<?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>S1870-199X2022000400014</article-id>
<article-id pub-id-type="doi">10.22201/fo.1870199xp.2022.26.4.81239</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Localización del conducto Mesiovestibular 2 (MV2) en segundos molares maxilares mediante el análisis de tomografía computarizada de haz cónico (CBCT)]]></article-title>
<article-title xml:lang="en"><![CDATA[Localization of the Second Mesiobuccal (MB2) Root Canal in Maxillary Second Molars by Cone Beam Computed Tomography (CBCT) Analysis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo-Sánchez]]></surname>
<given-names><![CDATA[Gloria Abril]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho-Aparicio]]></surname>
<given-names><![CDATA[Liliana Amparo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Hidalgo]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>4</numero>
<fpage>14</fpage>
<lpage>20</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2022000400014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2022000400014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2022000400014&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  La localización, limpieza, conformación y obturación del sistema de conductos radiculares son claves esenciales para un tratamiento de conductos exitoso. El segundo molar maxilar tiene una compleja anatomía, una de las razones del fracaso en su tratamiento es la falta de localización y tratamiento de alguno de los conductos, como el conducto mesiovestibular (MV2), por lo que es importante conocer su prevalencia.  Objetivo: Determinar el porcentaje de localización del conducto MV2 en segundos molares maxilares mediante el análisis de CBCT, obtenidas de pacientes que fueron atendidos en la Clínica de Endodoncia de la División de Estudios de Posgrado e Investigación de la Facultad de Odontología de la Universidad Nacional Autónoma de México.  Materiales y Métodos:  El estudio fue realizado en una muestra de 129 imágenes tomográficas de segundos molares maxilares de 66 tomografías en formato On Demand. Las tomografías se tomaron con el Aparato NewTom VGI Verona Italy, amperaje de 1-20mA, kilovoltaje de 110kv, tiempo de exposición de 18 segundos, 360° de rotación y medida de vóxel de 0.3mm. Las tomografías fueron analizadas mediante el programa On Demand, se realizaron cortes axiales de cada diente, desde la corona hasta el tercio apical para confirmar la presencia o ausencia del conducto MV2. Los datos obtenidos fueron capturados en una base de datos de Microsoft Excel y posteriormente analizados mediante el programa Stata 13.  Resultados:  Se localizó un total de 69 conductos MV2 del total de 129 dientes analizados, por lo que el porcentaje de localización fue de 53.49%.  Conclusión:  El alto porcentaje de localización del conducto MV2 en segundos molares maxilares utilizando CBCT obtenido en este estudio, demuestra la importancia de la correcta localización, desinfección, conformación y obturación del conducto para lograr un tratamiento satisfactorio.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: The Localization, cleaning, shaping and filling of the root canal system are essential keys to successful root canal treatment. The maxillary second molar has a complex anatomy, one of the reasons for the failure in its treatment is the lack of location and treatment of some of the canals, such as the second mesiobuccal (MB2) root canal, so it is important to know its prevalence.  Objective: To determine the percentage of location of the MB2 root canal in maxillary second molars through the analysis of cone beam computed tomography (CBCT), obtained from patients who were treated at the Endodontics Clinic of the División de Estudios de Posgrado e Investigación de la Facultad de Odontología, de la Universidad Nacional Autónoma de México.  Methods and materials: The study was conducted on a sample of 129 tomographic images of maxillary second molars from 66 tomographies in the OnDemand3DTM software format. The scans were taken with the NewTom VGi EVO device, amperage: 1-20 mA, voltage: 110 kV, exposure time: 18 seconds, 360° rotation and voxel measurement of 0.3mm. The tomography scans were analyzed with the OnDemand3DTM software, and axial sections were made of each tooth, from the crown to the apical third to confirm the presence or absence of the MB2 root canal. The resulting data was captured in a Microsoft Excel spreadsheet and subsequently analysed using Stata 13 software.  Results: A total of 69 MB2 root canals were located out of the total of 129 teeth analyzed, hence the location percentage was 53.49%.  Conclusion: The high percentage of location obtained in this study of the MB2 root canal in maxillary second molars using CBCT, demonstrates the importance of the correct location, disinfection, conformation and obturation of the canal to achieve a successful treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Segundo molar maxilar]]></kwd>
<kwd lng="es"><![CDATA[conducto MV2]]></kwd>
<kwd lng="es"><![CDATA[CBCT]]></kwd>
<kwd lng="en"><![CDATA[Maxillary second molar]]></kwd>
<kwd lng="en"><![CDATA[MB2 root canal]]></kwd>
<kwd lng="en"><![CDATA[CBCT]]></kwd>
</kwd-group>
</article-meta>
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