TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
18 Bisecting Technique
CHAPTER LESSON PLAN & OBJECTIVES
Lesson 18.1: Bisecting Technique
1. Define the key terms associated with the bisecting technique.
2. State the rule of isometry.
3. State the basic principles of the bisecting technique and illustrate the location of the receptor, tooth,
imaginary bisector, central ray, and position-indicating device (PID).
4. List the beam alignment devices and receptor holders that can be used with the bisecting technique.
5. Describe the receptor size used with the bisecting technique.
CHAPTER TEACHING FOCUS
• Students will have the opportunity to learn about the basic concepts and describe patient preparation,
Chapter 18: Bisecting Technique 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) Using the bisecting technique, what is the proper position of the patient during exposure?
a) Midsagittal plane parallel to the floor
b) Supine c) Midsagittal plane perpendicular to the
floor
d) Subsupine
2) The rule of isometry states that two triangles are equal if they have ______ equal angles and share a
common side.
a) four
b) two c) three
d) one
3) The primary disadvantage of the bisecting technique when contrasted with the paralleling technique
is:
a) longer exposure times.
b) greater magnification. c) dimensional distortion.
d) requirement of a film holder.
4) For the maxillary premolar exposure, the front edge of the receptor should be aligned with the midline
of the maxillary:
a) canine.
b) lateral incisor. c) second bicuspid.
d) first bicuspid.
5) Using the bisecting technique, what is the proper vertical angulation for maxillary premolar
radiographs?
a) +50 to +55
b) +30 to +40 c) +45 to +55
d) +40 to +50
6) When the bisecting technique is used, the receptor must be placed along the _______ surface of the
tooth.
a) buccal
b) lingual c) mesial
d) distal
9) The primary benefit of using beam alignment devices with the bisecting technique is:
a) assisting in determining vertical
angulation.
b) reducing the patient’s exposure to
radiation.
c) helping minimize cone cuts.
d) allowing the operator to have the
receptor parallel to the long axis of the
tooth.
10) When Rinn BAI instruments are used, “BAI” refers to which of the following?
a) Bisecting, aiming, instrument
b) Bisecting angle instrument c) Both angle integration
d) Bisecting, angle, integration
Chapter 18: Bisecting Technique 3
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
CHAPTER PRETEST ANSWERS
1) c
Position the patient’s head such that the arch that is being imaged is parallel to the floor and the
midsagittal plane is perpendicular to the floor.
p. 182
6) b
The receptor must be placed against the lingual surface of the tooth.
p. 179
Chapter 18: Bisecting Technique 4
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Classroom Preparation
Lesson 18.1: Bisecting Technique
INSTRUCTOR PREPARATION
Textbook Objectives Covered
1. Define the key terms associated with the bisecting technique.
2. State the rule of isometry.
3. State the basic principles of the bisecting technique and illustrate the location of the receptor, tooth,
imaginary bisector, central ray, and position-indicating device (PID).
4. List the beam alignment devices and receptor holders that can be used with the bisecting technique.
5. Describe the receptor size used with the bisecting technique.
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
Chapter 18: Bisecting Technique 5
TEACH Lesson Plan
National Standards Covered (Continued)
CODA Standards for Dental Hygiene Programs
• Standard 2: Educational Program:
Lesson Preparation Checklist
• Prepare lecture from TEACH lecture slides available on Evolve.
Materials and Supplies
• computer
Instructor Note
Chapter 18: Bisecting Technique 6
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Classroom Preparation
Lesson 18.1: Bisecting Technique
STUDENT PREPARATION (8* hrs)
1
READ – Textbook (pp. 175-183)
PREPARE
• Have students make flash cards with the key terms on one side and the definitions on the
reverse. Bring cards to class for an activity.
• Quiz Questions: Essay, question 20 (p. 196)
READ – Textbook (pp. 176-177)
• Identify and Describe: Bisecting Technique, questions 1, 2 (p. 123)
4
READ – Textbook (pp. 177-178)
ANSWER – Textbook
• Quiz Questions:
• Matching, questions 1-4 (p. 194)
• Short Answer, question 13 (p. 194)
• Quiz Questions: Essay, question 26 (p. 196)
• Quiz Questions: Identification, questions 5-10 (p. 194)
8
READ – Textbook (pp. 179, 180, 181)
• Figure 18-12, p. 180
• Figure 18-13, p. 181
ANSWER – Textbook
• Quiz Questions: Essay, questions 27, 28 (p. 196)
ANSWER – Workbook Module 4: Technique Basics
• Identify and Describe: PID Angulation, questions 1, 2 (pp. 123-124)
• Multiple Choice: Elongation and Foreshortening, questions 1-9 (p. 124)
Chapter 18: Bisecting Technique 7
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
STUDENT PREPARATION (8* hrs) (Continued)
10
READ – Textbook (pp. 179-182)
• Procedure 18-1: Patient Preparation for Bisecting Technique (p. 182)
• Procedure 18-2: Equipment Preparation for Bisecting Technique (p. 182)
ANSWER – Textbook
• Quiz Questions:
• Short Answer, questions 14, 15 (p. 195)
• Essay, question 23 (p. 196)
• Procedure 18-8: Maxillary Molar Exposure: Bisecting Technique (p. 190)
12
READ – Textbook (pp. 183-184)
13
READ – Textbook (pp. 183-184, 193-194)
ANSWER – Textbook
• Quiz Questions: Multiple Choice, questions 18, 19 (p. 195)
REVIEW – Evolve Student Resources
• Additional Case Scenarios
Chapter 18: Bisecting Technique 8
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
50-Minute Lesson Plan
Lesson 18.1: Bisecting Technique
LECTURE OUTLINE (25 min)
5
HORIZONTAL ANGULATION: SLIDES 13–14 (pp. 178-179)
7
1
&
KEY TERMS AND RULE OF ISOMETRY: SLIDES 5-9 (pp. 175–183)
• Discuss the key terms associated with the bisecting technique.
8
PERIAPICAL EXPOSURES: SLIDE 17 (pp. 179, 180, 181)
• Discuss each of the recommended vertical angulation ranges used for periapical exposures in
the bisecting technique.
9
PERIAPICAL RECEPTOR PLACEMENTS: SLIDES 25–27 (pp. 183-184)
• Describe each of the 14 periapical receptor placements recommended for use in the bisecting
ADVANTAGES AND DISADVANTAGES OF BISECTING TECHNIQUE: SLIDE 28
RULES OF BISECTING TECHNIQUE: SLIDE 18 (p. 179)
LEARNING ACTIVITIES (choose one or more to equal 25 min)
1
&
2
REVIEW (20 min each)
• Using the key term flash cards the students created as a homework assignment, have the
students quiz one another with the flash cards. Correct their pronunciation as needed.
• Appropriate Settings: Traditional classroom, flipped classroom
• Divide the class into small groups. Have each group draw a diagram displaying the rule of
isometry. Have the students share and present their diagrams with the class for discussion.
Chapter 18: Bisecting Technique 9
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
LEARNING ACTIVITIES (choose one or more to equal 25 min) (Continued)
4
PRACTICE
• See the Simulations activities at the end of this Lesson Plan.
5
• Appropriate Settings: Traditional classroom, flipped classroom
chart with the class for further discussion.
• Appropriate Settings: Traditional classroom, flipped classroom
8
PRACTICE
DISCUSS (15 min)
• Show students the different-sized films that are available for intraoral radiography (#0, #1, #2,
#3, #4). Then as a class, discuss the appropriate uses for each of the film sizes.
• See the Simulations activities at the end of this Lesson Plan.
9
REVIEW (15 min)
• Divide the class into five groups. Assign each group one of the five rules for bisecting
technique. Have each group diagram its rule and present it to the class.
• Appropriate Settings: Traditional classroom, flipped classroom
10
PRACTICE
• See the Simulations activities at the end of this Lesson Plan.
11
• See the Simulations activities at the end of this Lesson Plan.
PRACTICE
Chapter 18: Bisecting Technique 10
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
CRITICAL THINKING QUESTIONS
1. As the lead assistant in your office, it is your responsibility to train new staff. A new assistant
has just started in the office and she is unfamiliar with the bisecting technique. What can you do
to help her master the skill?
Discussion Guidelines: Before exposing any dental images using the bisecting technique, infection
control procedures must be completed. After completion of infection control procedures and preparation
2. Now that you have explained the patient and equipment preparations to the new assistant, what
can you tell her about how she should place the receptors?
Discussion Guidelines: When exposing a complete mouth series using the bisecting technique, each
Chapter 18: Bisecting Technique 11
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Assessments
Chapter 18: Bisecting Technique
ASSESSMENTS BY OBJECTIVE
2
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 1-4
3
Workbook Module 4: Technique Basics
• Identify and Describe: Bisecting Technique, questions 1, 2 (p. 123)
4
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 5, 6, 8-10
5
Evolve Instructor Resources
• Test Bank: Multiple Choice, question 11
• Test Bank: Multiple Choice, questions 12, 31
7
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 13-17, 26, 32
• Multiple Choice: Elongation and Foreshortening, questions 1-9 (p. 124)
9
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 18, 27, 33
10
Evolve Instructor Resources
• Test Bank: Multiple Choice, question 19
• Test Bank: Multiple Choice, questions 20-23
Evolve Instructor Resources
• Test Bank: Multiple Choice, questions 24, 25
Chapter 18: Bisecting Technique 12
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
Simulations
Chapter 18: Bisecting Technique
SIMULATIONS BY OBJECTIVE
Bisecting Technique (15 min)
3
Equipment Needed
• receptor holders
Use of Film Holder Devices (15 min)
4
Equipment Needed
• beam alignment devices, to include:
• BAI
• Stabe bite-block
• EeZee-Grip
Radiograph Placement Using Bisecting Technique (15 min)
8
Equipment Needed
• radiograph
bisecting technique and Table 18-1 (p. 179). Provide feedback as necessary.
Patient and Equipment Preparation Techniques (15 min each)
10
demonstration let each of the students practice the procedural steps.
Equipment Needed
• beam alignment device
• lead apron
• position-indicating device (PID)
• receptor holders
Chapter 18: Bisecting Technique 13
TEACH Lesson Plan
IANNUCCI AND HOWERTON: Dental Radiography: Principles and Techniques, 5th Edition
SIMULATIONS BY OBJECTIVE (Continued)
Receptor Placement Procedures Using Bisecting Technique (15 min each)
11
Equipment Needed
• beam alignment device
PRACTICE – Textbook
• Procedure 18-3: Maxillary Canine Exposure: Bisecting Technique (p. 185): Demonstrate to the
class the prescribed receptor placement procedures for maxillary canine exposures using
bisecting technique. After the demonstration let each of the students practice the procedural
steps.
• Procedure 18-7: Maxillary Premolar Exposure: Bisecting Technique (p. 189): Demonstrate to
the class the prescribed receptor placement procedures for maxillary premolar exposures using
bisecting technique. After the demonstration let each of the students practice the procedural
steps.
• Procedure 18-8: Maxillary Molar Exposure: Bisecting Technique (p. 190): Demonstrate to the
class the prescribed receptor placement procedures for maxillary molar exposures using