and molars.
D)maxillary canines and premolars.

Question 6

A radiolucent shadow under a metallic restoration may indicate what?

A)Abrasion
B)Cervical burnout
C)Periodontal disease
D)Previous indirect pulp capping

Question 7

Identify the most common reason for exposing dental radiographs:

A)to detect caries.
B)to locate impacted teeth.
C)to confirm suspected pathology.
D)to confirm the presence of periodontal disease.

Question 8

Caries that radiographically involve the dentin are classified as:

A)late.
B)early.
C)incipient.
D)advanced.

Question 9

Identify the best way to detect occlusal caries:

A)occlusal radiographs.
B)bitewing radiographs.
C)clinical exam with mouth mirror and explorer.
D)periapical films utilizing bisecting angle technique.

Question 10

All of the following are etiologic factors for periodontal disease that can be seen on radiographs EXCEPT one.Which one is the EXCEPTION?

A)Plaque
B)Calculus
C)Open contacts
D)Overcontoured restorations

Question 11

The normal crest of interproximal bone is:

A)at the cervical line.
B)about 5 mm apical to the cementoenamel junction.
C)about 3 mm apical the cementoenamel junction.
D)about 1 to 1.5 mm apical to the cementoenamel junction.

Question 12

Interproximal caries is best seen on:

A)occlusal radiographs.
B)bitewing radiographs.
C)panoramic radiographs.
D)periapical films utilizing bisecting angle technique.

Question 13

All of the following conditions resemble radiographic dental caries EXCEPT one.Which one is the EXCEPTION?

A)Attrition
B)Abrasion
C)Cervical burnout
D)Amalgam overhang

Question 14

Once occlusal caries has reached the DEJ,it can appear radiographically as:

A)triangular shape.
B)rectangular shape.
C)horizontal radiolucent line.
D)horizontal radiopaque line.

Question 15

Cement bases under restorations appear radiopaque on a radiograph.

Question 16

An example of caries that is almost never seen on radiographs is:

A)incisal.
B)lingual.
C)occlusal.
D)interproximal.

Question 17

The proper diagnosis and evaluation of periodontal disease can be made solely with the use of radiographs.

Question 18

Caries that has penetrated halfway through the enamel surface is termed:

A)severe.
B)incipient.
C)moderate.
D)advanced.

Question 19

Radiographically when caries reaches the dentinoenamel junction,and it appears as a vertical horizontal line.

Question 20

Bitewing radiographs that have incorrect horizontal angulations will make interproximal caries detection:

A)easier.
B)difficult.
C)almost impossible.
D)None are correct.