<?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>S1870-199X2009000400217</article-id>
<article-id pub-id-type="doi">10.22201/fo.1870199xp.2009.13.4.15557</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio comparativo in vitro de tres acondicionadores de dentina para evaluar apertura de los túbulos dentinarios en conductos radiculares]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro study: three dentin conditioners to evaluate the opening of dentine tubules in root canals]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Pérez]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Liñán Fernández]]></surname>
<given-names><![CDATA[Maribel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz Villagómez]]></surname>
<given-names><![CDATA[Mónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz Villagómez]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Real López]]></surname>
<given-names><![CDATA[Alicia del]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero-Lara]]></surname>
<given-names><![CDATA[Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,UNAM CFATA ]]></institution>
<addr-line><![CDATA[Juriquilla ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2009</year>
</pub-date>
<volume>13</volume>
<numero>4</numero>
<fpage>217</fpage>
<lpage>223</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2009000400217&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2009000400217&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2009000400217&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Durante la preparación biomecánica del conducto radicular se forma una capa llamada lodo dentinario, se han utilizado varias sustancias químicas para su remoción. En nuestro estudio se utilizaron conductos amplios y rectos de sesenta y cinco dientes extraídos. Se dividieron tres grupos experimentales aleatoriamente de 20 conductos y un grupo control positivo de 5 conductos. El grupo control se irrigó con NaOCl al 5.25% como irrigación final. A los grupos restantes se les irrigó con acondicionador «A» a base de EDTA al 17%; acondicionador «B» EDTA al 17% y cetrimida; acondicionador «C» EDTA al 17% y un surfactante y como irrigación final NaOCl al 5.25% y se observaron en el microscopio electrónico de barrido. Los resultados mostraron que el acondicionador «B» logró eliminar el lodo dentinario casi en su totalidad y en donde se utilizaron los acondicionadores «A» y «C» los resultados mostraron una eliminación parcial del lodo dentinario. Estas diferencias encontradas fueron estadísticamente significativas en el grupo del acondicionador «B», cuando fueron analizadas mediante la prueba de &#967;  2 (P &lt; 0.05). Estos resultados fueron similares en el tercio apical y el tercio medio de los conductos radiculares.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract During the biomechanical preparation of the root canal, a smear layer canals is generated; different chemicals have been used to remove it. In the present study, large and straight root canals were selected of 65 extracted teeth. Three experimental groups with 20 root canals and a positive control group with 5 root canals were randomly divided. The control group was irrigated with 5.25% NaOCl as the final irrigation. The three remaining groups were irrigated with a conditioner «A» with a 17% EDTA base; a conditioner «B» with a 17% EDTA base plus cetrimide and a conditioner «C» with 17% EDTA and a surfactant; after this procedure, 5.25% NaOCl was used as the final irrigation. The samples could be observed with a scanning electronic microscope. Only conditioner «B» eliminated the smear layer successfully. Using conditioners «A» and «C», the results showed a partial elimination of the smear layer. These differences were statistically significant for the group with conditioner «B» agent using the &#967;2 (P &lt; 0.05) test. Similar results were found in the apical and middle thirds of root canals.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Quelante]]></kwd>
<kwd lng="es"><![CDATA[túbulo dentinario]]></kwd>
<kwd lng="es"><![CDATA[lodo dentinario]]></kwd>
<kwd lng="en"><![CDATA[Quelant]]></kwd>
<kwd lng="en"><![CDATA[dentine tubule]]></kwd>
<kwd lng="en"><![CDATA[smear layer]]></kwd>
</kwd-group>
</article-meta>
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