If your child has a cavity, your pediatric dentist may recommend either Silver Diamine Fluoride (SDF) or a traditional dental filling. While both treatments manage tooth decay, they work in very different ways.
SDF stops (arrests) the cavity without drilling or injections, while a filling removes the decayed tooth structure and restores the tooth’s shape and function. The right choice depends on your child’s age, the size and location of the cavity, their ability to cooperate, and your family’s treatment goals.
What Is Silver Diamine Fluoride (SDF)?
Silver Diamine Fluoride, commonly called SDF, is a liquid medication used to stop active tooth decay.
A standard 38% SDF solution contains silver, fluoride, and ammonia:
- Silver kills cavity-causing bacteria.
- Fluoride strengthens weakened tooth structure.
- Ammonia keeps the solution stable.
Unlike a filling, SDF does not remove decay or rebuild the tooth. Instead, it hardens the affected area and prevents the cavity from getting worse.
Because SDF is applied with a small brush, it requires:
- No drilling.
- No injections.
- No local anaesthesia.
- Very little time.
What Is Dental Filling?
A dental filling is a restorative treatment that removes decayed tooth tissue and replaces it with a durable filling material.
Unlike SDF, a filling restores the tooth’s normal shape so it can function properly for chewing.
Composite Fillings
Composite fillings are tooth-coloured resin restorations that blend naturally with the surrounding tooth.
They are the most commonly used filling material for children today.
Glass Ionomer Fillings
Glass ionomer fillings release fluoride over time, making them a useful option for some baby teeth and children with a higher risk of cavities.
Amalgam Fillings
Dental amalgam is a durable silver-coloured filling material that has been used for decades. Although still considered safe by major dental organizations, it is used less frequently today because many families prefer tooth-coloured alternatives.
How Does Silver Diamine Fluoride Work?
SDF treats tooth decay in two important ways.
Silver Stops the Bacteria
Silver ions destroy cavity-causing bacteria such as Streptococcus mutans and help prevent bacterial growth inside the cavity.
Fluoride Strengthens the Tooth
Fluoride reacts with weakened enamel and dentin, helping the tooth become harder and more resistant to future decay.
Rather than removing the cavity, SDF arrests the decay process, allowing the tooth to remain stable.
Silver Diamine Fluoride vs Filling
| Feature | Silver Diamine Fluoride (SDF) | Dental Filling |
| Purpose | Stops cavity progression | Removes decay and restores the tooth |
| Drilling | No | Usually yes |
| Local anaesthesia | Usually not required | Often required |
| Pain | Usually painless | Mild discomfort possible |
| Treatment time | 1–3 minutes per tooth | 20–45 minutes or more |
| Appearance | Treated decay turns black | Tooth-coloured (composite) available |
| Tooth structure removed | No | Yes |
| Longevity | Requires monitoring and possible reapplication | Long-term restoration |
| Best for | Small to moderate cavities, anxious children | Larger or structurally weakened teeth |
Is Silver Diamine Fluoride Effective?
Yes.
Numerous clinical studies have shown that SDF is highly effective when used appropriately.
Research has found:
- Around 54% of untreated cavities stopped progressing after a single application, compared with approximately 21% in untreated control groups.
- Overall success rates commonly range from 80% to 90% when SDF is applied correctly and monitored regularly.
- Repeat applications every six months improve long-term success.
Pros and Cons of Silver Diamine Fluoride
Advantages
SDF offers several important benefits.
- No drilling.
- No injections.
- Painless treatment.
- Quick application.
- Can treat multiple cavities during one visit.
- Ideal for very young children.
- Helps avoid or delay treatment under general anaesthesia.
- Preserves healthy tooth structure.
Disadvantages
SDF is not the right solution for every cavity.
Its limitations include:
- Permanently turns the decayed area black.
- Does not restore missing tooth structure.
- May require repeat applications every six months.
- Larger cavities may still require fillings, crowns, or pulp therapy later.
Pros and Cons of Traditional Fillings
Advantages
Dental fillings:
- Restore the tooth’s normal shape.
- Allow normal chewing.
- Improve appearance.
- Offer long-term protection when properly maintained.
Disadvantages
Fillings may require:
- Drilling.
- Local anaesthesia.
- Longer appointments.
- Greater cooperation from young children.
Some very young or anxious children may even require sedation or general anaesthesia for extensive treatment.
Who Is a Good Candidate for Silver Diamine Fluoride?
SDF is often recommended for:
Young Children
Children with early childhood cavities who cannot yet tolerate conventional dental treatment.
Children with Dental Anxiety
Because there are no drills or injections, SDF is an excellent option for nervous children.
Children with Special Healthcare Needs
Children with autism, sensory sensitivities, or developmental conditions often benefit from the quick, minimally invasive nature of SDF.
Baby Teeth Near Natural Exfoliation
If a baby tooth will naturally fall out within the next few years, arresting the cavity may avoid unnecessary restorative treatment.
When Is a Filling the Better Choice?
A filling is usually the better option when:
- The cavity is large.
- The tooth has become structurally weak.
- Food is becoming trapped inside the cavity.
- Appearance is important, especially for front teeth.
- Long-term function needs to be restored.
Your pediatric dentist will recommend the treatment that best protects your child’s tooth.
Cost Comparison: SDF vs Filling in Dubai
While fees vary between clinics, SDF is generally the more affordable option because:
- The procedure is very quick.
- Multiple teeth can often be treated during one visit.
- No local anaesthesia is usually needed.
Traditional fillings usually cost more because they require additional clinical time and restorative materials.
Insurance coverage varies depending on your provider and treatment plan.It’s best to confirm exact pricing with your clinic before treatment.
What to Expect During Treatment
Silver Diamine Fluoride
Your dentist will:
- Clean and dry the tooth.
- Apply the SDF with a small brush.
- Allow it to absorb for about one minute.
Your child can usually resume normal activities shortly afterward.
Dental Filling
The dentist will:
- Numb the tooth if needed.
- Remove the decayed tissue.
- Place the filling material.
- Shape and polish the restoration.
The appointment generally takes longer than SDF treatment.
Is Silver Diamine Fluoride Safe?
Yes.
Silver Diamine Fluoride has been used internationally for decades and has an excellent safety record.
The most significant side effect is permanent black staining of the treated cavity.
Healthy tooth structure does not turn black.
Temporary staining on the gums or skin, if it occurs, usually fades within a few days.
Where Can You Get SDF or Fillings in Dubai?
Many pediatric dental clinics in Dubai offer both Silver Diamine Fluoride and traditional fillings.
When choosing a clinic, look for:
- DHA or MOHAP licensed pediatric dentists.
- Experience treating infants and young children.
- Child-friendly treatment approaches.
- A full range of preventive and restorative options.
- Clear discussion of the advantages and limitations of each treatment.
Dr. Enas Alkhadra offers both treatments at her Jumeirah 3 and Jumeirah Park clinics.
Frequently Asked Questions
Is Silver Diamine Fluoride better than a filling?
Neither treatment is universally better. SDF stops cavities without drilling, while fillings restore damaged teeth. The best option depends on the cavity and your child’s needs.
Can SDF completely replace a filling?
Not always. SDF arrests decay but does not rebuild the missing tooth structure. Some teeth will still need a filling or crown later.
Why does SDF turn teeth black?
Only the decayed part of the tooth becomes black. This is a normal sign that the cavity has been successfully arrested.
Does SDF hurt?
No. SDF is painless and does not require injections or drilling.
How often does SDF need to be repeated?
Many pediatric dentists recommend reviewing treated teeth every six months and repeating treatment if necessary.
Is SDF safe for baby teeth?
Yes. SDF is widely used to manage cavities in baby teeth, especially for young children who may not yet tolerate conventional dental treatment.