<?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>S1870-199X2015000400232</article-id>
<article-id pub-id-type="doi">10.1016/j.rodmex.2015.10.004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de agentes de blanqueamiento dental sobre la concentración de fosfato en el esmalte dental por medio de espectroscopia Raman]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of tooth-bleaching agents on phosphate concentration in dental enamel by means of Raman spectroscopy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Koudriavtsev]]></surname>
<given-names><![CDATA[Tatiana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Durán-Sedó]]></surname>
<given-names><![CDATA[Randall]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sáenz-Bonilla]]></surname>
<given-names><![CDATA[Paola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bonilla-Mora]]></surname>
<given-names><![CDATA[Vivian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guevara-Bertsch]]></surname>
<given-names><![CDATA[Milena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez-Corrales]]></surname>
<given-names><![CDATA[Rodrigo Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Sancho]]></surname>
<given-names><![CDATA[Oscar Andrey]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica Laboratorio Nacional de Materiales y Modelos Estructurales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Costa Rica Postgrado de Prostodoncia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica Escuela de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</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>232</fpage>
<lpage>239</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2015000400232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2015000400232&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2015000400232&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[ Objetivo:  Analizar la concentración de la molécula de fosfato &#957;1 en el esmalte dental por medio de espectroscopia Raman luego de la aplicación de blanqueamiento dental a diferentes concentraciones.  Metodología:  Se seleccionaron 30 piezas dentales, libres de caries y pigmentaciones recién extraídas en seres humanos. Se obtuvieron espectros Raman de cada pieza dental previo a la aplicación de agentes blanqueadores. Los especímenes se separaron en tres grupos experimentales según la concentración del blanqueamiento de activación química a utilizar (Day White®, Discus Dental). Grupo y grupo 3: 38% peróxido de carbamida. Se midió la concentración dea molécula de fosfato &#957;1 en el esmalte dental previo a la aplicación y a la segunda y cuarta semana de blanqueamiento por medio de espectroscopia Raman. Se realizó el análisis de varianza ANOVA para mediciones repetitivas (p &#8804; 0.05).  Resultados:  Se observó una reducción en la concentración de la molécula de fosfato &#957;1 durante y al finalizar el proceso de blanqueamiento en los grupos experimentales 2 y 3 (p &#8804; 0.05). El grupo 1 no mostró una reducción estadísticamente significativa.  Conclusiones:  Dentro de las limitaciones de este estudio es posible concluir que el agente blanqueador causó una pérdida de concentración de la molécula fosfato &#957;1. Dicha pérdida fue mayor en los blanqueamientos de mayor concentración.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ Objective:  To analyze concentration of phosphate &#957;1 molecule in dental enamel by means of Raman spectroscopy after applying dental bleaching materials at different concentrations.  Methodology:  30 recently extracted human teeth were selected. Teeth were free of caries and pigmentations. Raman specters were obtained from each tooth before application of bleaching agents. Specimens were divided into three experimental groups according to the chemical activation of the used bleaching material concentration (Day White®, Discus Dental). Group 1: 9.5% hydrogen peroxide, group 2: 14% hydrogen peroxide, and group 3: 38%hydrogen peroxide. With a Raman spectroscope &#957;1 phosphate molecule concentration was measured in the dental enamel before application as well as at second and fourth week of bleaching procedure. For repetitive measurements (p &#8804; 0.05) ANOVA variance analysis was conducted.  Results:  In experimental groups 2 and 3 (p &#8804; 0.05), a decrease in concentration of phosphate &#957;1 molecule was observed during treatment execution and at treatment completion group 1 did not reveal statistically significant reduction.  Conclusions:  Within the limitations inherent to the present study, it was possible to conclude that the bleaching agent caused loss of concentration of the phosphate &#957;1 molecule. This loss was greater in higher concentration bleaching procedures.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Blanqueamiento]]></kwd>
<kwd lng="es"><![CDATA[peróxido de hidrógeno]]></kwd>
<kwd lng="es"><![CDATA[peróxido de carbamida]]></kwd>
<kwd lng="es"><![CDATA[espectroscopia Raman]]></kwd>
<kwd lng="en"><![CDATA[Bleaching]]></kwd>
<kwd lng="en"><![CDATA[hydrogen peroxide]]></kwd>
<kwd lng="en"><![CDATA[carbamide peroxide]]></kwd>
<kwd lng="en"><![CDATA[Raman spectroscopy]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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