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Fabrication of osteoconductive Ca3–x M2x (PO4)2 (M = Na, K) calcium phosphate bioceramics by stereolithographic 3D printing

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Abstract

Osteoconductive ceramic implants based on Ca3–x M2x (PO4)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 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.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119991, Russia

    V. I. Putlyaev, P. V. Evdokimov, T. V. Safronova, E. S. Klimashina & N. K. Orlov

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  1. V. I. Putlyaev
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  2. P. V. Evdokimov
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  3. T. V. Safronova
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  4. E. S. Klimashina
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  5. N. K. Orlov
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Correspondence to V. I. Putlyaev.

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Original Russian Text © V.I. Putlyaev, P.V. Evdokimov, T.V. Safronova, E.S. Klimashina, N.K. Orlov, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 5, pp. 534–541.

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Putlyaev, V.I., Evdokimov, P.V., Safronova, T.V. et al. Fabrication of osteoconductive Ca3–x M2x (PO4)2 (M = Na, K) calcium phosphate bioceramics by stereolithographic 3D printing. Inorg Mater 53, 529–535 (2017). https://doi.org/10.1134/S0020168517050168

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  • DOI: https://doi.org/10.1134/S0020168517050168

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