<?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>1665-1146</journal-id>
<journal-title><![CDATA[Boletín médico del Hospital Infantil de México]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Med. Hosp. Infant. Mex.]]></abbrev-journal-title>
<issn>1665-1146</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud, Hospital Infantil de México Federico Gómez]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-11462018000200113</article-id>
<article-id pub-id-type="doi">10.24875/bmhim.m18000016</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prevalencia de placa dentobacteriana y caries dental en el primer molar permanente en una población escolar del sur de la Ciudad de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Prevalence of plaque and dental decay in the first permanent molar in a school population of south Mexico City]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Taboada-Aranza]]></surname>
<given-names><![CDATA[Olga]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Nieto]]></surname>
<given-names><![CDATA[Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México FES Zaragoza ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Práctica privada  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>75</volume>
<numero>2</numero>
<fpage>113</fpage>
<lpage>118</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462018000200113&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462018000200113&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462018000200113&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  El primer molar permanente (PMP) es susceptible de caries a partir de su erupción por su anatomía y porque ha estado expuesto antes que otros dientes.  Métodos:  Estudio observacional, prolectivo, transversal, comparativo, en 194 escolares con una media de edad de 9.9 ± 1.8 años. La valoración de la placa dentobacteriana (PDB) se realizó con el índice de O&#8217;Leary, y la experiencia de caries con los índices CPOS (suma de superficies dentales cariadas, perdidas/extraídas y obturadas) y CPOD (suma de dientes cariados, perdidos/extraídos y obturados).  Resultados:  La prevalencia de PDB en el PMP fue del 99.4%, y la de caries, del 57.2%. El valor del CPOD fue de 1.4 ± 1.4. La experiencia de caries por superficie dental en los niños de 7.10 años de edad fue de 2.2 ± 2.3 y son 7.9 veces más susceptibles a desarrollar lesiones (razón de momios: 8.9; intervalo de confianza al 95%: 4.1-19.5; p &lt; 0.0001) que los menores de esa edad. Se detectó asociación con la variable edad y los valores de los índices de experiencia de caries; aun cuando estas son débiles en el caso del CPOS (r = 0.439), el modelo permitió explicar el 19% de la asociación, y el 22% para el CPOD (r = 0.464).  Conclusiones:  La caries dental se desarrolla rápidamente en los PMP. En general, no se le da la importancia debida porque se desconoce que se presenta en un diente permanente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  The first permanent molar is susceptible to acquire tooth decay since its eruption, due to its anatomy and because it has been exposed before other teeth.  Method:  An observational, prolective, transversal and comparative study in 194 students, with an average age of 9.9 ± 1.8 years. The evaluation of the dentobacterial plate (DBP) was analyzed using the O&#8217;Leary index and the tooth decay experience with the DMFS (sum of decayed, missing, extracted and filling dental surfaces) and DMFT (sum of decayed, missing, extracted and filling per tooth) indexes.  Results:  The prevalence of DBP in the first permanent molar was of 99.4% and tooth decay of 57.2%. The value of DMFT was 1.4 ± 1.4. The tooth decay experience was higher in children from 7.10 years old with a value of 2.2 ± 2.3, who are 7.9 times more likely to develop lesions than younger children (odds ratio: 8.9; 95% confidence interval: 4.1-19.5; p &lt; 0.0001). We found an association between age and the values of the tooth decay experience indexes; even though these were weak in the case of DMF (r = 0.439), the model allowed to explain 19% of the association, and 22% for DMFT (r = 0.464).  Conclusions:  Tooth decay develops rapidly in the first permanent molars; however, it does not receive the necessary care because it is usually unknown that it is a permanent tooth.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Caries dental]]></kwd>
<kwd lng="es"><![CDATA[Placa dentobacteriana]]></kwd>
<kwd lng="es"><![CDATA[Primer molar permanente]]></kwd>
<kwd lng="en"><![CDATA[Tooth decay]]></kwd>
<kwd lng="en"><![CDATA[Dentobacterial plaque]]></kwd>
<kwd lng="en"><![CDATA[Permanent first molar]]></kwd>
</kwd-group>
</article-meta>
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</ref-list>
</back>
</article>
