<?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>0034-7507</journal-id>
<journal-title><![CDATA[Revista Cubana de Estomatología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Estomatol]]></abbrev-journal-title>
<issn>0034-7507</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-75072021000200009</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Resina Filtek Z250 XT precalentada como agente cementante de restauraciones indirectas]]></article-title>
<article-title xml:lang="en"><![CDATA[Preheated Filtek Z250 XT resin as a luting agent in indirect restorations]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ugarte-Mamani]]></surname>
<given-names><![CDATA[Freyshi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Tito]]></surname>
<given-names><![CDATA[Marco Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Práctica privada  ]]></institution>
<addr-line><![CDATA[Tacna ]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Privada de Tacna Facultad de Ciencias de la Salud Escuela Profesional de Odontología]]></institution>
<addr-line><![CDATA[Tacna ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>58</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0034-75072021000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0034-75072021000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0034-75072021000200009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Las restauraciones indirectas de resina son ampliamente empleadas para realizar tratamientos estéticos en dientes posteriores. Recientemente se ha propuesto el uso de resinas precalentadas como agentes de unión.  Objetivo:  Evaluar la resistencia a la tracción de restauraciones indirectas cementadas con una resina precalentada comparándola con un cemento de resina autoadhesivo y un cemento resinoso.  Métodos:  Las preparaciones dentarias se realizaron en 45 premolares con piedras diamantadas calibradas. Las muestras se dividieron aleatoriamente en tres conjuntos (n = 15) según los grupos experimentales: grupo 1 (resina precalentada), grupo 2 (resina autoadhesiva) y grupo 3 (cemento de resinoso adhesivo). Las muestras fueron incluidas en acrílico autopolimerizable. Se realizaron restauraciones indirectas para cada muestra, las superficies internas fueron microarenadas y se aplicó silano antes de la cementación con los agentes de unión. La resistencia a la tracción se realizó utilizando una máquina universal de ensayos con una velocidad de cruceta de 5 mm/min. El análisis estadístico se llevó a cabo con ANOVA de un factor y la prueba post hoc de Tukey. Se adoptó un nivel de significancia de p &lt; 0,05.  Resultados:  La resina Filtek Z250 XT precalentada a 60 °C durante 15 minutos tuvo una fuerza de resistencia a la tracción de 5,775 MPa, similar a RelyX Ultimate con 5,442 MPa (p &gt; 0,05), ambos grupos poseen una fuerza de resistencia a la tracción significativamente mayor que RelyX U200 (3,430 MPa).  Conclusiones:  La resina precalentada (Filtek, Z250 XT) y el cemento resinoso (RelyX Ultimate) muestran las mismas propiedades de resistencia a la tracción cuando se usan como agentes adhesivos en restauraciones indirectas de resina.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Indirect resin restorations are widely used in the esthetic treatment of posterior teeth. Preheated resins have been recently proposed as luting agents.  Objective:  Evaluate the tensile bond strength of indirect restorations cemented with a preheated resin versus a self-adhesive resin cement and a resinous cement.  Methods:  Tooth preparation was conducted of 45 premolars using calibrated diamond-coated stones. The samples were randomly divided into three sets (n = 15) according to the following experimental groups: Group 1 (preheated resin), Group 2 (self-adhesive resin) and Group 3 (adhesive resinous cement), and soaked in self-polimerizable acrylic. Indirect restorations were performed for each sample. The inner surfaces were microsanded, and silane was applied before cementation with the luting agents. Tensile bond strength was verified with a universal testing machine at a crosshead speed of 5 mm/min. Statistical analysis was based on one-factor ANOVA and Tukey's post hoc test. A significance level of p &lt; 0.05 was established.  Results:  The Filtek Z250 XT resin preheated at 60°C for 15 minutes displayed a tensile bond strength of 5.775 MPa, similar to RelyX Ultimate with 5.442 MPa (p &gt; 0.05). Both groups displayed a significantly greater tensile bond strength than RelyX U200 (3.430 MPa).  Conclusions:  The preheated resin (Filtek Z250 XT) and the resinous cement (RelyX Ultimate) exhibit the same tensile bond strength properties when used as luting agents in indirect resin restorations.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[adhesión dentaria]]></kwd>
<kwd lng="es"><![CDATA[cementos resinosos]]></kwd>
<kwd lng="es"><![CDATA[restauración dentaria]]></kwd>
<kwd lng="en"><![CDATA[dental adhesion]]></kwd>
<kwd lng="en"><![CDATA[resinous cements]]></kwd>
<kwd lng="en"><![CDATA[dental restoration]]></kwd>
</kwd-group>
</article-meta>
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