<?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>S1870-199X2010000200091</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Determinación de monómero residual de metacrilato de metilo en 3 diferentes marcas comerciales para base de dentaduras por cromatografía de gases]]></article-title>
<article-title xml:lang="en"><![CDATA[Residual monomer determination in three different brands of denture base resin by means of gas chromatograph]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solórzano Lemus]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Venegas Lancón]]></surname>
<given-names><![CDATA[Rogelio Danovan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno Maldonado]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Morales]]></surname>
<given-names><![CDATA[Salvador]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UNAM Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Instituto de Investigaciones en Materiales Departamento de Reología y Mecánica de Materiales]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2010</year>
</pub-date>
<volume>14</volume>
<numero>2</numero>
<fpage>91</fpage>
<lpage>98</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2010000200091&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2010000200091&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2010000200091&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Entre las técnicas de procesado de las resinas acrílicas para uso dental en México, se ha observado que no se ha determinado comparativamente el contenido de monómero residual. Mientras que el procesado apropiado mantiene el monómero residual en rangos de concentraciones tolerables; para muchos pacientes, el tejido irritado y las reacciones alérgicas se deben a los altos niveles de monómero residual que existen en técnicas alternativas y éstas pueden ser de consentimiento clínico. Se determinó el contenido de monómero residual de resinas acrílicas termopolimerizadas, por medio de cromatografía de gases para tres diferentes marcas comerciales para base de dentaduras. Los materiales evaluados son: SR Ivocap® Plus High Impact (Ivoclar Vivadent), Palaxpress® (Heraeus Kulzer) y ProBase Hot Trial Kit® (Ivoclar Vivadent). Cada espécimen fue procesado bajo las normas y especificaciones del fabricante. Para llevar a cabo este estudio se procesaron 9 muestras, las cuales fueron disueltas en tetrahidrofurano (THF), para ser analizadas en el cromatógrafo de gases. SR-Ivocap es el material que mostró tener la mayor cantidad de monómero residual con un porcentaje de 0.203% y desviación estándar de 0.0697, ProBase Hot obtuvo un porcentaje de 0.068% con una desviación estándar de 0.0180, por otra parte, PalaXpress es el material que cuenta con la menor cantidad de monómero residual (0.047%), con una desviación estándar de 0.0167. Todos los materiales cumplieron con el requisito de la ISO 1567-1999 teniendo un valor inferior al 2.2% de monómero residual, siendo SR Ivocap® Plus High Impact el que reportó los valores más altos de monómero residual (0.203%).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Among the processing techniques of the acrylic resin for dental use in Mexico, it has not been seen the comparative determination of the residual monomer. Whereas the proper processing having the residual monomer in tolerable concentration ranks, for many patients the irritated tissue and the allergic reaction are consequences of the high levels of residual monomer that exist in alternative techniques and this can be of clinical consent. We determined the residual monomer of the heat-polymerized acrylic resin using the gas chromatography for three different registered trademark for denture base. The evaluated materials are: SR Ivocap® Plus High Impact (Ivoclar Vivadent), Palaxpress® (Heraeus Kulzer) y ProBase Hot Trial Kit® (Ivoclar Vivadent). Each specimen was processed with the norms and the specification of the manufacturer. In order to carry out this Study nine samples were processed, which were dissolved in tetrahydrofuran (THF) to be analyzed in the gas chromatograph. Given the results that were obtained, all the materials fulfilled the requirements that ISO 1567-1999 establishes having a lower value than 2.2% of residual monomer, among the materials tested the highest value reported was 0.203%.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Resina acrílica]]></kwd>
<kwd lng="es"><![CDATA[monómero residual]]></kwd>
<kwd lng="es"><![CDATA[cromatografía de gases]]></kwd>
<kwd lng="en"><![CDATA[Acrylic resin]]></kwd>
<kwd lng="en"><![CDATA[residual monomer]]></kwd>
<kwd lng="en"><![CDATA[gas chromatography]]></kwd>
</kwd-group>
</article-meta>
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