Post and Core Restorations
A post and core restoration is a specialized procedure used to rebuild and reinforce a tooth that has undergone root canal treatment and has lost most of its natural structure above the gumline. After a root canal, the tooth is often hollow and weakened, leaving insufficient support for a dental crown. A post is placed into the root canal space to anchor the restoration, and a core is built up around it to recreate the tooth's shape, providing a stable platform for the final crown.
At Bensonhurst Dental Care, post and core restorations are provided by Dr. Marina Rubinshtein. The procedure begins with the careful placement of a prefabricated or custom post into the treated root canal. The post extends into the root for retention and stability. Once the post is secured, a core buildup is constructed around it using high-strength restorative material, rebuilding the tooth to a form that can properly support a crown. The tooth is then prepared and impressed for the final restoration.
The decision to use a post and core versus a core buildup alone depends on how much natural tooth structure remains. When the walls of the tooth are largely intact, a core buildup without a post may be sufficient. When the tooth is severely compromised, the post provides the additional internal anchorage needed to keep the entire restoration secure under the forces of chewing. Dr. Marina evaluates each tooth individually to determine the approach that will provide the most reliable long-term result.
Frequently Asked Questions
When is a post and core needed?
A post and core is typically needed after root canal treatment when the remaining tooth structure is too minimal to support a crown on its own. If the tooth has lost most of its natural walls or has been significantly weakened, the post provides the internal reinforcement necessary for a stable restoration.
What types of posts are used?
Posts can be prefabricated (made from fiber or metal and placed directly) or custom cast (fabricated in a lab from a mold of the canal). Fiber posts are the most commonly used in modern dentistry because they are strong, flexible, and bond well to the tooth. Dr. Marina selects the type of post best suited to each case.
Can any root-canaled tooth receive a post?
Not all root-canaled teeth require a post, and not all are candidates. The root must be long enough, wide enough, and structurally sound enough to accept a post safely. Dr. Marina evaluates the root anatomy and remaining tooth structure to determine candidacy.
How long does a post and core restoration last?
When properly placed and protected by a well-fitting crown, a post and core restoration can last many years. Success depends on the quality of the root canal, the fit of the post, the patient's oral hygiene, and whether the tooth is protected from excessive force with a nightguard if grinding is a factor.
