FIELD: medical equipment.
SUBSTANCE: invention relates to a method for manufacturing composite powder with microstructured particles for the manufacture of an implant containing inhibiting calcium carbonate. The composite powder is preliminarily obtained by binding large particles with small ones. The large particles have an average diameter in the range of 0.1 mcm to 10 mm and contain poly-D-, poly-L- and/or poly-D, L-lactic acid, and/or at least one absorbable polyester with the average molecular weight ranging from 500 to 1,000,000 g/mol or at least one polyamide and/or at least one polyurethane. The small particles are located on the surface of the large particles and/or are non-uniformly distributed within the large particles. The small particles contain calcium carbonate and have an average size in the range from 0.01 mcm to 1.0 mm. The implant is formed by selective laser sintering of a composition containing composite powder in which fine particles are obtained by coating calcium carbonate particles with a composition containing (in weight percent in each case based on the total weight) a mixture of at least 0.1 wt% of a conjugated base representing alkali metal or calcium salts with weak acids and at least 0.1 wt.% of one weak acid.
EFFECT: composite powder for the manufacture of an implant, which is more suitable for laser sintering due to increased fluidity, which, when laser sintered, allows to obtain products with improved surface quality and cleanliness, higher density, provides improved shrinkage and size of sintered products as well as higher thermal conductivity of the material for outside the laser-treated area. The invention ensures higher productivity of the implant manufacturing process.
9 cl, 3 tbl, 10 ex, 9 dwg
