Dentistry Chapter 7 A protective layer is a thin coating over the emulsion

Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 1

Dental X-Ray Film

Chapter 7

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Slide 2

Learning Objectives

Lesson 7.1: Dental X-Ray Film

1. Define the terms associated with dental

x-ray film.

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Slide 3

Learning Objectives

Lesson 7.1: Dental X-Ray Film (Cont.)

6. Identify the types and sizes of intraoral film

available.

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 4

Learning Objectives

Lesson 7.1: Dental X-Ray Film (Cont.)

11. Describe the use of intensifying screens and

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Slide 5

Introduction

Purpose

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Slide 6

Dental X-Ray Film

Composition and Latent Image

Dental x-ray film serves as a recording

medium or image receptor.

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 7

Film Composition

Dental x-ray film has four basic components.

Film base

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Slide 8

Film Base

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Slide 9

Adhesive Layer

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 10

Film Emulsion

A homogenous coating with a mixture of

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Slide 11

Protective Layer

A protective layer is a thin coating over the

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Slide 12

Latent Image Formation

Silver halide crystals contain various levels of

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 13

Latent Image Formation (Cont.)

When photons strike the emulsion, some

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Slide 14

Types of Dental X-Ray Film

Intraoral film

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Slide 15

Intraoral Film

Placed inside the mouth and used to examine

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 16

Intraoral Film Packaging

Used to protect the film from light and

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Slide 17

Intraoral Film Packaging (Cont.)

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Slide 18

X-Ray Film

One or two double-emulsion film packet

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 19

Paper Film Wrapper

A black protective sheet to cover the film and

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Slide 20

Lead Foil Sheet

Located behind the film wrapped in black

protective paper

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Slide 21

Outer Package Wrapping

Soft vinyl or paper to seal the contents and

protect them from light or moisture

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 22

Intraoral Film Types

Periapical film

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Slide 23

Periapical Film

Used to examine the entire tooth and

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Slide 24

Bite-Wing Film

Used to examine the crowns of both maxillary

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 25

Occlusal Film

A larger film used for examination of large

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Slide 26

Intraoral Film Sizes

Five sizes: 0, 1, 2, 3, 4

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Slide 27

Periapical Film

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 28

Bite-Wing Film

0: Used for posterior teeth in small children

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Slide 29

Occlusal Film

4: Used to examine large areas of the maxilla

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Slide 30

Intraoral Film Speed

Film speed

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 31

Intraoral Film Speed (Cont.)

X-ray films given speed ratings ranging from

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Slide 32

Extraoral Film

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Slide 33

Extraoral Film Packaging

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 34

Extraoral Film Types

Screen film

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Slide 35

Screen Film

Requires the use of a screen in a cassette

with phosphors for exposure

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Slide 36

Nonscreen Film

Does not require the use of a screen

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 37

Extraoral Film Equipment

Intensifying screens

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Slide 38

Intensifying Screens

Device that transfers x-ray energy into visible

light; the visible light then exposes the screen

film

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Slide 39

Intensifying Screens (Cont.)

Two types

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 40

Cassette

A cassette is used to hold the film and the

intensifying screens.

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Slide 41

Cassette (Cont.)

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Slide 42

Duplicating Film

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 7 Student Handout

Slide 43

Duplicating Film (Cont.)

Duplicating film packaging

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Slide 44

Film Storage and Protection

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Slide 45

Questions?

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