<?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>S1870-199X2015000400222</article-id>
<article-id pub-id-type="doi">10.1016/j.rodmex.2015.10.002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fotopolimerización de resinas compuestas a través de diversos espesores de tejido dental]]></article-title>
<article-title xml:lang="en"><![CDATA[Light-polymerization of composite resins through different thicknesses of dental tissue]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orozco Barreto]]></surname>
<given-names><![CDATA[Rossany]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Gayosso]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero Ibarra]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UNAM Facultad de Odontología División de Estudios de Postgrado e Investigación]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Facultad de Odontología División de Estudios de Postgrado e Investigación]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>19</volume>
<numero>4</numero>
<fpage>222</fpage>
<lpage>227</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2015000400222&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2015000400222&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2015000400222&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[ Objetivos:  Determinar el espesor de tejido dental a través del cual se presente la fotopolimerización de la resina Prime Dent® con mínimo encogimiento y profundidad de curado adecuada.  Método:  Se obtuvieron 80 láminas de molares de 1, 2, 3 y 4 mm de espesor (20 por grupo). Se midió la contracción y se calculó el encogimiento de la resina polimerizando (Visilux 2, 3 M) a través de cada lámina (60 s, 400 mW/cm2). Se utilizó la técnica de bonded-disc. Se realizaron pruebas de profundidad de curado, midiendo el espesor de resina polimerizada de acuerdo con la especificación No. 27 ADA. Un grupo control sin tejido dental fue preparado para ambas propiedades. Los datos fueron analizados usando ANOVA con prueba de Tukey (p &lt; 0.001).  Resultados:  Profundidad de curado: a medida que aumentó el espesor, ésta disminuyó, existiendo diferencia estadísticamente significativa en todos los grupos. El espesor que mostró menor encogimiento, cumpliendo con una profundidad de curado adecuada (ADA marca como valor mínimo, 1 mm) fue de 3 mm. Encogimiento: a medida que aumentó el espesor, éste disminuyó, no existiendo diferencia estadísticamente significativa entre los grupos de 2 y 3 mm.  Conclusiones:  De acuerdo con los resultados, es posible polimerizar a través de un espesor de 3 mm, por lo que no se recomienda polimerizar a través de un espesor de 4 mm. Es necesario obtener más propiedades mecánicas utilizando diferentes espesores de tejido dental.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ Objectives:  To determine the thickness of dental tissue through which Prime Dent Resin® might exhibit light-polymerization with minimum shrinkage and suitable curing depth.  Method:  80 laminae measuring 1, 2, 3 and 4 mm thickness were obtained from molars (20 laminae per group). Contraction was measured and resin shrinkage was calculated by polymerization (Visilux 2, 3 M) though each lamina (60 s, 400 mW/cm2). Bonded-disk technique was used. Depth of curing tests were undertaken by measuring the thickness of polymerized resin according to ADA's specification number 27. A control group without dental tissue was prepared for both properties. Data were analyzed using ANOVA with Tukey test (p &lt; 0.001).  Results:  Curing depth: curing depth decreased as thickness increased. All groups revealed statistically significant differences. The thickness that exhibited lesser shrinkage nonetheless meeting with suitable curing depth (ADA establishes minimum value of 1 mm) was the 3 mm group. Shrinkage: as thickness increased, shrinkage decreased; no statistically significant difference was reported for groups 2 and 3 mm.  Conclusions:  According to obtained results, it is possible to polymerize through a 3 mm thickness, therefore polymerization is not recommended through a 4 mm depth. It will be necessary to obtain further mechanical properties using different thicknesses of dental tissue.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Contracción de polimerización]]></kwd>
<kwd lng="es"><![CDATA[encogimiento]]></kwd>
<kwd lng="es"><![CDATA[profundidad de curado]]></kwd>
<kwd lng="es"><![CDATA[resina fotocurable]]></kwd>
<kwd lng="es"><![CDATA[espesor de lámina dental]]></kwd>
<kwd lng="es"><![CDATA[polimerización]]></kwd>
<kwd lng="en"><![CDATA[Polymerization contraction]]></kwd>
<kwd lng="en"><![CDATA[shrinkage]]></kwd>
<kwd lng="en"><![CDATA[curing depth]]></kwd>
<kwd lng="en"><![CDATA[light-curing resin]]></kwd>
<kwd lng="en"><![CDATA[thickness of dental lamina]]></kwd>
<kwd lng="en"><![CDATA[polymerization]]></kwd>
</kwd-group>
</article-meta>
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