Radiolody Quiz 2

Question 1

What is the tube head and how is it used?

Answer 1

Also known as tube housing,Contains the x-ray tube that produces dental x-rays

Question 2

What is the Extension arm and what does it do?

Answer 2

Suspends the x-ray tube head, houses the electrical wires and allows for movement and positioning of the tube head.

Question 3

What is the control Panel and what does it do?

Answer 3

Allows the dental radiographer to regulate the x-ray beam and appears as a console or cabinet.

Question 4

What is the exposure button and how is it used?

Answer 4

Activates the machine to produce x-rays

Question 5

Receptor holder

Answer 5

Device used to hold and align intraoral dental x-ray receptors in the mouth

Question 6

Beam alignment device

Answer 6

Used to position an intraoral receptor in the mouth and maintain the recepetor in position during exposure

Question 7

Snap-a-ray

Answer 7

Double ended instrument that holds the receptor between two serrated plastic grips that can be locked in place.

Question 8

Stabe bite block

Answer 8

Intraoral Receptor holder

Question 9

Collimator

Answer 9

Used to further restrict the size of the x-ray beam and reduce patient exposure

Question 10

No federal standards existed for dental x-ray machines manufactured before the year:

Answer 10

1974

Question 11

PID

Question 12

Film processing steps

Answer 12

1. Development
2. Rinsing
3. Fixing
4. Washing
5. Drying

Question 13

Mounting radiographs

Answer 13

Quicker and easier to view and interpret radiographs, and should be mounted immediately after processing

Question 14

Film mount labeled

Answer 14

Patients full name
Date of exposure
Dentists name
Radiographer’s name

Question 15

Anatomic landmarks

Answer 15

Radiographer should have knowledge of normal anatomic landmarks of the maxilla, mandible, and related structures.

Question 16

CMS

Answer 16

Complete mouth series. Consists of pariapical images alone or a combination of pariapicals and bite-wing images. Include a range of 14- 20 images

Question 17

ALARA

Answer 17

As low as reasonably achievable

Question 18

Occlusal Examination

Answer 18

Used to examine large areas of the maxilla or the mandible on one image.

Question 19

Pariapical Examination

Answer 19

Used to examine the entire tooth(crown and root) and supporting bone

Question 20

Bite-wing Examination

Answer 20

(Inter proximal examination) - Used to examine the crowns of both maxillary and mandibular teeth on a single image.

Question 21

Diagnostic image criteria

Answer 21

1. Optimal density, contrast, definition and detail.
2. Display the least amount of distortion possible, same shape and size as the object being imaged.
3. The CMS must include images that show all teeth bearing areas including dentulous and edentulous regions.
4. Pariapical images must show the entire crowns and roots of the teeth
5. Bite-wing must show open contacts on interproximal tooth surfaces that are not overlapped.

Question 22

Types of intraoral images

Answer 22

Used to examine areas in the mouth
- Pariapical
- Interproximal
- Occlusal

Question 23

Extraoral imaging

Answer 23

Used to examine large areas of the skull or jaws placed outside the mouth
Ex: Panoramic image

Question 24

Types of receptors

Answer 24

Paripical
Bite-wing
Occlusal

Question 25

Bite-wing image

Answer 25

Used to detect interproximal caries. the crowns of maxillary and mandibular teeth, interproximal areas, and areas of crestal bone on the same image.

Question 26

Bite-wing technique

Answer 26

Used to examine the interproximal surfaces of teeth.

Question 27

Rinn XCP

Answer 27

The Rinn XCP bite-wing instrument is color-coded and includes a red aiming ring, metal arm, and red plastic bite-blocks

Question 28

Bite-wing tab

Answer 28

Used to stabilize the receptor during exposure. Set angulation at +10 degrees if using film or PSP sensors.

Question 29

Horizontal angulation

Answer 29

Refers to the positioning of the central ray in a horizontal or side to side plane. The bite-wing, paralleling, and bisecting techniques all use the same principles of horizontal angulation.

Question 30

Vertical angulation

Answer 30

Refers to the positioning of the PID in a vertical, or up-and-down, plane

Question 31

Positive Vertical angulation

Answer 31

If the PID is positioned above the occlusal plane and the central ray is directed downward.

Question 32

Negative Vertical angulation

Answer 32

If the PID is positioned below the occlusal plane and the central ray is directed upward.

Question 33

Rules for bite-wing technique

Answer 33

1. Receptor placement
2. Receptor positon
3. Vertical angulation
4. Horizontal angulation
5. Receptor exposure

Question 34

Step-by-steps procedures for bite-wing

Answer 34

Patient preparation, equipment preparation, receptor placement methods

Question 35

Molar Placement

Answer 35

1. Position PID
   - place finger parallel to lower molars
2. Place receptor
3. Check for cone-cuts

Question 36

Premolar Placement Steps

Answer 36

1. Position PID
   - place finger parallel to lower molars
2. Place receptor
3. Check for cone-cuts

Question 37

Pros of digital imaging

Answer 37

1 – superior image resolution 2 – reduced patient exposure 3 – increased speed of image viewing
4 – lower equipment & supply costs
5 – increased efficiency
6 – enhancement options for images

Question 38

Indirect digital imaging

Answer 38

Method of obtaining a digital image, in which a sensor is scanned after exposure to x-radiation and then converted into a digital form that can be viewed on a computer monitor.

Question 39

Cons of digital imaging

Answer 39

1 – initial set-up costs
2 – image quality
3 – sensor size & thickness
4 – infection control
5 – wear and tear
6 – legal issues

Question 40

Phosphor Plates (PSP)

Answer 40

This PSP plate is flexible like film and similar in size, shape, and thickness. The intraoral PSP plate is reusable and is placed into the mouth in the same way as an intraoral film is positioned.
Can be reused 50 or more times.