What is a post, what is it made of, and why do I
need one? These are questions that are very often asked about a procedure
that is required in order to rebuild the proper support for a cap or
crown. Let me take a moment to explain/images/images
First of all, 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 with a sterile plastic material call gutta-percha.
In fabricating your post, we remove some of this
plastic material making sure we 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.
The part of the post that shows is called the core.
It is upon this core that we can anchor a cap or crown. The post is
cemented permanently into your tooth usually separate from the
crown. The crown ( or cap ) is then ready to be placed.
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.
If you have any additional questions regarding this
or any other aspect of your dental treatment, ask your dentist.
