Post and Core

What is a post-and-core?

A post-and-core is a metal component of an extensive tooth repair: 

• oIt is a thin metal rod that is cemented into the root of a tooth. 

• oIt consists of a post that fits into the root canal, and a core portion that projects above the gum.

• A new replacement crown will be cemented into position over the core.

Why is a post-and-core necessary after root canal treatment?

• Teeth that are treated for root canal problems are often badly broken down. 

• They need to be built up before they can have a replacement crown fitted over them. 

• Post-and-core fabrication is the method of choice for the build-up process.

Procedure of Post and Core Placement After the RCT is complete, in the subsequent appointment some of the gutta-percha from the root canal is removed leaving at least 5mm of gutta-percha inside the root canal. Then using a series of graduated instrument called reamer, root canal is enlarged sufficiently to receive a post.  

Posts are usually pre-fabricated and available in many shapes. Post most suitable for the prepared root is chosen and cemented in the root canal such that it gets firmly embedded inside the root canal.

Placement of post in the root canal

The tooth structure is then built up using a suitable core material such as amalgam or composite. When core material gets hardened it is shaped properly and prepared to receive a crown.