<?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>S1870-199X2018000100025</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de blanqueamientos de oficina sobre el fosfato en el esmalte dental]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of in-office whitening (bleaching) on phosphate concentration in dental enamel]]></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[Ledezma-Alfaro]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wu-WuSh]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Sancho]]></surname>
<given-names><![CDATA[OA]]></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 Escuela de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>25</fpage>
<lpage>29</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2018000100025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2018000100025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2018000100025&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo:  Analizar los cambios en la molécula de fosfato v1 en el esmalte dental luego de la aplicación de blanqueamiento dental de oficina a diferentes concentraciones y tipo de activación.  Material y métodos:  30 piezas dentales humanas recién extraídas, libres de caries y pigmentaciones fueron distribuidas aleatoriamente en tres grupos experimentales. Los blanqueamientos dentales utilizados en cada grupo experimental fueron Zoom! WhiteSpeed (grupo 1), Pola Office con fotoactivación (grupo 2) y Pola Office sin fotoactivación (grupo 3). Los agentes blanqueadores fueron aplicados de acuerdo con las instrucciones del fabricante, con dos aplicaciones en la primera sesión y una aplicación en la segunda sesión. Se midió la concentración de la molécula de fosfato v1 en el esmalte dental previo al tratamiento y después de cada sesión de blanqueamiento por medio de espectroscopia Raman. Se realizó el análisis de varianza ANOVA para mediciones repetitivas (p &#8804; 0.05) y test de Bonferroni para comparaciones entre sesiones de tratamiento y semana control.  Resultados:  Los tres blanqueamientos de oficina utilizados causaron un incremento en la concentración de la molécula de fosfato v1 durante el proceso de blanqueamiento (p &#8804; 0.05). Pola Office, con ambos tipos de activación, causó un aumento significativo en fosfato durante todo el tratamiento. Zoom! WhiteSpeed mostró un incremento significativo respecto a la semana control, pero no entre la primera y segunda sesión (p &#8804; 0.05).  Conclusiones:  Dentro de las limitaciones de este estudio es posible concluir que los tres blanqueamientos de oficina estudiados provocaron un aumento de la molécula fosfato v1. El tipo de activación no causó una diferencia significativa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To analyze changes in phosphate molecules in dental enamel after application of in-office dental bleach at different concentrations and type of activation.  Material and methods:  30 recently extracted, human teeth free of caries and pigmentations were randomly distributed into three experimental groups. Tooth whitening materials used in each experimental group were Zoom! WhiteSpeed (group 1), Pola Office with light-activation (group 2) and Pola Office without light activation (group 3). Bleaching agents were applied according to manufacturer&#8217;s instructions; two applications on the first sessions and one application in the second session. With Raman spectroscopy phosphate v1 molecule concentration was measured in tooth enamel before treatment and after each bleaching session. ANOVA variance analysis was used for repetitive measurements (p &#8804; 0.05); Bonferroni post hoc test was used for comparisons between treatment sessions and control week.  Results:  All three in-office bleachers elicited increase in phosphate v1 molecule concentration during bleaching process (p &#8804; 0.05), Pola Office, with both types of activation caused significant phosphate increase during the whole treatment. Zoom! WhiteSpeed showed significant increment with respect to control week, but did not show increase between first and second session (p &#8804; 0.05).  Conclusions:  Within the scope of this study&#8217;s limitations, it is possible to conclude that all three studied in-office bleaching agents increased phosphate v1 molecule. Activation type did not elicit significant difference.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Blanqueamiento de oficina]]></kwd>
<kwd lng="es"><![CDATA[peróxido de hidrógeno]]></kwd>
<kwd lng="es"><![CDATA[espectroscopia Raman]]></kwd>
<kwd lng="es"><![CDATA[fosfato]]></kwd>
<kwd lng="es"><![CDATA[esmalte dental]]></kwd>
<kwd lng="en"><![CDATA[In-office bleaching]]></kwd>
<kwd lng="en"><![CDATA[hydrogen peroxide]]></kwd>
<kwd lng="en"><![CDATA[Raman spectroscopy]]></kwd>
<kwd lng="en"><![CDATA[phosphate]]></kwd>
<kwd lng="en"><![CDATA[dental enamel]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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