Bisecting and Paralleling Techn.

Question 1

One of the advantages of the Bisecting Technique is:

Answer 1

Can be used when a patient has a shallow palate

Question 2

In taking a periapical radiograph using the bisecting technique, the x-ray beam was not centered on the film packet. The resulting film shows:

Answer 2

Cone cut

Question 3

According to the basic principles of the paralleling technique, the film is placed in the mouth____ to the long axis of the tooth being radiographed, and the central ray of the x-ray beam is directed ______ to the film long axis of the tooth.

Answer 3

Parallel; perpendicular

Question 4

When using the Bisecting Technique what is the relationship b/w the imaginary bisector and the central ray?

Answer 4

The central ray is perpendicular to the imaginary bisector

Question 5

A periapical film must show:

Answer 5

The crown and the apex of the tooth

Question 6

One of the advantages of the parallel technique is:

Answer 6

Simple and easy to use

Question 7

When the bisecting technique is used, which of the following angles is bisected?

Answer 7

The angle formed by the receptor and the long axis of the tooth

Question 8

What factor affects forshortening and elongation of a tooth image on the film while using the Bisecting Technique?

Answer 8

Vertical angle

Question 9

A small (short) object-receptor distance will increase magnification  of the tooth image? 
T or F?

Answer 9

False

Question 10

When using the Parallel Technique the film and the ____ should be as parallel as possible

Answer 10

long axis of the tooth