<?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>2664-2891</journal-id>
<journal-title><![CDATA[Revista científica ciencias de la salud]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. cient. cienc. salud]]></abbrev-journal-title>
<issn>2664-2891</issn>
<publisher>
<publisher-name><![CDATA[Universidad del Pacífico]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2664-28912026000100229</article-id>
<article-id pub-id-type="doi">10.53732/rccsalud/e8904</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estabilidad dimensional en alginato HYDROGUM 5 sometidos a tres tipos de desinfectantes]]></article-title>
<article-title xml:lang="en"><![CDATA[Dimensional stability of HYDROGUM 5 alginate subjected to three types of disinfectants]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orue Martínez]]></surname>
<given-names><![CDATA[Leticia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paredes]]></surname>
<given-names><![CDATA[Claire Soledad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña]]></surname>
<given-names><![CDATA[Liza Maribel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramos Arrúa]]></surname>
<given-names><![CDATA[Rocío Marlene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Concepción Facultad de Odontología ]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2026</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2026</year>
</pub-date>
<volume>8</volume>
<fpage>229</fpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2664-28912026000100229&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2664-28912026000100229&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2664-28912026000100229&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción. La desinfección de impresiones dentales es esencial para prevenir la transmisión cruzada; sin embargo, algunos desinfectantes pueden alterar la estabilidad dimensional de los hidrocoloides irreversibles.  Objetivo. Este estudio evaluó la influencia de tres desinfectantes (glutaraldehído 2%, hipoclorito de sodio 2,5% y clorhexidina 0,12%) sobre la estabilidad dimensional del alginato Hydrogum 5.  Materiales y Método. Se realizó un estudio experimental in vitro. Se tomaron impresiones del modelo maestro con Hydrogum 5 y se dividieron en tres grupos (n = 10): A1 inmersión en glutaraldehído 2% por 10 min; A2 en hipoclorito de sodio 2,5% por 10 min; y A3 en clorhexidina 0,12% por 10 min. Tras la inmersión, las impresiones se lavaron durante 5 s, se secaron con aire 5 s y se vaciaron. Se midieron diámetro, alto y ancho del modelo vaciado con calibrador digital, calculándose las diferencias dimensionales respecto al modelo maestro. Se aplicaron las pruebas de Shapiro&#8211;Wilk (normalidad) y homogeneidad de varianzas, utilizando ANOVA o pruebas alternativas según los supuestos.  Resultados. Todas las medias de las diferencias en alto mostraron expansión, siendo mayor en A2 (hipoclorito) y menor en A1 (glutaraldehído). En el ancho, se observaron expansiones en A1 y A3. El análisis post-hoc evidenció diferencias significativas (p&lt;0,05) entre el hipoclorito y los otros desinfectantes.  Conclusión. Hydrogum 5 presenta susceptibilidad a variaciones dimensionales tras la desinfección; no obstante, clorhexidina 0,12% y glutaraldehído 2% producen alteraciones menores y clínicamente aceptables.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction. The disinfection of dental impressions is essential to prevent cross-contamination; however, some disinfectants may affect the dimensional stability of irreversible hydrocolloids.  Objective. This study aimed to evaluate the influence of three disinfectants (2% glutaraldehyde, 2.5% sodium hypochlorite, and 0.12% chlorhexidine) on the dimensional stability of Hydrogum 5 alginate.  Materials and Method. An in vitro experimental study was conducted using impressions of a master model made with Hydrogum 5. The impressions were divided into three groups (n = 10): Group A1, immersed in 2% glutaraldehyde for 10 min; Group A2, immersed in 2.5% sodium hypochlorite for 10 min; and Group A3, immersed in 0.12% chlorhexidine for 10 min. After immersion, impressions were rinsed for 5 s, air-dried for 5 s, and poured immediately. The diameter, height, and width of the casts were measured with a digital vernier caliper, and dimensional differences from the master model were calculated. Data were analyzed using the Shapiro&#8211;Wilk test for normality and variance homogeneity tests; ANOVA and post-hoc comparisons were applied accordingly.  Results. All mean height differences showed expansion, with the greatest in A2 (hypochlorite) and the smallest in A1 (glutaraldehyde). Width expansion was observed in A1 and A3. Variance homogeneity was confirmed for height but rejected for width. Tukey's test showed significant differences (p = 0.05) in width between sodium hypochlorite and the other disinfectants.  Conclusion. It was concluded that Hydrogum 5 exhibits slight dimensional variability after disinfection; however, 0.12% chlorhexidine and 2% glutaraldehyde produced minimal changes and acceptable clinical stability.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[alginato]]></kwd>
<kwd lng="es"><![CDATA[desinfección]]></kwd>
<kwd lng="es"><![CDATA[estabilidad dimensional]]></kwd>
<kwd lng="en"><![CDATA[alginate]]></kwd>
<kwd lng="en"><![CDATA[disinfectants]]></kwd>
<kwd lng="en"><![CDATA[dimensional stability]]></kwd>
</kwd-group>
</article-meta>
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