| Autor: |
Abbaoui, E., Essaddek, A., Mejdoubi, E., Elansari, L. L., Elgadi, M., Hammouti, B., Abbaoui, E., Essaddek, A., Mejdoubi, E., Elansari, L. L., Elgadi, M., Hammouti, B. |
| Zdroj: |
Journal de Physique IV - Proceedings; March 2005, Vol. 123 Issue: 1 p229-232, 4p |
| Abstrakt: |
The hydroxyapatite (Ca10(PO$_{4})_{6}$(OH)$_{2})$has a structure and a chemical composition very close to those of the mineral phase of calcified tissues. It is thus used for a long time in orthopedic and odontological surgery. In the past few years, cements which evolve toward the hydroxyapatite have been the object of several studies. This communication reports the synthesis and the study of new phosphocalcic cement, which evolves after hardening, towards a hydroxyapatite. The cement is composed of tricalcium phosphate a type (α-Ca3(PO$_{4})_{2})$, calcium hydroxide (Ca(OH)$_{2})$and phosphoric acid (H3PO$_{4})$. The sintering of hardened cement, leads to ceramics having a structure and chemical composition close to those of the bone's mineral phase. The trisodium phosphate is used as melting agent to increase the hardness of ceramics and to decrease the sintering temperature, without affecting the physicochemical properties of ceramics. |
| Databáze: |
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