CD-4 Barrier or Sieve - Are Resin-Based Materials Appropriate Canal Orifice Barriers for Establishing Coronal Seal?

4.8 (10 votes)

CE Hours: 1.0

Description: An intact coronal seal is important for maintaining the integrity of a root canal filling and preventing reinfection. Coronal leakage provides a source of viable microorganisms and nutrients that initiate and sustain periradicular inflammation. Despite research supporting the effectiveness of coronal barriers, a universally accepted protocol that incorporates a coronal barrier after root canal treatment is non-existent. Different materials have been advocated for use as canal orifice barriers, including temporary or intermediate filling materials, zinc oxide-eugenol cements, amalgam, glass-ionomer cements, resin composites, flowable resin liners and tricalcium silicate cements. While each of these materials has its own benefits and limitations, the appropriateness of using resin-based materials as long-term canal orifice barriers will be examined in this presentation by correlating their barrier properties with their physicochemical and antibacterial characteristics, as well as the durability of the bonds created in dentin to retain these materials.

  • State the rationale for placement of a coronal seal immediately after root canal treatment.
  • Identify the merits and limitations of using resin-based materials as canal orifice barriers.
  • Perform a reasonably durable coronal seal using an antibacterial self-etch adhesive and a radiopaque resin composite.


Open to view video.
9 Questions
CE Test
5 Questions  |  Unlimited attempts  |  4/5 points to pass
5 Questions  |  Unlimited attempts  |  4/5 points to pass
1.00 CE credit  |  Certificate available
1.00 CE credit  |  Certificate available

Franklin Tay, B.D.S., PhD

FRANKLIN R. TAY, BDSC (HONS), PHD, Department chair, Department of Endodontics, The Dental College of Georgia at Augusta University University, Dr. Frank Tay received his BDSc with first class honors from the University of Queensland School of Dentistry in Australia in 1981, his Ph.D. from The University of Hong Kong in China in 1997 and his endodontic residency from the Medical College of Georgia, USA in 2007. He is a Diplomate of the American Board of Endodontics. He is currently Chairman and Professor of the Department of Endodontics, The Dental College of Georgia at Augusta University, Georgia, USA. Dr. Tay is a member of the Honor Society of Phi Kappa Phi. He serves as Associate Editors for the Journal of Endodontics and Journal of Dentistry. His research interests include collagen biomineralization, remineralization of resin-dentin bonds, antimicrobial sol-gel chemistry, mesoporous silica and endodontic materials. He is a Fellow of the Academy of Dental Materials and has published more than 600 papers in peer-reviewed journals. As of September 2020, Dr. Tay’s H-index is 102.

Franklin Tay, B.D.S., PhD

I declare that I have no proprietary, financial, or other personal interest of any nature or kind in any product, service, course, and/or company, or in any firm beneficially associated therewith, that will be discussed or considered during the proposed presentation