Perio chap 20: Radiographic Analysis of the Periodontium

An example of a radiolucent area on a radiograph is the:

• periodontal ligament space

• tooth enamel

• bone levels

• overhanging restoration

The structure that forms a smooth, intact surface between adjacent teeth with only the width of the periodontal ligament space separating it from the adjacent root surface is called the:

• crestal bone contour

• alveolar crest

• cortical bone

• horizontal crest contour

If an adjacent tooth is tilted or erupted to a different height, the crest of the interproximal bone will have a ______ contour.

• horizontal

• vertical

• jagged

• smooth

The continuous white line around the tooth root as seen on radiographs is referred to as the:

• alveolar crest

• periodontal ligament space

• lamina dura

• cementum

Which of the following techniques creates the most anatomically accurate image when exposing radiographs?

• Short-cone parallel technique

• Bisect angle technique

• Long-cone parallel technique

• Square-cone bisecting technique

Radiographs usually show more interradicular bone between roots of the teeth than what is actually present. Facial and lingual bones can be superimposed over a furcation.

• Both statements are true.

• Both statements are false.

• The first statement is true; the second is false.

• The first statement is false; the second is true.

Which of the following statements is true about viewing periodontal pockets on radiographs?

• A. A periodontal pocket is not visible on radiographs.

• B. A periodontal pocket appears radiolucent on radiographs.

• C. A periodontal pocket appears radiopaque on radiographs.

• D. A periodontal pocket is less deep than it appears on a radiograph.

All of the following statements are true about viewing bone loss on radiographs, except: A. By the time bone loss is detectable on radiographs, it has usually progressed past the early stage. B. Radiographs do not always reveal the presence of alveolar bone loss in furcation areas. C. Facial and lingual bone height is difficult to evaluate because teeth are superimposed on bone. D. A radiograph can accurately display the shape and depth of bone deformities.

• By the time bone loss is detectable on radiographs, it has usually progressed past the early stage.

• Radiographs do not always reveal the presence of alveolar bone loss in furcation areas.

• Facial and lingual bone height is difficult to evaluate because teeth are superimposed on bone.

• A radiograph can accurately display the shape and depth of bone deformities.

Tags

NGSS.HS-PS4-3

Radiographs can reveal all of the following periodontal conditions, except:

• Widening of the periodontal ligament space.

• Advanced furcation involvement.

• Overhanging restorations.

• Early bone loss.

Radiographs reveal the bone remaining rather than the amount of bone lost. The amount of bone loss can be roughly estimated on a radiograph as the difference between the level of the remaining bone and normal bone height.

• Both statements are true.

• Both statements are false.

• The first statement is true; the second is false.

• The first statement is false; the second is true.