Quiz #2 chap 9,10,16,17,18 y 19.

An intensifying screen is a device that transfers x-ray energy into visible light, in turn exposes the screen film

Both statement are true.

Where is the thin lead foil sheet positioned in the film packet?

Behind the film and the black paper film wrapper

Your dentist ask you to take radiographs on your patient in order to check the inter-proximal surfaces on the posterior maxillary and mandibular teeth for decay. Wich type of film would be the best to take the radiograph?

Bite-wing film

When would you use a two film packet when taking radiographs on your patient ?

When a duplicate record of a radiographic examination is needed

A screen that produces a green light must be pained with a _____ sensitive screen film

Green

The film base is transparent with a slight ____ tint used to emphasize contrast and enhance image quality.

Blue

Wich of the following film speed is the fastest film currently available ?

F- speed film

An intensifying screen is a smooth plastic sheet coated with minute fluorescent crystals known as?

Phosphors

Wich component of x-ray film has a suspension of millions of millions of microscopic silver halide crystals?

Film emulsion

Wich of the following types of dental x-ray film would you place inside your patients mouth?

Intraoral film

The film base is ___ mm thick

0.2

Lack of contract between screen and film results in

A loss of image sharpness

Wich type of intraoral film is best for visualizing interproximal surfaces ?

Bite-wing

The film emulsion is composed of a homogenous mixture of

Gelatin and silver halide crystals

The adhesive layers is added to the ________ before the _______ is applied.

Film base , film emulsion

The silver halide crystal that are ___ energized will be ___ when the dental x-ray film is processed.

1, 3

Wich of the following statements is true of a two film packet?

Intraoral x-ray film is a double emulsion type of film regardless of whether the film packet contains one or two films.

What is the propose of the lead foil sheet found within the film packet?

To shield the film from secondary backscatter radiation

The apex (tip) of the tooth roots may be seen on Wich types of Intraoral film?

Both periapical and occlusal film

The film emulsion is

Attached to both sides of the film

An extra oral cleaning film is used to

Clean residual gelatin or dirt from the rollers.

A timer is used to indicate time intervals during Wich of the following steps or manual processing ?

1. Developer solution

2. Rinse water

3. Fixer solution

4. Wash water

A. 1, 2, 3, 4

The lid of the processing tank prevents Wich of the following from occurring.

Oxidation and evaporation of chemicals

Wich of the following statements is true of automatic processing ?

The film is transported directly from the developer solution into the fixer without a rinsing step

Safe lighting is a ___ intensity light composed of i ___ wavelength of the visible light spectrum

Low , Long .

Insufficient fixation time or insufficient rinsing would lead to

Yellow-brown film.

Your radiograph has thin, diverging black lines on it. What is the most likely cause of this?

Humidity levels are too low, and you opened the package too quickly

When the film exist the film processor, you notice that it appears foggy and lacks detail. Wich of the following could be a possible solution of prevent this from occurring with the next patient film?

Eliminate light leaks.

All excess chemicals are removed from the film emulsion during

Washing

Wich of the following statements is true about the development step in film processing ?

Development is the first step in processing film.

Safe lighting is in the _______ Portion of the visible light spectrum .

Red-Orange

(1) Developer chemicals contain a preservative that prevents the chemicals from oxidizing when exposed to air. (2) Sodium carbonate is the preservative used in developer solutions

The first statement is true and second false

The propose of a stirring rod is to

Mix the chemicals and equalize the temperature of the solutions .

Potassium bromide, an alkaline accelerator activates the developer solution and softens the gelatin in the film emulsion (2) Sodium carbonate, the restrainer, prevents film fog by stopping the development of the silver halide crystals.

Both statements are false

Films that are exposed to safelight illumination for more than 2 or 3 minutes will appear

Fogged

Duplicating film_____

Requires the use of a film duplicator

The chemical responsible for creating the gray shades on the radiographs is?

Elon

Overdeveloped films may result from

Over concentrated developer solution

The major advantage of automatic film processing versus manual film processing is

Less processing time is required

Reticulation means the film appears

Cracked

Under Wich following condition must you wear you mask and safety glasses?

Whenever spatter and aerosolized sprays of blood and saliva likely

Wich of the following is considered to be a semi critical instrument ?

The beam alignment devices

Bleach-free desinfectan wipes

EPA- registered chlorine - containing compounds labeled as both hospital disinfectants and and tuberculosis.

Wich of the following is true regarding your usage of disposable medical gloves

You can use non-sterile gloves for examinations and non-surgical procedures

In dental imaging, no ________ are used.

Critical instrument

Wich of the following surfaces on x-ray machine must be covered or disinfected ?

1. Control panel

2. Exposure button

3. Tubehead

4. Position-indicating device (PID)

A. 1, 2, 3, 4.

After seating the patient, the radiographer must complete Wich of the following procedures before washing the hands and putting on gloves?

1. Chair adjustment

2. Headrest adjustment

3. Placement of the lead apron

A.1, 2, 3.

Preparation of supplies and equipment involves sterilizing Wich of the following items?

Beam alignment devices.

Antiseptic is

A substance that inhibits the growth of bacteria

Recommendations concerning gloves would fall under Wich of the following categories. of infection control practices that directly relate to dental imaging procedures ?

Personal protective equipment

What is important for you to remember about your protective clothing?

Select clothing that prevents skin and mucous membrane exposure to blood or other bodily fluids.

Another term for infection control is ______ wich means the absence of pathogens, or disease causing microorganisms.

Asepsis

Wich of the following should you do to prepare your treatment room prior to taking a dental image?

Follow manufacturers instructions for infection control procedures.

Wich of the following should you so first when using a daylight loader for film processing?

Place new paper cup and gloves in the daylight loader and compartment

When handling film with barrier envelopes are opened with _____ hands and the films with ____hands.

Gloved , Non-gloved .

When the step wedge technique is used to evaluate developer strength, and the density on the daily radiograph differs from that on the standard radiograph by more than ____ steps, the developer solution is depleted.

Two

The step wedge technique for evaluating developer strength relies on exposing one exposed stepwedge film.

Each day

According to the test for dental x-ray film, if the processed film appears clear with a slight blue tint, the film.

Is fresh and has been properly stored and protected.

A calibration test for accurate kilovoltage and milliamperage reading would most likely be performed to ensure that the dental _____ is functioning properly

X-ray machine

Where is the best place for you to view the radiograph that you used for the film screen contact test?

Dimly lit room at a distance of 6 feet from the viewbox.

Your dental office should monitor retakes in a retake log in order to order to identify recurring problems and improve the quality of future images?

Both statements and reason are true

In order to perform the safelight test you would use

A coin

In the processor is functioning properly, the results of the automatic processor test film will be that

The unexposed film appears clear and dry, and the film exposed to light appears black and dry.

If the film clears in ___ minutes the chemistry is of adecúate strength

2

The viewbox should emit a uniform and subdued light when it is functioning properly. Permanently discolored plexiglass surfaces and blackened fluorescente light bulbs must be replaced

Both statements are true

Wich of the following is an extraoral image?

Lateral jaw

Wich of the following is used to evaluate the crown, roots , and supporting bone of a tooth?

periapical

Wich of the following is an extraoral technique for dental image examination

Panoramic

Wich technique examines the crown of both maxillary and mandibular teeth on a single image

occlusal technique

The bitewing receptor is used for the ?

Interproximal exmanination

Wich posterior quadrant would be the best for you to begin with when using the paralleling technique with a Rim Xcp instruments?

Maxillary right quadrant

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

Vertical angulation

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

Receptor position

Identify the major placement error in this periapical molar image.

Place too far distally

If you are taking an anterior image sequence, Wich tooth do the author recommend you begin with?

6

Reusable receptor holders must be ____ after each use.

Sterilized

According to the basic principles of the paralleling technique the receptor is placed in the mouth _____ to the long axis of the tooth being x-rayed, and the central ray of the x ray beam is detected ______ to the receptor and long axis of the tooth

Parallel , perpendicular.

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

In the slot

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

Perpendicular

Wich of the following is a disposable receptor holder designed for one-time use only?

Stabe bite-block