Filling of tooth canals: methods and materials

Earlier in the domestic dentistry, tooth filling was practiced by means of a special paste. The method was very unified and quite cheap. However, not every paste has the necessary fluidity to completely cover all minute channel holes. In addition, pastes contribute to the formation of voids, are subject to severe shrinkage and resorption, which causes the opening of channels and the development of the inflammatory process.

Also substances can cause an allergic reaction. Because of all the negative properties of such a method has long been not practiced. In place of innovative methods that have a high level of efficiency.

Filling of tooth canals

Features of filling

Timely filling of tooth canals at a professional level with the elimination of periodontitis and pulpitis is the key to the absence of complications in the future. The main requirement at this stage of therapy is a high degree of sealing reliability, which excludes the possibility of penetration of pathogenic microorganisms and the integration of the canal with the dental cavity and periodontium.

Since the root canals differ in narrowness, an important step in the preparation for filling is their expansion, as well as an improvement in the cross-country capability.

A person who does not understand all the nuances of the dental profession, it is difficult to make a choice. Doctors do not always have enough time to tell the patient about all the advantages and disadvantages of this or that method. Therefore, the patient chooses the most appropriate for the duration and price option, the use of which is not always appropriate.

The article will deal with the existing methods of sealing in dentistry, the materials used, as well as the pros and cons of all methods.

Sealing materials

Sealing of the root canals of the teeth is the filling of the cleaned cavity with a special material. Since the root canals go deep into the gum, the filling material is in constant contact with the periodontium. Thus, canal filling is an operation to replace damaged tissues with artificial contents.

Materials for sealing root canals must meet a number of requirements:

  • They must have absolute tightness, protect the channel from infection.
  • An important component is the absence of allergic reaction, dissolution and decomposition when in contact with periodontium and tissue fluid.
  • Substances should have contrast to the X-ray. In the image, they should be displayed clearly. Otherwise, it will be very difficult for the dentist to understand how well the sealing procedure was performed.
  • If the manipulation fails, the seal should be easily removed from the root canal. In addition, when hardening, the substance must shrink, and cavities filled with air should not form inside.

For a number of years, root canal filling has undergone some changes. Many different methods have been tried. However, the universal material, which would meet all the above criteria, was never invented. That is why it is customary in modern dentistry to use combined formulations.

Filling of the root canals of teeth

The main stages of preparation for the filling process

The filling of the canal of the root of the teeth implies a number of steps:

  • All tissues affected by caries should be removed. A dentist can also remove uninfected parts of the tooth to open up free access to all channels.
  • The nerve of the tooth is removed. And the sealing of the channels is then possible. The pulp from the root and crown canals is also removed.
  • The doctor determines the length of each channel.
  • By means of a special tool the dentist goes through the entire length of the canals to the root apex, and also extends the diameter to the required value.
  • The immediate sealing process is carried out.

Nerve removal and canal filling

Determining the length of root canals

Qualitative filling of tooth channels assumes filling the channel with material to the top of the root. If the treatment is performed poorly, then the infection gets into the lumens. Over time, the inflammatory process can spread to the very tip of the root.

The most common cause of poor-quality tooth filling is an incorrect measurement by the dentist of the length of the canal. As a result, the doctor does not process the entire length.

If this parameter has been determined incorrectly, periodontitis may develop or a cyst may appear. As a result, the tooth will have to be removed. If the seal is reinserted, the patient may begin to complain that after filling the canals, the tooth hurts when pressed. It is not excluded the development of the inflammatory process. Therefore, measuring the root canal is an important part of the treatment. The dentist performs the procedure by means of special fine instruments. After the manipulation, take a picture. So the doctor will be able to determine if the tip of the root end instrument has reached.

After filling the canals, the tooth hurts when pressed


It involves the process of extending the root canal. Channels that do not stall such processing remain narrow. They are inconvenient to fill with a substance for sealing.

Machining facilitates the expansion of the channel and the elimination of all irregularities and cracks present in it. The channel expands to the desired size.

There are two types of machining: manual and mechanical. The latter method involves the use of a special tip. It inserts pro-files from titanium. With the help of the tip, the pro-files in the channel rotate, which helps to remove the chip from its walls and expand it. After such manipulation, the process of filling the channels is carried out.

Method of root canal filling by means of gutta-percha

How is the filling of the canals made? Materials, as noted, are used differently. One of them is gutta-percha. It is firm and elastic.

The substance has excellent characteristics:

  • low toxicity;
  • Biocompatibility;
  • ability to completely fill the root canals in the warm state;
  • simplicity of removal if necessary.

There are a number of ways to seal channels with this material.

Method of one paste

In this case, the channel is closed with an elastic gutta-percha paste, which then hardens. This method in the vast majority of cases causes complications, so its use is inexpedient.

Method of a single pin

Methods for filling teeth canals involve the use of a pin. After the root canal was filled with paste, a similar device from gutta-percha is introduced into it. This method is also fraught with complications.

Side condensation method

This is the most commonly used sealing method, during which a sealer is used. The effectiveness of this method is directly dependent on how well the surface is cleaned for manipulation.

Side condensation stages

The main stages of the process are:

  • Placement of the central pin. Before this process, a selection is made, depending on how much the channel is expanded.
  • The sealing area is carefully dried by means of pins made of paper.
  • Then the introduction of the silo is carried out.
  • The main pin is inserted.
  • The pin is pushed back to the tooth wall.
  • Additional pins are introduced, which are pre-lubricated by the sealer.
  • The lumen is filled with material until it is fully sealed.
  • Surplus material is removed.
  • Condensation of gutta percha occurs at the mouth of the canal.
  • Therapeutic procedures are performed in the oral cavity.

Varieties of pastes for sealing channels

  • Pastes containing zinc and eugenol. They are used to close the channels of all kinds of teeth. Their minus is the rapid washout from the root. Also, such substances can cause irritation of the dental tissue.
  • Resorcinol. It has been used in dentistry for many years and has the ability to change the color of the tooth.
  • FORFENAN.During the polymerization period, it heats up in the channel, contributing to the release of a substance penetrating into the tubules at the sides. The pulp turns into an insoluble formation.
  • Endomethasone - is not subject to resorption and provokes irritation.

Key requirements for materials for sealing

A number of requirements are put forward for materials that are used for sealing. Their presence provides reliability, durability and safety of the conducted manipulations. Undoubtedly, it is difficult to envisage all the norms, but they should not be neglected when choosing the material for sealing.

The basic requirements include:

  • reliability when sealing
  • no toxic substances;
  • high level of biocompatibility;
  • low shrinkage;
  • is a simple method of sterilization;
  • optimum level of sensitivity to X-rays;
  • easy removal;
  • no effect on the color of tooth enamel.

Filling channels with hot gutta-percha

Methods of filling the canals with gutta percha are different:

  • gutta-percha injection in liquid form;
  • continuous wave method;
  • vertical condensation;
  • introduction of gutta-percha by means of a syringe.

Methods of filling the canals of teeth

Thermal Filling Method

The "Thermophile" system involves filling the tooth channels with hot gutta percha. When the channel is filled, the material cools and becomes solid. This method has a high level of efficiency, but requires professional training of the doctor and considerable money.

When heated, the gutta percha acquires elasticity, which ensures tight closure of the dental canal system.

The tightness of the material reduces the likelihood of penetration into the tooth infection. This system was invented after tools appeared, by means of which it became possible to effectively process the channels.

The plastic pins together with the hot gutta percha are inserted slowly into the channel. Under pressure, the material fills all channels and branches. This method was called "volumetric filling", as the whole system of root canals is hermetically sealed.

The main advantages of the "Thermophile" system include:

  • high level of tightness;
  • minimal risk of infection in the canal;
  • low toxicity;
  • no pain after filling;
  • speed of the therapeutic procedure.

Thermophil System

Depophoresis application

This method makes it possible to treat teeth that have curved and inaccessible canals, as well as to conduct dental therapy, which have already been sealed. Also, the method makes it possible to seal the unit, in the channel of which there is a fragment of the dental instrument.

After the manipulation, the patient usually does not have any pain.

Application of a silver pin

Metals have been used to seal channels for many years. Widespread use of gold, silver and lead, as these substances have elasticity.

In dentistry, silver pins have been used since the 1920s. Silver was chosen because of its antibacterial properties. In addition, it is sufficiently soft metal, which makes it possible to install the pin directly into curved channels.

To date, the antibacterial effect of silver has been scientifically proven. Pure silver is not poisonous and does not cause irritation. However, with prolonged contact of the argentum with tissue fluids, as happens when the pin is in the root canal, oxidation of the metal takes place. In the event of corrosion, silver sulfate with a toxicity is released. This can trigger the onset of an inflammatory process in nearby tissues. In this regard, the pins of silver in dentistry are practically not used.

With regard to the physical characteristics of the metal, the pins from it can easily be inserted into the canal of the tooth root, have a high level of contrast to the X-ray. However, the devices do not provide quality sealing. They are recommended to be used in conjunction with root sealants.

If necessary secondary treatment, these pins are extracted from the tooth canal with ease. There are cases when manipulation involves a number of difficulties or is not subject to implementation at all.

What if I have a toothache after the filling?

Many people are interested: how much can the tooth hurt after filling up the canals? If the tooth aches a bit during 1-2 days, then it is considered the norm.

If the patient experiences intense pain, this may indicate a complication:

  • the presence of perforation of the root walls;
  • insufficiently successful sealing;
  • finding of a tool fragment in the channel;
  • unsuccessful treatment with antiseptics;
  • removing the material for sealing at the tip of the root.

How long can the tooth ache after filling up the canals?

Therapy in case of complication

What if the tooth hurts after filling the canals? When perforations occur, the treatment begins with X-ray diagnostics. This method makes it possible to visualize the state of the root lumen. If the perforation has occurred, the instrument, when pressed on the tooth, begins to fail, the gum bleeds, and the patient complains of pain. In this case, the therapy involves sealing the perforation with a filling material.

If the tooth hurts after the filling of the canals because of the presence of the rest of the tool in it, then the tooth will lie to the removal.

It happens that the sealing was performed poorly. Therapy involves re-cleaning and sealing.

If there are lumens in the root that do not contain the material for sealing, an inflammatory process may occur. In this case, you can not hesitate to contact a specialist.

When removing material to the top of the root, treatment depends on the severity of the case.

Sealing of the channels of infant teeth

Sealing of the canals of temporary teeth( dairy) in children differs from the manipulation performed with an adult patient due to the structure of the child's teeth.

Filling of temporary canal channels

When the temporary tooth should change to a constant, its roots begin to resolve, only the upper part remains. Therefore, root canals are to be sealed with a special paste, which is also subject to resorption. It is this method that makes the eruption of permanent teeth unobstructed.