<?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>0026-1742</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina (México)]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Fac. Med. (Méx.)]]></abbrev-journal-title>
<issn>0026-1742</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Medicina]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0026-17422015000400034</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Corrección de la sonrisa con toxina botulínica en un paciente con parálisis facial]]></article-title>
<article-title xml:lang="en"><![CDATA[Smile enhancement with botulinum toxin in a patient with facial palsy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Afrashtehfar]]></surname>
<given-names><![CDATA[Cyrus Dean Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Afrashtehfar]]></surname>
<given-names><![CDATA[Kelvin Ian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Medicina General y Estética Facial  ]]></institution>
<addr-line><![CDATA[Cuernavaca ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,McGill University Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ Montreal]]></addr-line>
<country>Canada</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,McGill University Faculty of Dentistry ]]></institution>
<addr-line><![CDATA[Montreal Quebec]]></addr-line>
<country>Canada</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<volume>58</volume>
<numero>4</numero>
<fpage>34</fpage>
<lpage>38</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0026-17422015000400034&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0026-17422015000400034&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0026-17422015000400034&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La parálisis facial altera la función muscular desencadenando diversas alteraciones funcionales, psicológicas, emocionales, estéticas y sociales. Existen múltiples causas y tratamientos quirúrgicos y no quirúrgicos para tratar el lado paralizado. Sin embargo, en pacientes con parálisis facial de larga evolución, en quienes el tratamiento quirúrgico ha generado mínimos beneficios o pacientes no candidatos a tratamientos quirúrgicos, el uso de toxina botulínica es una alternativa viable para tratar lado afectado cuando existen secuelas como sincinesias, hipertonía o espasmo hemifacial. En el lado no afectado también se utiliza para ocasionar simetría estética y funcional estática y dinámica. Se presenta un caso clínico de un paciente varón con parálisis facial idiopática derecha tratado con quimiodenervación contralateral selectiva con toxina botulínica y su evolución favorable hacia la funcionalidad y normalización de la simetría facial dinámica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: By altering muscle function, facial palsy causes functional, psychological, emotional, aesthetic and social changes. There are several etiologies and multiple treatments to treat paralyzed side. However, patients with longstanding facial palsy, patients in whom surgical treatment has generated minimal benefits or patients who are not candidates for surgical treatments, the use of botulinum toxin is an adequate alternative to treat affected side when there are sequelae as sinkynesis, hypertony or hemifacial spasm. In the unaffected side is also used to cause static and dynamic aesthetic and functional symmetry. We present a male patient with right idiopathic facial palsy treated with selective contralateral chemodenervation with botulinum toxin. This treatment resulted in the patient&#8217;s favorable evolution towards functionality and normalization of dynamic facial symmetry.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[toxina botulínica]]></kwd>
<kwd lng="es"><![CDATA[botox]]></kwd>
<kwd lng="es"><![CDATA[parálisis facial]]></kwd>
<kwd lng="es"><![CDATA[parálisis de Bell]]></kwd>
<kwd lng="es"><![CDATA[asimetría facial]]></kwd>
<kwd lng="en"><![CDATA[botulinum toxin]]></kwd>
<kwd lng="en"><![CDATA[botox]]></kwd>
<kwd lng="en"><![CDATA[facial palsy]]></kwd>
<kwd lng="en"><![CDATA[Bell&#8217;s palsy]]></kwd>
<kwd lng="en"><![CDATA[facial asymmetry]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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