I messaged a friend on her birthday recently, and asked her how her day had been. She told me she had had a lovely birthday, but added that she had had to visit the dentist on her special day.
The fear of dentists does not fade with each passing birthday. I am convinced that I am more afraid of going to the dentist as an adult than I was when I was a child; and I was pretty scared then. I remember going in for a dental procedure when my son was small and he gave me this advice: “You can wiggle your feet, just don’t wiggle your head.”
This really sums up the dental experience: sitting in a chair and holding your mouth open, while the sound of drilling fills the room
Treating tooth decay has traditionally meant drilling and filling and while this approach remains highly effective, it can be a frightening experience for young children… and adults, like me. This is especially true for those with extensive decay or dental anxiety. However, recent reports have announced a new method of stopping cavities, which does not involve drilling.
This new research suggests that there may be a simpler way to stop many cavities before they worsen, without the sound of a drill. A major U.S. clinical trial has found that silver diamine fluoride (SDF), a liquid which is simply brushed onto cavities in a matter of seconds, successfully halted tooth decay in more than half of treated baby teeth.
These findings offer hope that many children could avoid painful dental procedures, infections, and even surgery under general anaesthesia. Furthermore, the treatment is quick, inexpensive, and requires no drilling. This makes it an attractive option for dentists, parents, and public health providers alike.
What Is Silver Diamine Fluoride?
SDF is a topical liquid which combines two active ingredients with complementary roles. The silver acts as a powerful antimicrobial agent, killing the bacteria responsible for tooth decay, while the fluoride strengthens the tooth’s remaining structure by encouraging remineralisation. Together, these actions can stop an active cavity from progressing.
Unlike a traditional filling, SDF does not remove decayed tooth material or rebuild the tooth’s original shape. Instead, it arrests the decay, preventing it from becoming deeper or spreading further. Once applied, the treated cavity hardens, reducing the likelihood that it will continue to deteriorate.
The application itself takes only a few moments. After drying the tooth, the dentist or dental professional paints a small amount of the liquid directly onto the cavity using a tiny brush or applicator. No injections, drilling, or sedation are required.
Tooth decay remains one of the most common chronic childhood diseases worldwide. Left untreated, cavities can cause severe pain, infections, difficulty eating, speech problems, disturbed sleep, and missed school days.
For very young children, conventional dental treatment can sometimes present additional challenges. Some toddlers or preschool-aged children struggle to remain still during procedures involving drills or injections. When multiple teeth require treatment, dentists may recommend sedation or general anaesthesia to complete the work safely.
While these options are generally safe when medically appropriate, they involve additional costs, specialised facilities, and longer recovery times. In many communities, access to paediatric dental surgery is limited, leaving families facing lengthy waiting lists.
A treatment that can halt decay quickly in a dental clinic, community health centre, or school programme has the potential to dramatically improve access to care.
Researchers involved in the large U.S. study evaluated silver diamine fluoride as a treatment for cavities in primary, or baby, teeth. The results were encouraging in that more than half of the treated cavities stopped progressing after application.
This is significant because arresting decay can prevent the cavity from becoming painful or infected while allowing the baby tooth to remain functional until it naturally falls out. Since primary teeth help children chew, speak properly, and maintain space for permanent teeth, preserving them whenever possible is an important goal.
Although SDF may not eliminate the need for traditional fillings in every situation, the findings suggest that many early or moderate cavities can be managed effectively without invasive treatment.
One Important Drawback
Despite its many advantages, SDF has one well-known cosmetic limitation. While it successfully arrests a cavity, the decayed area typically turns black permanently. This dark staining is actually a sign that the decay has stopped, but it can be noticeable, particularly on front teeth.
For cavities on back molars, many parents consider this a worthwhile trade-off for avoiding drilling or surgery. However, when front teeth are involved, cosmetic concerns may influence treatment decisions.
Dentists usually discuss this expected staining with parents before recommending the treatment so they can make an informed choice.
Clearly though, prevention remains better than cure. Although silver diamine fluoride represents an exciting advance, preventing cavities remains far better than treating them.
Children benefit from brushing twice daily with fluoride toothpaste appropriate for their age, limiting sugary snacks and drinks, attending regular dental check-ups, and establishing healthy oral hygiene habits from an early age.
Regular examinations also allow dentists to detect early signs of decay before extensive damage occurs. The earlier a cavity is identified, the greater the chance that minimally invasive treatments can be used successfully.