Silver Diamine Fluoride (SDF) is a painless liquid treatment that can stop active tooth decay without drilling or injections. It combines silver, which kills cavity-causing bacteria, and fluoride, which strengthens the tooth and helps prevent further decay.
SDF does not repair a cavity like a filling, but it can arrest tooth decay and delay or even avoid more invasive treatment in carefully selected cases. The main trade-off is that it permanently turns the treated cavity black.
What Is Silver Diamine Fluoride?
Silver Diamine Fluoride is a liquid medication applied directly to a cavity. It is designed to stop active tooth decay from progressing while preserving as much healthy tooth structure as possible.
The treatment is quick, gentle, and especially useful for young children, anxious children, or those who may struggle with conventional dental treatment.
How Does SDF Work?
SDF works through two active ingredients.
Silver Stops Bacteria
Silver ions destroy the bacteria that cause tooth decay and help prevent the cavity from continuing to grow.
Fluoride Strengthens The Tooth
Fluoride helps remineralise weakened enamel and dentin, making the affected tooth stronger.
What Does “Arresting” A Cavity Mean?
SDF does not remove the decay or rebuild the missing tooth structure.
Instead, it stops the cavity from progressing, allowing the tooth to remain functional while reducing the risk of pain and infection.
Why Does SDF Turn Cavities Black?
This is the most important thing parents should know. When SDF reacts with decayed tooth tissue, it forms compounds that permanently darken the treated area. This colour change shows that the decay has been arrested.
Healthy tooth structure does not turn black. Because of this, SDF is often preferred for back teeth where the staining is less noticeable.
For front teeth, a tooth-coloured filling may sometimes be placed over the treated area if appearance is a concern.
Who Is Silver Diamine Fluoride Best For?
SDF may be an excellent option for:
- Children aged 1 to 4 with early childhood cavities.
- Children with dental anxiety.
- Children with special healthcare needs or sensory sensitivities.
- Children with multiple cavities.
- Baby teeth that will naturally fall out within the next few years.
- Families hoping to avoid treatment under general anaesthesia.
Every child should be assessed individually by a pediatric dentist before treatment is recommended.
When Is SDF Not Recommended?
SDF may not be suitable if:
- The cavity has reached the nerve.
- There is an abscess or active infection.
- The tooth cannot be restored.
- Your child has a rare silver allergy.
- The appearance of black staining on a front tooth would not be acceptable.
In these situations, treatments such as fillings, crowns, pulp therapy, or tooth extraction may be more appropriate.
What Happens During The Procedure?
The procedure is simple and usually takes only a few minutes.
Your pediatric dentist will:
- Examine the affected tooth.
- Isolate and dry the tooth.
- Protect nearby soft tissues if necessary.
- Apply a small amount of SDF with a tiny brush.
- Allow the liquid to absorb for about one minute.
There are:
- No drills.
- No injections.
- No local anaesthetic.
- Very little discomfort.
Some children notice a brief metallic taste that disappears quickly.
How Effective Is Silver Diamine Fluoride?
Research shows that SDF can arrest approximately 60% to 90% of cavities, especially when applied early and monitored regularly.
Success depends on:
- The size of the cavity.
- The location of the tooth.
- Good brushing and diet at home.
- Regular follow-up visits.
Many pediatric dentists recommend reviewing treated teeth every six months, with repeat applications if needed.
Is Silver Diamine Fluoride Safe?
Yes. SDF has been used internationally for decades and has a strong safety record.
It was cleared by the U.S. Food and Drug Administration (FDA) for tooth sensitivity in 2014 and has been widely used to arrest tooth decay since then.
Side effects are usually mild and temporary:
- Permanent black staining of the treated cavity.
- A brief metallic or bitter taste.
- Temporary staining of the gums or lips if the liquid touches soft tissue.
Serious reactions are extremely rare.
Does SDF Replace Fillings?
Not always. SDF stops active decay but does not restore the tooth’s original shape.
Some teeth remain healthy after SDF alone, while others may later require:
- Tooth-coloured fillings.
- Pediatric crowns.
- The Hall Technique.
- Tooth extraction if the tooth cannot be saved.
Your pediatric dentist will recommend the most conservative option for your child’s situation.
Does SDF Replace Good Oral Hygiene?
No. SDF treats existing cavities but does not prevent new ones from developing.
Children still need to:
- Brush twice daily with fluoride toothpaste.
- Floss once teeth touch.
- Limit sugary snacks and drinks.
- Attend regular dental checkups.
- Receive fluoride treatments or dental sealants when appropriate.
Silver Diamine Fluoride In Dubai
Although SDF is well established internationally, it is still not offered by every general dental clinic in Dubai.
Pediatric dentists are more likely to provide this treatment because it is particularly valuable for young children and those who would otherwise need extensive dental treatment.
In many Dubai clinics, SDF costs less than fillings, crowns, or treatment under general anaesthesia, although prices and insurance coverage vary.
Frequently Asked Questions
Does Silver Diamine Fluoride hurt?
No. SDF is painless and does not require drilling or injections.
Why does SDF turn teeth black?
Only the decayed part of the tooth turns black. This is a normal sign that the decay has been arrested.
Can SDF be used on front teeth?
It can, but the staining is visible. Some families choose a tooth-coloured restoration afterwards to improve appearance.
How long does SDF last?
Many teeth remain stable after treatment, but follow-up every six months is important. Some teeth benefit from repeat applications.
Is SDF better than a filling?
They serve different purposes. SDF stops decay without drilling, while a filling removes decay and rebuilds the tooth. The best option depends on your child’s age, the size of the cavity, and the condition of the tooth. See our full comparison of SDF vs fillings for more detail.
Can SDF help avoid general anaesthesia?
In some cases, yes. SDF can stop multiple cavities quickly, allowing young children to avoid or postpone treatment under general anaesthesia.