Post and Core Build-Up

A post and core build-up is a restorative procedure used for selected root-treated teeth that have lost substantial visible tooth structure. The core rebuilds the missing crown portion of the tooth, while a post may be placed inside part of a prepared root canal when additional retention is needed. At Bourgeois Dental Clinic in Dubai, a post is recommended only after assessing the remaining tooth structure, root condition, canal filling, bite, fracture risk, and planned final restoration.

What Is a Post and Core Build-Up?

The procedure has two possible components:

• Core build-up: Restorative material used to rebuild the missing visible portion of the tooth.
• Post: A component placed within a prepared part of the root canal to help retain the core when insufficient tooth structure remains above the gumline.

Not every root-treated tooth requires a post. Many teeth can receive a core build-up without placing anything inside the root.

Does a Dental Post Strengthen the Tooth?

No. A dental post does not strengthen the root. Its primary purpose is to provide retention for the core restoration when the remaining visible tooth structure is inadequate.

Preparing space for a post requires removal of some material from inside the root canal. Excessive preparation can weaken the root and increase the risk of perforation or fracture. For this reason, posts should be used conservatively and only when clinically justified.

When May a Post and Core Be Needed?

The procedure may be considered when:

• A root-treated tooth has lost substantial structure because of decay
• A large previous filling has failed
• A tooth has fractured above the gumline
• Insufficient structure remains to retain a core or crown
• A previous post or core has failed and the tooth remains restorable
• The final restoration requires additional retention

When Is a Post Usually Not Needed?

A post may not be required when:

• Sufficient healthy tooth structure remains
• The core can be retained using the existing tooth walls
• An adhesive build-up provides adequate retention
• The tooth will receive an onlay or another conservative restoration
• Post placement would remove excessive root structure
• The root anatomy makes placement unsafe or unpredictable

What Happens During the Assessment?

The dentist reviews the root canal treatment, remaining structure, symptoms, existing restoration, gumline, bite, and final restorative plan.

The assessment may include:

1. Clinical examination: Checking decay, fractures, core failure, and tooth structure.
2. Dental imaging: Reviewing the root canal filling, root length, surrounding bone, and possible infection.
3. Ferrule assessment: Determining whether sufficient natural tooth structure surrounds the tooth above the gumline.
4. Root assessment: Checking root thickness, curvature, cracks, and suitability for post preparation.
5. Bite evaluation: Reviewing grinding, clenching, and functional forces.
6. Restoration planning: Deciding whether the tooth requires a filling, onlay, or dental crown.

What Is the Ferrule Effect?

Ferrule refers to a band of natural tooth structure that surrounds the tooth above the gumline and is engaged by the final crown.

A suitable ferrule can improve resistance to functional forces and may be more important for long-term tooth survival than the post itself. When little or no natural tooth structure remains, additional restorative, periodontal, orthodontic, or extraction considerations may be required.

What Types of Dental Posts Are Available?

Fibre Posts

Fibre posts are tooth-coloured or translucent posts that may have mechanical properties closer to dentine than metal posts. They are commonly bonded within the prepared canal.

Metal Posts

Metal posts may be prefabricated or custom-made. They can provide retention but may affect appearance in selected front teeth and may transmit forces differently from fibre posts.

Cast Post and Core

A cast post and core is fabricated as a single custom component. It may be considered in selected teeth with extensive structural loss or unusual canal anatomy.

The post type depends on root anatomy, remaining structure, tooth position, final crown material, appearance, and retreatment considerations.

How Is a Post and Core Placed?

The procedure may include:

1. Root canal review: Confirming that the canal treatment is suitable for restoration.
2. Removal of temporary material: Accessing the canal and remaining tooth structure.
3. Post-space preparation: Removing part of the root-filling material while preserving an appropriate seal toward the root tip.
4. Post selection or fabrication: Choosing a suitable fibre, metal, or custom post when required.
5. Post placement: Cementing or bonding the post within the prepared canal.
6. Core build-up: Rebuilding the visible tooth structure around the post or remaining tooth.
7. Tooth preparation: Preparing the core for the planned crown or other restoration.
8. Final restoration: Placing a crown or another suitable restoration after the tooth is assessed.

Does the Post Reach the End of the Root?

No. A post is placed only within part of the root canal. Sufficient root-filling material should remain toward the root tip to maintain the endodontic seal.

The length and diameter of the post are selected according to root anatomy and the need to preserve tooth structure.

Can a Post Be Placed Immediately After Root Canal Treatment?

In selected cases, post-space preparation and core build-up may be completed soon after root canal treatment. Other teeth require a separate appointment because of symptoms, infection, temporary medication, restoration planning, or the need to confirm healing.

Does Every Post and Core Need a Crown?

Many teeth receiving a post and core require a crown because substantial natural structure has already been lost.

The final restoration depends on tooth position, remaining structure, bite, appearance, cracks, and functional demands. A post and core without an appropriate final restoration may remain vulnerable to leakage or fracture.

Can a Post and Core Be Used for Front Teeth?

Yes, when a root-treated front tooth has insufficient structure to retain the final restoration. Material choice should consider tooth colour, translucency, gumline, crown type, and the possibility of internal bleaching.

A post should not be placed solely because the tooth received root canal treatment.

Can a Post Be Removed?

Selected posts can be removed when root canal retreatment is needed, but removal may be technically difficult and carries risks such as root perforation, loss of structure, or fracture.

The ease of removal depends on the post material, length, cement, root anatomy, and remaining tooth structure.

What Are the Risks and Limitations?

• Root perforation during preparation
• Loss of root structure
• Root fracture
• Post loosening or debonding
• Core fracture
• Failure of the final crown
• Recurrent decay
• Persistent or recurrent root infection
• Difficulty removing the post if retreatment is required
• Need for extraction if the tooth becomes unrestorable

Can a Tooth with Very Little Structure Be Saved?

Possibly, but treatment depends on the amount and location of remaining structure, ferrule, root length, gum and bone support, cracks, bite, and ability to place a reliable restoration.

When damage extends deeply below the gumline, options may include periodontal crown lengthening, orthodontic extrusion, a different restoration, or extraction. Each option has limitations and requires individual assessment.

How Long Does a Post and Core Last?

No exact lifespan can be guaranteed. Longevity depends on root condition, remaining tooth structure, post design, core material, crown quality, bite, grinding, oral hygiene, decay risk, and maintenance.

How to Care for the Restored Tooth

• Complete the final crown or restoration as recommended
• Avoid hard chewing while a temporary restoration is present
• Brush twice daily with fluoride toothpaste
• Clean around the crown margin every day
• Avoid biting hard objects
• Manage grinding and clenching
• Wear a night guard when recommended
• Attend regular dental examinations
• Report movement, pain, swelling, or a change in the bite

Post and Core Build-Up on Sheikh Zayed Road

Bourgeois Dental Clinic is located on the first floor of Indigo Sky Building, Sheikh Zayed Road, Exit 41, near Al Thanya Street in Dubai. The clinic is accessible from Al Barsha, Umm Al Sheif, Umm Suqeim, Jumeirah, Al Quoz, Barsha Heights, The Greens, Dubai Marina, and surrounding areas.

Book a post-and-core assessment for a root-treated tooth with extensive structural loss, a failed core, or insufficient support for a final crown.