Dentistry Chapter 23 Edition Student Handout Slide Body

Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 1

Extraoral Imaging

Chapter 23

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Slide 2

Learning Objectives

Lesson 23.1: Extraoral Imaging

1. Define the key terms associated with extraoral

imaging.

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Slide 3

Learning Objectives

Lesson 23.1: Extraoral Imaging (Cont.)

5. Identify the purpose and describe the head

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 4

Introduction

Purpose

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Slide 5

Basic Concepts

Extraoral image

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Slide 6

Purpose and Use

To evaluate large areas of the skull or jaws

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 7

Equipment

X-ray unit

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Slide 8

X-Ray Unit

A standard intraoral x-ray machine may be

used for a variety of extraoral projections.

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Slide 9

X-Ray Unit (Cont.)

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 10

Image Receptors

Extraoral imaging may be digital or film-based

Most extraoral exposures are made with

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Slide 11

Intensifying Screens

A device that converts x-ray energy into

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Slide 12

Cassette

Purpose is to hold the receptor in tight contact

with the intensifying screen and to protect the

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 13

Grid

A device used to reduce the amount of

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Slide 14

Step-by-Step Procedures

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Slide 15

Step-by-Step Procedures (Cont.)

Infection control procedures must be

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 16

Equipment Preparation

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Slide 17

Patient Preparation

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Slide 18

Patient Positioning

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 19

Extraoral Projection Techniques

Lateral jaw imaging

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Slide 20

Lateral Jaw Imaging

Used to examine the posterior region of the

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Slide 21

Body of the Mandible

Purpose

To evaluate impacted teeth, fractures, and lesions

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 22

Body of the Mandible (Cont.)

Beam alignment

Below inferior border of mandible, vertical

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Slide 23

Ramus of the Mandible

Purpose

To evaluate impacted third molars, large lesions,

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Slide 24

Ramus of the Mandible (Cont.)

Beam alignment

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 25

Skull Imaging

Used to examine the bones of the face and

skull

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Slide 26

Lateral Cephalometric Projection

Purpose

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Slide 27

Lateral Cephalometric Projection (Cont.)

Head position

Left side of patient’s head near receptor

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 28

Posteroanterior Projection

Purpose

To evaluate facial growth and development,

trauma, and disease and developmental

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Slide 29

Posteroanterior Projection (Cont.)

Head position

Forehead and nose touch receptor

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Slide 30

Waters Projection

Purpose

To evaluate the maxillary sinus area

Receptor placement

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 31

Waters Projection (Cont.)

Beam alignment

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Slide 32

Submentovertex Projection

Purpose

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Slide 33

Submentovertex Projection (Cont.)

Head position

Head tipped back

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 34

Reverse Towne Projection

Purpose

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Slide 35

Reverse Towne Projection (Cont.)

Head position

Head tipped down

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Slide 36

Temporomandibular Joint Imaging

The joint includes the temporal bone and the

mandible.

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 37

Transcranial Projection

Purpose

To evaluate the superior surface of the condyle

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Slide 38

Transcranial Projection (Cont.)

Head position

Midsagittal plane perpendicular to the floor and

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Slide 39

Temporomandibular Joint Tomography

Used to examine the temporomandibular joint

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Dental Radiography: Principles and Techniques, 5th Edition

Chapter 23 Student Handout

Slide 40

Questions?

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