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06 July 2023

ADA calls for more conservative approach to treat tooth decay


A new American Dental Association (ADA) clinical practice guideline released June 26 said that conservative methods to treat tooth decay in primary and permanent teeth could lead to better outcomes when used with common restorative materials like fillings or caps. An expert panel of dentists developed the first-ever guideline on this topic after extensive review of approximately 300 published studies, according to a news release.

The guideline, published in the July issue of The Journal of the American Dental Association, contains 16 recommendations regarding treatment of moderate and advanced tooth decay in primary and permanent teeth that have not received endodontic treatment, such as a root canal. It indicates conservative carious tissue removal (CTR) – in which a dentist removes infected tissue while preserving as much of the original tooth structure as possible – is less likely to result in adverse outcomes like nerve exposure or a failed filling. 

The recommendations also identify selective CTR as an effective treatment option in most cases of moderate or advanced decay in primary and permanent teeth. This method involves removing most, but not all, of the decayed tissue before sealing the tooth with a filling or cap. The bacteria left behind under the new filling or cap no longer has what it needs to multiply, which stops tooth decay.  

Additionally, the guideline affirms the efficacy of the most common restorative materials for treating moderate or advanced tooth decay, such as tooth-colored fillings, silver-colored fillings (amalgam) or preformed caps in children. It suggests specific materials for primary and permanent teeth depending on the extent of the decay.

Lead author Vineet Dhar, B.D.S., M.D.S., Ph.D., is clinical professor and chair of orthodontics and pediatric dentistry at the University of Maryland School of Dentistry and a member of the ADA Council on Scientific Affairs. He said in a news release that the recommendation encapsulates restorative dentistry’s two main objectives: maintaining healthy tooth structure and protecting the soft tissue inside the tooth.

“While research had already confirmed that selectively removing decayed tissue is an effective approach to treating early tooth decay, dentists needed an evidence-based guideline to provide them with a range of treatment choices for patients with moderate to advanced tooth decay,” Dhar said. “These recommendations can now inform restorative care strategies in the U.S. and on a global level.”

This is the ADA’s second clinical practice guideline in a series on caries treatment. The new guideline was developed by the ADA Council on Scientific Affairs and the Clinical and Translation Research team within the ADA Science and Research Institute, which convened a panel of experts to review the best-available scientific evidence around treatments and materials. The new restoration guideline and existing recommendations on non-restorative treatment for tooth decay can be found at ada.org/cariesguidelines.

About the American Dental Association 

The not-for-profit ADA is the nation's largest dental association, representing 159,000 dentist members. The premier source of oral health information, the ADA has advocated for the public's health and promoted the art and science of dentistry since 1859. The ADA's state-of-the-art research facilities develop and test dental products and materials that have advanced the practice of dentistry and made the patient experience more positive. The ADA Seal of Acceptance has long been a valuable and respected guide to consumer dental care products. The Journal of the American Dental Association (JADA), published monthly, is the ADA's flagship publication and the best-read scientific journal in dentistry. For more information about the ADA, visit ADA.org. For more information on oral health, including prevention, care and treatment of dental disease, visit the ADA's consumer website MouthHealthy.org.

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