FIELD: implant production.
SUBSTANCE: invention relates to options of a method for manufacturing an implant. The method is carried out using composite powder having micro-structured particles, in which composite powder is initially obtained by binding large particles with small particles. Large particles have an average particle diameter in the range from 0.1 mcm to 10 mm and contain at least one polymer in the form of polylactide. Small particles are located on the surface of large particles and/or distributed unevenly inside large particles and include spherically deposited calcium carbonate particles having an average diameter in the range from 0.05 to 50.0 mcm. Subsequently, the implant is obtained by selective laser sintering of a composition containing composite powder. Spherical calcium carbonate particles are obtained by: a. providing a suspension of calcium hydroxide, b. introducing carbon dioxide or a gas mixture containing carbon dioxide into the suspension from step a. and c. separating formed calcium carbonate particles, where from 0.3 to 0.7 wt.% of at least one aminotrialkylene phosphonic acid is additionally added. Composite powder particles have an average particle size d50 in the range from 10 mcm to less than 200 mcm.
EFFECT: ensuring availability of a better implant compared to known ones from the technology level, in particular, obtaining material demonstrating improved properties of laser sintering used for the implant, which has improved fluidity and during laser sintering allows obtaining components with improved surface quality and purity, improved component density, also demonstrating better shrinkage and dimensional stability of the components obtained, better thermal conductivity outside the laser-treated area.
11 cl, 10 ex, 3 tbl, 9 dwg
