Resorbable biomaterials based on carbonated hydroxyapatite

Klimashina, E.S.; Filippov, Y.Y.; Putlayev, V.I.; Tretyakov, Y.D.

Авторы: Klimashina E.S., Filippov Ya Yu, Putlayev V.I., Tretyakov Yu D.
Сборник: XIX Mendeleev congress on general and applied chemistry. 25-30 September 2011, Volgograd, Russia. Abstract book in 4 volumes
Том: 1
Тезисы
Год издания: 2011
Место издания: Volgograd
Первая страница: 306
Последняя страница: 306
Аннотация: Choosing CHA as a material for bone implants immediately requires special technique for its consolidation into bulk bodies.2 Conventional method of solid state sintering cannot be applied for the case of CHA since it starts to decompose at temperatures higher than 700 °C into pure (stoichiometric) HA and CaO with CO2 release. This problem can be overcome by selection of an appropriate binder with low melting point. Thereby, the process of consolidation can be described in terms of liquidstate sintering running essentially in liquid-state environment. Quasi-binary section Na4CaP6O18 – Na2CaP2O7 of CaO – Na2O – P2O5 ternary system looks very attractive as one can find there eutectics (54 wt. % Na4CaP6O18 and 46 wt. % Na2CaP2O7) melted at 473 °C. Thus, we report on the possibility to consolidate CHA powder without noticeable changing of its carbonate content using low-melting Na-Ca phosphate glass with the above composition and as an alternative biocompatible, biodegradable polymer poly-3-oxybutyrate as a binder.
Добавил в систему: Климашина Елена Сергеевна

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