Radiographic Techniques

Question 1

What are the 3 types of intra-oral radiographic techniques?

Answer 1

1. Periapicals
2. Bitewings - Horizontal and vertical
3. Oclussal - maxilla and mandible

Question 2

What are the 5 types of extra-oral radiographs?

Answer 2

1. DPT
2. Lateral cephalogram
3. Postero-anterior Mandible
4. Lateral oblique mandible
5. Occipito-mental views of facial bones

Question 3

Why would you take a periapical?

Answer 3

1. Detect apical inflammation/infection to include cystic changes
2. Assess periodontal problems
3. Trauma: fractures to tooth and/or surrounding bone
4. Presence/position of unerupted teeth
5. Endodontics
6. Pre/post apical surgery
7. Evaluation of implants

Question 4

What are the 2 radiographic techniques?

Answer 4

1. Paralleling technique

2. Bisected angle technique

Question 5

What does the paralleling technique use to facilitate positioning?

Answer 5

Uses holders

Question 6

Where does the receptor sit in relation to the tooth in a paralleling technique?

Answer 6

The receptor sits parallel to the tooth

Question 7

Where does the xray beam sit in a paralleling technique?

Answer 7

Perpendicular to the tooth/receptor

Question 8

What does the paralleling technique minimise?

Answer 8

Magnification