Dental Final: Multiple Choice

In placing a periapical radiograph, how many inches over the occlusal / incisal edge should the film packet be placed?

1/8

The computer monitor can display over ___ shades of gray, but the human eye can detect only _____ shades of gray.

200, 32

The MPD per year for radiation workers is ___ rems

5

Which of the following are intervals of taking radiographs for routine dental exams?

6 months 12 months

The ideal temperature of developing solutions is ___ degrees

68

When a conventional x-ray machine is used with digital radiography, the x-ray machine should be capable of producing ____ kV.

70

The temperature for automatic processing is around ___ degrees.

90

The effects of radiation are

Accumaltive

Which of the following would appear on a bitewing radiograph?

Alveolar crest Faulty restoration Caries

Which of the following would a periapical radiograph show?

Apical area of a tooth Tooth development stage Eruption stage

A dosimeter badge should be worn

At all times in the dental office

Movement by the patients head or the tube head results in

Blurred image

The tissue/organs most sensitive to radiation include

Bone marrow Reproductive cell

The ____ is one of the most widely used image receptors in dental digital radiology

CCD

The following are disadvantages of digital radiography EXCEPT

Capability to enhance, contrast, or zoom in on an image from chairside

Bitewings will detect which of the following?

Caries

The molybdenum focusing cup is on which side of the x-ray tube?

Cathode

The radiograph used to access the patients skeletal profile and structure is

Cephalometric

Which observations should be made of a childs mouth before placing films?

Check for loose teeth Cold sores Canker sores

The lead apron with the thyroid collar should be used for

Children Adults Pregnant women

A film not exposed to radiation results in

Clear film

Another name for the lead diaphragm is the

Collimator

If the beam missed part of the film, the result is

Cone cutting

Milliamperage seconds determine the amount of radiation exposure the patient recieves. The difference betweeen the shades of gray is the

Contrast

The degree of darkness on an x-ray, which is also controlled by MAS, is the

Density

Dark film image is a result of

Developing solution being too warm Overdeveloping

Which of the following features of digital radiography can a radiographic image display?

Digitized Sent to another office by fax or modern Enhanced

Streaks on the film are a result of

Dirty rollers on an automatic processor Dirty processing racks

Duplication of a radiographs requires

Duplicating films Duplication machine Processing method

The technique error caused by not having enough angulation is

Elongation

In regard to the size of crystals in the emulsion, the larger the crystals the

Faster the film

The area on the tungsten target where the elections hit is the

Focal Spot

The technique error caused by having too much angulation

Foreshortening

Panoramic radiographs give the dentist a view of

Fractures in bone Sinuses The entire dentition TMJ Unerupted teeth

Placement of the film backward in the patients mouth results in

Herringbone pattern

In the developing solution, which chemical blckens the exposed silver halide crystals?

Hydroquinone

The dental film that has the highest speed for the greatest reduction in radiation exposure for the patient is the

Insight

What determines the quality of radiation?

Kilovoltage

The dental film that reduces radiation exposure up to 20 percent is the

Kodak Insight F- Speed

When mounting films, the term used when placing the dot towards the operator is called

Labial mounting

The time between the exposure and the development of biological effects is the ______ period.

Latent

The form of radiation that escapes in all directions from the tube head is _____ radiation.

Leakage

What determines the amount or quantity of radiation?

Milliamperage

The dental specialist who routinely use extraoral radiographs are

Oral surgeons and orthodontists

Which dental specialty routinely uses the cephalometric radiograph?

Orthodontics

Digital images can be attached as digital data files and sent to which of the following?

Other dental offices Insurance companies Patients via letters

Incorrect horizontal angulation results in

Overlapping

Sensor/ image plates for digital imaging can come in which of the following sizes and designs?

Panoramic Cephalometric Full-sized "0" x-ray Full-sized "2" x-ray

Sensor/image plates for digital imaging can come in which of the following sizes and designs?

Panoramic Cephalometric Full-sized "0" x-ray Full-sized "2" x-ray

In the paralleling technique, the film packet must be

Parallel to the long axis of the tooth

Which dental specialist would be the most likely to ask fro vertical bitewings?

Peridontist

In the bisecting angle exposure technique, the central beam must be

Perpendicular to the bisecting line

Extraoral cassettes are usually lined with

Phosphors Intensifying screens

Which of the following will the bitewing radiograph cover?

Premolar area Molar area

The central beam that comes from the x-ray tube head is ___ radiation.

Primary

If an automatic processor has a daylight loader, it means the film can be

Processed in the daylight

The safelight is of a ____ spectrum

Red - orange

Light film image is a result of

Underexposure Underdeveloping

In which position should the patient be placed for a bitewing radiograph?

Upright

An image dector sensor comes in which of the following sizes?

0, 1, 2

The size of narrow anterior film is

1

Brown stain is a result of insufficient

Rinising

The inventor of x-rays

Roentgen

The radiation that is deflected from its path as it strikes matter is ____ radiation

Scatter

The radiation formed when the primary x-rays strike the patient is ____ radiation

Secondary

The following are advantages of using digital radiography EXCEPT

Sensors are usually thicker, causing the patient to gag

Which statement equals more energy?

Short wavelength with high frequency

X-film is sensitive to

Stray radiation Chemicals High Temperatures

Occlusal radiographs may be taken to view which of the following?

Supernumerary teeth Cysts Impacted teeth

A general rule of thumb is to fix ____ as the developing time

Twice as long