{"id":18735,"date":"2020-01-23T10:39:55","date_gmt":"2020-01-23T09:39:55","guid":{"rendered":"https:\/\/www.permedica.it\/sistemas-de-innovacion\/vital-e-y-vital-xe\/"},"modified":"2024-12-09T17:45:01","modified_gmt":"2024-12-09T16:45:01","slug":"vital-e-y-vital-xe","status":"publish","type":"page","link":"https:\/\/www.permedica.it\/es\/sistemas-de-innovacion\/vital-e-y-vital-xe\/","title":{"rendered":"VITAL-E Y VITAL-XE"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 hundred-percent-fullwidth non-hundred-percent-height-scrolling fusion-equal-height-columns\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:0px;--awb-padding-right:0px;--awb-padding-bottom:0px;--awb-padding-left:0px;--awb-margin-top:60px;--awb-margin-bottom:0px;--awb-flex-wrap:wrap;\" id=\"pre-intervento\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-first\" style=\"--awb-bg-image:url(&#039;https:\/\/www.permedica.it\/wp-content\/uploads\/2020\/03\/INNOVATION_SYSTEMS_Vital_E_Vital_XE.jpg&#039;);--awb-bg-position:right bottom;--awb-bg-size:cover;--awb-margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy fusion-empty-column-bg-image fusion-column-has-bg-image\" data-bg-url=\"https:\/\/www.permedica.it\/wp-content\/uploads\/2020\/03\/INNOVATION_SYSTEMS_Vital_E_Vital_XE.jpg\"><img decoding=\"async\" class=\"fusion-empty-dims-img-placeholder fusion-no-large-visibility\" aria-label=\"INNOVATION_SYSTEMS_Vital_E_Vital_XE\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271801%27%20height%3D%271500%27%20viewBox%3D%270%200%201801%201500%27%3E%3Crect%20width%3D%271801%27%20height%3D%271500%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\"><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-last\" style=\"--awb-padding-top:5%;--awb-padding-right:11%;--awb-padding-bottom:5%;--awb-padding-left:11%;--awb-bg-size:cover;--awb-margin-bottom:0px;width:48%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-four\" style=\"--awb-text-color:#ed1c24;--awb-margin-top-small:0px;--awb-margin-right-small:0px;--awb-margin-bottom-small:20px;--awb-margin-left-small:0px;\"><h4 class=\"fusion-title-heading title-heading-center\" style=\"margin:0;\">VITAL-E Y <sup>VITAL-XE<\/sup><\/h4><\/div><div class=\"fusion-text fusion-text-1\"><h5>Polietileno reticulado con vitamina E<\/h5>\n<p style=\"text-align: justify; line-height: 2;\">\nV<sup>ITAL-XE\u00ae<\/sup> es un <strong>polietileno (UHMWPE) al que se ha a\u00f1adido un 0,1% en peso de Vitamina E<\/strong> (alfa-tocoferol) <strong>y que<\/strong> se utiliza para fabricar insertos para juntas. La Vitamina E se mezcla con el polvo de polietileno antes de formar las varillas de materia prima.<\/p>\n<p style=\"text-align: justify; line-height: 2;\">\n<sup>El VITAL-XE\u00ae<\/sup> <strong>es un polietileno reticulado<\/strong>, ya que se irradia con rayos beta a una dosis de 60 kGy y luego se esteriliza en \u00f3xido de etileno. <sup>El<\/sup><sup>VITAL-XE\u00ae<\/sup> se utiliza para fabricar <strong>insertos articulares utilizados en la artroplastia total de cadera<\/strong>.<\/p>\n<p style=\"text-align: justify; line-height: 2;\">\n<sup>VITAL-E\u00ae<\/sup> <strong>es la versi\u00f3n no irradiada,<\/strong> es decir, no reticulada, del polietileno con vitamina E a\u00f1adida, esterilizado por \u00f3xido de etileno.<sup>VITAL-E\u00ae<\/sup> se utiliza para fabricar <strong>insertos articulares no reticulados para pr\u00f3tesis de rodilla, as\u00ed como cabezas humerales y glenosferas para pr\u00f3tesis de hombro<\/strong>.<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 hundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:0px;--awb-padding-right:0px;--awb-padding-bottom:0px;--awb-padding-left:0px;--awb-margin-top:0px;--awb-margin-bottom:0px;--awb-flex-wrap:wrap;\" id=\"ospedale\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-first\" style=\"--awb-padding-top:11%;--awb-padding-right:11%;--awb-padding-left:11%;--awb-bg-color:#ffffff;--awb-bg-color-hover:#ffffff;--awb-bg-size:cover;--awb-margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-four\" style=\"--awb-text-color:#ed1c24;--awb-margin-top-small:0px;--awb-margin-right-small:0px;--awb-margin-bottom-small:20px;--awb-margin-left-small:0px;\"><h4 class=\"fusion-title-heading title-heading-center\" style=\"margin:0;\">OXIDACI\u00d3N<\/h4><\/div><div class=\"fusion-text fusion-text-2\"><p style=\"text-align: justify;\">La degradaci\u00f3n del UHMWPE y de los pol\u00edmeros en general es aquel proceso por el que se produce una alteraci\u00f3n de la estructura qu\u00edmica del material con una disminuci\u00f3n del peso molecular.  <strong>La degradaci\u00f3n disminuye las propiedades mec\u00e1nicas del polietileno y, por tanto, provoca un desgaste prematuro.<\/strong><\/p>\n<p style=\"text-align: justify;\">La degradaci\u00f3n de un pol\u00edmero se produce con la ruptura de determinados enlaces qu\u00edmicos y la creaci\u00f3n de nuevos radicales libres cuando, por ejemplo, el material se expone a m\u00e1s energ\u00eda que los enlaces qu\u00edmicos de los que est\u00e1n compuestas las cadenas moleculares del pol\u00edmero. Este proceso en presencia de ox\u00edgeno se denomina degeneraci\u00f3n oxidativa o, m\u00e1s sencillamente, oxidaci\u00f3n.<\/p>\n<p style=\"text-align: justify;\">Una vez desencadenado, el proceso oxidativo es irreversible. La formaci\u00f3n de nuevos radicales que reaccionan con el ox\u00edgeno desencadena la ruptura de otros enlaces qu\u00edmicos que generan otros radicales y as\u00ed sucesivamente, creando una reacci\u00f3n en cadena que se alimenta de s\u00ed misma a una velocidad cada vez mayor. La velocidad de oxidaci\u00f3n depende del n\u00famero de radicales presentes y de la cantidad de ox\u00edgeno que pueda haber en la atm\u00f3sfera durante el procesado y la esterilizaci\u00f3n del polietileno, en el que puede penetrar por difusi\u00f3n durante el almacenamiento del producto o una vez implantado en el paciente.<\/p>\n<p style=\"text-align: justify;\">Los polietilenos utilizados en artroplastia suelen someterse a altas dosis de energ\u00eda en forma de irradiaci\u00f3n gamma o beta para esterilizar o aumentar el grado de reticulaci\u00f3n del polietileno. Dicha irradiaci\u00f3n produce la formaci\u00f3n de radicales libres activos dentro del material. La mayor\u00eda de los radicales libres se recombinan para formar nuevos enlaces cruzados en la fase amorfa del polietileno, la reticulaci\u00f3n. En cambio, los radicales libres formados dentro de la fase cristalina del polietileno permanecen atrapados durante mucho tiempo sin recombinarse en nuevos enlaces. Estos radicales, en presencia de ox\u00edgeno, son responsables de la rotura progresiva de las cadenas polim\u00e9ricas mediante reacciones de oxidaci\u00f3n en cascada y, en consecuencia, son responsables de la reducci\u00f3n de las propiedades mec\u00e1nicas del polietileno.<\/p>\n<p style=\"text-align: justify;\"><strong>La oxidaci\u00f3n provoca la degradaci\u00f3n de la estructura molecular del polietileno y, por tanto, con el tiempo, hace que sus propiedades mec\u00e1nicas y tribol\u00f3gicas decaigan progresivamente.<\/strong><\/p>\n<\/div><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-last\" style=\"--awb-padding-top:11%;--awb-padding-right:11%;--awb-padding-bottom:22%;--awb-padding-left:11%;--awb-bg-color:rgba(0,0,0,0.05);--awb-bg-color-hover:rgba(0,0,0,0.05);--awb-bg-size:cover;--awb-margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"fusion-title title fusion-title-3 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-four\" style=\"--awb-text-color:#ed1c24;--awb-margin-top-small:0px;--awb-margin-right-small:0px;--awb-margin-bottom-small:20px;--awb-margin-left-small:0px;\"><h4 class=\"fusion-title-heading title-heading-center\" style=\"margin:0;\">VITAMINA \u00abE\u00bb COMO ADITIVO ESTABILIZADOR<\/h4><\/div><div class=\"fusion-text fusion-text-3\"><p style=\"text-align: justify;\">La estabilizaci\u00f3n de pol\u00edmeros se basa principalmente en reducir la concentraci\u00f3n de ox\u00edgeno o reducir el n\u00famero de radicales libres o su reactividad para reducir o eliminar te\u00f3ricamente el problema de la oxidaci\u00f3n del polietileno. En el caso del polietileno (UHMWPE), la esterilizaci\u00f3n al vac\u00edo o en atm\u00f3sfera modificada aporta ventajas, pero el ox\u00edgeno sigue presente en el interior del material por difusi\u00f3n durante el proceso de producci\u00f3n; por tanto, es materialmente imposible eliminar por completo el ox\u00edgeno del polietileno.<\/p>\n<p style=\"text-align: justify;\">Existen muchos aditivos en el mercado que pueden limitar la reactividad de los radicales, por desgracia casi todos tienen problemas de biocompatibilidad, que es absolutamente necesaria para que un producto pueda implantarse en el cuerpo humano.<\/p>\n<p style=\"text-align: justify;\"><strong>Un dopante biocompatible estudiado desde hace tiempo en la literatura para la estabilizaci\u00f3n del polietileno m\u00e9dico es la vitamina E<\/strong> (alfa-tocoferol). La vitamina E est\u00e1 presente en muchos vegetales y es un nutriente vitam\u00ednico esencial para el metabolismo humano.<\/p>\n<p style=\"text-align: justify;\"><strong>La estabilizaci\u00f3n del UHMWPE con vitamina E se introdujo como m\u00e9todo alternativo para garantizar la resistencia a la oxidaci\u00f3n sin sacrificar las propiedades mec\u00e1nicas del UHMWPE.<\/strong> %-1% Existen dos m\u00e9todos para introducir concentraciones bajas (0,05 ) de vitamina E en el UHMWPE. La primera consiste en mezclar la vitamina E en forma l\u00edquida con el polvo de UHMWPE antes del proceso de extrusi\u00f3n de la varilla y la irradiaci\u00f3n para la reticulaci\u00f3n. El segundo m\u00e9todo consiste en difundir la vitamina E dentro del UHMWPE ya consolidado y reticulado.<\/p>\n<p style=\"text-align: justify;\"><strong>La adici\u00f3n de concentraciones m\u00ednimas de vitamina E en el polietileno elimina el problema de la oxidaci\u00f3n y, en consecuencia, aumenta su longevidad.<\/strong><\/p>\n<\/div><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 hundred-percent-fullwidth non-hundred-percent-height-scrolling fusion-equal-height-columns\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:0px;--awb-padding-right:0px;--awb-padding-bottom:0px;--awb-padding-left:0px;--awb-margin-top:0px;--awb-margin-bottom:0px;--awb-flex-wrap:wrap;\" id=\"post-intervento\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-first\" style=\"--awb-padding-top:22%;--awb-padding-right:11%;--awb-padding-bottom:22%;--awb-padding-left:11%;--awb-bg-color:rgba(0,0,0,0.05);--awb-bg-color-hover:rgba(0,0,0,0.05);--awb-bg-size:cover;--awb-margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"fusion-title title fusion-title-4 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-four\" style=\"--awb-text-color:#ed1c24;--awb-margin-top-small:0px;--awb-margin-right-small:0px;--awb-margin-bottom-small:20px;--awb-margin-left-small:0px;\"><h4 class=\"fusion-title-heading title-heading-center\" style=\"margin:0;\">BIBLIOGRAF\u00cdA<\/h4><\/div><div class=\"fusion-text fusion-text-4\"><p style=\"text-align: justify; line-height: 2;\">Torre M, Brach Del Prever E, Costa L, Romanini E, Masciocchi M, Manno V.<br \/>\nMateriales innovadores en ortopedia: polietileno reticulado Ann Ig 2011;23:81-90.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-last\" style=\"--awb-bg-image:url(&#039;https:\/\/www.permedica.it\/wp-content\/uploads\/2020\/03\/INNOVATION_SYSTEMS_Vital_E_Vital_XE-2b-1.jpg&#039;);--awb-bg-position:right top;--awb-bg-size:cover;--awb-margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy fusion-empty-column-bg-image fusion-column-has-bg-image\" data-bg-url=\"https:\/\/www.permedica.it\/wp-content\/uploads\/2020\/03\/INNOVATION_SYSTEMS_Vital_E_Vital_XE-2b-1.jpg\"><img decoding=\"async\" class=\"fusion-empty-dims-img-placeholder fusion-no-large-visibility\" aria-label=\"INNOVATION_SYSTEMS_Vital_E_Vital_XE-2b\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271024%27%20height%3D%27930%27%20viewBox%3D%270%200%201024%20930%27%3E%3Crect%20width%3D%271024%27%20height%3D%27930%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\"><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":0,"parent":18012,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-18735","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.3 - 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