What is the difference between fluoride application and fissure sealing?

Aug 22, 2025 Source: Cainiu Health

Dr. Liu Chao

Introduction

Generally speaking, fluoride application and fissure sealants differ in terms of application sites, protective mechanisms, indicated teeth, duration, and procedures. A detailed analysis is as follows: Additionally, both fluoride application and fissure sealants are effective methods for preventing dental caries and can be used together depending on the condition of the teeth. It is recommended to choose a reputable dental facility and have these procedures performed by qualified professionals.

Generally, fluoride application and pit and fissure sealants differ in their application sites, protective mechanisms, applicable teeth, duration of effect, and procedures. A detailed analysis is as follows:

1. Application Sites

Fluoride application is suitable for all tooth surfaces, including the crown, sides, and neck of the tooth, providing overall surface protection. In contrast, pit and fissure sealants target only the grooves on the occlusal surfaces of teeth, focusing specifically on the indented grooves on the tooth surface.

2. Protective Mechanism

Fluoride works by combining with the minerals on the tooth surface to enhance resistance to acid attack, inhibit bacterial acid production, and reduce demineralization. Pit and fissure sealants function by filling the grooves with a sealing material to create a physical barrier that prevents food debris and bacteria from entering the grooves.

3. Applicable Teeth

Fluoride application is suitable for both primary and permanent teeth in children as well as adults' teeth. Pit and fissure sealants are primarily used for newly erupted permanent teeth in children and adolescents, especially molars.

4. Duration of Effect

The protective effect of fluoride typically lasts for 3-6 months and requires periodic reapplication. If the sealant material remains intact, pit and fissure sealants can last for several years or even longer without the need for frequent reapplication.

5. Procedure

Fluoride application is simple: after cleaning the tooth surface, fluoride is directly applied without the need for grinding. Pit and fissure sealants require cleaning of the grooves first, followed by slight grinding if necessary, then applying the sealing material and curing it.

In addition, both fluoride application and pit and fissure sealants are effective methods for preventing dental caries and can be used in combination depending on the condition of the teeth. It is recommended to choose a reputable dental facility and have the procedures performed by professional personnel.

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When should pit and fissure sealing be done?

In general, pit and fissure sealing is performed within one year after the tooth erupts. After undergoing pit and fissure sealing, certain precautions should still be observed. For several days following the procedure, avoid chewing excessively hard or sticky foods with the sealed teeth to prevent dislodgement of the sealant material. It is important to maintain good oral hygiene by thoroughly brushing teeth twice daily and using dental floss or other tools to clean the interproximal surfaces of the teeth.

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When should children receive pit and fissure sealants?

Under normal circumstances, children can receive pit and fissure sealing at the age of 6 to 7 years. After the procedure, it is important to avoid letting the child chew excessively hard foods, such as nuts or bones, with the sealed teeth for 24 hours post-treatment, to prevent dislodgement of the sealing material. Additionally, it is important to supervise the child's daily oral hygiene, ensuring they brush their teeth at least twice daily for no less than three minutes each time.

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What are the indications for pit and fissure sealants?

Under normal circumstances, pit and fissure sealants have clearly defined target populations and dental conditions. The main indications include: eruption of permanent teeth, deep pits and fissures on tooth surfaces, individuals with poor oral hygiene maintenance, those with a family history of dental caries, and teeth without caries on adjacent surfaces. In addition, if deciduous teeth have deep pits and fissures and are prone to caries, pit and fissure sealants may also be considered upon a doctor's recommendation.

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What is the price for children's dental fissure sealing?

Under normal circumstances, the general reference price for children's dental fissure sealants is 80-300 yuan per tooth. However, the specific price may be affected by factors such as the number of teeth, the condition of the teeth, the selected materials, local living costs, and follow-up services. This procedure should be performed at a qualified medical institution. A detailed explanation is as follows: in daily life, parents should supervise children to maintain good oral hygiene.