<?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>S2306-41022017000400189</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores asociados a fallo en la osteosíntesis de fracturas transtrocantéricas]]></article-title>
<article-title xml:lang="en"><![CDATA[Factor associated in the failure of the ostheosyntesis of transtrocantheric fractures]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Alcalá]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Atri-Levy]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Gómez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa-Olvera]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Médico ABC Servicio de Ortopedia y Traumatología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>31</volume>
<numero>4</numero>
<fpage>189</fpage>
<lpage>195</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2306-41022017000400189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2306-41022017000400189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2306-41022017000400189&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las fracturas transtrocantéricas representan la mitad de las fracturas del fémur proximal. La mayor incidencia es en &gt; 65 años, mujeres y presentan mortalidad al año del 14 al 50%. Los objetivos de tratamiento son: fijación estable, restaurar la movilidad y recuperar la función. Las complicaciones tienen una incidencia de 17%, siendo las más comunes: desplazamiento en varo, no unión y cut out.  Objetivo:  Evaluar la asociación entre falla de la osteosíntesis y los siguientes factores: mala reducción, inestabilidad, índice punta ápice &gt; (TAI) 25 mm, punta ápice modificado al calcar (TAICal) &gt; 20 mm e índice de Parker.  Material y métodos:  Se realizó un estudio de casos y controles anidado en una cohorte de pacientes con fracturas transtrocantéricas. De enero del 2009 a diciembre del 2014, se incluyeron 91 pacientes que cumplieron los criterios de selección. El seguimiento se hizo a 6 meses para valorar complicaciones.  Resultados:  Se incluyeron en el grupo 1 a 27 pacientes que presentaron falla y en el grupo 2 a 64 pacientes. Se obtuvieron en el grupo 1 valores de TAI 13.7 a 45 mm y en el grupo 2 valores de 11 a 31.2 mm. Se encontró que la posición central en lateral e inferior en AP no presentó fallo.  Conclusiones:  Se encontraron 27 pacientes con complicaciones (29%). La estabilidad inicial es un factor determinante, se recomienda fijación con CCM en los casos de fracturas inestables. Se confirmó la validez de un TAI &gt; 25 mm como un predictor de fallo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Pertrochanteric fractures account approximately a half of the proximal femoral fractures. Incidence of these fractures is highest in women, age &gt; 65 years and presents a mortality rate of 14 to 50%. Treatment goals include stable fixation, immediate mobilization and restore activities. Complications after treatment present in 17% and include: nonunion, cut out and varus displacement.  Objective:  Correlation between complications after surgical treatment and presence of instability, inadequate reduction, Tip Apex Index (TAI) &gt; 25 mm, Tip Apex Index to calcar (TAIcal) &gt; 20 mm and parker index.  Material and methods:  A case control study was conducted in patients with pertrochanteric fractures treated between January 2009 and December 2014, 91 patients were included and complications were measured up to 6 months after surgery.  Results:  27 patients were included in group 1, which were the ones who presented complications. Values of TAI measured in this group were 13.7 to 45 mm, and were significantly higher than group 2. Position of the blade/screw central in the lateral view and inferior in the AP view didn´t present complications.  Conclusions:  We found 27 patients with complications in the follow up (29%). Initial reduction and stability is determinant to success. We recommend the use of proximal femoral nail in all unstable fractures. It is confirmed that TAI &gt; 25 mm as a predictor of failure.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[fracturas transtrocantéricas]]></kwd>
<kwd lng="es"><![CDATA[clavo femoral proximal]]></kwd>
<kwd lng="es"><![CDATA[DHS]]></kwd>
<kwd lng="es"><![CDATA[tip ápex index]]></kwd>
<kwd lng="es"><![CDATA[desanclaje]]></kwd>
<kwd lng="en"><![CDATA[Pertrochanteric fractures]]></kwd>
<kwd lng="en"><![CDATA[proximal femoral nail]]></kwd>
<kwd lng="en"><![CDATA[DHS]]></kwd>
<kwd lng="en"><![CDATA[tip apex index]]></kwd>
<kwd lng="en"><![CDATA[cut out]]></kwd>
</kwd-group>
</article-meta>
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