<?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>0213-1285</journal-id>
<journal-title><![CDATA[Avances en Odontoestomatología]]></journal-title>
<abbrev-journal-title><![CDATA[Av Odontoestomatol]]></abbrev-journal-title>
<issn>0213-1285</issn>
<publisher>
<publisher-name><![CDATA[Ediciones Avances, S.L.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0213-12852018000200002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Manchas dentales extrínsecas y sus posibles relaciones con los materiales blanqueantes]]></article-title>
<article-title xml:lang="en"><![CDATA[Extrinsic dental stains and their possible relationships with dental materials]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moradas Estrada]]></surname>
<given-names><![CDATA[Marcos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez López]]></surname>
<given-names><![CDATA[Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Oviedo Clínica Universitaria Servicio de Odontología Conservadora]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Oviedo Departamento de Cirugía y Especialidades Médico Quirúrgicas Servicio de Odontología Conservadora y Materiales Odontológicos]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Estomatológico González Tuñón, Oviedo  ]]></institution>
<addr-line><![CDATA[ Oviedo]]></addr-line>
</aff>
<aff id="Af4">
<institution><![CDATA[,Práctica Privada  ]]></institution>
<addr-line><![CDATA[Tapia de Casariego ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>34</volume>
<numero>2</numero>
<fpage>59</fpage>
<lpage>71</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S0213-12852018000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S0213-12852018000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S0213-12852018000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El color del órgano dental viene determinado desde el nacimiento, estando determinado por la tonalidad de la dentina aunada a la transparencia y capacidad de refracción de la luz del esmalte. Las descoloraciones den tales son un cambio en el tono, chroma, valor o en la translucidez del diente, puesto que el tejido adamantino es permeable, poco a poco se va tiñendo a causa de diferentes factores externos como pueden ser pigmentos (cromóforos) contenidos en alimentos o bebidas como los tomates, zanahorias, café, té o infusiones varias, que tienden adherirse a los tejidos orgánicos que ocupan los espacios interprismáticos mediante unión química a sus grupos hidroxilo y amino. Además la unión entre estas sustancias pigmentadas y los iones calcio forma nuevas moléculas que varían en tamaño y efecto óptico. Por otro lado numerosos estudios confirman que el tabaco es otro de los factores que alteran el color natural de los dientes, ya sea en cigarrillo, puros, pipa y aún no existe suficiente evidencia sobre el vapor de tabaco. El mecanismo de acción para la decoloración por el tabaco es similar al de los alimentos, salvo que en estos casos se trata de la nicotina, el grupo de alquitranes y el furufral, los cuales se depositan en la superficie dental o incluso llegan a penetrar en los túbulos dentinarios, siendo muy difícil su eliminación. Este tipo de decoloraciones se denominan extrínsecas. Técnicas de blanqueamiento en diferentes formas de aplicación, tiempo, compuestos y su concentración, han demostrado ser suficientes, aunque sin una suficiente evidencia clara y concisa, como vía de mejora del color del diente y lo que esto acarrea.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY The use of dental implants has become a routine treatment in the clinic. An important prerequisite to ensure proper bone-implant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lastinsthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connecg cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connection to the implant surface and bone. These surfaces can be modified using coatings, different abrasive blasting, or acid treatments, combination of several or all of them.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tooth]]></kwd>
<kwd lng="es"><![CDATA[dyschromia]]></kwd>
<kwd lng="es"><![CDATA[discoloration]]></kwd>
<kwd lng="es"><![CDATA[bleaching]]></kwd>
<kwd lng="es"><![CDATA[carbamine peroxide]]></kwd>
<kwd lng="es"><![CDATA[hydrogen peroxide]]></kwd>
<kwd lng="es"><![CDATA[tobacco]]></kwd>
<kwd lng="es"><![CDATA[nicotine]]></kwd>
<kwd lng="es"><![CDATA[alquitran]]></kwd>
<kwd lng="es"><![CDATA[furfural]]></kwd>
<kwd lng="en"><![CDATA[Tooth]]></kwd>
<kwd lng="en"><![CDATA[dyschromia]]></kwd>
<kwd lng="en"><![CDATA[discoloration]]></kwd>
<kwd lng="en"><![CDATA[bleaching]]></kwd>
<kwd lng="en"><![CDATA[carbamine peroxide]]></kwd>
<kwd lng="en"><![CDATA[hydrogen peroxide]]></kwd>
<kwd lng="en"><![CDATA[tobacco]]></kwd>
<kwd lng="en"><![CDATA[nicotine]]></kwd>
<kwd lng="en"><![CDATA[alquitran]]></kwd>
<kwd lng="en"><![CDATA[furfural]]></kwd>
</kwd-group>
</article-meta>
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