Post and core

A post and core crown is a specialized type of dental restoration used in situations where there is insufficient tooth structure remaining to support a conventional crown. This condition often arises in teeth that have undergone significant decay or damage.

Overview

The post and core crown consists of two primary components: a post and a core. The post is a slender, rod-like structure that is cemented into a root canal that has been specially prepared. This post provides stability and retention for the core material, which is built up around it. The core serves as a foundation for the final crown, effectively replacing the missing tooth structure and allowing for the successful attachment of the crown.

Function

The primary purpose of the post is to retain the core restoration and, subsequently, the final crown. The post also plays a crucial role in redistributing the stresses exerted on the tooth. By transmitting these forces down onto the root of the tooth, the post helps in reducing the likelihood of coronal fractures.

Considerations

It is important to note that the post does not reinforce or strengthen the tooth itself. In some cases, the presence of a post can increase the risk of root fractures. This risk underscores the importance of careful planning and execution in the placement of a post and core crown. The procedure typically follows endodontic therapy (root canal treatment), as it involves working within the root canal of the tooth.

Materials

Various materials can be used for both the post and the core. Posts may be made from metal, fiberglass, or other reinforced resins, while the core is often composed of dental composite or amalgam. The choice of materials depends on several factors, including the tooth's location, the amount of remaining tooth structure, and aesthetic considerations.

Aesthetic and Functional Outcomes

The final crown, placed over the post and core, is designed to match the color and shape of the natural teeth, thus restoring both function and aesthetics. With proper care and maintenance, a post and core crown can have a long lifespan, contributing significantly to the overall oral health of the patient.

See Also

• Crown (dentistry)
• Root canal
• Dental composite
• Dental fractures