Question 1

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

Accepted Answer

The above image is of the maxillary right incisors.

Question 2

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

Accepted Answer

Vertical angulation,the third basic rule of paralleling states that the central ray of the x-ray beam must be directed perpendicular (at a right angle)to the receptor and the long axis of the tooth.Receptor position,the second basic rule of paralleling states that the receptor must be positioned parallel to the long axis of the tooth.Horizontal angulation,the fourth basic rule of paralleling indicates the central ray of the x-ray beam must be directed through the contact areas between teeth.

Question 3

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

Accepted Answer

Receptor placement,the first basic rule of paralleling,indicates the receptor must be positioned to cover the prescribed area of teeth to be examined.Horizontal angulation,the fourth basic rule of paralleling states that the central ray of the x-ray beam must be directed through the contact areas between teeth.Vertical angulation,the third basic rule of paralleling states that the central ray of the x-ray beam must be directed perpendicular (at a right angle)to the receptor and the long axis of the tooth.Receptor position,the second basic rule of paralleling,indicates the receptor must be positioned parallel to the long axis of the tooth.

Question 4

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

Accepted Answer

The entire crowns and roots of one lateral and one central incisor,including the apices of the teeth and surrounding structures,must be seen on the maxillary incisor image.

Question 5

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

Accepted Answer

Receptor placement,the first basic rule of paralleling,indicates the receptor must be positioned to cover the area of teeth to be examined.Receptor position,the second basic rule of paralleling,indicates the receptor must be positioned parallel to the long axis of the tooth.Vertical angulation,the third basic rule of paralleling,indicates the central ray of the x-ray beam must be directed perpendicular (at a right angle)to the receptor and the long axis of the tooth.Receptor exposure,the fifth basic rule of paralleling,indicates the x-ray beam must be centered on the receptor to ensure that all areas are exposed.

Question 6

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

Accepted Answer

All crowns and roots of the first,second,and third molars,including the apices,alveolar crests,contact areas,surrounding bone,and tuberosity region,must be seen on the maxillary molar image.

Question 7

(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.

Accepted Answer

The American Dental Association (ADA)and the American Academy of Oral and Maxillofacial Radiology both recommend the use of a rectangular collimator to reduce the amount of radiation the patient receives.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 70%.

Question 8

(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.

Accepted Answer

The paralleling technique does not rely on fixed vertical angulations and produces a radiographic image without dimensional distortion.

Question 9

Identify the major placement error in this molar radiograph.

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

Accepted Answer

The receptor was placed too far forward;the entire third molar region is missing.

Question 10

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

Accepted Answer

The authors recommend that each film be placed in the bite-block with the dot in the slot.

Question 11

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

Accepted Answer

4 inches will not compensate for image magnification in the paralleling technique.A long (16-inch)target-receptor distance must be used.8 inches will not compensate for image magnification in the paralleling technique.A long (16-inch)target-receptor distance must be used.12 inches will not compensate for image magnification in the paralleling technique.A long (16-inch)target-receptor distance must be used.A long (16-inch)target-receptor distance must be used with the paralleling technique to compensate for image magnification.

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

This image is of the maxillary left molars.

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

The Rinn XCP Extension Cone Paralleling System includes three plastic bite-blocks,three plastic aiming rings,and three metal indicator arms.It may be used with film,PSP sensors,and digital sensors.The Rinn XCP-ORA One Ring & Arm Positioning System includes one ring and one arm.It was designed to be universal and accommodates anterior,posterior,and bite-wing receptor placement.It may be used with film,PSP sensors,and digital sensors.The Rinn XCP-DS FIT Universal Sensor Holder is a bite-block that includes a self-adjusting clip that stretches to accommodate the size of the digital sensor,regardless of brand or size.The Rinn Flip-Ray System uses a rotating bite-block and ring to eliminate multiple positioning parts.It may be used with film or PSP sensors.

Quiz 17: Paralleling Technique

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

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

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

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

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

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

(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.

Identify the major placement error in this molar radiograph.

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

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

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.

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

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

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?