Post and core is a procedure to rebuild a tooth in order to provide proper support for a crown. The post will act like an anchor for the placement of crown. Posts are usually recommended in case of inadequate support for a crown. A post is placed within the body of the root of a tooth that has already treated with root canal treatment.
A post is a metallic structure that is placed within the body of the root of a tooth that has had previous root canal therapy. It can only be placed in a tooth that has had endodontic therapy ( root canal ) since once the dentist enters the nerve, the nerve dies. Root canal therapy prevents further infection and discomfort. During root canal therapy, the space previously occupied by the nerve is filled. The part of the post that shows is called the core. It is upon this core that can anchor a cap or crown. The post is cemented into your tooth usually separate from the crown. The crown ( or cap ) is then ready to be placed.
In fabricating your post,the dentist removes some of this plastic material making sureto leave the last two to three millimeters to seal the end of the root. This space that is fabricated is necessary in order to anchor the post within the root of the tooth. There are different types of posts. The type that is chosen for you will depend upon a number of factors. The post can either be 1) prefabricated or 2) it can be cast at the dental laboratory. In either case, the result of anchorage for a crown is the same. Although posts are usually recommended when there is minimal support for a crown, they are not always necessary. The use of a post will be determined on an individual basis based upon support and structural requirements.