<?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>1870-199X</journal-id>
<journal-title><![CDATA[Revista odontológica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Odont. Mex]]></abbrev-journal-title>
<issn>1870-199X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Odontología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-199X2022000100070</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Manejo de segundos molares maxilares con dos raíces palatinas: reporte de dos casos]]></article-title>
<article-title xml:lang="en"><![CDATA[Management of maxillary second molars with two palatal roots: report of two cases]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozano González]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salas Orozco]]></surname>
<given-names><![CDATA[Marco Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo Silva]]></surname>
<given-names><![CDATA[Brenda Eréndira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casillas Santana]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Estomatología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Estomatología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Ortodoncia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<fpage>70</fpage>
<lpage>77</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2022000100070&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2022000100070&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2022000100070&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: el objetivo de estos reportes de casos es mostrar la importancia de tener siempre en mente las posibles variaciones anatómicas presentes en los órganos dentales que necesitan tratamiento del conducto radicular. A pesar de los estudios dedicados a informar la prevalencia de estas variaciones anatómicas, las variaciones en el número de raíces palatinas de los molares maxilares rara vez se tienen en cuenta debido a su incidencia extremadamente baja.  Material y métodos: este reporte presenta dos casos clínicos en los que se hay molares maxilares con raíces palatales adicionales. El primer caso fue una mujer de 41 años, sin datos patológicos aparentes, que presentó una cavidad de acceso previa, pero sin signos radiográficos de patología periapical. El sondaje periodontal fue normal. El diagnóstico pulpar fue de terapia pulpar previamente iniciada y el diagnóstico periapical fue de tejidos periapicales sanos. Durante la inspección del piso de la cámara pulpar el conducto palatino se localizó más distalmente de lo normal, y eso hizo sospechar al operador de la presencia de un conducto radicular adicional. Se amplió ligeramente la cavidad de acceso en sentido mesiopalatino, lo cual dio como resultado la localización de un segundo conducto palatino en una raíz palatina extra. El segundo caso fue una mujer de 28 años de edad con antecedentes médicos no contributivos, se presentó con dolor a los cambios térmicos en el segundo molar maxilar derecho. El diagnóstico pulpar fue pulpitis irreversible sintomática y el diagnóstico periapical fue de periodontitis apical sintomática. La cavidad de acceso tenía un diseño cuadrangular y se ubicaron cuatro conductos radiculares, de los cuales un conducto correspondía a un segundo conducto radicular palatino en su propia raíz palatina. Después de la localización de las raíces palatinas extras en estos dos casos, ambos pudieron ser negociados, instrumentados y obturados.  Resultados: durante el tratamiento del conducto radicular se identificaron los tipos I y II del sistema de clasificación de raíces palatinas propuesto por Chritie y colaboradores para los molares maxilares.  Conclusiones: es importante tener en cuenta estas variaciones anatómicas en el número y la forma de las raíces palatinas de molares maxilares. Aunque su prevalencia puede considerarse extremadamente baja, en una práctica endodóntica diaria se pueden encontrar este tipo de casos complejos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: these case reports aim to highlight the importance of always considering the possible anatomical variations present in the dental organs that need root canal treatment. Despite the research dedicated to reporting the prevalence of these anatomical variations, variations in the number of palatine roots of maxillary molars are rarely accounted due to their extremely low incidence.  Material and methods: this report presents two clinical cases in which maxillary molars with additional palatal roots are present. The first case was a 41-year-old woman, with no apparent pathological data, who had a previous access cavity but no radiographic signs of periapical pathology. Periodontal probing was normal. The pulpal diagnosis was previously initiated pulp therapy and the periapical diagnosis was healthy periapical tissues. During the inspection of the pulp chamber floor, the palatine canal was located more distally than normal, making the operator suspicious of the presence of an additional root canal. The access cavity was slightly enlarged in the mesio-palatine direction, which resulted in the location of a second palatal canal in an extra palatal root. The second case was a 28-year-old woman with a noncontributory medical history who presented pain upon thermal changes in the maxillary right second molar. The pulpal diagnosis was symptomatic irreversible pulpitis and the periapical diagnosis was symptomatic apical periodontitis. The access cavity had a quadrangular design and four root canals were located. One canal corresponded to a second palatal root canal in its own palatal root. After locating the extra palatine roots in these two cases, both could be negotiated, instrumented, and obturated.  Results: during root canal treatment, types I and II of the palatal root classification system proposed by Chritie et al. for maxillary molars were identified.  Conclusions: it is important to take into consideration these anatomical variations in the number and shape of the palatal roots of maxillary molars. Although its prevalence may be considered extremely low, such complex cases can be encountered in daily endodontic practice.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[raíces palatinas]]></kwd>
<kwd lng="es"><![CDATA[reporte de caso]]></kwd>
<kwd lng="es"><![CDATA[tratamiento de conductos]]></kwd>
<kwd lng="en"><![CDATA[palatal roots]]></kwd>
<kwd lng="en"><![CDATA[case report]]></kwd>
<kwd lng="en"><![CDATA[root canal treatment]]></kwd>
</kwd-group>
</article-meta>
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