<?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>1659-0775</journal-id>
<journal-title><![CDATA[Odontología Vital]]></journal-title>
<abbrev-journal-title><![CDATA[Odontología Vital]]></abbrev-journal-title>
<issn>1659-0775</issn>
<publisher>
<publisher-name><![CDATA[Universidad Latina de Costa Rica, Facultad de Odontología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-07752018000200049</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Manejo del paciente con apiñamiento severo y mordida cruzada posterior bilateral con expansor maxilar tipo Hyrax]]></article-title>
<article-title xml:lang="en"><![CDATA[Management of the patient with severe crowding and bilateral posterior cross bite with maxillaryexpander type Hyrax]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa Holguín]]></surname>
<given-names><![CDATA[Stefanny]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gurrola Martínez]]></surname>
<given-names><![CDATA[Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casasa Araujo]]></surname>
<given-names><![CDATA[Adán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Estudios Superiores en Ortodoncia CESO  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Facultad de Estudios Superiores Zaragoza UNAM  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Estudios Superiores en Ortodoncia CESO  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<numero>29</numero>
<fpage>49</fpage>
<lpage>58</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-07752018000200049&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-07752018000200049&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-07752018000200049&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las causas de las discrepancias transversales del maxilar superior pueden ser genéticas o ambientales. Se presenta un paciente de 17 años y 7 meses de edad. En su análisis clínico y radiográfico se diagnosticó como: Clase I esquelética, hiperdivergente, clase II molar y canina bilateral, mordida cruzada posterior bilateral, apiñamiento severo superior e inferior, órgano dental 22 cruzado. El tratamiento consistió de la fase de expansión maxilar y alineación, apertura de espacio para el 22, nivelación, detallado y retención. La aparatología utilizada brackets prescripción Roth ,022 x ,028, expansor maxilar tipo Hyrax, bandas en los molares 6&#8217;s superiores, tubos bondeables en 6&#8217;s y 7`s superiores e inferiores, open coil de Niti. La retención a cargo de circunferencial superior e inferior y fijo de 13-23 y 33-43, tiempo de tratamiento activo 1 año y 11 meses.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Causes of transverse discrepancies of the maxilla can be genetic or environmental. We present a patient of 17 years 7 months of age. In his clinical and radiographic analysis he was diagnosed as: Skeletal Class I, hyperdivergent, malocclusion class II bilateral molar and canine, bilateral posterior cross bite, severe upper and lower crowding, crossed dental organ. The treatment consisted of maxillary expansion and alignment, opening of space for 22, leveling, detailing and retention. The appliances used were brackets prescription Roth .022 x .028, maxillary expander type Hyrax, molar bands in the upper molars 6s, tubes in 6&#8217;s and 7&#8217;s upper and lower, open coil of Niti. The retention in charge of upper and lower circumferential retainer and a bonded retainer from 13- 23 and 33-43, time of active treatment 1 year 11 months.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Clase II esquelética]]></kwd>
<kwd lng="es"><![CDATA[apiñamiento severo]]></kwd>
<kwd lng="es"><![CDATA[expansión maxilar]]></kwd>
<kwd lng="en"><![CDATA[Skeletal class II]]></kwd>
<kwd lng="en"><![CDATA[severe crowding]]></kwd>
<kwd lng="en"><![CDATA[maxillary expansion]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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