<?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>2007-7890</journal-id>
<journal-title><![CDATA[Dilemas contemporáneos: educación, política y valores]]></journal-title>
<abbrev-journal-title><![CDATA[Dilemas contemp. educ. política valores]]></abbrev-journal-title>
<issn>2007-7890</issn>
<publisher>
<publisher-name><![CDATA[Asesorías y tutorías para la investigación científica en la Educación Puig-Salabarría S.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-78902021000600064</article-id>
<article-id pub-id-type="doi">10.46377/dilemas.v8i.2819</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Maloclusión esquelética clase III con deficiencia maxilar. Mascara de Petit. Relato de casos clínicos]]></article-title>
<article-title xml:lang="en"><![CDATA[Class III skeletal malocclusion with maxillary deficiency. Petit mask. Report of clinical cases]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores Bracho]]></surname>
<given-names><![CDATA[María Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zapata Hidalgo]]></surname>
<given-names><![CDATA[Christian David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz Quiroz]]></surname>
<given-names><![CDATA[Juan Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Regional de Los Andes  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Regional Autónoma de Los Andes  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Regional Autónoma de Los Andes  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>8</volume>
<numero>spe4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-78902021000600064&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-78902021000600064&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-78902021000600064&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las malformaciones esqueléticas tipo Clase III presentan generalmente un perfil cóncavo, retrusión maxilar, y protrusión. La protrusión maxilar en combinación con la expansión rápida de la maxila es un tratamiento muy bien utilizado en pacientes con deficiencia maxilar. El objetivo de este trabajo es demostrar por medio de casos clínicos, el tratamiento de esta anomalía esquelética con el uso de la Máscara de Petit visto en 3 pacientes entre 3 a 8 años que presentaron perfil cóncavo con deficiencia maxilar y mordida cruzada anterior; se coloca un disyuntor tipo Hass modificado con ganchos a nivel de los caninos y el disyuntor se inmoviliza, y se instala la Máscara de Petit; finalmente, los pacientes presentaron la corrección del problema esquelético.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Class III skeletal malformations generally present a concave profile, maxillary retrusion, and protrusion. Maxillary protrusion in combination with rapid expansion of the maxilla is a very well used treatment in patients with maxillary deficiency. The objective of this work is to demonstrate through clinical cases, the treatment of this skeletal anomaly with the use of the Petit Mask seen in 3 patients between 3 to 8 years old who presented concave profile with maxillary deficiency and anterior crossbite; A modified Hass type circuit breaker with hooks is placed at the level of the canines and the circuit breaker is immobilized, and the Petit Mask is installed; finally, the patients presented correction of the skeletal problem.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Máscara de Petit]]></kwd>
<kwd lng="es"><![CDATA[retrusión maxilar]]></kwd>
<kwd lng="es"><![CDATA[protrusión maxilar]]></kwd>
<kwd lng="en"><![CDATA[petit mask]]></kwd>
<kwd lng="en"><![CDATA[maxillary retrusion]]></kwd>
<kwd lng="en"><![CDATA[maxillary protrusion]]></kwd>
</kwd-group>
</article-meta>
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