Master Class

Advanced Diagnostics For Dental Hygiene Practice Teaching Unit 4:

Diagnostics of Tooth Resorption

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Claiming Credits

To receive credits, participants must review the program materials in their entirety and complete the online post examination and evaluation. CME credits require a post examination score of 70% or higher. CE credits require a post examination score of 80% or higher.

System Hardware/Software and Internet Connection Requirements

The following information is provided for your reference in conjunction with review of this program.

General System and Internet Requirements:  Speakers or Headphones, High Speed Internet connection, Wireless 3G and 4G,
Web browsers: Internet Explorer 7.x or higher, Firefox 4.x or higher, Safari 2.x or higher and Chrome.

Operating Systems:  Windows 2000 or higher, (MS Surface and other MS mobile devices compatible), MAC OSX 10.3 or higher, Mac iOS 5.0 or higher (iPad, iPhone compatible), Android 4.3 or higher (most Android mobile devices compatible).

Effective Date: October 1, 2019
Expiration Date: October 1, 2022
Format: Self Instructional - Audio Visual Voice-Over with Slides
Estimated Completion Time: 1 hour

Program Summary

The dental school teaching considers Tooth resorption a "rare phenomenon" that affects the internal, external, or apical surfaces of teeth. The causes are physiologic, idiopathic, pathologic, or following orthodontic treatment. The Differential Diagnosis and treatment of the different types of root resorptions depends on the characteristics of the radiographic image of the resorption defect. 

 The current knowledge of root resorption is entirely different. Root resorption is no longer considered a rare phenomenon. Root resorption is a common iatrogenic, pathologic complication of substandard dental patient care. According to Tsesis et al., 2008, 71.2% of root resorption is of Endodontic etiology, followed by 14.6% of Orthodontic-etiology and 10.2% of Oral pathology etiology. Therefore, because the causes are known, most root resorption problems are preventable.

The author presents key academic concepts and suggestions on what should the patient be told when in the dental hygiene process of care, a dental hygienist encounters  a root resorption situation.  

The content of unit 4 empowers practicing dental hygienists with the academic knowledge and diagnostic skills to exercise their role as the primary providers of evidence-based preventive oral healthcare information and at the same time, assist and collaborate with dentists in the diagnostic aspects of patient care. 

Educational Objectives

Unit 4 content has been organized to achieve the following objectives:

  1. Describe the current knowledge of root resorption in modern dentistry.
  2. Diagnose root resorption problems with the 4R operational diagnosis protocol.  
  3. Describe the author's classification of the problem- based root resorption
  4. Outline what the dental hygienist should tell the Patient about the different types of root resorption 

Target Audience

The target audience for this course is Dental Hygienists and Dentists from novice to advanced. No prerequisites required.


Marwan Abou-Rass DDS. MDS. Ph.D

Marwan Abou-Rass DDS, MDS, Ph.D

Professor Emeritus,
Herman Ostrow School of Dentistry
University of Southern California

Dr. Abou-Rass brings nearly fifty years of cutting edge innovations in the fields of endodontics and dental education. His Doctorate Research pioneered the concept of teaching molar versus central teeth as the best sequence for learning endodontic skills.

In Clinical Endodontics, Dr. Abou-Rass has made several significant new concept and methodology contributions, including:

  • Critical Error Approach For Clinical Performance Evaluation In Dentistry
  • Stressed Pulp Concept
  • Anti-Curvature Filing Method (ACF)
  • 4R Operational Diagnosis Protocol (4ROD)
  • The 10 Areas Of Diagnostic Interest (The10 ADI)
  • Composite Post And Core Buildup Protocol
  • Endodontic Treatment Finalization Protocol
  • Interim Endodontic Therapy For Native Bone Regeneration Before Implant Placement
  • Best Practices In Cracked Teeth Management. 13.5 Hours Master Class Series
  • Advanced Diagnostics For Dental Hygiene Practice. 6 Hours. Master Class Series

In addition to his DDS, Dr. Abou-Rass holds a Master's degree in Dental Science in Prosthodontics, a certificate in Endodontics and a Ph.D., in Higher Education from the University of Pittsburgh, Pennsylvania. Dr. Abou-Rass served as Endodontic Department Chairman and Director of the Advanced Endodontic program at the University of Southern California, School of Dentistry (1971-2000). Dr. Abou-Rass moved to Riyadh, Saudi Arabia, in 2000, where he directed the AEGD program at PAADI from 2000 to 2012. Currently a USC Professor Emeritus, a practicing endodontist and Publisher of the Abou-Rass Master Class Series in Endodontics and Dental Hygiene Education.

Recognition and Credits

ADA CERP and PennWell Logos

PennWell Corporation 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.

Continuing education credits awarded for participating in the CE activity may or may not apply toward license renewal or specific license requirements in all states. It is the responsibility of each participant to verify the requirements of his/her state licensing board(s).

PennWell designates this activity for 1 credit hour of continuing education credits.

Concerns or complaints about a CE provider may be directed to the provider or to ADA CERP at

AGD PACE LogoThe PennWell Corporation is designated as an Approved PACE Program Provider by the Academy of General Dentistry. The formal continuing dental education programs of this program provider are accepted by the AGD for Fellowship, Mastership and membership maintenance credit. Approval does not imply acceptance by a state or provincial board of dentistry or AGD endorsement. The current term of approval extends from (11/1/2015) to (12/31/2019) Provider ID# 320452.

Dental Board of California: Provider 4527, course registration number 03-4527-15228.
“This course meets the Dental Board of California’s requirements for 1 unit of continuing education.”

Requirements For Successful Completion

To receive credit for your participation in this webinar you will be required to complete the online program examination. To complete the online examination participants must be registered and signed-in to this website and have reviewed the program in its entirety. At the end of the program a link will be provided directing you to the program course exam. Once completed and submitted an immediate grade report will be displayed. All participants scoring at least 70% on the examination will receive a CE Verification Form verifying 3 CE credits. Verification forms may be viewed and printed immediately as well as accessed anytime in the future (24/7) from within the user records page of this website.

Not enough time to complete your online examination? No problem, online examinations may be completed anytime during the effective period of the program. Participants requiring more time to complete an examination may return to this website, sign-in and complete the online examination.

Disclosure Declaration

Presenter Disclosure: Dr. Abou-Rass, has no financial interest in any of the products or manufacturers mentioned

Commercial Support: This course was developed without commercial support.

Provider Disclosure: PennWell does not have a leadership position or a commercial interest in any products or services discussed or shared in this educational activity, No manufacturer or third party has had any input into the development of course content.

CE Planner Disclosure: Laura Winfield, CE Coordinator does not have a leadership or commercial interest with any commercial supporter, or with products or services discussed in this educational activity. Heather can be reached at

Image Authenticity: No images in this educational activity have been modified or altered.

Scientific Basis: All content has been derived from references listed and/or the author’s clinical experience.

Known Benefits and Limitations: Information presented in this educational activity represents best practices in evidenced based dentistry with potential benefit for the patient and clinician. No off label or experimental treatments are discussed.

Educational Disclaimer: Completing a single continuing education course does not provide enough information to result in the participant being an expert in the field related to the course topic. It is a combination of many educational courses and clinical experience that allows the participant to develop skills and expertise.