SU762850A1 - Method of diagnosis of tooth tissue destruction - Google Patents

Description

The invention relates to the field of medicine, namely dentistry.

A known method for the diagnosis of destruction of dental tissues by measuring the electrical parameters of the tooth £ ΐ], ’

However, the known method does not allow to determine the beginning of the destruction of tooth enamel.

The aim of the invention is to determine _n division start destruction of tooth enamel. ' ⁰

This goal is achieved by measuring the potential difference with the help of a contact electrode and a reference electrode and by the potential value below 83.7 ± 26.62 mV with respect to 15 to the reference electrode determine the beginning of the destruction of the tooth enamel.

The method is as follows.

A standard chlorine silver electrode of the type EVL-1-M 3 is taken as the reference electrode 20. A potentiometer is used as a device for measuring the potential difference. It is a millivoltmeter pH-121. 25

The reference electrode is immersed in a vessel with a saturated solution of potassium chloride, in which also one arm of an electrolytic “switch, which is a curved

2

An arcuate glass tube filled with the ferruginous mass of agar-agar and a solution of potassium chloride.

As a contact electrode, which serves to close the circuit by touching the tooth under investigation, they take a platinum electrode.

The reference electrode is connected to the same terminal of the pH 121 potentiometer, and the free end of the electrolytic key tube is inserted into the oral cavity of the patient and immersed in the saliva closer to the test tooth. A platinum contact electrode, connected to the second terminal of the potentiometer, touches the tooth under investigation. At the moment of contact, the external circuit of the galvanic cell formed by the reference electrode is closed, immersed in a solution of potassium chloride and a tooth connected to it by an electrolytic key, in contact with soft tissues and saliva.

When the external circuit is closed, the potentiometer arrow will deviate, since the electrodes of this galvanic element - the metal reference electrode and the tooth itself, both have relative 762850

If the χ normal hydrogen electrode has a positive potential, then the direction of the arrow deflection (the direction of the current in the external circuit) will depend on which electrode _ in the common circuit will be "relative plus or minus.

Since in this example the reference electrode is chosen "specifically so

• the way that its potential is relatively / normal hydrogen

'electrode (0,222 in) was slightly less than the potential of a healthy tooth also relative to hydrogen

 electrode (not less than 0.282 in), then with the Healthy tooth the arrow will deviate and. will show approximately ¢ 0 mV (sometimes more). Such readings of the instrument indicate that the tooth is healthy.

If the instrument readings are

// less than 60 mV, then it will indicate to the precancer the condition of the tooth enamel. At the same time, the beginning of the process of destruction of the emma will be all the more likely than

 closer to the kulu will show the arrow. If the instrument arrow deviates towards negative values,

those. to the left of zero then switching

the device, the arrow again deviates .....

to the right, but this will show that the direction of the electrolytic process has changed, and now the potential of the reference electrode is greater than the potential of the tooth, as a result of which the type of comparison will act as a positive electrode and the tooth will act as a positive electrode.

 negative function. Direction

current of the external circuit will change to the reverse ^1. "" Such a change, recorded by the device, will indicate the development of a process that is _{destroyed — the} tooth enamel.

Thus, the magnitude and sign of the potential difference in the external circuit of the formed element will be a direct indicator of the state on top of the tooth enamel. '

Given that the potential of the electrode. ·

comparison, the value is stable, the potential difference measured in the above method in the external circuit depends only on the Physical and electrochemical state of the two Phases - over the tooth and saliva (myrrh) and can serve as a reliable criterion states .......

At the same time, if you take measurements in the continuation of a certain time, / then the direction of the electrolytic process "in ^: talvaych'y'y'k'y & ¹ element, 'formed by the reference electrode" nd "зуб tooth 0m7’ ’^ united with each other electrolytic Key with the external device closed on the indicating device

goals, will show the direction of development of the process of tooth decay - progress or regress.

The proposed method was diagnosed more than 30 patients, and in the conditions of developing caries 5 patients are volunteers. The test results confirmed the reliability and efficiency of the method. · .....

In 15 individuals with healthy teeth with intact enamel, the potential difference was 60 mV (3 people), 70 mV (5 people), 90 mV (4 people 100 mV (2 people), 165 mV (1 person). Of the 13 a person with visible caries potential difference had the following meanings:

15 10-35 mV (4 people), from (-) 15 to (-) 80 mV (6 people), 50 mV (1 person),

-160 mV (1 person).

Under conditions stimulating the development of caries, all 5 volunteers observed one direction of change in the potential difference towards negative values. These

“changes” were recorded in the initial stage and throughout the experiment, three weeks before the appearance of visible signs of caries — pygmy spots.

With subsequent treatment, the values of the potential difference began to shift

.η in the direction of positive values,

³ that stated the process of enamel remineralization.

The proposed method is very simple and reliable, practical, gives reliable unambiguous

- ⁵³ results, allowing with a high degree of accuracy to diagnose the beginning of the process of destruction of tooth enamel, long before the appearance of visible clinical changes, and thus.

40 much earlier to take the necessary medical measures aimed at stopping this process of destruction.

Claims (1)

Claim method for diagnosing tissue destruction ^{43 of the} teeth by measuring the electrical parameters of the tooth, that is, in order to determine the beginning of the destruction of the tooth enamel, the potential difference is measured using a contact electrode and a reference electrode and the potential value is lower than 83 , 7 + 26.62 mV with respect to the comparison electrode determine the beginning of the destruction of the tooth enamel. 55