The method of installing a dental electrode for recording blood flow intact tooth pulp

 

(57) Abstract:

The invention relates to medicine, namely to dentistry. The method consists in the preliminary removal of the mold from the silicone polymer so that it covered the neighboring studied teeth. Then cast in the projection of the examined tooth drill a hole with a diameter less than the diameter of the electrode. Cast set in the oral cavity. In the opening cast of introducing a means for reducing the electrical resistance; and a fixed electrode in the hole dip it all the way. The method can improve the accuracy of registration bloodstream intact pulp of the tooth.

The invention relates to medicine, namely to dentistry

There is a method of installing a dental rheographic electrode, which consists in the fact that the tooth is dried with dry cotton swabs, isolated from saliva cotton cushions, under the tooth electrode put a cotton pad soaked in warm 0,9% isotonic NaCl solution, then tooth electrode mounted on the free end of the wire designs, designed to make efforts to mechanical pressing of the electrode surface to the tooth, put in the fissures of the chewing C is dy diagnosis. - M., 1999, S. 99).

The disadvantage of this method is the low accuracy of the measured characteristics of blood flow due to unstable contact between tooth electrode and hard tissues of the tooth, and also because of the negative impact of changes in humidity and temperature when breathing in electrical contact.

Designed for mechanical pressing of the electrode surface to the tooth, does not provide the stillness of the electrode relative to the hard tissues of the tooth, which leads to instability of the electrical contact, distorting check blood flow.

The objective of the invention is to improve the accuracy of registration of the bloodstream intact pulp of the tooth by providing complete immobility of the electrode at the point of contact with the hard tissues of the tooth and isolation from changes in humidity and temperature.

This is due to the fact that pre-make a mold of silicone material so that it covered the neighboring analyzed teeth; then cast in the projection of the examined tooth drill hole diameter less than the diameter of the electrode; the mold is installed in the oral cavity; hole injected means of reducing electrical Soroti immobility, isolation from moisture, which is constantly present in the oral cavity due to the excretion of saliva and vapors in exhaled air can be achieved by providing a custom fit the crown of the teeth and alveolar bone. The anatomical structure of the mouth so individually, which creates a large difficulty.

For more designs, locking in the oral cavity electrode for registration retinogram and insulating the contact from the environment, used elastic impression weight based on silicone polymers. Silicone masses have a high elasticity, durability, absence of shrinkage and the ability to maintain their properties over a long period of time (several hours), including when in a wet environment.

The method is as follows: pre-make a mold of silicone material so that it covered the neighboring analyzed teeth, cast out, cast in the projection of the examined tooth cut a hole diameter less than the diameter of the electrode, the analyzed tooth dry dry cotton swab or compressed air. The mold set is a, then in the hole immerse the electrode until it stops.

Clinical example

To provide quality orthopedic treatment veneers 11 and 21 teeth in a patient K. was decided to hold anesthesia using intraseptal anesthesia with hemodynamic in the pulp of these teeth. Used the proposed method of installation of a tooth electrode for recording blood flow intact pulp of the tooth.

In the beginning make an imprint of the front teeth of the upper jaw: 12, 11, 21 and 22 teeth. To make an impression block has been correctly received and had a sufficient mechanical strength, select the shape and size of impression spoon, trying on her mouth, the shape and width of the dentition, the topography of the study area. To obtain sufficient mechanical strength of the imprint tracked to the side of the spoon defended from the teeth no less than 3 mm, and the edges of the spoon reached the transition folds, then between the bottom of the spoon and the teeth of the layer of material will be 2-3 mm. To obtain print use rigid metal perforated spoon.

Impression a lot BISICO Putty (the first layer in a two-step technique to make impressions) mix in need of colechester patient and pressed against the teeth. After about 3 minutes (according to instructions) print output from the oral cavity and release the obtained silicone block of impression spoon.

In the projection 11 and 12 teeth on the silicon block do the holes are spherical boron 2 mm diameter, fixed in a straight handpiece mehanicheskogo micro-motor, the rotation speed of boron 30 thousand rpm so that after installation of the impression in the mouth is entered into these holes to the electrodes with a diameter of 1.8 mm was in contact with the wall of the teeth at the level of the equator, where according to N. G.Abolmasova (1967) and B. S. Kliuev (1972) the wall thickness of the tooth cavity least. Holes done in the projection of the teeth from the lingual side, because the vestibular side in future will prepariruetsya.

Compressed air drying print, investigated the teeth and the gums around them, after which the seal is installed in the oral cavity. From a syringe filled with electrode contact gel Alcogel”, squeezing the tip of the needle a small amount of gel and place it in one of the holes, after which it to another input electrode. After that, the electrode connected to the device “CCA-01”, which is produced by STC “MEDS”, and proceed to registration retinogram.

 

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FIELD: medicine.

SUBSTANCE: method involves carrying out urological examination for determining hydrodynamic resistance of ureter calculated from formula Z=8Lμ/(πR4), where Z is the hydrodynamic resistance of ureter, L is the ureter length, R is the ureter radius, μ is the urine viscosity. Angle α at which the ureter enters the urinary bladder is determined from formula cosα = 8l1μ/(ZπR4), where l1 is the perpendicular drawn from the upper edge of the ureter to the its exit projection line, μ is the urine viscosity, Z is the hydrodynamic resistance of ureter, R is the ureter radius. Vesicoureteral reflux recidivation is predicted when the angle of α+90° is less than 120°.

EFFECT: enhanced effectiveness in reducing the number of recidivation cases.

2 dwg, 1 tbl

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