Dental compomer

Dental compomers are a type of dental material that combine aspects of both composite resins and glass ionomer cements. These materials are primarily used in the field of dentistry for the restoration of teeth, particularly in areas not subjected to high biting pressure. Dental compomers were developed to take advantage of the beneficial properties of both composite resins and glass ionomer cements, aiming to provide an optimal material for dental restorations.

Composition and Properties

Dental compomers consist of a resin matrix, similar to that found in composite resins, and a glass filler that is pre-reacted with polyacid, akin to glass ionomer cements. This unique composition allows dental compomers to exhibit properties from both parent materials. They possess the aesthetic appeal and durability of composite resins, while also benefiting from the fluoride release and adhesion to tooth structure characteristic of glass ionomer cements.

Indications

Dental compomers are primarily indicated for use in:

• Restorations in primary teeth
• Class III and Class V restorations in permanent teeth
• Repair of minor defects in enamel
• Fissure sealing
• As a liner or base under composite restorations

Due to their moderate strength compared to composite resins, compomers are not recommended for use in areas of high biting pressure, such as the occlusal surfaces of molars.

Advantages

The main advantages of dental compomers include:

• Aesthetic appearance, with the ability to closely match the color of natural teeth
• Release of fluoride, which can help in preventing secondary caries
• Good bond strength to tooth structure without the need for a separate bonding agent
• Ease of handling and application

Disadvantages

Despite their benefits, dental compomers also have some limitations:

• Lower wear resistance compared to composite resins, making them less suitable for high-stress areas
• Potential for water absorption, which can affect the longevity of the restoration
• Limited evidence on long-term durability compared to more traditional dental materials

Clinical Application

The clinical application of dental compomers involves the following steps:

1. Tooth preparation, including caries removal and shaping of the cavity
2. Application of a bonding agent, if required, depending on the product
3. Placement of the compomer material into the cavity
4. Light-curing of the material to achieve hardening
5. Finishing and polishing to achieve the desired aesthetic result

Conclusion

Dental compomers represent a versatile option in the arsenal of materials available for dental restorations. Their unique combination of properties from both composite resins and glass ionomer cements makes them a suitable choice for certain clinical situations, particularly in pediatric dentistry and for low-stress restorations in permanent teeth. However, their limitations in terms of wear resistance and long-term durability necessitate careful consideration of their indications and contraindications.