METHOD FOR TOOTH BRIDGES PARTS MANUFACTURE Russian patent published in 2017 - IPC A61C5/77 A61C8/00 

FIELD: medicine.

SUBSTANCE: method for dental bridges parts manufacture, namely dental crowns and zirconium-based implants, characterized by hardening of the dental crowns surface, and, on the contrary, imparting hardness less than or equal to the hardness of the alveolar bone to dental implant surfaces, for which the zirconium crown frame is fixed to the axis of the rotary device placed in the vacuum chamber of the electron pulse accelerator, and the dental implant is fixed to a similar second axis of the rotary device located in an unsealed chamber mechanically attached to the coaxially located accelerator vacuum chamber. A vacuum of 10^-2-10^-3 Pa is created in the accelerator vacuum chamber, and the dental crown surface is irradiated by pulsed electron beams accelerated to 15 keV - 20 keV, pulse duration is in the range of 100 μs to 200 μs, at beam current of (100-200) A and pulse repetition rate of (0.2-0.4 ) c^-1 from, and the surface of the zirconium dental implant fixed to the rotating device axis in a non-sealed chamber, which is moistened with water vapour, is irradiated with laser radiation with wavelengths in the range of (914÷1342) nm. For uniform irradiation of the entire treated surface of each dental crown and each implant, they are rotated relative to the electron beam and the laser beam. On both axes of the rotary device ball bearings are pressed, the outer part of which is mechanically fixed through the posts to the walls of chambers where they are located. The dental bridge components are fixed to the mutually opposite ends of the rotary device axes, and permanent magnets are fixed to the other ends of both axes, which serve to create a magnetic relationship. The magnets are supplied to the tight bulkhead of the vacuum chamber, so that their planes are parallel to each other and the magnetic poles are positioned so that the magnetic field between the magnets causes their mutual attraction, while both axes are rotated by means of a magnetic field. Irradiation of the bridge elements ends after the rotating device axes with the dental bridge elements fixed thereon make 2-3 full turns, after which the dental bridge manufactured elements are removed from the chambers and used in the dental bridges of the corresponding patients. The bridge components, in particular the crown treated with an electron beam, have a wear resistance higher by two orders of magnitude, and the implant treated with a laser beam is more efficient in combining with bone tissue.

EFFECT: invention allows to harden the dental crowns surface and, conversely, impart hardness to the dental implants surface that is less than or equal to the alveolar bone hardness.

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