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Radiography > Dental X-ray Film > Flashcards

Dental X-ray Film Flashcards

1
Q

What determines film speed?

A

Size of silver halide crystals

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2
Q

What is the fastest film speed and why

A

F speed due to larger crystals

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3
Q

What is the slowest film speed and why

A

D speed due to smaller crystals

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4
Q

What causes a radiolucent image

A

Silver halide crystals being energized

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5
Q

What causes a radiopaque image

A

The x-rays are absorbed so the silver halide crystals are not energized

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6
Q

What kind of light is needed for intensifying screens

A

Blue or green fluorescent light

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7
Q

What are the steps of manual processing

A

Developing > rinsing > fixing > washing > drying

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8
Q

What chemicals are used for developer?

A

Elon and hydroquinone

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9
Q

What chemical is used as a preservative

A

Sodium sulfite

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10
Q

What chemical is used as an accelerator

A

Sodium carbonate

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11
Q

What chemical is used as a restrainer

A

Potassium bromide

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12
Q

What chemical is used as a fixer

A

Sodium thiosulfate or ammonium thiosulfate

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13
Q

What chemical is used as a hardening agent

A

Potassium alum

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14
Q

What is the ideal time and temperature for developer and fixer

A

68 degrees for 5 mins

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15
Q

How frequently should you replenish chemicals

A

Daily

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16
Q

How frequently should you change chemicals

A

Every 3-4 weeks

17
Q

What is the proper wattage for a safelight bulb

A

15 watts

18
Q

How far away should a safelight be positioned

A

4 ft

19
Q

At what time and humidity should film be stored

A

50-70% humidity

50-70 degrees

20
Q

How should duplicating film be positioned

A

The original goes on the duplicating box and duplicating film with the dull side on top of the original. Notch in top right corner.

21
Q

What time of light is used for duplicating film

A

UV light

22
Q

What causes reticulation

A

Differing temps of developer and fixer

Radiography (2 decks)

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