Deck 17: Paralleling Technique

Question 1

How many exposures of the posterior teeth will you need to take when using the paralleling technique?

A)Four
B)Six
C)Seven
D)Eight

Answer 1

Eight

Question 2

Image magnification occurs when the ______________ distance is increased.

A)target-object
B)object-receptor
C)target-receptor
D)operator-patient

Answer 2

object-receptor

Question 3

Your patient has a shallow palate;you should modify your technique when there is a lack of parallelism ________________.

A)greater than 10 degrees
B)greater than 20 degrees
C)greater than 30 degrees
D)less than 30 degrees

Answer 3

greater than 20 degrees

Question 4

Image magnification can be decreased when the _______________ is increased.

A)target-object
B)object-receptor
C)target-receptor
D)operator-patient

Question 5

Which posterior quadrant would be the best for you to begin with when using the paralleling technique?

A)Maxillary left quadrant
B)Maxillary right quadrant
C)Mandibular left quadrant
D)Mandibular right quadrant

Question 6

(1)When taking maxillary periapical images on a patient with a shallow palate,there is only one technique that can be used to compensate for lack of parallelism.(2)To compensate for lack of parallelism,the vertical angulation can be increased by 5 to 15 degrees more than the XCP instrument indicates.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 7

If you are using size 2 receptors,how many exposures will you need to take of the anterior teeth?

A)Four
B)Six
C)Seven
D)Eight

Question 8

According to the text,a size 1 receptor is always positioned with the long portion of the receptor in a ____________ direction,and a size 2 receptor is always positioned with the long portion of the receptor in a ______________ direction.

A)vertical;vertical
B)horizontal;horizontal
C)vertical;horizontal
D)horizontal;vertical

Question 9

Which posterior quadrant should you move to next (second)when using the paralleling technique?

A)Maxillary left quadrant
B)Maxillary right quadrant
C)Mandibular left quadrant
D)Mandibular right quadrant

Question 10

Reusable receptor holders must be _________________ after each use.

A)rinsed with tap water
B)wiped with disinfectant
C)placed in an immersion disinfectant
D)sterilized

Question 11

Parallel is defined as

A)cutting across or through.
B)intersecting at or forming a right angle.
C)moving or lying in the same plane,always separated by the same distance and not intersecting.
D)an angle of 90 degrees formed by two lines perpendicular to each other.

Question 12

The authors recommend using a size ____ receptor for anterior teeth and a size ____ receptor for posterior teeth.

A)1;1
B)2;2
C)1;2
D)2;1

Question 13

Which of the following is a disposable receptor holder designed for one-time use only?

A)Rinn XCP instruments
B)Precision receptor holders
C)Stabe bite-block
D)Snap-a-ray receptor holder

Question 14

If you are taking an anterior image sequence,which tooth do the authors recommend you begin with?

A)6
B)8
C)9
D)11

Question 15

To achieve parallelism between the receptor and the tooth,the ____________ distance must be increased to keep the receptor parallel with the long axis of the tooth.

A)target-object
B)object-receptor
C)target-receptor
D)operator-patient

Question 16

Your patient has a palatal torus,where should you place the receptor?

A)You cannot take a periapical,the patient will require a panoramic receptor.
B)Place the receptor on the torus.
C)Place the receptor in front of the torus next to the teeth you are exposing.
D)Place the receptor on the far side of the torus.

Question 17

According to the basic principles of the paralleling technique,the receptor is placed in the mouth _________ to the long axis of the tooth being x-rayed,and the central ray of the x-ray beam is directed ____________ to the receptor and long axis of the tooth.

A)parallel;perpendicular
B)parallel;parallel
C)perpendicular;parallel
D)perpendicular;perpendicular

Question 18

(1)The dental radiographer should be careful not to stimulate the patient's gag reflex.(2)Once the gag reflex is stimulated,the patient may gag on receptors that could normally be tolerated.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 19

Which of the following receptor holders include aiming rings that aid in the alignment of the position-indicating device (PID)with the receptor?

A)Hemostat with bite-block
B)Stabe bite-block
C)Snap-a-ray receptor holder
D)Rinn XCP instruments

Question 20

If you are using size 1 receptors,how many exposures will you need to take of the anterior teeth?

A)Four
B)Six
C)Seven
D)Eight

Question 21

Identify this image;it is mounted using the labial view.

A)Maxillary right canine
B)Maxillary left canine
C)Maxillary right incisors
D)Maxillary left incisors

Question 22

According to the basic rules of paralleling,the central ray should be directed ______________ to the receptor and the long axis of the tooth.

A)parallel
B)perpendicular
C)horizontal
D)adjacent

Question 23

Which basic rule of paralleling indicates that the central ray should be directed through the contact area of the teeth?

A)Receptor placement
B)Vertical angulation
C)Horizontal angulation
D)Receptor position

Question 24

Which of the following images must include the crowns,roots,and surrounding bone of the right or left central and lateral incisors?

A)Maxillary canine
B)Maxillary incisor
C)Mandibular canine
D)Mandibular incisor

Question 25

Which basic rule of paralleling states that the receptor must be parallel to the long axis of the tooth?

A)Receptor placement
B)Receptor position
C)Vertical angulation
D)Receptor exposure

Question 26

Which of the following images must include the crowns,roots,and surrounding bone,sinus and tuberosity region of the first,second,and third molars?

A)Maxillary premolar
B)Maxillary molar
C)Mandibular premolar
D)Mandibular molar

Question 27

(1)The American Dental Association (ADA)and the American Academy of Oral and Maxillofacial Radiology both recommend the use of a beam alignment device to reduce the amount of radiation the patient receives.(2)Limiting the size of the x-ray beam not only reduces the amount of skin that is exposed but also results in a significant reduction of radiation to the patient,by as much as 20%.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 28

(1)When using the paralleling technique,you must be conscious of fixed vertical angulations.(2)The paralleling technique creates dental images free from dimensional distortion.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 29

Identify the major placement error in this molar radiograph.

A)Too far mesial
B)Too far distal
C)Vertical angulation
D)Horizontal angulation

Question 30

When using film,the dot should always be placed ________ in relation to the bite-block.

A)down
B)up
C)distal
D)in the slot

Question 31

Which target-receptor distance should be used in the paralleling technique to compensate for image magnification and loss of definition?

A)4 inches
B)8 inches
C)12 inches
D)16 inches

Question 32

When placing the receptor in the mandibular premolar region,the receptor must be placed ________ the tongue.When inserting the receptor holder into the mouth,the receptor is tipped __________ the tongue.

A)over;toward
B)over;away from
C)under;toward
D)under;away from

Question 33

Identify this image;it is mounted using the labial view.

A)Maxillary right molars
B)Maxillary left premolars
C)Maxillary left molars
D)Mandibular left molars

Question 34

The lingual cusp of the first premolar usually obscures the distal contact of the canine on the ________________ exposure.

A)maxillary canine
B)maxillary incisor
C)mandibular canine
D)mandibular incisor

Question 35

Which of the Rinn beam alignment device includes one ring and one arm that can be used for anterior,posterior,and bite-wing receptor positioning?

A)Rinn XCP Extension Cone Paralleling System
B)Rinn XCP-ORA System
C)Rinn SCP-DS FIT Universal Sensor Holder
D)Rinn Flip-Ray System