panoramic (OPT)

Question 1

what do you see in a panoramic radiograph?

Answer 1

The most common extra-oral radiograph in dentistry

Designed to provide a clear view of the entire maxilla and mandibular region
Create an orthogonal view of the teeth
tmj
maxillary sinuses

Question 2

how does a panoramic radiograph work?

Answer 2

Controlled rotation of X-ray source & receptor around head during exposure

Question 3

what is the exposure technique for a panoramic radiograph and how long does it take?

Answer 3

exposed from one side to the other takes 14 seconds

Question 4

what is the Linear tomography technique?

Answer 4

X-ray source moves in one direction while receptor moves in opposite direction

Question 5

what is an advantage and a disadvantage of a panoramic radiograph?

Answer 5

adv- Improves angulation to more accurately represent interdental periodontal bone levels

dis- higher dose of radiation

Question 6

what is the differences between panoramic radiograph and a periapical advantages and disadvantages

Answer 6

adv panoramic (OPT) Can capture entire dentition in one image

can capture other structures eg maxillary sinuses ,TMJ

Lack of intra-oral holders benefits some patients
* e.g. gaggers, trauma cases, young children

dis- longer exposure time
increases risk of patient moving

higher radiation exposure 5x more

Question 7

what are the main components to a panoramic machine?

Answer 7

• X-ray tubehead
• Receptor (usually digital)
• Control panel
• Patient-positioning apparatus

Question 8

during a panoramic radiograph a patient must?

Answer 8

stay still
press tongue against palate
not talk or swallow