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Colored powders for bioceramics based on calcium phosphatesтезисы доклада
- Авторы: Gilyana Kazakova, Tatyana Safronova, Valery Putlayev, Pavel Evdokimov
- Сборник: ECerS2017:15th Conference & Exhibition of the European Ceramic Society, July 9–13, 2017, Budapest, Hungary, book of abstracts
- Тезисы
- Год издания: 2017
- Место издания: AKCongress Akadémiai Kiadó, Budapest, Венгрия
- Первая страница: 551
- Последняя страница: 551
- Аннотация: Composite materials containing phases of tricalcium phosphate Ca3(PO4)2 (TCP) and/or hydroxyapatite Ca10(PO4)6(OH)2 (HA) have been approved and authorized for clinical use in the most countries of the world. The main advantages of these materials include good biocompatibility and osteoconductivity in vivo. Chemical composition of ceramic materials based on HA and TCP are very similar to those of bones of animals and humans. These materials are not toxic and they do not cause allergic reactions. However, they have the following disadvantages: low speed of bioresorption, weak stimulatory effect on the growth of new bone tissue (osteoinduction), low fracture toughness and low fatigue strength under physiological conditions. The selection of various calcium salts as initial ingredients allowed us to control a predetermined pH level in the reaction zone. Nanosized calcium phosphate powder synthesized from 0.5 M solutions of calcium acetates/saccarate and ammonium hydrophosphate contained a significant amount (64%) of sucrose as the reaction by-product. A microporous ceramic with a pore size from 1 to 6 μm and a relative density of 56% was obtained on the basis of calcium phosphate powder synthesized from aqueous solutions of monocalcium saccharate and ammonium hydrophosphate. A significant linear shrinkage of powder workpieces after calcination (up to 40% after calcination at 1200 °C) indicates a high activity of the synthesized powder with respect to sintering. The phase composition of the ceramic represented by β-TCP and HAP allows one to consider the synthesized powder to be acceptable for the manufacture of bone implants. Ceramic composites containing these phases are widely used as materials for bone implants.
- Добавил в систему: Сафронова Татьяна Викторовна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | ecers2017-abstract-book_Kazakova_551.pdf | ecers2017-abstract-book_Kazakova_551.pdf | 251,3 КБ | 17 июля 2017 [safronova] |