Fissure Sealants in Townsville

What Are Fissure Sealants?

Fissure sealants are thin, protective coatings applied to the chewing surfaces of back teeth (premolars and molars) to seal the deep grooves and pits where food particles and bacteria accumulate. These fissures are often too narrow for toothbrush bristles to clean effectively, making them highly susceptible to decay. According to the Australian Institute of Health and Welfare, dental caries remains the most common chronic disease in Australian children, affecting approximately 42 per cent of children aged 5 to 10 in their primary teeth (AIHW, Child Oral Health, 2023). A Cochrane systematic review (Ahovuo-Saloranta et al., 2017) found that sealants reduce decay risk in permanent molars by up to 80 per cent compared to unsealed teeth. At Townsville Dental Clinic, we recommend fissure sealants as a first line of defence for children across Townsville and North Queensland, applied as soon as permanent molars erupt for protection during the most cavity-prone years.

Who Needs Fissure Sealants?

Fissure sealants are recommended for:

• Children aged 6 to 7 — when first permanent molars erupt
• Children aged 11 to 13 — when second permanent molars erupt
• Teenagers — premolars with deep fissures that are difficult to clean
• Adults — patients with deep, unfilled fissures at high risk of decay
• Children with developmental enamel defects — teeth with weakened enamel benefit from additional protection

The Australian Dental Association recommends that all children be assessed for sealant suitability when their permanent molars come through. Children with a history of decay in their baby teeth are at higher risk and should be prioritised for sealant application.

How Are Fissure Sealants Applied?

The application process is quick, painless, and requires no drilling or anaesthesia:

1. Cleaning — the tooth surface is thoroughly cleaned to remove plaque and debris from the fissures
2. Isolation — the tooth is kept dry using cotton rolls or a dry shield, as moisture can prevent the sealant from bonding properly
3. Etching — a mild acid solution is applied to the chewing surface for 15 to 30 seconds to create a microscopically rough surface for bonding
4. Rinsing and drying — the etching solution is rinsed off and the tooth is dried again
5. Sealant application — the liquid sealant material is carefully painted into the fissures and pits of the tooth
6. Curing — a blue LED light is used to harden the sealant in approximately 20 seconds
7. Bite check — the dentist checks that the sealant does not interfere with your bite and adjusts if necessary

Total time: approximately 2 to 5 minutes per tooth.

Fissure Sealants vs Dental Fillings

Sealants are a preventive measure — they are far simpler, faster, and more affordable than treating decay after it develops. Source: Australian Dental Association preventive care guidelines.

How Effective Are Fissure Sealants?

The evidence for fissure sealants is strong:

• Up to 80 per cent reduction in decay on sealed surfaces compared to unsealed teeth (Cochrane Review, Ahovuo-Saloranta et al., 2017)
• Cost-effective prevention — the cost of sealing a tooth is typically one-fifth to one-quarter of the cost of filling a cavity
• Long-lasting protection — sealants that remain intact continue to protect for 5 to 10 years or longer
• Safe and well-established — fissure sealants have been used in dentistry for over 50 years with an excellent safety record

A study published in the Journal of Dental Research (2016) found that for every dollar invested in preventive sealant programmes, approximately four dollars in restorative treatment costs were avoided over a 10-year period.

How Long Do Fissure Sealants Last?

Fissure sealants typically last 5 to 10 years, though some sealants remain intact for even longer. Their longevity depends on:

• Chewing forces — heavier biting patterns may cause sealants to wear more quickly
• Oral habits — grinding or clenching (bruxism) can reduce sealant lifespan
• Quality of application — proper isolation and moisture control during placement are critical for long-term retention
• Regular monitoring — your dentist checks sealant condition at each checkup and can reapply if any portion has chipped or worn away

Even partially retained sealants continue to offer some protection, as the remaining material still blocks bacteria from the deepest parts of the fissure.

Why Choose Townsville Dental Clinic for Fissure Sealants?

Townsville Dental Clinic provides preventive fissure sealant treatment to children and adults across Townsville, Aitkenvale, Kirwan, and the wider North Queensland region. Our team is experienced in working with young children and makes the application process comfortable and stress-free. We bulk-bill eligible patients under the Child Dental Benefits Schedule (CDBS) at no out-of-pocket cost, because we believe every child deserves access to effective preventive dental care.

Related Services

• Preventive Dentistry
• Children’s Dentistry
• Fluoride Treatment

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