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Quantitative Percussion Diagnostics: An Academy of Microscope Enhanced Dentistry Insider's Look

Cherilyn Sheets, DDS Presenter

  • Time Scheduled: October 21, 2017
  • AMED Designates this activity for 1.5 hour(s) CDE
  • Self-instructional Activity
  • Video Length:

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The discovery in 1993 of mechanical principles that allowed a predictive reversal of natural tooth intrusion associated with dental implants started a two decades journey into research on biomechanical principles of implants and teeth co-existing in the oral cavity. A disruptive technology, quantitative percussion diagnostics, was originally developed to prove the tooth intrusion hypothesis published in 1993. The follow on paper in 1997 introduced a medical device that could mechanically test teeth and implants to establish discrete levels of structural stability. Further, it could monitor the sites for damage in a non-destructive, pain free, rapid and reproducible manner.

Quantitative percussion testing allows a clinician to evaluate the structural stability of natural teeth or dental implants by measuring the micro-movement created from a light impact on the buccal surface. The energy that is returned to the hand piece is analyzed in a manner that provides quantitative metrics on the structured stability of the site during mastication and parafunction. This information can give the clinician indications of how sound the tested structure is. Physiological micromovement is produced by a normal periodontal ligament or bone. Pathological micromovement is produced by defects that create movement directly adjacent to the structure or internal to the tooth or implant. Armed with this knowledge, the clinician will be prepared to look for potential problems where abnormal results are observed. Additionally, patients become educated on the bioengineering challenges that some teeth or implants present due to internal defects and have a more realistic perspective on longevity of results and need for preventive compliance.


  • Understand how percussion can be a diagnostic risk assessment aid.
  • Review the scientific foundation and latest developments in research of QPD.
  • Understand the clinical possibilities and uses of QPD, such as identifying cracks or other damage in teeth or weak/failing implants.

Lecture Introduction:

1.5 CDE

AMED is an ADA CERP recognized provider.

Cherilyn Sheets, DDS has no relevant commercial relationships.

Release Date: October 21, 2017
*Expiration Date: October 21, 2020

*Self-instructional activities are reviewed at least once every three years, or more frequently if indicated by new scientific developments, to ensure that content is current and accurate.

AMED is an ADA CERP recognized provider
ADA CERP is a service of the American Dental Association to assist dental professionals in identifying quality providers of continuing dental education. ADA CERP does not approve or endorse individual courses or instructors, nor does it imply acceptance of credit hours by boards of dentistry.

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Cherilyn Sheets, DDS
Newport Beach, CA 92660


Dr. Cherilyn Sheets is an educator, clinician, author and lecturer, both nationally and internationally. She is Co-Executive Director of the Newport Coast Oral Facial Institute, an international non-profit teaching and research center. She is also a Clinical Professor of Restorative Dentistry at the USC School of Dentistry and is on their Board of Councilors. Dr. Sheets is a Past President of the American Academy of Esthetic Dentistry and the American Association of Women Dentists. She is also a Fellow in the Academy of General Dentistry, American College of Dentists, International College of Dentists, Academy of Dentistry International, and the Pierre Fauchard Academy of Dentistry. She received the 2002 Gordon Christensen Award for Excellence in Lecturing, the 2004 USC School of Dentistry Alumnus of the Year Award, and the 2006 Section of Honor Award (Distinguished Dentist Award) from the California Section of the Pierre Fauchard International Honor Dental Academy. Dr. Sheets is co-principal of research project on dental implants and cracked teeth with James C. Earthman, PhD at the UCI School of Engineering. Dr. Sheets has authored over 100 articles and has co-authored numerous textbook chapters.

Dr. Sheets serves on numerous editorial boards of peer-reviewed journals. She is the Founder and Chairman Emeritus of The Children's Dental Center in Inglewood, California, which is a non-profit prototype dental center for providing multidisciplinary care to children of the working poor. She is also the Founding Chairman of the Board of the National Children's Oral Health Foundation.

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