Dental Filling Types: Materials, Benefits & What to Expect

Dental fillings are one of the most common treatments used to repair teeth damaged by cavities, minor fractures, or everyday wear. Modern dentistry offers several different filling types and materials, each with its own advantages when it comes to appearance, durability, cost, and treatment time.

Some fillings are designed to blend naturally with your smile, while others are known for their long-lasting strength. Depending on the size of the cavity and the location of the tooth, your dentist may recommend either a direct filling placed in a single visit or an indirect filling that is custom-made for a more precise restoration.

Understanding the different dental filling types can help you feel more confident about your treatment options and what to expect during the procedure.

What Are Dental Fillings?

Dental fillings are restorations used to repair teeth that have been damaged by decay, small cracks, or minor wear. When a cavity forms, the damaged portion of the tooth is removed and replaced with a filling material to restore the tooth’s shape, strength, and function.

Without treatment, cavities can continue to grow larger and potentially lead to more serious dental problems, including tooth infections, pain, or the need for more extensive procedures such as crowns or root canals.

Today, dentists can choose from several filling materials depending on the location of the tooth, the size of the cavity, and the patient’s cosmetic and durability preferences.

Direct vs. Indirect Dental Fillings

Dental fillings are generally divided into two categories: direct fillings and indirect fillings. The main difference is how the restoration is created and placed on the tooth.

What Are Direct Fillings?

Direct fillings are placed directly into the tooth during a single dental appointment. After removing the decay, the dentist fills the area immediately using a material that hardens inside the mouth.

Common types of direct fillings include:

• Composite fillings
• Amalgam fillings
• Glass ionomer fillings

Pros of Direct Fillings

• Usually completed in one visit
• More affordable than indirect restorations
• Faster treatment process
• Effective for small to medium cavities

Cons of Direct Fillings

• May not be as durable for large areas of damage
• Some materials can wear down more quickly over time

What Are Indirect Fillings?

Indirect fillings are custom-made restorations created outside the mouth before being bonded to the tooth. These are often recommended when a tooth has more extensive damage that cannot be repaired with a standard direct filling.

Common types of indirect fillings include:

• Ceramic fillings
• Gold fillings
• Inlays and onlays

Pros of Indirect Fillings

• Strong and long-lasting
• Excellent fit and appearance
• Better suited for larger restorations

Cons of Indirect Fillings

• Typically more expensive
• May require multiple appointments
• Longer treatment process

Which Option Is Right for You?

The right type of filling depends on several factors, including the size of the cavity, the location of the tooth, cosmetic preferences, and your long-term dental goals. Smaller cavities are often treated with direct fillings, while larger or more complex restorations may benefit from indirect fillings for added durability and support.

Composite Fillings

Composite fillings are one of the most common types of dental fillings used today. Made from a tooth-colored resin material, they are designed to blend naturally with the surrounding teeth, making them a popular choice for patients who want a more cosmetic restoration.

Composite fillings are commonly used for small to medium cavities and are especially popular for visible teeth near the front of the mouth.

Pros of Composite Fillings

• Tooth-colored appearance
• Blends naturally with your smile
• Bonds directly to the tooth structure
• Preserves more natural tooth material

Cons of Composite Fillings

• May not last as long as some other materials in large cavities
• Can become stained over time
• May wear down faster in high-pressure chewing areas

What to Expect With Composite Fillings

Composite fillings are considered direct fillings, meaning they are usually completed in a single appointment. The material is placed in layers, hardened using a special curing light, and then shaped and polished to match the natural tooth.

Amalgam Fillings

Amalgam fillings, often called silver fillings, have been used in dentistry for many years. They are made from a combination of metals and are known for their strength and durability, especially in back teeth that handle heavy chewing pressure.

Although tooth-colored fillings have become more popular, amalgam fillings are still used in certain situations where durability is a priority.

Note: While amalgam fillings are still considered effective in certain situations, San Marin Dental does not place amalgam fillings. Our office prefers newer and more advanced restorative materials, including tooth-colored composite restorations, porcelain restorations, and high-quality metal alternatives (without elemental mercury) such as gold. These materials offer excellent durability, improved aesthetics, and support a more modern, conservative approach to dentistry.

Pros of Amalgam Fillings

• Strong, durable, and long-lasting
• Often more affordable than other filling materials
• Performs well in molars and back teeth

Cons of Amalgam Fillings

• Silver metallic appearance
• Contain elemental mercury
• More noticeable when smiling or laughing
• Less popular for cosmetic reasons

What to Expect With Amalgam Fillings

Amalgam fillings are direct fillings and are typically completed in one dental visit. After the decay is removed, the material is placed into the tooth and shaped to restore normal biting function.

Ceramic Fillings

Ceramic fillings are porcelain-based restorations designed to closely match the appearance of natural teeth. They are commonly used when patients want a durable filling with a highly natural look.

Because ceramic fillings are custom-made, they are typically considered indirect fillings and may require more than one appointment depending on the treatment approach.

Pros of Ceramic Fillings

• Natural-looking appearance
• Resistant to staining
• Durable and long-lasting
• Ideal for visible teeth

Cons of Ceramic Fillings

• Higher cost compared to some filling materials
• May require multiple visits
• Not always necessary for smaller cavities

What to Expect With Ceramic Fillings

For ceramic fillings, the dentist prepares the tooth and takes impressions or digital scans that are used to create the custom restoration. Once ready, the ceramic filling is bonded securely to the tooth to restore its appearance and function.

Gold Fillings

Gold fillings are custom-made restorations created from a durable gold alloy material. While they are less common today, gold fillings are still known for their exceptional strength and long lifespan.

Gold fillings are typically used in back teeth where durability is more important than appearance.

Pros of Gold Fillings

• Extremely durable
• Can last many years with proper care
• Resistant to wear and corrosion
• Strong option for heavy chewing areas

Cons of Gold Fillings

• Higher cost
• Noticeable metallic appearance
• Usually requires multiple appointments

What to Expect With Gold Fillings

Gold fillings are considered indirect fillings because they are custom-made outside the mouth before being placed onto the tooth. After the tooth is prepared, impressions are taken so the restoration can be created and later bonded securely into place.

Glass Ionomer Fillings

Glass ionomer fillings are made from a combination of acrylic and glass materials. Unlike some other filling types, they release fluoride over time, which can help protect the tooth against additional decay.

These fillings are often used for children, small cavities, or areas that are not exposed to heavy chewing pressure.

Pros of Glass Ionomer Fillings

• Releases fluoride to help protect teeth
• Bonds well to the tooth structure
• Commonly used in pediatric dentistry
• Good option for certain root cavities

Cons of Glass Ionomer Fillings

• Less durable than composite or ceramic fillings
• More likely to wear down over time
• Not ideal for high-pressure biting areas

What to Expect With Glass Ionomer Fillings

Glass ionomer fillings are direct fillings and are typically placed during a single appointment. After the tooth is cleaned and prepared, the material is applied directly into the cavity and shaped to restore the tooth.