A Quick Brush-On Treatment Offers Hope for Children With Cavities
For a young child with a cavity, dental care may be simpler than many families expect. A large clinical trial found that silver diamine fluoride, or SDF, can stop decay in many baby teeth without drilling, injections, or sedation. Applied in seconds, the liquid could help children avoid pain and more involved treatment.
A dentist places SDF directly on the decayed area with a small sponge-tipped applicator. It does not fill the cavity or restore the tooth’s missing structure. Instead, it helps keep the damaged area from getting worse. Silver acts against bacteria associated with decay, while fluoride helps strengthen the tooth.
In a Phase III trial published in JAMA Pediatrics, researchers studied 830 children under age 6. The children were recruited through dental clinics, pediatric practices, and Head Start and Early Head Start programs in Michigan, New York, and Iowa. When a 38% SDF solution was applied every six months, decay stopped progressing in more than half of the affected baby teeth.
"This is a very effective and safe treatment -- even in children as young as 1," said Margherita Fontana, a University of Michigan dentistry professor who led the study.
A Gentler Option When Early Care Matters
A cavity that seems minor at first can eventually cause toothaches, infection, and difficulty eating or sleeping. For some young children, a conventional dental procedure is also hard to manage because they are frightened or cannot sit still long enough. SDF’s quick application may offer those families a welcome alternative.
The treatment has a visible tradeoff: it permanently darkens the decayed part of the tooth. That may matter most when the cavity is on a front tooth. Families and dental providers can weigh that cosmetic change against the possibility of avoiding a more invasive procedure.
SDF is not appropriate for every cavity, and a tooth treated with it may still need dental work later. In some cases, though, repeat applications could keep decay under control until a baby tooth falls out naturally. Fontana also noted its potential value for older adults, people with disabilities, patients with severe dental anxiety, and others who have difficulty getting conventional care.
Evidence That Could Bring Treatment Within Reach
Dentists in other countries have used SDF to manage cavities for decades. In the United States, the FDA approved it in 2014 for tooth sensitivity; dentists have also used it off-label to stop decay. The new trial adds large-scale evidence from U.S. children that could support an application for approval specifically for that purpose.
The study began in 2018 and continued through disruptions caused by the COVID-19 pandemic. Researchers from the University of Michigan, New York University, the University of Iowa, and Indiana University collaborated on the work, with more than $12 million in funding from the National Institute of Dental and Craniofacial Research. The trial used Advantage Arrest 38% SDF, supplied by Elevate Oral Care.
The researchers hope stronger evidence will help make SDF available to more children, including through pediatric medical settings. That could create an opportunity to address a cavity before it becomes painful while a family arranges ongoing dental care. Regulatory approval for arresting decay could also encourage wider use.
A few seconds with a brush-on liquid will not solve every dental problem. For many children, however, it could be a reassuring first step toward keeping a small cavity from becoming a much bigger one.
