Fabrication of osteoconductive Ca3–xM2x(PO4)2 (M = Na, K) calcium phosphate bioceramics by stereolithographic 3D printing

Osteoconductive ceramic implants based on Ca 3– x M 2 x (PO 4 ) 2 (M = Na, K) double phosphates and 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...

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Bibliographic Details
Published inInorganic materials Vol. 53; no. 5; pp. 529 - 535
Main Authors Putlyaev, V. I., Evdokimov, P. V., Safronova, T. V., Klimashina, E. S., Orlov, N. K.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2017
Subjects
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
bioceramics
osteoconductivity
Kelvin structure
strength
stereolithography
heat treatment
3D printing
double calcium phosphates
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Summary:Osteoconductive ceramic implants based on Ca 3– x M 2 x (PO 4 ) 2 (M = Na, K) double phosphates and 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 m 1/2 ), 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.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168517050168