ИСТИНА

Porous resorbable ceramic materials based on calcium phosphates is necessary to treat the bone defects of critical size using advanced methods of regenerative medicine. Porous materials with a given geometry of the pore space were made using three-dimensional stereolithographic printing from a suspension of black colored inorganic (calcium phosphate) fine powder in a mixture of monomers, polymerization of which occurs under the influence of ultraviolet radiation. Powders were preparing from calcium salts of carboxylic acids and ammonium hydrophosphate followed by thermal treatment at 500-900oC. Prepared macroporous material before firing was a composite of "polymer/black colored calcium phosphate powder " and after firing it was macroporous calcium phosphate ceramic material. The length of the sample before firing was 11.6 mm, and after firing – 6.1 mm.The use of the black-colored calcium phosphate powders gives an opportunity to enhance the lateral resolution of stereo-lithographic printing.RFBR supported this study under Grant No. 18-29-11079.