Article information
Papers in the literature that discuss HA-coated implants refer to the technical features of this material. Nevertheless, the significance of each of these features for the implant's performance is scarcely known. The results of in vitro and in vivo studies indicate that HA coatings should have low porosity, good coating-to-surface adhesiveness, medium to high crystallinity and high levels of chemical and phase stability. These characteristics should confer the HA calcium phosphate layer enough chemical stability to permit the gradual fixation of the implant as well as favorable bioactive characteristics.
Key words:
hydroxyapatite
fixation
prosthesis
Los artículos publicados sobre implantes recubiertos de hidroxiapatita hacen referencia a las características técnicas de este material. Sin embargo, es poco conocida la importancia de cada una de estas características en el rendimiento del implante. Los resultados de los estudios in vitro e in vivo indican que los recubrimientos de hidroxiapatita deberían tener una porosidad baja, buena adhesión al sustrato, una cristalinidad de media a alta, y una estabilidad química y de fase altas. Estas características deberían conferir a esta capa fosfocálcica la estabilidad química suficiente para dar tiempo a la fijación del implante y unas características bioactivas favorables.
Palabras clave:
hidroxiapatita
fijación
prótesis
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