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What Is Tooth Filling Material? Current Tooth Filling Materials

Hoang Gia Hung
Hoang Gia Hung
Asked: 25/08/2026

Dear Doctor, I have seen the term “tooth filling material” mentioned online along with various types of materials. What exactly is tooth filling material, and which materials are currently considered ? Does the choice of material significantly affect durability and aesthetics?

Hello, regarding your questions about tooth filling material, as well as which tooth filling material or tooth filling substance is appropriate, the doctor will explain in detail so that you can clearly understand the nature of each material and make the right choice for each case.

What Is Tooth Filling Material? What Role Does It Play in Dentistry?

The doctor explains as follows: tooth filling material is actually a common term for tooth filling materials used to restore tooth structure damaged by tooth decay, chipping, fractures, or gaps between teeth. In professional terminology, they are more precisely referred to as “tooth filling materials.”

The role of tooth filling materials in dentistry is not simply to “fill a gap,” but also to treat and preserve natural teeth. When a tooth develops decay, bacteria will continue to grow if the condition is not treated. The use of filling materials helps remove decayed tissue and seal the cavity, thereby preventing bacterial reinfiltration and protecting the dental pulp.

In addition, tooth filling materials also help restore chewing function, particularly for molars that have lost tooth structure. For the front teeth, aesthetic filling materials can also improve the shape and color of the teeth, providing aesthetics that are nearly identical to natural teeth. This is why tooth filling today is not only a treatment but also a popular cosmetic dentistry service.

What Materials Are Currently Used for Tooth Fillings?

There is no single material that is “ suitable for everyone”; the choice should be based on the condition of the teeth, tooth location, and aesthetic needs. Below are the most common tooth filling materials currently used:

Cosmetic Composite

Composite is a tooth filling material that is widely used today because its color resembles natural teeth. This material has good bonding ability and can restore small to moderate defects in both front teeth and molars.

Its outstanding advantage is its high aesthetic quality, with the filling being almost imperceptible, making it suitable for front tooth fillings or minor restorations. However, its durability depends on the technique used and the patient’s diet.

Amalgam (Metal)

Amalgam is a traditional silver-colored filling material made from a metal alloy. Its major advantages are high durability and good resistance to chewing forces, making it suitable for molars.

However, because of its unaesthetic color and metallic composition, it is currently used less frequently, particularly in cosmetic dentistry.

GIC (Glass Ionomer Cement)

GIC is a filling material capable of releasing fluoride, helping to prevent recurrent tooth decay. This material is commonly used for mild tooth decay or temporary fillings.

Its disadvantages are relatively low durability and moderate aesthetics, so it is less commonly used in areas exposed to strong chewing forces.

Porcelain Inlay/Onlay

This is an indirect porcelain restoration method designed specifically according to the shape of the tooth. In essence, it is a form of “advanced tooth filling” offering superior precision and durability.

Porcelain Inlays/Onlays provide very high aesthetic quality, long-term durability, minimal shrinkage, and are suitable for teeth with extensive damage that do not yet require full-coverage crowns.

Criteria for Choosing the Appropriate Tooth Filling Material

The choice of tooth filling material should not be based solely on cost but should be comprehensively assessed from a professional perspective. First is the tooth’s location: front teeth prioritize aesthetics, so composite or porcelain is usually selected, whereas molars need to withstand strong chewing forces, so more durable materials may be considered.

Next is the extent of tooth damage. If the cavity is small, composite is an appropriate choice. However, if a large amount of tooth structure has been lost, the doctor may recommend an Inlay/Onlay or even a porcelain crown to ensure long-term durability.

In addition, individual oral characteristics, eating habits, and chewing forces also affect the choice of tooth filling material. Therefore, the doctor always needs to conduct a direct examination to provide an accurate indication rather than applying the same material to every case.

Are Tooth Filling Materials Safe?

In principle, the tooth filling materials used in modern dentistry have all undergone assessments for biological safety. This means that they are non-toxic and do not affect health when used according to appropriate indications.

However, safety also depends on many factors, such as the source of the material, the technique used, and the dentist’s expertise. If low-quality materials are used or sterilization procedures are inadequate, there may still be a risk of inflammation or irritation.

For materials such as composite or GIC, their high biocompatibility makes them very safe for tooth and gum tissues. As for Amalgam, although it is still used in some cases, many people currently prefer non-metal materials to ensure better aesthetics and greater peace of mind.

If you are wondering which tooth filling material is appropriate for your condition, the doctor recommends having a direct examination for an accurate assessment. At Gangwhoo Cosmetic Hospital, tooth filling procedures are performed using genuine materials and modern technology, ensuring both aesthetic results and long-term durability. In addition, services such as tooth whitening here are also commonly combined after fillings to provide a more evenly colored, natural, and healthy-looking smile.


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