SU1082440A1 - Method of diagnosis of pulpitis - Google Patents

Description

The invention relates to medicine, namely to dentistry, and may find application in the diagnosis and investigation of pulpitis. A known method for the diagnosis of pulpitis using ultrasonic vibrations ij. The purpose of the invention is the diagnosis of pulp under the crown. This goal is achieved by the fact that, according to the method of diagnosing pulpitis using ultrasound vibrations, ultrasound vibrations are performed at a radiation intensity of -10 W / cm, a frequency of 0.6-10 MHz for 5-70 s, and pulp viability is diagnosed by decreasing amplitude . When diagnosing pulpitis, one can “use both the echo-pulse method and the method of through sounding of the tooth. In the first case, obtaining information about the condition of the tooth pulp takes more time and takes up to 70 s, in the second - no more than 5 s, since the assessment of the viability of the pulp can be carried out using a simple indicator on the basis of the yes-no principle. In the case of diagnostics using the through sound method, two sensors are fixed on opposite side of the tooth on the opposite side of the tooth in the projection of the pulp. One of the sensors is radiating, and the other is perceiving acoustic oscillations. If the tooth is alive, then the ultrasound signal, unimpeded, reaches the sensing sensor, only slightly but the damping in the hard tissues of the tooth. In the case of a dead tooth, there is a significant weakening of the signal passing through the pulp. This weakening is due either to the strong reflection of the ultrasound beam from the bubbles in the pulp during gangrenous pulpitis, or to the substantial absorption of the beam energy in the filling material in the diagnosis of a depulped tooth. The choice of the intensity and frequency of the ultrasound exposure is determined by the acoustical properties of various teeth, the characteristics of age-related changes in the tooth tissues and the biologically acceptable limit of the ultrasound intensity. 1 0. Intensity above 10 Bt / cm is not recommended for diagnostic purposes. On the other hand, the use of intensity below W / cm of the water leads to a significant signal absorption even by a healthy tooth, especially in the case of molar diagnostics. The choice of the frequency interval of the ultrasonic effect is determined by age-related changes in the tooth tissues. With the age of a person, the hard tissues of his teeth become more dense (due to the sclerotization of the dentical tubules) and the attenuation of ultrasound in them is less. This allows a higher frequency to be used for diagnosis. As the frequency increases, the ultrasound of the ultrasound beam increases, which makes it possible to more accurately diagnose a smaller volume pulp chamber. The maximum frequency is ultrasound. The signal at which it is possible to pass through the tooth is 10 MHz. A lower frequency of up to 0.6 MHz is convenient for diagnosing young teeth, where the pulp occupies a substantial volume. However, a further decrease in the frequency leads to errors in diagnosis due to the small size of the near zone and the divergence of the beam. Example. A method for diagnosing the viability of the dental pulp under the crown was performed by the method of through sounding. The receiving and transmitting sensors were made of piezoelectric ceramics such as PZT-19 in the form of tablets with a diameter of 3 mm and a thickness of 0.5 mm. Diagnostics was performed at a frequency of 5 mHz using a D4K-66PM device giving an intensity of 10 W / cm. The sensors were fixed on opposite sides of the lateral surface of the tooth under investigation in the projection of the pulp with the help of special forceps. When applying sensors, their working surfaces were arranged parallel to each other and wetted with a layer of contact liquid. After applying the sensors, an impulse corresponding to the signal that passed through the tooth appeared on the device screen. Its amplitude was 1 division on the vertical scale of the screen. Transferring the sensors to the tooth for the pair to the examined person allowed us to obtain a signal amplitude of 6 divisions, this was the difference in attenuation of –12 dB. Statistic3 10824404

The cue material and verification of the resultant pulp viability turned out to be

ultrasound diagnosis of doubtful or erroneous,

the results of treatment and other methods of using the diagnostics offered by the methods allowed the installation to allow objective information without painful and harmless availability of the depulpi-5 crown

tooth. In this case, the time of pulp vitality, including

m diagnosis was 40 seconds. and for the teeth that are under

Studies conducted on 102 artificial crowns. It is in its teeth, of which 42 were located in the sub-sequence, will reduce the number of erroneous artificial crowns, confirm-10 diagnoses, the time of the examination and increase the high reliability of diagnoses the quality of the dental skimmer. Of the 42 cases in only two people.

Claims (1)

PULPIT DIAGNOSTIC METHOD using ultrasonic vibrations, characterized in that, in order to diagnose pulp under the crown, ultrasonic vibrations are carried out at a radiation intensity of 10 ~ ^ -10 ~ 2 g _T / _{CM f} at a frequency of 0.6-10 MHz for 5- 70 s and by decreasing the amplitude, pulp viability is diagnosed. 1 ’1082440.