Extraoral And Digital Radiographic Procedure

Question 1

Extraoral

Answer 1

Outside the mouth

Question 2

Panoramic radiographs

Answer 2

Image that helps to visualize the entire dentition in both arches, along with maxillary sinuses and the nasal cavity.

Question 3

Focal trough

Answer 3

An imaginary horse shoe shaped three dimensional area.

Question 4

Compartments of the panoramic unit

Answer 4

Panoramic x-ray tube head

Head positioner

Exposure controls

Question 5

Head positioned

Answer 5

used to align the patients teeth as accurately as possible

Question 6

Ghost image

Answer 6

Caused by the failure to remove earrings, dentures, and other radio dense objects. Looks like a real object, except that it appears on the opposite side of the film.

Question 7

Lead apron artifact

Answer 7

If placed too high, or if a lead apron with a thyroid collar is used, a cone shaped radiopaque results. To avoid this area, placed a lead apron lower around the patient’s neck.

Question 8

Improper tongue placement

Answer 8

If the tongue is not placed on the roof of the mouth, a radiolucent shadow will be superimposed over the apices of the maxillary teeth

Question 9

Chin too high

Answer 9

It’s a Chinese tipped upward, the radiograph will exhibit a reverse smile line and detail will be lost.

Question 10

Chin too low

Answer 10

When the chin is tipped downward, the radiograph exhibits an exaggerated smile line, and the condyles are not visible.

Question 11

Lateral cephalometric projection

Answer 11

This radiograph is used to evaluate bones of the face in school, including trauma, disease, or facial abnormal tees. It is used primarily for orthodontic purposes.

Question 12

Posteroanterior projection

Answer 12

This radiograph is used to evaluate facial growth and trauma, disease, and facial development.

Question 13

Submentovertex projection

Answer 13

This projection, which is not commonly used in dental offices, evaluates the position of the condyles, base of the skull, and fractures of the zygomatic arch

Question 14

Reverse towns projection

Answer 14

This projection, which is not commonly used in a dental office, evaluate fractures of the condylar neck and ramus.

Question 15

Waters projection

Answer 15

This projection is used for evaluating factors of the face, sinuses, the maxilla common zygomatic arch is, the orbit of the eyes, and the coronoid process.

Question 16

Cephalostat

Answer 16

The cephalostat includes a film holder and head positioned that allow the operator to easily position the patient.

Question 17

Grid

Answer 17

A device used to decrease film fog and increase the contrast of the radiographic image. It does this by reducing the amount of scatter radiation that reaches the extraoral film exposure

Question 18

Scatter radiation

Answer 18

X-rays at bounce off bones and teeth. Scatter radiation causes film contrast.

Question 19

Lateral jaw projection

Answer 19

Used to view the posterior region of the mandible. This type of projection is very useful for patients with limited y’all opening or cannot tolerate intraoral film placement

Question 20

Body of mandible projection

Answer 20

These techniques are designed to evaluate the posterior region of the mandible, including impacted teeth, factors, and lesions, the cassette his place directly on the patients cheek. One disadvantage is that the patient must hold the cassette.

Question 21

Ramus of mandible projection

Answer 21

This film is used to evaluate impacted third molars, large lesions, and fractures that extends into the Ramus of the mandible. The Ramus from the angle of the mandible to the condyles is visible in this projection

Question 22

Digital radiography

Answer 22

The film less digital radiographic system

Question 23

Digital radiography equipment

Answer 23

Dental x-ray unit

Intraoral sensor

Computer

Question 24

Types of digital imaging

Answer 24

Direct

Indirect

Storage phosphor