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CCOG for DH 109 Winter 2024

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Course Number:
DH 109
Course Title:
Dental Radiology I
Credit Hours:
Lecture Hours:
Lecture/Lab Hours:
Lab Hours:

Course Description

Covers basic theory of dental radiography. Includes intra-oral techniques with emphasis on radiation safety practices and techniques. Corequisites: DH 109L.

Addendum to Course Description

DH 109L will provide basic knowledge and skill in radiation physics, function and operation of dental x-ray equipment, intraoral and selected extraoral radiographic exposure techniques, dental film composition, handling and processing procedures as well as radiograph interpretation.  In addition, the student will develop knowledge of the biological effects of radiation and demonstrate an understanding of safety principles for both operator and patients.  The student will spend 3 hours per week in laboratory sessions learning exposure techniques on manikins and processing of films.  This course meets specific graduation requirements and is a prerequisite to DH 210, Advanced Radiographic Techniques.  Co-requisite DH 109 Lecture.

Intended Outcomes for the course

Upon successful completion, students should be able to:

  1. Understand, relate, and apply radiographic principles and techniques by exposing appropriate diagnostic intraoral radiographs that utilize radiation health and safety standards for the operator and patient.
  2. Recognize and relate radiology theory and application in preparation for these tested portions on the Dental Hygiene National Board.

Outcome Assessment Strategies

  1. Three (3) multiple choice tests
  2. Completion of four (4) online EC courses

  3. Comprehensive Final Exam.

Course Content (Themes, Concepts, Issues and Skills)

Course Content (Themes, Concepts and Issues)

  • Radiation Physics

  • Dental X-ray Machine Function and Operation

  • Intraoral Radiographic Exposure Technique

  • Dental X-ray Film and Film Processing

  • Intraoral Landmarks and Dental Materials Seen on Radiographs

  • The ALARA Concept

  • Patient Education and Communication

  • Operator and Patient Safety and Protection

  • Preventing Exposure and Darkroom Errors

  • Biological Effects of X-rays

  • Balancing Safety with Need for Diagnostic Radiographs

  • Legal Aspect of Radiography


  1. Understand Radiation Health and Safety Standards and OSHA Guidelines while exposingand processing diagnostic radiographs.
  2. Assess patient radiographic needs.
  3. Understand how to expose and process diagnostic intra-oral radiographs.
  4. Understand how to mount, label and document radiograph exposures accurately.
  5. Self critique work and discuss improvement and corrections needed.
  6. Use inquiry and listening communication skills
  7. Utilize critical thinking, decision- making, and time management skills.
  8. Access professional and research resources.