<?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>1646-2890</journal-id>
<journal-title><![CDATA[Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Port Estomatol Med Dent Cir Maxilofac]]></abbrev-journal-title>
<issn>1646-2890</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Estomatologia e Medicina Dentária]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1646-28902021000400209</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2021.12.853</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[In vitro evaluation of the efficacy of diferente protocols on calcium hydroxide dressing removal]]></article-title>
<article-title xml:lang="pt"><![CDATA[Avaliação in vitro da eficácia de diferentes protocolos na remoção de pasta de hidróxido de cálcio]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Teles]]></surname>
<given-names><![CDATA[Ana Moura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reis]]></surname>
<given-names><![CDATA[Tiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Remoaldo]]></surname>
<given-names><![CDATA[Marina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[António Múrias dos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[João Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guimarães]]></surname>
<given-names><![CDATA[Duarte Antunes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Fernando Pessoa University Faculty of Health Sciences ]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Porto Research Centre in Biodiversity and Genetic Resources CIBIO-InBIO]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Coimbra Faculty of Medicine Institute of Endodontics]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>62</volume>
<numero>4</numero>
<fpage>209</fpage>
<lpage>216</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902021000400209&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902021000400209&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902021000400209&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective:  To compare in vitro irrigation systems&#8217; efficacy in removing calcium hydroxide paste (Ca(OH)2) in single-root teeth.  Methods:  Sixty permanent teeth were prepared using ProTaper® rotatory instruments, up to F3. Specimens were split longitudinally into two halves, and two grooves located in the apical and coronal zones were created. Ca(OH)2 application into the grooves was assessed by radiographic and photographic methods. After the halves were reassembled in a silicone mold, teeth were randomly divided into experimental groups (n=15), testing Ca(OH)2 removal: 1 - CanalBrush&#8482;; 2 - E1 - Irrisonic tip; 3 - manual dynamic irrigation (MDI); 4 - XP-endo Finisher® (XP). A total volume of 10 mL of 2.5% sodium hypochlorite was used in each tooth. Finally, all groups were scored regarding the Ca(OH)2 remnants using the same methods as before. Statistical analysis was conducted using the Kruskal-Wallis test followed by Mann-Whitney U tests (with Bonferroni correction). A value of p&lt;0.05 was considered statistically significant.  Results:  None of the techniques demonstrated 100% efficacy in both regions. CanalBrush&#8482; was more effective in the apical region. Overall, E1 - Irrisonic tip and CanalBrush&#8482; removed significantly more Ca(OH)2 than MDI and XP-endo Finisher® (p&lt;0.05).  Conclusion:  Globally, E1 - Irrisonic tip and CanalBrush&#8482; were more effective, although without statistically significant differences between them.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objetivo:  Comparar in vitro sistemas de irrigação na remoção de pasta de hidróxido de cálcio Ca(OH)2 em dentes monocanalares.  Métodos:  60 dentes permanentes foram preparados com instrumentos rotatórios Protaper®, até F3. Os espécimes foram divididos longitudinalmente em duas metades e dois sulcos localizados nas zonas apical e coronal foram criados. A aplicação de Ca(OH)2 nas ranhuras foi avaliada por métodos radiográficos e fotográficos. Após remontagem das metades em molde de silicone, os dentes foram divididos aleatoriamente em grupos experimentais (n = 15), testando-se a remoção do Ca(OH)2: 1 - Canal Brush® (CB); 2 - Helse Utrassonic® (HU); 3 - Irrigação Dinâmica Manual (MDI); 4 - XP-Endo Finisher® (XP). Um volume total de 10 ml de hipoclorito de sódio 2,5% foi utilizado em cada dente. Usando os mesmos métodos, todos os grupos foram pontuados em relação aos remanescentes de Ca(OH)2. A análise estatística foi realizada com o teste de Kruskal-Wallis seguido dos testes U de Mann-Whitney (com correção de Bonferroni). Um valor de p &lt;0,05 foi considerado estatisticamente significativo.  Resultados:  Nenhuma das técnicas foi 100% eficiente nas zonas coronal e apical. CB foi mais eficaz na zona apical. No compto global, HU e CB removeram significativamente mais Ca(OH)2 do que MDI e XP (p &lt;0,05).  Conclusão:  Globalmente, HU e CB foram mais eficazes, embora sem diferenças estatisticamente significativas entre elas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Calcium hydroxide]]></kwd>
<kwd lng="en"><![CDATA[Disinfection]]></kwd>
<kwd lng="en"><![CDATA[Endodontics]]></kwd>
<kwd lng="en"><![CDATA[Root canal irrigants]]></kwd>
<kwd lng="en"><![CDATA[Ultrasonic therapy]]></kwd>
<kwd lng="pt"><![CDATA[Hidróxido de cálcio]]></kwd>
<kwd lng="pt"><![CDATA[Desinfeção]]></kwd>
<kwd lng="pt"><![CDATA[Endodontia]]></kwd>
<kwd lng="pt"><![CDATA[Irrigantes do canal radicular]]></kwd>
<kwd lng="pt"><![CDATA[Terapia ultrassónica]]></kwd>
</kwd-group>
</article-meta>
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