Lesson 5.3: Exposure Techniques and Mounting Dental Radiographs

Question 1

The most commonly used technique for exposing periapical (PA) images

Answer 1

Paralleling Intra-Oral Technique

Question 2

This technique provides the most accurate intra-oral image

Answer 2

Paralleling Intra-Oral Technique

Question 3

What are the Five Basic Rules for the Paralleling Intra-Oral Technique?

Answer 3

1. Placement
2. Position
3. Vertical Angulation
4. Horizontal Angulation
5. Central Beam

Question 4

The most commonly used technique for exposing bitewing images

Answer 4

Bisecting Angle Technique

Question 5

What is the disadvantage of using the Bisecting Angle Technique?

Answer 5

Dimensional Distortion

Question 6

To position the x-ray generator/collimator perpendicular to a line formed between the long axis of the tooth and the plane of the sensor

Answer 6

The “Rule of Isometry”

Question 7

Why do we perform a “time-out” procedure prior to taking the x-ray?

Answer 7

To verify female patients are not pregnant

Question 8

This is placed in all x-ray rooms; tracks all patient/exposures to radiation; includes retakes

Answer 8

X-Ray Film Log

Question 9

What is information is included in the X-Ray Film Log?

Answer 9

1. Current Date
2. Patient’s Name
3. Patient’s SSN
4. Patient’s Unit
5. Status: Rank/Retired/Dependent
6. Types and Amount of X-Rays Taken
7. Type and Amount of Retakes, and Reason

Question 10

The first plane of reference in proper patient positioning

Answer 10

Median Sagittal/Mid-Sagittal Plane

Question 11

This is an imaginary line drawn vertically through the center of the body; it should be perpendicular to the floor for all exposures

Answer 11

Median Sagittal/Mid-Sagittal Plane

Question 12

The second plane of reference in proper patient positioning

Answer 12

Occlusal Plane

Question 13

The curvature from the incisal edges of the central incisors to the tips of the occlusal surface of the third molars; it should be parallel to the floor for maxillary exposures and parallel to the floor, with the mouth slightly open, for all mandibular exposures

Answer 13

Occlusal Plane

Question 14

What color is the XCP that is used for anterior teeth?

Answer 14

Blue

Question 15

What color is the XCP that is used for posterior teeth?

Answer 15

Yellow

Question 16

What color is the BWX Bite-Tab?

Answer 16

Red

Question 17

XCP:

For anterior exposures, the sensor is placed _______

Answer 17

Vertically

Question 18

XCP:

For posterior exposures, the sensor is placed _______

Answer 18

Horizontally

Question 19

The purpose of Extra-Oral X-Rays

Answer 19

1. A complete survey of the dentition and related structures
2. Locate suspected fractures
3. Determines the development of teeth and the position of impacted teeth
4. Locate tumors, cysts, and other pathological conditions
5. Evaluate growth patterns of jaw and skull
6. To help in the identification of remains

Question 20

The advantages to Extra-Oral X-Rays

Answer 20

1. An increased area of diagnosis
2. Reduces radiation to the patient
3. Provides bilateral view
4. Easy to operate (equipment)

Question 21

The disadvantage to Extra-Oral X-Rays

Answer 21

The images are not as clearly defined

Question 22

Radiographic Placement and Mounting Landmarks:

PA Sensor Placement for Incisors

Answer 22

The sensor is centered on the midline

Question 23

Radiographic Placement and Mounting Landmarks:

PA Sensor Placement for Cuspids

Answer 23

The sensor is centered between the lateral incisor and cuspid

Question 24

Radiographic Placement and Mounting Landmarks:

PA Sensor Placement for Bicuspids

Answer 24

The sensor is centered on the 2nd bicuspid

Question 25

Radiographic Placement and Mounting Landmarks:

PA Sensor Placement for Molars

Answer 25

The sensor is centered on the 2nd molar

Question 26

Radiographic Placement and Mounting Landmarks:

Horizontal BWX Placement for Bicuspids

Answer 26

The sensor is centered between the 1st and 2nd bicuspid

Question 27

Radiographic Placement and Mounting Landmarks:

Horizontal BWX Placement for Molars

Answer 27

The sensor is centered on the 2nd molar

Question 28

The number of images in a Standard Full Mouth Series (FMX)

Answer 28

18; 14 PA and 4 BWX

Question 29

TRUE OR FALSE:

All x-rays are a temporary part of a patient’s digital dental record

Answer 29

False

All x-rays REMAIN A PERMANENT PART of a patient’s digital dental record

Question 30

Radiographic Quality Control:

What can cause Foreign Images?

Answer 30

Dentures, jewelry, glasses, and removable partial dentures

Question 31

Radiographic Quality Control:

What can cause a Blurred Image?

Answer 31

Movement of the patient, film, or tubehead during exposures

Question 32

Radiographic Quality Control:

What can cause Cone Cutting?

Answer 32

The failure of the primary beam to expose the entire film

Question 33

Radiographic Quality Control:

What can cause Overlapping?

Answer 33

Improper Horizontal Angulation

Question 34

Radiographic Quality Control:

What can cause Elongation?

Answer 34

Too little Vertical Angulation

Question 35

Radiographic Quality Control:

What can cause Foreshortening?

Answer 35

Too much Vertical Angulation

Question 36

Radiographic Quality Control:

What can cause a Light Image?

Answer 36

Underexposure

Question 37

Radiographic Quality Control:

What can cause a Dense Image?

Answer 37

Overexposure

Question 38

This may appear on the opposite side of the film and looks similar to a real object; most commonly found on Panoramic X-Rays

Answer 38

Ghost Image(s)

Question 39

What is the goal of Radiographic Quality Control?

Answer 39

To take images, of a high enough quality, that the dentist can make an accurate diagnosis