Method for applying guided intracanal action (apex-phoresis) in endodontic dental treatment

FIELD: medicine.

SUBSTANCE: method involves placing active electrode like metal conductor in canal and passive electrode on body surface zone and applying DC action. The metal conductor is coated with dielectric layer spread to its working part. The working part is brought close to impassable area through badly or well-passable zones of the root canal. Gap filled with electrolyte is left between the impassable area and electrode end. The active electrode is connected to electric current source plus terminal and the passive one to minus terminal.

EFFECT: enhanced effectiveness of treatment.

6 dwg

 

The invention relates to medicine, namely to physiotherapy and dentistry.

A similar method is transanally electrophoresis periodontal (see I. Efanov, TF Janakova “physical therapy of dental diseases”, Moscow, 1980, p.17).

The prototype of this method is depothresis copper-calcium (see “depothresis copper-calcium” A. Knappast, journal of Clinical dentistry” No. 2, June 1998), namely, that as the active electrode using a metal “needle” electrode connected to the negative pole of the power source, which is placed in the root canal, pre-filled copper hydroxide-calcium, a few millimeters (usually on the depth passable plot of the root canal).

The disadvantages of analogue (Figure 1) include the large size of the electrode (1) and its distance from bad passable (In) and passable (C) parts of the root canal of the tooth; the downside is the prototype (Figure 2) relatively large area of the needle electrode (1), as well as education “volume conduction”created conductive paste on the basis of copper hydroxide-calcium (2), and in both cases does not allow to create an optimum current density in bad passable (In) and passable (C) plots of the root canal due to shunting through well walkable the art of the root canal (A), that significantly reduces the effectiveness of the procedure.

The purpose of the invention is improving the quality of dental treatment with a partially navigable root canals through the use of local directional intrachannel effects of direct current (apex-phoresis).

In the basis of the method is the use of capable of dissolution in the process of electrolysis electrode-anode (Figure 3), consisting of a metal conductor (1), covered with a dielectric layer (2), and a dielectric layer covered the entire conductor is placed in a walkable part of the root canal of the tooth, with the exception of the working - active part of the electrode (3), where the dielectric layer is absent at a certain distance from the end face of the conductor (4) and the portion of the conductor outside of the tooth canal (5)connected to the current source (6).

A metallic conductor consists of one or more metal or made of a homogeneous core, covered with layers of other metals (Figure 4), for example copper core (1), silver-coated (2).

The overall diameter of the electrode does not exceed the diameter of the well passable plot of the root canal, and the length of the active part of the electrode is determined by the length of bad passable plot of the root canal.

After mechanical treatment of the root canal to cross and extend its bad passable parts of 10-15 is the size of the file in the root channel is wetted by the electrolyte solution, for example isotonic sodium chloride.

In the root canal electrode placed (Figure 5), through the good and bad part (B) plots of the root canal working active portion of the electrode (1) is brought to close contact of the end of the working part (2) with impenetrable plot of the root canal (S). Then the electrode is removed from the root canal by 0.5-1 mm (Figure 6), while between the working active part of the electrode (1) and impassable area of the root canal (S) creates a gap (L) 0.5-1 mm, filled with the electrolyte solution (F). The electrode is rigidly fixed at the mouth of the root canal using a dielectric, such as a wax, a thermoplastic mass, etc.

If necessary, the procedure in each root canal series.

The passive electrode is placed in the mouth or any other part of the body.

An active electrode connected to the positive power source, passive - minus.

Distinctive features of the proposed method are:

- Ability due to the small size of the active part of the electrode holding local directional impact of direct current, excluding current leakage through the well-walkable part of the root canal, creating a high current density in the immediate vicinity of the impenetrable part of the root canal.

An example of the calculation of the density of the Oka in the near-electrode space. L is the length of the active part of the electrode; d is the diameter of the active part of the electrode; So is the total area of the active part of the electrode; S - the area of the side surface of the active part of the electrode; St is the surface area of the end face of the active working electrode piece; I - current intensity; ρ - current density.

Let: L=1 mm; d=0.1 mm; I=1 mA.

The current density is calculated PA formula ρ=I/So

So=S+St; S=πdL; St=πd2/4.

S=3,14·0,1·1 mm2=0,314 mm2

St=3,14·0,12/4 mm2=0,008 mm2

So=0,314 mm2+0,008 mm2=0,322 mm2

ρ=1 mA/0,322 mm2=3,1 mA/mm2

- Soluble in the electrochemical processes of the electrode, to obtain soluble and insoluble metal compounds and saturation of exceptionally bad passable and impassable areas of the root canal of a tooth.

The proposed method is directed local intrachannel effects of direct current (apex-phoresis) allows to reduce the time and improve the quality of dental treatment with a partially navigable root canals.

The way local directional co-channel interference when endodontic treatment of the teeth, including the placement of the active electrode in the form of a metallic conductor in the channel, the passive electrode on the body and without the op perate DC, wherein the metal conductor is made of a homogeneous core, covered with layers of other metals, or consists of one or more metals, with a metallic conductor covered with a dielectric layer to its working parts, which through good and bad walkable areas of the root canal fail to impassable area, leave a gap between the impassable area and the end face of the electrode, filled with the electrolyte solution, then an active electrode connected to the positive power source, and passive to the minus.



 

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