METHOD FOR DENTAL OSTEOINTEGRABLE IMPLANT MANUFACTURE Russian patent published in 2017 - IPC A61C8/00 A61C13/08 

FIELD: medicine.

SUBSTANCE: method for manufacture of a dental osteointegrable implant containing the extraosteal and intraosseous parts, including macro retention elements provision on the outer surface in the form of a fixed thread with a constant profile along the entire length of the intraosseous part, and the micro retentions are made in the form of a surface layer of 10-200 micron with a developed microrelief, close to bone microarchitectonics, which is obtained by irradiating the implant surface under vacuum of (0.1÷1) Pa with a powerful electron beam of microsecond duration. The implant base is made of zirconium, the implant is placed in the accelerator chamber, a vacuum of about 10^-2 Pa is created, after which the chamber is filled with steam and when the water vapour pressure of (0.1÷1) Pa is obtained, the implant irradiated with an electron beam with energy density in the range of (60÷100) J/cm², pulse frequency in the range of 8-10 pulses per second, and diameter of the electron beam in the region of implant irradiation in the range of L≤D≤1.2L, where L is the longitudinal dimension of implant intraosseous part. During irradiation, implant surface is treated with water vapour and rotated under an electron beam at a speed of (0.8-1) rps, irradiation is terminated after the implant completes 5-10 full revolutions. The invention allows to obtain a homogeneous layer of zirconium hydroxide, with numerous pores and microcracks, the hardness of the resulting layer being lower than the alveolar bone hardness. The claimed method can be used not only for dental implants, but also for any other zirconium implants.

EFFECT: zirconium implants obtained by the claimed method have a higher efficiency of bonding to bone tissue than implants obtained by the prototype method.

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