METHOD FOR MONITORING HAEMODYNAMICS OF PERIODONTIUM TISSUES Russian patent published in 2020 - IPC A61C13/34 A61B8/06 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to dentistry, and can be used for monitoring haemodynamics of periodontium tissues. Most clear signal is found in the patient in the projection of the interdental septum of alveolar bone 16, 21, 25, 36, 41, 45 of the teeth, and the ultrasonic dopplerograph sensor. This point is marked with a sterile surgical marker and a medical plaster on a paper basis. Above marked point is fixed metal calibration ball with diameter corresponding to diameter of working surface of ultrasonic Doppler sensor. Patient's digital panoramic sonography is carried out, on which image distortions of the image are levelled by means of an image of a metal calibration ball and precise location of sensor corresponding to bone structure of alveolar bone, width of which corresponds to diameter of sensor. Orienting on X-ray data, on gypsum models of patient's jaws compared in articulator, points of position of sensor in projection of 16, 21, 25, 36, 41, 45 teeth are refined with chemical pencil. Dentitions are separated by 3 mm, models of jaws and their mutual position in space are scanned. Double-jawed tray covering the teeth and a marginal gingival to a level of a transient fold is simulated; the tray comprises a horizontal site with denture prints of the upper and lower dentitions. Between teeth 16, 21, 25, 36, 41, 45 on all surfaces, mucous membrane of their inter-rooted alveolar bone to the level of transient fold and the tray, gap of 1.5 mm is simulated. On outer surface of tray in projection of inter-root alveolar partitions simulate tapered holes with diameter of inner surface corresponding to diameter of sensor of instrument for Dopplerography, and the outer radius of the cone hole corresponding to the sensor displacement vector of the Doppler sonography device inside the tray is within range of 25–65 degrees. Digital model of tray is made of dental polymer by additive 3D printing technology, patient is fixed on a patient's denture and ultrasound Doppler sonography is carried out in the desired areas, placing the instrument sensor in cone-shaped holes and moving it to obtain a maximum sound signal of up to 65 degrees vertically.

EFFECT: method provides the ultrasonic dopplerography of the periodontium vessels with the help of an individual navigation device.

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