RU2226359C2 - Method for setting dental electrode for recording blood circulation in intact blood pulp - Google Patents

Abstract

FIELD: medicine. SUBSTANCE: method involves taking silicon polymer imprint in advance in a way it embraces teeth adjacent to one under study. A hole having its diameter less than electrode diameter is drilled in the projection of the tooth under study. The imprint is set in the oral cavity. Means for reducing electric resistance is introduced into the imprint hole. The electrode is fixed in the hole by introducing it as deep as possible. EFFECT: high accuracy of measurements.

Description

The invention relates to medicine, namely to dentistry

A known method of installing a tooth electrode during rheography is that the test tooth is dried with dry cotton swabs, isolated from saliva with cotton rolls, a cotton pad moistened with a warm 0.9% isotonic NaCl solution is placed under the tooth electrode, then the tooth electrode is put on on the free end of the wire structure, designed to give mechanical pressure to the electrode surface against the tooth, is applied to the fissure of the chewing teeth or the carious cavity, or the cutting edge of the front tooth (Black tykovtsev V.N. Pulp of a tooth: Modern diagnostic methods. - M., 1999, p.99).

The disadvantage of this method is the low accuracy of the recorded blood flow indicators due to unstable contact between the tooth electrode and the hard tissues of the tooth, and also due to the negative effect of changes in humidity and temperature during breathing on the electrical contact.

The design, designed for mechanical pressing of the electrode surface to the tooth, does not provide immobility of the electrode relative to the hard tissues of the tooth, which leads to an instability of the electrical contact, distorting the registration of blood flow.

The objective of the invention is to improve the accuracy of registration of blood flow of intact tooth pulp by ensuring complete immobility of the electrode in place of its contact with hard tooth tissues and isolation from changes in humidity and temperature.

This is achieved due to the fact that the mold is first taken from the silicone material so that it covers adjacent teeth; then a hole with a diameter smaller than the diameter of the electrode is drilled in the mold in the projection of the tooth under study; the mold is installed in the oral cavity; means are introduced into the hole to reduce electrical resistance at the contact point; then immerse the electrode in the hole until it stops.

The creation of mechanical immobility, isolation from moisture, constantly present in the oral cavity due to the release of saliva and vapors in the exhaled air, can be achieved by providing a tight fit to the crown of the teeth and alveolar process. The anatomical structure of the oral cavity is so individual that it creates great difficulties in this regard.

To obtain a structure that fixes an electrode in the oral cavity for recording a reoentogram and isolates the contact site from the environment, an elastic impression mass based on silicone polymers was used. Silicone masses have great elasticity, strength, lack of shrinkage and the ability to maintain their properties for a long time (up to several hours), including when in a humid environment.

The method is as follows: first, a cast of silicone material is taken so that it covers the teeth adjacent to the test, the cast is taken out, a hole with a diameter smaller than the diameter of the electrode is made in the cast in the projection of the test tooth, the test tooth is dried with dry cotton swabs or a stream of compressed air. The mold is installed in the oral cavity, a means is introduced into the hole that reduces the electrical resistance at the contact point, after which the electrode is immersed into the hole until it stops.

Clinical example

To ensure high-quality orthopedic treatment with veneers of 11 and 21 teeth in patient K., it was decided to anesthetize using intraseptic anesthesia with hemodynamic control in the pulp of these teeth. In this case, the proposed method of installing a dental electrode was used to record the blood flow of the intact tooth pulp.

At the beginning we produce an impression of the frontal group of teeth of the upper jaw: 12, 11, 21 and 22 teeth. In order for the impression block to be correctly obtained and have sufficient mechanical strength, we select the shape and size of the impression spoon, trying it in the mouth, the shape and width of the dentition, and the topography of the study area. To obtain sufficient mechanical strength of the impression, we make sure that the sides of the spoon are at least 3 mm from the teeth and the edges of the spoon reach the transition fold, then the layer of material between the bottom of the spoon and the teeth will be 2-3 mm. To obtain a print we use a rigid metal perforated spoon.

The BISICO Putty impression mass (the first layer according to the two-stage impression technique) is mixed in the required amount until a homogeneous consistency is achieved and we fill the impression spoon with it. Then we put the spoon with the mass into the patient’s oral cavity and press it to the teeth. After about 3 minutes (according to the instructions), the impression is removed from the oral cavity and the resulting silicone block is released from the impression spoon.

In the projection of 11 and 12 teeth in a silicone block, we make holes with a spherical bur 2 mm in diameter, fixed in the direct tip of a mechanical micromotor, at a boron rotation speed of 30 thousand rpm so that after installing the impression in the mouth, electrodes 1 in diameter inserted into these holes 8 mm was in contact with the wall of the teeth at the equator level, where according to the data of N.G. Abolmasov (1967) and B.S. Klyuev (1972), the thickness of the walls of the tooth cavity is the least. We make holes in the projection of the teeth from the lingual side, because the vestibular side will subsequently be dissected.

With a stream of compressed air, we dry the impression, the teeth and gum under study around them, after which the impression is placed in the oral cavity. From a syringe filled with “Elkogel” electrode contact gel, we squeeze a small amount of gel onto the tip of the needle and place it in one of the holes, after which we insert the electrode into it all the way. After that we connect the electrode to the “RPKA2-01” device, which is produced by the Scientific and Technical Center “MEDASS”, and proceed to registering the reententogram.

Claims (1)

A method of installing a dental electrode for recording blood flow of an intact tooth pulp, which consists in fixing the electrode relative to the hard tissues of the tooth under study and introducing a means that reduces electrical resistance to the contact point, characterized in that the impression is made from an elastic impression mass based on silicone polymers, covering neighboring the teeth being examined, in the projection of the tooth under study, a hole is drilled in the cast with a diameter smaller than the diameter of the electrode, a cast is placed in the mouth lethargy and its opening is administered agent that reduces electrical resistance at the contact, and then fixed by immersing the electrode into the hole until it stops.