Dental X-ray Film

Dental X-ray film

— serves as an image receptor that captures radiographic images

image

a picture or likeness of an object

receptor

something that responds to a stimulus

film base, adhesive layer, film emulsion, protective layer

Dental X-ray film consists of four basic components

film base

Film Composition

• A flexible polyester plastic (0.2mm thick)

film base

Film Composition

• Provides stable support for the emulsion

film base

Film Composition

• Resistant to heat, moisture, and chemicals

adhesive layer

Film Composition

• Thin layer covering both sides of the film base

adhesive layer

Film Composition

• Attaches the emulsion to the base

film emulsion

Film Composition

• Coating on both sides of the film base.

film emulsion

Film Composition

• Contains silver halide crystals, which absorb X-rays and store energy as a latent image

protective layer

Film Composition

• Transparent coating over the emulsion

protective layer

Film Composition

• Protects from physical damage and handling

screen film

type of extraoral films

• Requires an intensifying screen inside a cassette

screen film

type of extraoral films

• Screens convert X-ray energy into fluorescent light to expose the film.

non-screen film

type of extraoral films

• Does not require intensifying screens

non-screen film

type of extraoral films

• Exposed directly to X-rays.

non-screen film

type of extraoral films

• Requires more radiation exposure (not recommended for dental use).

blue-sensitive film

type of screen films

• calcium tungstate screens

green-sensitive film

type of screen films

• rare earth screens – requires less radiation

periapical film

type of intraoral film

• Used to capture the entire tooth (crown, root, and surrounding bone)

periapical film

type of intraoral film

• Shows the tip of the root (apex) and adjacent structures

bitewing film

type of intraoral film

• Captures the crowns of both maxillary and mandibular teeth

bitewing film

type of intraoral film

• Useful for interproximal (between teeth) examination

bitewing film

type of intraoral film

• Has a wing or tab for patient stabilization

occlusal film

type of intraoral film

• Used for imaging large areas of the maxilla or mandible

occlusal film

type of intraoral film

• Larger than periapical and bitewing films

occlusal film

type of intraoral film

• Named "occlusal" because the patient bites on the film

0

film sizes

• Smallest, used for pediatric patients

1

film sizes

• Used for anterior teeth in adults

2

film sizes

• Standard adult periapical and bitewing

3

film sizes

• Extended bitewing film

4

film sizes

• Large occlusal film

silver halide crystals

Films contain —, which absorb radiation and form a latent image

visible image

Processed films reveal a — through chemical development

50-70 F

Film Storage

• temperature

30-50%

Film Storage

• humidity

radiation, light, heat, moisture

Film Storage

• protect from —

expiration date

Film Storage

• use before the —

duplicating film

Special Film Types

• Used to create identical copies of intraoral or extraoral radiographs

duplicating film

Special Film Types

• Used in a darkroom, not exposed to X-rays

d-speed film

Film Speed Types

• Slower, requires more exposure

e-speed film

Film Speed Types

• Faster, requires half the exposure of D-speed, with good contrast

d-speed film

Film Speed Types

• Best image clarity but requires the most radiation

e-speed film

Film Speed Types

• offering a good balance of speed and image

  quality

f-speed film

Film Speed Types

• The fastest film with the least exposure time, reducing radiation significantly

digital sensors

Film Speed Types

• Provide instant imaging, require minimal radiation, but need specialized equipment