Special Tests

Question 1

What are the three different interactions of X-Rays?

Answer 1

1. Transmitted - passes through unaltered
2. Absorbed - stopped by the tissue
3. Scattered - changes direction

Question 2

What contributes to the attenuation of X-Ray photons?

Answer 2

Absorbed and scattered rays

Question 3

Define radiograph

Answer 3

represents pattern of attenuation of X-ray photons after they have passed through matter

Question 4

What is the difference between radiolucent and radiopaque?

Answer 4

Radiolucent - darker areas, less attenuation

Radiopaque - lighter areas, more attenuation

Question 5

How would caries be presented on a radiograph?

Answer 5

reduced radiodensity therefore appears radiolucent compared to rest of tooth

Question 6

Give examples of intra oral radiographs

Answer 6

Bitewing radiographs

Periapical radiographs

Occlusal radiographs

Question 7

Give examples of extra-oral radiographs

Answer 7

Panoramic radiograph

Lateral cephalogram

Question 8

Give an example of a cross-sectional radiograph

Answer 8

Cone beam computed tomograph

Question 9

What should you use to identify teeth on a radiograph?

Answer 9

• Crown morphology
• Root morphology
• Curve of spee
• Surrounding non-dental anatomy