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06-5631-19003: Advanced Radiology

Course Abstract:

Contact Hours (CEs): The Academy of Dental Learning and OSHA Training, LLC, designates this activity for 6 continuing education credits (6 CEs).
Cost: $60
Questions? Contact Us: Phone: 800-522-1207, Fax: 800-886-3009, or Email:
Published: October 2012
Updated: October 2019
Expires: October 2022
Pages: 83
Course Instructor: Martin S. Spiller, DMD
Health Science Editor: Megan Wright, RDH, MS
No conflicts of interest are reported by the authors or by educational planning committee members.

Educational Objectives

  • Understand kilovoltage and millamperage settings.
  • Understand effects of and practical aspects of radiation safety.
  • Understand guidelines for prescribing and film placement techniques of radiographic surveys.
  • List qualities of excellent x-rays.
  • List common errors and infection control methods.
  • Understand shadow casting principles and tricks.
  • Understand the Clark Shift.
  • Understand CT and cone beam technology.

Course Description

This course begins with a historical summary describing how x-rays were discovered, principles of x-radiation, how x-ray tubes are built and how they work, and the effects and practical aspects of radiation safety. It continues to include common dental imaging terminology, guidelines for prescribing radiographs, intraoral placement techniques, descriptions of various radiographic surveys, and patient management techniques including how to control gagging. The course discusses film processing principles, mounting, infection control, and common errors. It provides information regarding qualities of excellent radiographs and useful techniques that, if mastered, ensure quality x-rays. Shadow casting principles, techniques, and tricks are discussed. Readers are informed how to bisect an angle which overcomes x-ray distortions, and also how to move objects on a radiograph. The Clark Shift and its relation to orthographic surveys is discussed as well as principles of digital radiographic systems, tomography, CT scanning and finally, cone beam computerized tomography. The impact and safety of sensors versus films, and how digital radiography is still creating new technology and impacting dentistry today is also reviewed. Legal ramifications of having and using these technologies in the dental office and a glossary of radiographic terms are included at the end of the course.

About the Authors

Dr. Martin Spiller graduated in 1978 from Tufts School of Dental Medicine. He is licensed in the state of Massachusetts and has been practicing general dentistry in Townsend, MA since 1984. Upon graduation from dental school, Dr. Spiller spent four years as a U.S. Army officer. During this time he attended a dental general practice residency in which he received training in numerous dental specialties including: oral surgery, endodontics, pedodontics, and orofacial surgical techniques and facial trauma. In 2000, he began work on a general dentistry website ( The intention at first was to educate the general public about dental procedures and the concepts behind them. Eventually, the website became popular with dental professional Students. Dr. Spiller was asked to write this course based on academic study, hard won experience in the practice of dentistry, and his proven ability to write clear and concise content.

Ms. Wright is a continuing education editor and writer as well as a Temp PRN with agencies in the Washington State area. Ms. Wright earned her MS at the UNM and Pierce College of Washington State in 1997 and certification in Utilization of the 970 Diode Laser and Safety in Dentistry in February of 2015. Ms. Wright works to implement Dental Education seminars as a Hospital-Dental Liaison building collaborative, mutual efforts to promote patient wellness between medical practitioners and dentists while prioritizing care for untreated, medially compromised patients.

How to Take This Course

Click on the logo below to open the course book. Study the course then return to this page and click to Take the Exam. Upon successful completion of the exam you will be asked to register and pay over a secure connection. Your exam will grade automatically and your certificate will display for you to save and/or print for your records.

Contact Hours: 6.00
Price: $60.00

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