What Are Fissure Sealants and How Do They Protect Teeth?

Some teeth are more difficult to clean than others.

The back teeth, particularly the molars, often have natural pits and grooves across their chewing surfaces. These grooves are called fissures. Although they help the teeth break down food, they can also trap plaque, bacteria and small food particles.

That is where fissure sealants may help.

Fissure sealants are thin protective coatings placed over the grooves of teeth, usually the back molars. They create a smoother surface that can be easier to clean and help reduce the risk of decay developing within deep fissures.

At Southport Park Family Dental in Southport, QLD, a dentist can examine these grooves during a check-up and explain whether fissure sealants may be suitable for you or your child.

Sealants are commonly used for children and teenagers as their permanent molars emerge. Adults may also benefit in some circumstances. The recommendation depends on the individual tooth, the depth of its grooves, the patient’s oral health and their risk of tooth decay.

What Are Fissure Sealants?

Fissure sealants are protective coatings placed into the pits and grooves on the chewing surfaces of teeth.

The material is usually white or clear and is similar to dental filling material. It flows into the fissures before hardening to create a protective barrier.

The Australian Dental Association’s information about fissure sealants explains that the coating helps prevent food and bacteria from becoming trapped in deep grooves, reducing the risk of decay developing in these areas.

The sealant does not cover the entire tooth. It is placed only over selected pits and grooves on the biting surface.

Other areas still need regular care, including:

• The sides of the tooth
• The areas between neighbouring teeth
• The gumline
• Any surfaces not covered by the sealant

Daily brushing, suitable interdental cleaning, a balanced diet and regular dental examinations remain important after sealants are placed.

Why Can Molars Be Difficult to Clean?

Molars are the broad teeth at the back of the mouth that carry much of the pressure involved in chewing.

Their biting surfaces are not flat. They contain natural grooves and pits that vary in shape and depth from person to person.

Some fissures are shallow and can be cleaned relatively easily. Others are narrow, deep or irregular. Toothbrush bristles may not reach the base of these grooves effectively, even when someone brushes carefully.

When food and bacteria repeatedly collect in a deep fissure, acids produced by plaque bacteria can contribute to the development of tooth decay.

The Healthdirect guide to dental fissure sealants notes that decay commonly begins in tooth fissures because food and bacteria can be difficult to remove from these areas through brushing alone.

How Do Fissure Sealants Protect Teeth?

Fissure sealants work by forming a physical barrier over vulnerable grooves.

Once the material has hardened, it helps prevent food and bacteria from settling deep within the pits and fissures. It also creates a smoother chewing surface that can be easier to brush.

This additional protection may be particularly useful when:

• A tooth has deep or narrow grooves
• Food frequently becomes trapped in a molar
• A newly emerged permanent tooth is difficult to clean
• A child is still developing an effective brushing technique
• The patient has a higher risk of tooth decay

A sealant does not make a tooth decay-proof. It only protects the surface covered by the material.

Decay can still develop between teeth, near the gumline or on other unsealed surfaces. Sealants work best as one part of a broader preventive dental care plan.

You can learn more about fissure sealants in Southport and how they may be used to protect suitable teeth.

Who May Benefit From Fissure Sealants?

Fissure sealants are most often recommended for children and teenagers, particularly on permanent molars with deep grooves.

They may also be considered for adults whose teeth have deep fissures or other factors that increase their risk of decay.

Children and Teenagers

Newly emerged permanent molars can be difficult for children to clean because they sit far back in the mouth. Children may also need time and assistance to develop an effective brushing technique.

Healthdirect advises that fissure sealants are most commonly placed in children from about six years of age and in teenagers, generally soon after suitable teeth emerge. Not every child or tooth requires treatment.

A dentist may assess:

• The depth and shape of the grooves
• Whether plaque or food is becoming trapped
• The child’s brushing ability
• Their previous history of tooth decay
• Their diet and snacking habits
• Fluoride exposure
• Whether the tooth is fully or partly emerged
• Whether early decay is already present

Parents may need to continue helping children brush until they can clean every tooth surface effectively on their own.

Adults

Fissure sealants are not limited to children.

An adult may be considered for sealants if they have:

• Deep, decay-free grooves
• Molars that are difficult to clean
• A history of tooth decay
• A higher assessed risk of future decay
• Teeth without existing fillings across the relevant fissures

Sealants tend to be most useful before a cavity has developed. If decay is already present, another treatment may be required.

People With a Higher Risk of Tooth Decay

A dentist may consider sealants as part of a preventive plan for someone with an increased risk of decay.

Factors that may affect risk include:

• Previous cavities
• Frequent consumption of sugary foods or drinks
• Difficulty brushing effectively
• Reduced saliva flow
• Orthodontic appliances
• Certain medical conditions or medicines
• Limited exposure to fluoride
• Deep pits and grooves in the teeth

The decision should be based on an assessment of the patient and the individual tooth rather than age alone.

Which Teeth Are Usually Sealed?

Fissure sealants are most commonly placed on permanent molars because these teeth often have the deepest chewing grooves.

The first and second permanent molars are frequent candidates, although other teeth may be considered when their anatomy makes them difficult to clean.

These can include:

• Premolars
• Baby molars
• Teeth with additional pits
• Other decay-free teeth with deep grooves

Not every molar needs a sealant. A dentist will inspect each tooth and consider whether the likely preventive benefit justifies treatment.

What Happens During the Fissure Sealant Procedure?

Placing a fissure sealant is generally a straightforward procedure.

In many cases, no injection or drilling is required. The tooth needs to be cleaned, prepared and kept dry so the material can bond to the surface.

Healthdirect describes fissure sealing as a simple procedure that generally involves cleaning and drying the tooth, preparing its surface, applying the liquid sealant, hardening it and checking the bite.

Step 1: Examining the Tooth

The dentist or oral health professional examines the tooth to check whether a sealant is appropriate.

They may assess:

• The depth of the grooves
• Whether the surface is healthy
• Whether early decay may be present
• Whether an existing filling affects the area
• Whether the tooth can be kept dry during treatment

Further investigation may be recommended if there are concerns about decay beneath the surface.

Step 2: Cleaning the Tooth

The chewing surface is cleaned to remove plaque, food particles and other debris from the fissures.

A clean surface helps the sealant bond properly.

Step 3: Isolating and Drying the Area

The tooth needs to remain dry while the material is being placed.

Cotton rolls, suction or another isolation method may be used to keep saliva away from the surface.

Step 4: Preparing the Tooth Surface

A conditioning material is usually applied briefly to prepare the enamel.

The tooth is then rinsed and dried. This step creates a surface to which the sealant can bond more securely.

Step 5: Applying the Sealant

The liquid sealant material is carefully placed into the pits and grooves.

The clinician checks that the material has flowed into the areas that need protection without covering unnecessary parts of the tooth.

Step 6: Hardening the Material

Many sealants are hardened using a special dental light.

Some materials set through a different chemical process and may not require a light.

Step 7: Checking the Bite

After the sealant has hardened, the dentist checks how the upper and lower teeth meet.

Any excess material may be adjusted or polished so the tooth feels comfortable when biting.

The dental team at Southport Park Family Dental can explain each stage before treatment and answer questions about the material being used.

Does Getting Fissure Sealants Hurt?

Fissure sealing is generally not painful because the treatment is applied to the outer enamel surface.

In many cases, the procedure does not require drilling or local anaesthetic. The patient may notice the taste of the preparation materials or feel pressure while the tooth is being cleaned and kept dry.

Healthdirect states that placing fissure sealants does not usually hurt and that anaesthetic is not generally required.

Some children may find it challenging to keep their mouth open or keep the tooth dry. The dental team can explain what is happening and work at a pace that suits the child where possible.

The experience can vary if the tooth requires additional treatment before it can be sealed.

Are Fissure Sealants Only for Children?

No. Although sealants are commonly used for children and teenagers, adults may also be suitable candidates.

For an adult, the dentist will consider:

• Whether the groove is deep
• Whether the surface is free from decay
• Whether there is an existing filling
• The patient’s previous history of cavities
• Whether food regularly becomes trapped
• The expected benefit of sealing the tooth

An adult tooth that has remained healthy for many years may not necessarily require a sealant. Recommendations depend on the findings from an individual assessment.

How Long Do Fissure Sealants Last?

Fissure sealants can remain in place for years, but they are not permanent.

Normal biting and chewing forces can gradually wear down the material. A sealant may also chip, partially detach or become thinner over time.

The Australian Dental Association notes that sealants can wear away through normal use of the teeth. Healthdirect advises that they should be checked during regular dental visits and replaced when necessary.

The lifespan of a sealant may depend on:

• The tooth and its position
• Bite pressure
• Teeth grinding or clenching
• The depth of the original fissure
• How well the tooth remained dry during placement
• The material used
• Oral hygiene
• Regular dental monitoring

If part of a sealant wears away, the dentist may repair or replace it where appropriate.

What Happens If a Sealant Comes Off?

A partly or completely lost sealant does not always cause pain or noticeable symptoms.

You may notice:

• A rough edge
• A change in how the tooth feels
• A small piece of material in the mouth
• Food becoming trapped in the groove again
• No obvious change at all

A dentist can examine the tooth to determine whether the sealant needs repair or replacement.

Do not assume that a sealant remains intact simply because the tooth feels normal. Regular dental examinations allow the material and the tooth underneath it to be reviewed.

Do Fissure Sealants Replace Brushing?

No. Fissure sealants are an additional preventive measure, not a replacement for daily oral hygiene.

The sealed tooth still needs to be brushed twice a day. Areas between the teeth should also be cleaned using a method recommended by a dental professional.

A complete preventive routine may include:

• Brushing twice daily
• Using age-appropriate fluoride toothpaste
• Cleaning between teeth where appropriate
• Limiting frequent sugary foods and drinks
• Drinking water
• Attending regular dental examinations
• Having professional cleaning when recommended
• Using fissure sealants where clinically appropriate

The Better Health Channel’s dental sealant advice recommends brushing all tooth surfaces twice daily, using age-appropriate fluoride toothpaste, limiting sugary foods and drinks and attending regular dental check-ups.

Sealants only protect the grooves they cover. Tooth decay can still develop elsewhere if plaque is not removed regularly.

Can Children Brush Normally After Getting Sealants?

Yes. Children can generally brush their teeth as usual after fissure sealants have been placed.

The sealed surface may feel slightly different at first, but it should not prevent normal brushing or eating. If the bite feels uncomfortable or unusually high after the appointment, contact the dental practice for advice.

Parents should continue helping younger children brush, particularly the molars at the back of the mouth.

Use toothpaste suitable for the child’s age and follow individual advice from their dentist or oral health professional.

Are Fissure Sealants Safe?

Fissure sealants have been used for many years as part of preventive dental care.

Healthdirect reports no common risks associated with their placement, although the material can wear down and may need replacement.

As with any dental procedure, parents and patients can ask about:

• The material being used
• Why the particular tooth is being sealed
• Possible alternatives
• How the sealant will be monitored
• What happens if the material wears away
• Any individual concerns or allergies

Treatment should only proceed after the tooth has been assessed and the dentist has explained why a sealant may be appropriate.

Can Sealants Be Placed Over Early Decay?

The answer depends on what is happening within the tooth.

A sealant is usually used to protect a groove before a cavity develops. If decay is already present, the dentist may need to investigate and treat the area differently.

In some situations, very early changes may be managed as part of a preventive care plan, but this requires professional diagnosis and ongoing monitoring.

Do not rely on a sealant to cover a tooth that is painful, sensitive or visibly damaged. Arrange a dental assessment so the cause can be identified.

Are There Alternatives to Fissure Sealants?

The appropriate preventive approach depends on the tooth and the patient’s decay risk.

Other measures may include:

• Fluoride toothpaste
• Professional fluoride treatments
• Improved brushing technique
• Interdental cleaning
• Dietary changes
• More frequent dental monitoring
• Treatment of established decay where necessary

Healthdirect identifies fluoride varnish as another preventive option that may be considered for some patients.

These measures are not always direct substitutes for one another. A dentist may recommend a combination based on the patient’s needs.

Questions to Ask Your Dentist

When fissure sealants are recommended, you may wish to ask:

• Which teeth would be sealed?
• Why are these teeth considered at risk?
• Is there any sign of existing decay?
• What material will be used?
• Will drilling or anaesthetic be needed?
• How long might the sealants last?
• How will they be checked?
• What happens if a sealant wears down?
• Are there other suitable preventive options?
• What will the treatment cost?

Clear answers can help you understand how sealants fit into your or your child’s broader preventive care plan.

When Should You Speak With a Dentist?

Consider asking about fissure sealants if you or your child has:

• Deep grooves in the back teeth
• Food frequently becoming trapped in molars
• Difficulty cleaning newly emerged permanent teeth
• A previous history of tooth decay
• A higher assessed risk of cavities
• A sealant that feels rough or appears damaged

A dentist can examine the tooth and determine whether sealing it may be helpful.

If a tooth is painful, sensitive, broken or already affected by decay, another treatment may be required. Fissure sealants are not intended to replace the diagnosis and treatment of an existing dental problem.

Book a Fissure Sealant Assessment in Southport

Fissure sealants are not necessary for every person or every tooth. For a suitable tooth, however, they may provide an additional layer of protection over grooves that are difficult to clean.

A dentist can examine the molars, assess the risk of decay and explain whether sealants or another preventive option may be appropriate. Treatment recommendations and results depend on individual clinical findings.

To arrange an assessment, contact Southport Park Family Dental or book a dental appointment online.

Frequently Asked Questions

What are fissure sealants?

Fissure sealants are thin protective coatings placed over the pits and grooves of teeth, usually the back molars.

They help prevent food and bacteria from settling deep within the grooves and may reduce the risk of decay developing on the sealed surface.

Are dental sealants the same as fissure sealants?

The terms are often used interchangeably.

“Fissure sealant” describes a dental sealant placed over the natural pits and fissures on a tooth’s chewing surface.

Which teeth usually need fissure sealants?

Sealants are most commonly placed on permanent molars in children and teenagers.

Other teeth may be considered if they have deep grooves, are difficult to clean and have not already developed decay or extensive fillings.

A dentist must assess each tooth individually.

At what age should children get fissure sealants?

Sealants are commonly considered after suitable permanent molars emerge, often from around six years of age.

Age alone does not determine whether treatment is needed. The dentist will assess the shape of the tooth, brushing ability and the child’s overall risk of decay.

Does sealing molars hurt?

In most cases, fissure sealing does not require drilling, injections or local anaesthetic.

The tooth is cleaned, kept dry and coated with the sealant material. Some children may find keeping their mouth open or the tooth dry uncomfortable, but the procedure itself is generally not painful.

How long do fissure sealants last?

Sealants can last for years, but their lifespan varies.

They may wear down, chip or partly detach through normal chewing. Your dentist can check them at regular appointments and repair or replace them when appropriate.

Can adults get fissure sealants?

Yes. Adults may be suitable for sealants if they have decay-free teeth with deep grooves or other factors that increase their risk of decay.

An individual examination is needed to determine whether treatment would be useful.

Do fissure sealants stop all tooth decay?

No. Sealants only protect the grooves they cover.

Decay can still develop between teeth, near the gumline and on other unsealed surfaces. Brushing, fluoride toothpaste, a balanced diet and regular dental care remain important.

Can you eat normally after fissure sealants?

Most patients can generally eat normally after the material has set.

The tooth may feel slightly different at first. Contact your dentist if the bite feels uncomfortable or the sealant seems unusually high.

Do fissure sealants contain fluoride?

Some fissure sealant materials contain fluoride, while others do not.

Your dentist can explain which product is being used and why it has been selected.

What happens if a fissure sealant falls out?

Arrange a dental examination if a sealant appears to have come off or feels damaged.

The dentist can check the tooth for decay and determine whether the material should be repaired or replaced.

Are fissure sealants better than fluoride treatments?

They serve different purposes.

A fissure sealant forms a physical barrier over deep grooves, while fluoride treatments help strengthen tooth surfaces and support resistance to decay. A dentist may recommend one or both depending on the patient’s needs.