<?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>S1870-199X2010000300145</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Valoración de la resistencia al desprendimiento de brackets cementados con ionómero de vidrio a esmalte con y sin grabado previo]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of the shear bond strength of bonded braces with glass ionomer to enamel with and without previous acid etching]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bernal Quintana]]></surname>
<given-names><![CDATA[Jessica Leticia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palma Calero]]></surname>
<given-names><![CDATA[Jorge Mario]]></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 FO ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM FO ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,UNAM FO ]]></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>3</numero>
<fpage>145</fpage>
<lpage>150</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2010000300145&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2010000300145&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2010000300145&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Existe en el mercado un producto de ionómero de vidrio modificado con resina (IVMR) propuesto para su uso en la fijación de brackets, con todos los beneficios de los ionómeros de vidrio y con las propiedades mecánicas necesarias para el tratamiento de ortodoncia. El propósito de este estudio fue valorar la resistencia al desprendimiento obtenida con brackets cementados con IVMR, con y sin grabado previo del esmalte, y compararla con la obtenida con un cemento de resina con adhesión autograbante, se utilizará el término de resistencia al desprendimiento para referirse a la resistencia que presenta la unión bracket-resina ante la aplicación de una carga traccional antes del desprendimiento del bracket. Se utilizaron 30 premolares divididos en 3 grupos, a los cuales se les colocó brackets usando IVMR (Fuj Ortho LC) sin grabado y con grabado ácido respectivamente para los dos primeros grupos y utilizando un cemento de resina de autograbado (Transbond Plus SEP) para el tercer grupo. En el primer grupo de IVMR donde no se utilizó grabado ácido se colocó previamente un acondicionador (Self Conditioner non rinse de GC América). La prueba de desprendimiento se realizó en una Máquina Universal de pruebas Instron con una velocidad de carga de 1 mm/min. Después de realizar el análisis estadístico con ANOVA y la prueba Tukey, se determinó que los brackets fijados al esmalte con el cemento de ionómero de vidrio modificado con resina con grabado ácido previo y los fijados con el cemento de resina con primer autograbante, mostraron una mayor resistencia al desprendimiento que la mostrada por brackets cementados con IVMR sin grabado ácido del esmalte.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: A resin modified glass ionomer (RMGI) is proposed to use in fixing brackets, with all the benefits of glass ionomer and the mechanical properties needed for orthodontic treatment. The objective of this study was to evaluate the shear bond strength obtained with IVMR bonded brackets, with and without enamel etching, and also to compare them with self etching primer and a resin cement, the term shear bond strength will be used to talk about the resistance that presents the union bracket-resin to bracket debonded to the application of a traccional load. Thirty premolars were used and divided into 3 groups, brackets were bonded using IVMR (Fuj Ortho LC) with and without acid etching for the first and the second groups respectively and with a self-etching primer (Transbond Plus SEP) for the third group. For the first group a conditioner were used before bonding (Self Conditioner non rinse GC America). Shear bond strength was measured in the universal Instron Machine at a crosshead speed of 1 mm/min. After making statistical analysis with ANOVA and Tukey statistical tests, it was determined that the brackets bonded to etched enamel with a resin modified glass ionomer and with self etching primer and a resin cement showed a higher shear bond strength than the ones shown by brackets cemented with resin modified glass ionomer without an acid etching treatment of enamel.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Resistencia al desprendimiento]]></kwd>
<kwd lng="es"><![CDATA[ionómero de vidrio]]></kwd>
<kwd lng="es"><![CDATA[grabado ácido]]></kwd>
<kwd lng="es"><![CDATA[bracket]]></kwd>
<kwd lng="en"><![CDATA[Shear bond strength]]></kwd>
<kwd lng="en"><![CDATA[glass ionomer]]></kwd>
<kwd lng="en"><![CDATA[acid etching]]></kwd>
<kwd lng="en"><![CDATA[bracket]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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