TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
23 Extraoral Imaging
CHAPTER LESSON PLAN & OBJECTIVES
Lesson 23.1: Extraoral Imaging
1. Define the key terms associated with extraoral imaging.
2. Describe the purpose and uses of extraoral imaging.
CHAPTER TEACHING FOCUS
• Students will have the opportunity to understand receptor exposure problems.
Chapter 23: Extraoral Imaging 2
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
CHAPTER PRETEST
Have the students answer these questions prior to covering this chapter to understand where they stand
in relation to the content.
1) Extraoral images are primarily used in which of the following specialty areas?
a) Pediatric dentistry
b) Endodontics c) Oral surgery
d) Periodontics
2) The extraoral image is typically used to evaluate:
a) gutta-percha root canal fillings.
b) interproximal decay. c) integrity of the crest of alveolar bone.
d) the temporomandibular joint area.
3) Scatter radiation:
a) increases film fog.
b) increases image contrast. c) increases image density.
d) doesn’t occur.
4) A(n) ______ is a device used to reduce the amount of scatter radiation that reaches an extraoral film
during exposure.
a) collimator
b) grid c) cassette
d) intensifying screen
8) Which of the following projections is used to evaluate fractures of the zygomatic arch?
a) Lateral cephalometric
b) Posteroanterior c) Waters
d) Submentovertex
9) An extraoral image is placed ______ the mouth during x-ray exposure. Extraoral imaging is used
to image ______ areas of the skull or jaws.
a) outside; large
b) outside; small c) inside; small
d) outside; small
10) Which of the following is the most commonly used extraoral film size?
a) 10 × 12
b) 3 × 5 c) 8 × 10
d) 4 × 6
Chapter 23: Extraoral Imaging 3
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
CHAPTER PRETEST ANSWERS
1) c
In dental specialty practices such as oral surgery and orthodontics, it is commonplace for additional
extraoral projections to be utilized.
p. 263
7) d
The left side of the patient’s head is positioned adjacent to the receptor in the lateral cephalometric
projection.
p. 266
Chapter 23: Extraoral Imaging 4
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Classroom Preparation
Lesson 23.1: Extraoral Imaging
INSTRUCTOR PREPARATION
Textbook Objectives Covered
1. Define the key terms associated with extraoral imaging.
National Standards Covered
ABHES DAI (Dental Assisting I – Basic)
• Section A: Curriculum, Competencies, Externship and/or Internal Clinical Experience:
• Clinical equipment function and maintenance: Operate dental equipment according to
ABHES DAII (Dental Assisting II – Advanced)
• Section A: Curriculum, Competencies, Externship and/or Internal Clinical Experience:
• Clinical equipment function and maintenance: Operate dental equipment according to
CODA Standards for Dental Assisting Programs
• Standard 2: Educational Program:
• The curriculum must include content at the in-depth level in dental radiology. Students must
CODA Standards for Dental Hygiene Programs
• Standard 2: Educational Program:
• Curriculum content: Dental sciences content must include tooth morphology, head, neck and oral
Chapter 23: Extraoral Imaging 5
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Lesson Preparation Checklist
Materials and Supplies
• computer
Chapter 23: Extraoral Imaging 6
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Classroom Preparation
Lesson 23.1: Extraoral Imaging
STUDENT PREPARATION (6 hrs)
1
PREPARE
• Have students make flash cards with the key terms on one side and the definition on the
reverse. Bring cards to class for an activity.
READ – Textbook (pp. 263-271)
ANSWER – Workbook Module 4: Technique Basics
• Short Answer, question 1 (p. 161)
3
READ – Textbook (pp. 263-265)
PREPARE
• Ask students to bring in either photographs or copies of correctly identified equipment used in
panoramic radiography.
4
• Case Studies
READ – Textbook (p. 265)
• Procedure 23-1: Equipment Preparation for Extraoral Imaging (p. 265)
Chapter 23: Extraoral Imaging 7
TEACH Lesson Plan
50–Minute Lesson Plan
Lesson 23.1: Extraoral Imaging
LECTURE OUTLINE (35 min)
EQUIPMENT: SLIDES 7-13 (pp. 263–265)
• Describe the equipment used in extraoral imaging.
1
&
KEY TERMS AND USES OF EXTRAORAL IMAGING: SLIDES 4-6 (pp. 263–271)
• Discuss the key terms associated with extraoral imaging.
• Describe the purpose and uses of extraoral imaging.
LEARNING ACTIVITIES (choose one or more to equal 15 min)
1
&
2
REVIEW (10 min)
• Using the key terms flash cards that the students completed as a homework assignment, have
the students quiz each other. Correct their pronunciation as needed.
• Appropriate Settings: Traditional classroom, flipped classroom
• Appropriate Settings: Traditional classroom, flipped classroom
4
DEMONSTRATE
• See the Simulations activities at the end of this Lesson Plan.
5
DEMONSTRATE
• See the Simulations activities at the end of this Lesson Plan.
Chapter 23: Extraoral Imaging 8
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
CRITICAL THINKING QUESTION
A 22-year-old man came into the office with jaw joint pain. He complained about a lot of
discomfort in both ears, and about having trouble opening and closing his mouth. The patient
also said that he heard popping and clicking sounds when he ate. What procedures could be
performed to help diagnose the problem?
Discussion Guidelines: The patient is experiencing discomfort associated with his temporomandibular
Chapter 23: Extraoral Imaging 9
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Assessments
Chapter 23: Extraoral Imaging
ASSESSMENTS BY OBJECTIVE
1
Workbook Module 4: Technique Basics
• Short Answer, question 1 (p. 161)
2
3
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 6-10, 12-16
• Critical Thinking Question 6 (p. 166)
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 1, 4, 5
Chapter 23: Extraoral Imaging 10
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Simulations
Chapter 23: Extraoral Imaging
SIMULATIONS BY OBJECTIVE
Equipment and Patient Preparation for Extraoral Imaging (30 min)
4
Equipment Needed
• double-sided lead apron
• extraoral cassette and screens
the students practice the steps.
Patient Positioning for Extraoral Projection Imaging (15 min)
5
Equipment Needed
• double-sided lead apron
• receptors