A complete guide to re-nervation of teeth (Re-endo)

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چرا دندان عصب‌کشی شده دوباره به درمان نیاز پیدا می‌کند؟
مراحل عصب کشی مجدد دندان (درمان مجدد ریشه دندان) قدم به قدم
آیا عصب کشی مجدد دندان دردناک است؟
- مدیریت درد حین و بعد از درمان مجدد ریشه
- علائم هشدار که نیاز به مراجعه فوری دارند
عوارض عصب کشی مجدد دندان چیست؟
شکستن فایل در درمان مجدد ریشه؛ Why does it happen and what should be done?
Durability and care after root canal treatment
- % What is the success rate of root canal treatment?
- Instructions Care to increase the durability of endodontic treatment
Alternatives What are reinnervation of teeth?

Some teeth will experience pain, infection or sensitivity again with the passage of time or due to treatment errors. In such cases, root canal treatment may be needed to save the tooth and save it from extraction.

Re-nervation or root canal treatment is a process in which the previous root canal treatment is completely revised and corrected. In this method:

The previous filling material is removed from inside the tooth.
The root canals are carefully disinfected.
It is filled and sealed again with new material.

This process is necessary when the previous treatment was not successful or after some time, the tooth becomes infected, painful or sensitive again.

The main reason for the failure of primary root canal treatment (cause of re-nervation of the tooth)

In many cases, the reason for the need for re-treatment is due to things that were not properly managed in the initial nervation. Some of the common reasons:

complexity of the canal anatomy that causes part of the roots to be overlooked
incomplete or poor filling of the canals
bacterial re-infiltration due to cracks, decay or insufficient restoration
forgetting one of the sub-canals (which is seen in 28% of cases)
fracture of the lining or filling causing re-infection of the canal can be

Symptoms that may indicate the need for re-nervation of the tooth are:

Continuous pain or pressure in the re-nervated tooth
Long-term sensitivity to heat or cold
Abscess or pus discharge around the tooth
Swelling or inflammation of the surrounding gums Teeth
Tooth discoloration or loosening

If you have any of these symptoms, it's time to consult a root canal specialist.

Re-nervation of the tooth or the re-treatment of the tooth root is a specialized and precise treatment that is carried out in several steps. Next, we review the steps of this treatment in simple language:

Identification Accurate and removal of old materials

At first, the dentist examines the condition of the roots using imaging (such as radiography or digital CT scan) to determine the exact location of the infection or identification problem and the forgotten or blocked root canals.

Then, if the tooth has already been veneered, the veneer is removed to provide access to the inside of the tooth. After that, the old filling material is removed with specialized tools.

and deep disinfection of the canals

After removing the previous material, the root canals are cleaned and disinfected. This step is very important; Because:

Any dead tissue, bacteria or residual secretions are removed.
Disinfectant drugs are placed in the canal to be fully effective.

In cases where the inflammation or infection is severe, this step may be done in two sessions and special medicine is placed inside the tooth between sessions.

full Root canal and tooth crown reconstruction

After making sure the canals are clean, they are filled with a material called gutta-percha. This material completely fills the empty space and prevents bacteria from re-infiltrating.

At the end, the tooth is restored with a temporary or permanent restoration. If the tooth needs strengthening, a new coating is placed on it to maintain its function and natural appearance.

Is tooth re-nervation painful?

No; With local anesthesia, the treatment is done without pain. You may only have a little pain or temporary sensitivity after the treatment, which will be relieved with painkillers.

Pain during and after root canal retreatment

During the treatment, local anesthesia makes you feel no pain. After the work:

The tooth may be a little sore or sensitive for the first few days, especially when chewing.
The use of painkillers prescribed by the dentist is usually sufficient.
Using a cold compress on the first day can reduce the inflammation.
In rare cases, if the pain is severe or prolonged, you should definitely contact the doctor.

If you have the following symptoms, go to the dentist quickly:

Severe and prolonged pain
Swelling or discharge of pus
Fever or bad breath

Complications that may occur in re-nervation include:

Temporary pain or sensitivity after treatment
Possibility of treatment failure in case of high complexity of the canals
Cracking or fracture of the tooth in case of weak structure
Re-infiltration of bacteria in case of incomplete seal
Breaking of the treatment tool inside Root (in rare cases)

File in root retreatment; Why does it happen and what should be done?

Sometimes the very thin instrument used to clean the canals may break inside the tooth. This happens mostly in teeth with a narrow or twisted canal.

If the broken piece does not cause an interruption in the treatment path, it may not be necessary to remove it.
In certain cases, the dentist will remove it with special equipment or continue the treatment through an alternative path.

and care after root canal treatment

With proper care, a tooth that has undergone root canal treatment can last for years or even for the rest of its life.

% What is the success rate of root canal treatment?

The success rate of re-nervation is estimated between 70 and 90%.

How long is the tooth after re-nervation?

If the treatment is done correctly and the patient observes oral hygiene, this tooth can remain for decades. Covering the tooth after re-endo also plays an important role in increasing its lifespan.

Avoid chewing hard foods on the treated tooth in the first days.
Clean the teeth twice a day with a soft toothbrush.
Make sure to use dental floss.
For periodic examination, visit the dentist as recommended by the doctor.
If the tooth needs a permanent crown, in Do it as soon as possible.

Substitutions What are tooth re-nervation?

Sometimes the condition of the tooth is such that re-nervation cannot be done or the probability of its success is low. In these cases, the dentist may suggest alternative methods.

Epichoectomy is a specialized surgery in which the tip of the tooth root is removed along with the infected tissue around it. This procedure is usually performed when:

Re-nervation alone is not sufficient.
A part of the root canal is not accessible.
Or the infection is limited to the end of the root.

Teeth and replacement with implants or bridges

If none of the treatments are successful, tooth extraction is the last option. After that, to maintain the health of the mouth and prevent the displacement of the adjacent teeth, it is usually recommended to perform a dental implant or a bridge.

table Comparison: Root canal treatment vs. implant

Features	Tooth reinnervation	Dental implant
Tooth preservation Natural	Yes	No
Duration of treatment	Shorter (1 to 2 sessions)	Longer (several months)
Cost Approximate	4 to 6 million Tomans	15 to 30 million Tomans
Surgery required	Yes	No
The degree of aggressiveness Treatment	Less	More
Permanence if successful	Very High	Very High

Cost of tooth re-nervation

cost Re-treatment of the tooth root and re-nervation

The cost of re-nervation of the tooth may be a little more than the initial treatment, because this treatment is more specialized and complicated; But compared to implant cost or bridge, it is still a more economical option to preserve natural teeth.

factors Affecting the cost of re-nervation of the tooth

The final cost varies depending on the following factors:

The position of the tooth in the mouth (anterior, posterior, molar)
The number of root canals and the degree of complexity of the treatment
The need to remove the veneer or previous restoration
The amount of inflammation or infection present
Use of auxiliary drugs or More sessions
Geographic location of the office and dental tariff

Treatment option	Approximate cost range	Benefits	Disadvantages
Tooth reinnervation	4 to 6 million Tomans	Preserving natural teeth, without surgery	Lower success in damaged teeth
Dental implant	15 to 30 million Tomans	High durability, no decay	Surgery, high cost, time consuming
Tooth extraction + bridge	8 to 15 million tomans	faster replacement than implant	cutting healthy lateral teeth

What Does anyone have to perform re-nerve removal?

It is better to have this treatment done by a nerve removal specialist (endodontist); Because it requires high precision, advanced equipment and skill in managing complex channels.

How often can a tooth be re-nervated?

As long as the tooth structure remains healthy, re-treatment is possible up to two or even three times. Of course, the probability of success decreases each time.

Should the veneer be replaced for a veneered tooth?

If the veneer is healthy and can be removed and reinstalled without damage, replacement is not necessary; But in many cases, a new coating is recommended.

Risks What is reinnervation of an infected tooth?

If left untreated, the infection can spread to the jawbone, cause an abscess, and eventually lose the tooth.

Can a covered tooth be re-nervated?

Yes; By removing the veneer or in some cases by drilling it, it is possible to re-treat the root.

Re-nervation is another chance to save a tooth that can still be with you for years. By visiting an experienced specialist and performing treatment at the right time, you can avoid pain, infection and additional costs without needing to extract teeth.

Preserving your natural teeth is always our priority; If you have doubts about the need for re-nervation or you are looking for a reliable dentist in East Tehran, contact Setare Shargh Dental Clinic right now: 021-91093560

Consult with a nerve removal specialist and learn about The price of dental denervation and the exact treatment tariff are only one call away.

Last updated on December 24, 1404 by East Star Writers Team

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Scientific review and validation

This article has been reviewed by a specialist doctor and the scientific accuracy of its information has been confirmed. You can use this content with confidence.

Dr. Mohammad Marvi Nervation