Chapter 31

Question 0

Bisecting angle technique

Answer 0

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

Question 1

Ala

Answer 1

The winged flare of the nostril

Question 2

Bitewing radiograph

Answer 2

Radiograph used primarily to examine the interproximal surfaces of the teeth

Question 3

Cone cut

Answer 3

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

Question 4

Elongation

Answer 4

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

Question 5

Foreshortening

Answer 5

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

Question 6

Horizontal angulation

Answer 6

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

Question 7

Interproximal

Answer 7

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

Question 8

Long axis of the tooth

Answer 8

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

Question 9

Overlapping

Answer 9

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

Question 10

Paralleling technique

Answer 10

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

Question 11

Periapical radiograph

Answer 11

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

Question 12

Perpendicular

Answer 12

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 )

Question 13

Position indicating device(PID)

Answer 13

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

Question 14

Radiograph

Answer 14

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

Question 15

Tragus

Answer 15

The prominence of tissue located toward the middle opening of ear

Question 16

Vertical angulation

Answer 16

Proper alignment of the PID in a up and down direction