We placed a dental post as part of rebuilding your tooth. This element is the internal anchor that will allow the composite core and permanent crown to hold correctly. Understanding what was done and how to care for it will help you have an uncomplicated recovery.

What is a dental post and why did you need it?

A dental post is an element inserted inside the root canal (the channel previously occupied by the tooth nerve) to provide additional retention to the composite core built over it. The post doesn’t replace the tooth — it is the internal foundation on which the reconstruction is built.

A post is needed when the tooth has so little remaining structure that a composite core alone would not have sufficient anchorage to hold itself inside the tooth. Without a post, the core and eventual crown could come loose.

Types of dental post:

Fiber glass post — Most common: The most widely used today. Flexible like the tooth, excellent aesthetics (doesn’t show through porcelain), biocompatible and easy to remove if needed. High fracture resistance.
Metal post (cast or prefabricated) — High strength: Very strong. Used in posterior teeth with high chewing forces. Can show through porcelain giving a grayish tint. Less flexible than fiber glass.

The post alone is NOT the final restoration. It is step 1 of 3: post → composite core → permanent crown. Without the following steps, the post serves no function and the tooth remains vulnerable.

What was the sequence in your case?

First, root canal treatment was performed to treat or prevent infection.
The canal was cleaned, shaped and sealed with obturation material.
Today the canal was prepared to receive the post and it was cemented inside the root.
The composite core was built (or will be built) over the post.
Next appointment: impression or digital scan to fabricate the permanent crown.

After the Anesthesia

What you’ll feel leaving the clinic

Local anesthesia can last 2-4 hours. The tooth area and surrounding tissues will be numb during that time.

Don’t eat until anesthesia wears off (Important): With your lip, cheek or tongue numb it’s very easy to bite yourself without feeling it. Wait until sensation fully returns before eating anything solid.
Take the pain reliever before anesthesia wears off (Important): About 2 hours after the procedure, when anesthesia starts to fade, take the prescribed pain reliever preventively. Much more effective than waiting for intense pain.
Sensation of different bite: If a temporary crown was placed or the tooth was temporarily rebuilt, the bite may feel different. Normal and adjustable if it persists more than one week.

Pain and Sensitivity: What to Expect

Discomfort level depends on what was worked on today

If the post was placed in a tooth with recent root canal: There may be moderate sensitivity in the gum and periodontal ligament (tissue surrounding the root externally) for the first days. The tooth has no internal nerve but the external tissue can respond.
If the tooth had a previous root canal: Discomfort is usually minimal. There may be some bite sensitivity the first 1-3 days as the ligament adapts to the procedure.
If the core was also rebuilt today: If both post and core were placed in the same appointment, there may be temperature sensitivity (cold/heat) and bite sensitivity for 1-2 weeks as the tooth adapts.

Day 1-3 — Mild discomfort when biting (Normal): The most common discomfort. The periodontal ligament responds to the work done on the root. Manageable with pain relievers.
Day 3-7 — Progressive improvement (Improving): Discomfort should clearly decrease. If there’s a temporary crown, the bite may start feeling more natural.
Week 2+ — No discomfort (Good): The tooth should function without pain. The gum and ligament have adapted. Ready for the next step: the crown.

If pain is very intense from the start, doesn’t improve with medications, or if after day 5 it worsens instead of improving, let us know. It may indicate a problem with post cementation, a fracture or root complication.

Prescribed Medication

Follow the instructions exactly

Take the pain reliever BEFORE the anesthesia wears off — the key to a first day without intense pain.

Pain Reliever / Anti-inflammatory — Ibuprofen 400-600mg or Acetaminophen as indicated: To control pain and periodontal ligament inflammation the first days. Take with food according to the prescribed schedule.
Antibiotic (if prescribed) — As prescribed: Not always prescribed after post placement. If we prescribed it, complete the full course even if you feel better. Generally indicated if there was active infection or the procedure was more complex.

Avoid aspirin — it can increase tissue bleeding. If you take anticoagulants or other medications, let us know if you have compatibility questions.

The Temporary Crown — If Placed Today

Protects the post and core while the permanent crown is made

If a temporary or provisional crown was placed today over the post and core, follow these additional instructions:

The temporary crown is cemented temporarily. Its function is to protect the internal structure and maintain aesthetics while we fabricate the permanent crown in the laboratory.

Do:

Brush it gently like any other tooth
Use it to chew soft and moderate foods
Pass dental floss carefully, sliding it sideways without sharp upward pulls
Let us know if it loosens, moves or falls off

Don’t:

Don’t eat very hard or sticky foods on the temporary side
Don’t use the temporary tooth to bite hard non-food objects
Don’t ignore it if it feels loose — call the clinic
Don’t postpone the permanent crown appointment

Did the temporary crown fall off?

Not a medical emergency but requires prompt attention. The post and core are left exposed. Contact us to re-cement it. In the meantime, avoid eating on the affected side. Don’t try to glue it with household adhesive.

Eating for the First Days

Careful eating protects the newly cemented post

Always eat on the OPPOSITE side from the tooth with the post
Soft foods the first 3-5 days
Moderate temperature — avoid extremes that cause sensitivity
Cut foods into small pieces
Avoid chewing gum — it can pull on the temporary crown

Fine to eat

Yogurt, custard, gelatin
Eggs prepared any soft way
Warm soups and broths
Very well cooked pasta
Soft rice
Soft boneless fish or chicken
Mashed potato or vegetables
Banana and soft fruits

Avoid the first days

Very hard or crunchy foods (nuts, chips, ice)
Very sticky foods (chewy candies, taffy, gum)
Biting directly with the treated tooth
Very cold or hot drinks if sensitive
Foods requiring intense chewing

Hygiene with Post and Core

Keeping the tooth margin clean is essential

The tooth with the post remains vulnerable to decay at its edges and at the gum margin. The temporary crown doesn’t protect perfectly — hygiene in that area prevents bacteria from compromising the tooth before the permanent crown is placed.

Gentle brushing 2-3 times daily: Brush the tooth with the temporary crown like any other, with soft bristles. Pay attention to the gum margin. No need to avoid that area — keeping it clean is important.
Dental floss with special technique: Pass floss sliding it downward between teeth and removing it sideways (not upward with a sharp pull). Pulling upward can dislodge the temporary crown.
Alcohol-free mouthwash: If using mouthwash, choose one without alcohol. Alcohol can degrade the temporary crown cement with prolonged use.

Visually check that no food is trapped under the temporary crown margin
If the tooth feels ‘different’ or you notice a persistent unusual taste, there may be leakage — let us know
Once the permanent crown is placed, resume your complete normal hygiene

The Complete Path: From Post to Crown

The post is the foundation — here’s what comes next

Today: Post + Core — Completed: The internal anchor is in place. The composite core was built over the post to shape the abutment that will receive the crown.
Healing and adaptation — 1-3 weeks: The gum around the margin of the prepared tooth needs to stabilize. The temporary crown maintains the space and shape during this time.
Impression or digital scan — Scheduled appointment: We take the exact measurement of the abutment for the laboratory to fabricate your custom crown.
Crown fabrication — 1-2 weeks in laboratory: The dental laboratory fabricates your crown with the chosen material (porcelain, zirconia, metal-ceramic) precisely matched to the color and shape of your teeth.
Try-in and permanent cementation — Final appointment: We try the crown, adjust bite and color, and permanently cement it over the post and core.

Don’t postpone the permanent crown appointment. The temporary crown is not a permanent solution — it can loosen, lose its seal or fracture. Each additional week of unnecessary waiting is risk for the post and core.

Warning Signs

When to contact us

Contact the clinic if you experience:

Very intense pain that doesn’t respond to pain reliever: Post-placement discomfort is mild to moderate and manageable with medication. If pain is very intense or unbearable, it may indicate a complication.
Pain that worsens after day 5: Discomfort should progressively decrease. If it worsens after day five, something needs evaluation.
Temporary crown fell off or loosened: Post and core are left unprotected. Contact us that day to re-cement it.
Sensation of tooth ‘cracking’ or making noise: A cracking sound or sensation when biting may indicate the post is failing or there is a micro-fracture in the root. Requires urgent evaluation.
Swelling in the gum around the tooth: May indicate infection in the root or periapical tissue. Requires evaluation and possibly additional treatment.
Persistent metallic or unpleasant taste: May indicate leakage of post cement or contamination in the area. Let us know.

This is completely normal:

Mild sensitivity when biting the first 1-5 days
Mild gum discomfort the first days
Bite feeling different with the temporary crown
Tooth feeling different when touched with tongue
Small change in pronunciation if it’s a front tooth

Recovery Keys

Take pain reliever before anesthesia wears off
Always eat on the opposite side
Care for the temporary crown — it’s temporary but essential
Gentle floss technique to avoid dislodging the temporary
Don’t postpone the permanent crown appointment
Let us know if there’s intense pain or the temporary falls

Frequently Asked Questions

What exactly does the post do if the composite core already holds the crown?

The composite core needs an anchor point inside the tooth to avoid coming loose. When the tooth doesn’t have enough own structure, the post provides that anchorage inside the root canal. It’s like the foundation of a building — not visible, but without it the structure collapses.

Can the post fracture the root?

A correctly selected and cemented post doesn’t fracture the root. Modern fiber glass posts are especially safe because they have flexibility similar to the natural tooth, distributing forces without concentrating them. Rigid metal posts carry more theoretical fracture risk, especially if the tooth receives lateral forces.

How long after the post can the crown be placed?

Generally 1-3 weeks after placing the post and core, to allow the gum around the abutment to stabilize. The exact time is determined by the dentist based on tissue progress.

Can the post be removed if needed?

Yes, although it’s not a simple procedure. Fiber glass posts are easier to remove than metal ones. It may be necessary in case of new root infection or if the root canal needs to be redone.

Does placing the post hurt?

The procedure is performed with local anesthesia so you should feel no pain during placement. The tooth no longer has a nerve (treated in the root canal), although external tissues may be sensitive afterward.

What happens if I don’t get the crown after the post?

The post and core alone are insufficient for normal chewing function. Without the crown, the core can fracture or become contaminated, and chewing forces can fracture the root. The crown is the definitive protection that completes the system.

Is the post visible on X-rays?

Yes. Metal posts are very clearly visible on X-rays. Fiber glass posts are also visible though with less contrast. This allows the dentist to verify their position and condition at each check-up.

How long does a dental post last?

A well-placed post can last decades — as long as the tooth itself lasts. The lifespan of the complete system (post + core + crown) depends primarily on hygiene, absence of untreated bruxism and regular check-ups.

Care After Dental Post Placement