Composite and glass ionomer fillings

Tooth isolated with rubber dam prepared for dental treatment

MDDr. Natálie Kupcová

19. 10. 2025

Composite and glass ionomer fillings are modern materials used to repair teeth damaged by decay or minor trauma. In particular, they are both safe and effective, and therefore widely recommended in dentistry. Composite fillings are often called “white fillings”; moreover, they closely match natural tooth color. As a result, they blend naturally, and at the same time, remain nearly invisible.

Glass ionomer fillings, however, offer a different advantage. Unlike composite, they gradually release fluoride into the surrounding tooth. Because of this, they help protect the tooth from further decay, and therefore are often used in preventive treatments. At the same time, they are suitable for adult patients in specific cases, especially when shorter procedures are required.

Selection of material as needed

The choice between composite and glass ionomer fillings depends on several factors. First, the dentist considers the size of the cavity. In addition, the location of the tooth is important, and moreover, the patient’s age and cooperation influence the decision.

Composite fillings are typically recommended for teeth exposed to higher chewing pressure. Moreover, they are ideal where aesthetics are especially important. Because they bond strongly, they provide stability, and therefore are often used for long-term restorations.

Glass ionomer fillings, on the other hand, are frequently chosen for smaller cavities. In addition, they are suitable for children who cannot tolerate long procedures. Since they are quicker to apply, treatment is shorter, and consequently, more comfortable. Therefore, dentists often select them for pediatric patients, while at the same time ensuring quality.

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Advantages of modern fillings

Modern fillings offer several benefits compared with old amalgam fillings. First, they do not contain metal. In addition, they blend naturally with teeth, and thus are suitable even for visible areas.

Another important advantage is their gentle effect on dental tissues. For example, glass ionomer gradually releases fluoride. As a result, enamel is strengthened, and therefore the risk of new cavities is reduced.

Composite fillings, in contrast, are strong and durable. Furthermore, dentists can shape them precisely, and consequently, the tooth regains its natural form and function. At the same time, the restoration supports long-term dental health, and moreover, it maintains comfort during chewing.

Long-term solution with proper care

A properly placed filling can last many years. However, its durability depends on regular dental check-ups, and moreover, daily oral hygiene is essential. Therefore, proper brushing and preventive visits are crucial, while at the same time providing protection against further decay.

In children, fillings often serve as a temporary solution. Usually, they remain until the primary tooth is naturally replaced. Meanwhile, they help maintain chewing and protect teeth, and additionally, they support overall dental development.

Overall, early and high-quality treatment of tooth decay is extremely important. By using composite or glass ionomer fillings, dentists restore teeth effectively, and at the same time, support healthy development. Consequently, children can grow up with strong, healthy, and aesthetic smiles, while also avoiding future dental problems.

PreventionTreatment of a baby tooth
We perform treatments on primary teeth using magnification and a rubber dam to ensure maximum precision and a dry working field. The result is natural-looking, durable, and long-lasting, suitable for both visible and less visible areas of the dentition.

                from 2 500 CZK / from 102 €
              
Silver application (SDF)
Silver application (SDF) is a quick and non-invasive method that stops both early and advanced tooth decay. The solution is applied directly to the affected area, significantly slowing down or completely stopping the decay. It is painless and particularly suitable for children or in cases where a traditional filling cannot be done immediately. The only disadvantage is that the treated area darkens, but this does not affect its function.

                from 1,000 CZK / from 41 €
              
Sealing fissures
Sealing fissures is a preventive procedure in which deep grooves on molars are sealed with a thin layer of protective resin. This prevents plaque from accumulating in areas that are difficult to clean. This significantly reduces the risk of tooth decay. The procedure is quick, gentle, and painless.

                from 1,500 CZK / from 62 €
              
Extended fissure sealing
Preventive fillings/extended sealing are used on teeth where the enamel in the fissure is already slightly damaged, but it is not yet a classic cavity. The groove is gently micro-invasively adjusted and filled with a small amount of filling material. This stabilizes the tooth and prevents further decay. It is a quick and gentle way to catch the problem at its very beginning.

                from 2,500 CZK / from 102 €
              
Halls crown
The Hall crown is a stainless steel crown for children that can be placed on a decay-weakened temporary tooth without drilling or injections. The crown seals the tooth and stops further decay, as bacteria lose access to their food source. It is a quick, gentle, and well-tolerated treatment. It helps preserve the milk tooth until it is naturally replaced.

                from 3,000 CZK / from 123 €
              

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