What is the actual xray film composed of?
Flexible, thin, polyester plastic
What is the emulsion composed of?
Silver halide crystals, in a gelatin base.
What are halides compounds of?
Chlorine, bromin, and iodine.
What is a " Latent image "?
An image stored on an exposed film, that doesn't show until it is porcessed or developed.
What does the film packet have on the outside of it?
A sealed plastic wrap.
To protect the film from moisture and light.
What two things, other than the film, are found inside the packet?
Black paper, and lead foil.
What does the lead foil do?
Absorbs unused xrays.
What are the 5 film sizes and what are they most commonly used for?
- 0- pedo (children)
- 1- narrow anterior
- 2- adults
- 3- long bite-wings
- 4- occlusal
List 3 types of intraoral radiographs.
Periapical (PA), Bitewings (BW), Occlusal
What do periapical xrays show?
Entire tooth and surrounding area.
What portion of the teeth do bitewings show, and what are they primarily used for?
Coronal portion of max and mand.
Detect Interproximal decay.
Why are occlusal films taken?
To show large areas of either the max or mand arch.
List 4 processes occlusal films may show.
Cysts, stones, fractures, supernumerary
What does FMX stand for?
typically how may films are involved?
Full mouth xray
What are the two most common extraoral radiographs taken?
Panoramic and cephalometric (cefa - lo - metric)
What are 4 uses of extraoral film, What do they show?
TMJ, Fractures, impactions, Pathology
What is the film holder for extraoral film called?
Short scale contrast is mostly _____ and _____.
Black and White
Long scale contrast contains multiple shades of ______.