{"id":41820,"date":"1999-01-01T00:00:00","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/optimization-of-the-properties-of-calcium-phosphate-based-cements\/"},"modified":"1999-01-01T00:00:00","modified_gmt":"1999-01-01T00:00:00","slug":"optimization-of-the-properties-of-calcium-phosphate-based-cements","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/optimization-of-the-properties-of-calcium-phosphate-based-cements\/","title":{"rendered":"Optimization of the properties of calcium phosphate based cements."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ibrahim Khairoun <\/strong><\/h2>\n<p>Un cemento de fosfato de calcio consiste en un componente en forma de polvo, formado por uno o varios fosfatos de calcio, y una fase l\u00edquida, que al ser mezcladas fraguan a temperatura ambiente o fisiol\u00f3gica, dando lugar a un cuerpo s\u00f3lido. adem\u00e1s de la biocompatibilidad y bioactividad de las cer\u00e1micas de fosfatos de calcio, los cementos presentan una serie de ventajas espec\u00edficas, derivadas de su proceso de obtenci\u00f3n, como la moldeabilidad y la capacidad de fraguar \u00abin situ\u00bb, que pueden resolver los problemas de fijaci\u00f3n y adaptaci\u00f3n planteados por las cer\u00e1micas de fosfatos de calcio. Una ventaja adicional es la inyectabilidad.  los primeros cap\u00edtulos de esta tesis doctoral se dedican a la optimizaci\u00f3n de las propiedades de dos cementos basados en fosfatos tric\u00e1lcico alfa (alfa-tcp), que dan como producto de fraguado hidroxiapatita deficiente en calcio, en funci\u00f3n de dos variables de procesamiento: la relaci\u00f3n l\u00edquido\/polvo y la composici\u00f3n de la fase l\u00edquida. Tambi\u00e9n se estudia la cin\u00e9tica de la reacci\u00f3n de fraguado de otro cemento basado en alfa-tcp y carbonato c\u00e1lcico, en t\u00e9rminos de las fases presentes, de la evoluci\u00f3n del porcentaje de reacci\u00f3n, de la resistencia a la compresi\u00f3n y de la microestructura del material.  en la segunda parte de la tesis se estudian tres propiedades espec\u00edficas que tienen una gran importancia en t\u00e9rminos de la aplicaci\u00f3n cl\u00ednica del cemento: la inyectabilidad, la cohesi\u00f3n de la pasta del cemento al ser sumergida en un medio l\u00edquido an\u00e1logo a los fluidos corporales, y formaci\u00f3n macroporosidad de dimensiones adecuadas para favorecer la colonizaci\u00f3n del cemento por parte del hueso. En este sentido cabe mencionar la originalidad de las propuestas en estos tres campos: se propone un m\u00e9todo general para cuantificar la inyectabilidad de un cemento, se muestra la eficacia de la incorporaci\u00f3n de pol\u00edmeros org\u00e1nicos a la fase l\u00edquida del cemento para mejo<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Optimization of the properties of calcium phosphate based cements.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Optimization of the properties of calcium phosphate based cements. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ibrahim Khairoun <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1999<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Josep Antoni Planell Estany<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 manuel Prado pozuelo <\/li>\n<li>salvador Martinez manet (vocal)<\/li>\n<li>pere Caminal magrans (vocal)<\/li>\n<li>enric Caceres (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ibrahim Khairoun Un cemento de fosfato de calcio consiste en un componente en forma de polvo, formado [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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