CHAPTER 17 : PARALLELING TECHNIQUE

Question 1

one method that can be used to expose periapical and bite-wing image receptors.

Answer 1

Paralleling technique

Question 2

the _____________ distance must be increased to keep the receptor parallel with the long axis of the tooth

Answer 2

object receptor distance

Question 3

To compensate for image magnification, the ____________ must also be increased to ensure that only the most parallel rays will be directed at the tooth and the receptor.

Answer 3

target- receptor distance

Question 4

which size PID is preffered in the paralleling technique?

Answer 4

longer PID

Question 5

which collimator reduces the amount of radiation the patient receives? rectangular or round?

Answer 5

rectangular - reduces by 70%

Question 6

This receptor holding device can be used in both anterior and posterior areas

Answer 6

Rin snap a ray holder

Question 7

a disposable receptor holder made of Styrofoam and is designed for one time use only

Answer 7

stabe bite block

Question 8

size of receptor used in anterior region

Answer 8

size 1 -

placed in an upright vertical position

Question 9

size of receptor used in posterior regions

Answer 9

size 2 -

placed in a sideways horizontal position

Question 10

in this technique the receptor must be positioned ______ to the long axis of the tooth.

Answer 10

parallel

Question 11

Patient Preparation for Paralleling Technique

Answer 11

explain imaging procedure

adjust chair

adjust headrest

place lead apron with thyroid collar

request patient to remove objests in the mouth,

Question 12

definite order for periapical receptor placement and exposure,

Answer 12

exposure sequence

Question 13

When exposing periapical receptors with the paralleling technique, always begin with which teeth?

Answer 13

anterior teeth (canines and incisors)

Question 14

With the size 1 receptor, a total of ___ anterior placements may be used in the paralleling technique: ___ maxillary exposures and ___ mandibular exposures.

Answer 14

7 total

4 max
3 mand.

Question 15

If the size 2 receptor is used instead, ____ anterior placements are used: ___ maxillary exposures and ____ mandibular exposures.

Answer 15

6 total

3 max
3 man

Question 16

true or false

When the dental radiographer works from the patient’s right to the patient’s left in the maxillary arch and then from the patient’s left to the patient’s right in the mandibular arch, no wasted movement or shifting of the PID occurs

Answer 16

TRUE

Question 17

The anterior Rinn XCP instrument is used for all _____ receptor placements

Answer 17

anterior

Question 18

The posterior Rinn XCP instrument is used for all ______ receptor placements.

Answer 18

posterior

Question 19

Modifications in the paralleling technique may be used to accommodate variations in anatomic conditions. Such AS:

Answer 19

shallow palate,

bony growths,

or a sensitive mandibular premolar region.

Question 20

modifications in paralleling technique

Answer 20

cotton rolls

verical angluation increased by 5 to 15 degrees

Question 21

is a bony growth seen in the oral cavity.

Answer 21

A torus

plural, tori

Question 22

is a nodular mass of bone seen along the midline of the hard palate

Answer 22

A maxillary torus

torus palatinus

Question 23

bony growths along the lingual aspect (tongue side) of the mandible

Answer 23

mandibular tori

Question 24

The advantages of the paralleling technique, does NOT outweigh the disadvantages.

T or F

Answer 24

False it does outweigh the disadvantages

Question 25

advantages of paralleling technique

Answer 25

accuracy
simplicity
duplication

Question 26

disadvantages of paralleling technique

Answer 26

receptor placement

discomfort