Fabrication of Osteoconductive Са3 – хМ2х(РО4)2 (М = Na, K) Calcium Phosphate Bioceramics by Stereolithographic 3D Printingстатья
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Дата последнего поиска статьи во внешних источниках: 28 сентября 2021 г.
Аннотация:⎯Osteoconductive ceramic implants based on Са3 – хМ2х(РО4)2 (М = Na, K) double phosphatesand having the Kelvin structure, tailored macropore size (in the range 50–750 μm), and a total porosity of 70–80% have been produced by stereolithographic 3D printing. We demonstrate that, to maintain the initial geometry of a model and reach sufficiently high strength characteristics of macroporous ceramics (compressive strength up to 9 MPa and fracture toughness up to 0.7 MPa m1/2), the polymer component should be removed under specially tailored heat treatment conditions. Based on our results on polymer matrix destruction kinetics, we have found heat treatment conditions that ensure a polymer removal rate no higher than 0.1 wt%/min and allow one to avoid implant cracking during the firing process.Keywords: bioceramics, double calcium phosphates, 3D printing, stereolithography, osteoconductivity, Kelvin structure, heat treatment, strength