<?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>2215-3411</journal-id>
<journal-title><![CDATA[Odovtos International Journal of Dental Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Odovtos]]></abbrev-journal-title>
<issn>2215-3411</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Odontología. Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-34112023000100044</article-id>
<article-id pub-id-type="doi">10.15517/ijds.2022.52470</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Biomechanical and chemical behavior of various bioactive materials in class II restorations]]></article-title>
<article-title xml:lang="es"><![CDATA[Desempeño biomecánico y químico de diferentes materiales bioactivos en restauraciones clase II]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Barrantes]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quesada-Rojas]]></surname>
<given-names><![CDATA[Francisco Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Facultad de Odontología Departamento de Ciencias Restaurativas]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>25</volume>
<numero>1</numero>
<fpage>44</fpage>
<lpage>57</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-34112023000100044&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-34112023000100044&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-34112023000100044&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this in vitro study was to evaluate the biomechanical and chemical behavior of various bioactive materials in class II MOD restorations. Forty- eight standardized class II MOD cavities were prepared in sound extracted human molar teeth. The specimens were divided into four groups according to the restorative material: Group 1 (Filtek&#8482; Z350 XT), Group 2 (Biodentine&#8482; as a liner, and then restored with Filtek&#8482; Z350 XT), Group 3 (Cention N&#8482;), and Group 4 (Activa&#8482; Bioactive-Restorative). The samples were tested for fracture resistance by subjecting them to a compressive load in a Universal testing Machine. The failure modes of each specimen were evaluated. The alkalinizing potential and calcium ion release of the materials were measured. SEM-EDAX analyses were also performed for all materials. Data were analyzed using ANOVA and post hoc Tukey test (p&lt;0.05). Group 1 showed the higher fracture resistance (p&lt;0.05). Group 3 had greater fracture resistance values but no statistical difference from Group 4. Biodentine&#8482; showed greater biomineralization potential. Class II MOD restorations of Group 1 displayed the higher fracture resistance; however, it was highly associated with catastrophic failure. Conversely, Biodentine&#8482; presented a more significant bioactivity potential, and its use, as in Group 2, promoted the most favorable failure mode.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de este estudio, in vitro, fue evaluar el desempeño biomecánico y químico de varios materiales bioactivos en restauraciones clase II MOD. Se prepararon cuarenta y ocho cavidades clase II MOD estandarizadas en dientes molares humanos extraídos. Las muestras se dividieron en cuatro grupos según el material de restauración: Grupo 1 (Filtek&#8482; Z350 XT), Grupo 2 (Biodentine&#8482; como base y luego restaurado con Filtek&#8482; Z350 XT), Grupo 3 (Cention N&#8482;) y Grupo 4 (Activa&#8482; Bioactivo-Reparador). La prueba de resistencia a la fractura fue realizada en una máquina de ensayo universal Instron. Se evaluaron los modos de falla de cada espécimen. Se midió el pH y la liberación de iones de calcio de los materiales. Se realizaron análisis SEM-EDAX. Los datos se analizaron mediante ANOVA y la prueba post hoc de Tukey (p&lt;0,05). El grupo 1 mostró la mayor resistencia a la fractura (p&lt;0,05). El Grupo 3 tuvo mayores valores de resistencia a la fractura que el Grupo 4, pero sin diferencia estadística. Biodentine&#8482; mostró un mayor potencial de biomineralización. Las restauraciones Clase II MOD del Grupo 1 mostraron la mayor resistencia a la fractura; sin embargo, estuvo altamente asociado con fallas irreparables. Por el contrario, Biodentine&#8482; presentó un potencial de bioactividad más significativo y su uso, como en el Grupo 2, promovió el modo de falla más favorable.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Bioactive materials]]></kwd>
<kwd lng="en"><![CDATA[Class II restorations]]></kwd>
<kwd lng="en"><![CDATA[Composite resins]]></kwd>
<kwd lng="en"><![CDATA[Fracture resistance]]></kwd>
<kwd lng="es"><![CDATA[Materiales bioactivos]]></kwd>
<kwd lng="es"><![CDATA[Restauraciones clase II]]></kwd>
<kwd lng="es"><![CDATA[Resinas compuestas]]></kwd>
<kwd lng="es"><![CDATA[Resistencia a la fractura]]></kwd>
</kwd-group>
</article-meta>
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