<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2306-4102</journal-id>
<journal-title><![CDATA[Acta ortopédica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta ortop. mex]]></abbrev-journal-title>
<issn>2306-4102</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Ortopedia y Traumatología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2306-41022021000200125</article-id>
<article-id pub-id-type="doi">10.35366/101854</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis biomecánico de la ligamentoplastía interespinosa con fibra de poliéster posterior a discectomía]]></article-title>
<article-title xml:lang="en"><![CDATA[Biomechanical analysis of interespinous ligamentoplasty with polyester fiber after discectomy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-López]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hermida-Ochoa]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hermida-Ochoa]]></surname>
<given-names><![CDATA[EH]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuevas-Andrade]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benavides-Rodríguez]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad La Salle México Hospital de Ortopedia para Niños «Dr. Germán Díaz Lombardo» Facultad Mexicana de Medicina,]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital de Ortopedia para Niños «Dr. Germán Díaz Lombardo» Centro de Investigación y Laboratorio de Biomecánica (CILAB) ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital de Ortopedia para Niños «Dr. Germán Díaz Lombardo»  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Politécnico Nacional ESIME Zacatenco ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital de Ortopedia para Niños «Dr. Germán Díaz Lombardo»  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>125</fpage>
<lpage>131</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2306-41022021000200125&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2306-41022021000200125&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2306-41022021000200125&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  Existen diferentes patologías de la columna lumbar que condicionan una inestabilidad biomecánica y clínica para su tratamiento, se han efectuado diversas técnicas de estabilización que tratan de preservar el movimiento y la transmisión de carga del segmento afecto como la ligamentoplastía interespinosa con fibra Dallos®.  Objetivo:  Mostrar las variaciones biomecánicas de segmento funcional de columna lumbar de porcino, antes y después de realizar la discetomía y ligamentoplastía con fibra Dallos®.  Material y métodos:  El segmento lumbar se montó en un simulador multiaxial servo-hidráulico. Se simularon rangos de movilidad de flexión, extensión, flexiones laterales y rotaciones axiales en tres condiciones: 1) segmento natural; 2) segmento discectomizado; y 3) segmento disectomizado más ligamentoplastía con fibra Dallos®. Los rangos de movilidad se realizan hasta un torque de 7.5 N-m. La data de los torques y rangos de movilidad se recolectó en el programa del simulador y se graficaron los resultados de los cambios biomecánicos entre las tres condiciones descritas.  Resultados:  Se demostró que la biomecánica lumbar es afectada después de la discectomía principalmente en la flexión y la extensión. En los movimientos de flexión y rotación axial izquierdas, se comprobó una alteración del torque y los rangos de movilidad.  Conclusiones:  La ligamentoplastía recupera parte de la estabilidad perdida postdiscectomía, preservando parte de la altura discal sin llegar a igualar los movimientos como en el segmento natural. Posterior a la discectomía, la distribución de la fuerza sugiere que la inestabilidad residual con ligamento plastía puede representar sobrecarga facetaria.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction:  There are different pathologies of the lumbar spine that condition a biomechanical and clinical instability for its treatment, various stabilization techniques have been carried out that try to preserve the movement and the transmission of load of the affected segment such as the interspinatus ligamentplasty with Dallos® fiber.  Objective:  To show the biomechanical variations of functional segment of lumbar spine of pigs, before and after performing the discectomy and ligamentoplasty with Dallos® fiber.  Material and methods:  The lumbar segment was mounted in a servo-hydraulic multiaxial simulator. Mobility ranges of flexion, extension, lateral flexion and axial rotations were simulated under three conditions: 1. Natural segment, 2. Discectomy segment, and 3. Disectomized segment plus ligamentoplasty with Dallos® fiber. The mobility ranges are made up to a torque of 7.5 N-m The data of the torques and mobility ranges was collected in the simulator program and the results of the biomechanical changes between the three conditions described were plotted.  Results:  It was shown that lumbar biomechanics is affected after discectomy mainly in flexion and extension. In the left axial bending and rotation movements, an alteration of torque and mobility ranges was found.  Conclusions:  The ligamentoplasty recovers part of the stability lost after discectomy preserving part of the disc height without reaching to equalize the movements as in the natural segment. After discectomy the distribution of force suggests that residual instability with ligament plasty may represent facet overload.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Columna lumbar]]></kwd>
<kwd lng="es"><![CDATA[inestabilidad]]></kwd>
<kwd lng="es"><![CDATA[Dallos]]></kwd>
<kwd lng="es"><![CDATA[ligamentoplastía]]></kwd>
<kwd lng="es"><![CDATA[discectomía]]></kwd>
<kwd lng="en"><![CDATA[Lumbar spine]]></kwd>
<kwd lng="en"><![CDATA[instability]]></kwd>
<kwd lng="en"><![CDATA[Dallos]]></kwd>
<kwd lng="en"><![CDATA[ligamentoplasty]]></kwd>
<kwd lng="en"><![CDATA[discectomy]]></kwd>
</kwd-group>
</article-meta>
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