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Flashcards in Chapter 31 Deck (17)
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Ala

The winged flare of the nostril

1

Bisecting angle technique

Method of exposing radiographs in which the position indicating device (PID) and X-ray beam are directed perpendicular (at 90 degrees) to an imaginary line that equally bisects a triangle created by the long axis of the tooth and the film

2

Bitewing radiograph

Radiograph used primarily to examine the interproximal surfaces of the teeth

3

Cone cut

An error created when only part of an image is seen on a radiograph due to improper alignment of the PID with the film

4

Elongation

A vertical angular ion error that occurs when there is insufficient vertical angular ion of the PID to the film

5

Foreshortening

A vertical angulation error that occurs when there is excessive vertical angulation of the PID to the film

6

Horizontal angulation

Proper alignment of the PID in a side to side or back and forth direction

7

Interproximal

Between two adjacent surfaces next to each other in the same arch

8

Long axis of the tooth

An imaginary line passing vertically , or lengthwise, through the tooth that divides the tooth in half

9

Overlapping

A horizontal angulation error that occurs when the X-ray beam is not at 90 degrees to the tooth and film, and images from adjacent structures are superimposed on top of each other

10

Paralleling technique

Method of exposing periapical radiographs in which the long axis of the took and the film are situated parallel with each other and the PID is directed at the center of the film and tooth at a 90 degree angle, or perpendicular , as directed by the locator ring

11

Periapical radiograph

Radiograph that shows the desired teeth and the surrounding areas including the apices

12

Perpendicular

Intersecting at or forming a right angle, or a 90 degree angle, to the tooth and film packet , creating a corner (the opposite of parallel )

13

Position indicating device(PID)

A cylinder (or cone) affixed to the tube head that is used to align the X-ray with the film in the patients mouth

14

Radiograph

A one dimensional view of three dimensional subject, the patient ; also known as X-ray or film

15

Tragus

The prominence of tissue located toward the middle opening of ear

16

Vertical angulation

Proper alignment of the PID in a up and down direction