Intraoral Technique 1

Question 1

What are technique for periapical X-ray?

Answer 1

Paralleling technique

Bisected angle technique

Question 2

Describe positioning of film to tooth and beam to film

Answer 2

Film parallel to tooth

Beam perpendicular to film/ tooth

Question 3

What are advantages of paralleling technique

Answer 3

Reduces dose
Does not expose fingers
Allows accurate geometry
Holders facilitate positioning

Question 4

What are the holders made up of?

Answer 4

Bite block
Indicator arm
Aiming ring

Question 5

How should film be positioned?

Answer 5

Vertical place parallel to long axis of tooth
Horizontal place parallel to horizontal plane of teeth
Prevents cross over

Question 6

If beam angled from below what is the effect on image?

Answer 6

Elongated

Question 7

If beam is angled from above what can happen to image?

Answer 7

Fore shortened image

Question 8

Increasing the distance between X-ray source and film has what effect on magnification?

Answer 8

Minimises

Question 9

Decreasing the distance between film and tooth has want effect on magnification?

Answer 9

Minimises magnification

Question 10

What position should the dot be in for peri apicals?

Answer 10

To the crown of the teeth

Question 11

What position should the dot be in for bite wings?

Answer 11

Dot to the palate

Question 12

When is a periapical indicated?

Answer 12

Detect apical inflammation
Assess periodontal problems
Trauma/ fracture to tooth 
Tooth morphology re. XLA
Endo
Presence of unerupted teeth 
Evaluation of implants