<?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>S1646-28902021000400194</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2021.12.851</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Fit accuracy of removable partial denture metal frameworks produced by CAD-CAM - a clinical study]]></article-title>
<article-title xml:lang="pt"><![CDATA[Adaptação de esqueletos metálicos de próteses parciais removíveis produzidos por CAD-CAM - estudo clínico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conceição]]></surname>
<given-names><![CDATA[Pedro R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Franco]]></surname>
<given-names><![CDATA[Margarida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[Nuno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Neves]]></surname>
<given-names><![CDATA[Cristina B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Lisboa Faculdade de Medicina Dentária Unidade de Investigação em Ciências Orais e Biomédicas]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico de Leiria Centro para o Desenvolvimento Rápido e Sustentado de Produto ]]></institution>
<addr-line><![CDATA[Marinha Grande ]]></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>194</fpage>
<lpage>200</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902021000400194&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902021000400194&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902021000400194&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objectives:  To assess the effect of a CAD-CAM protocol fabrication on the clinical fit accuracy of removable partial denture metal frameworks to abutment teeth.  Methods:  Fifteen patients with partial edentulism were selected to participate in this clinical study, and twenty dental arch rehabilitations were planned. For each dental arch (n=20), two cobalt-chromium frameworks were produced through two protocols: CAD-CAM production (experimental group); and conventional lost-wax casting technique (control group). Clinical fit accuracy was assessed using an indirect quantitative method to evaluate the gap between the framework occlusal rest and the corresponding rest seat. A silicone mold of that gap was obtained, digitized, and analyzed by micro-computed tomography. The two silicone molds obtained for each occlusal rest were overlapped and evaluated for thickness and volume. Data were analyzed with the paired t test for silicone thickness results and the Wilcoxon test for silicone volume results (&#945;= 0.05).  Results:  Considering the two dependent variables under study, no statistically significant (p=0.441 for silicone thickness and p=0.204 for silicone volume) differences were found between groups.  Conclusions:  The results of this study suggest that the CAD-CAM protocol applied is a viable method for the production of removable partial denture metal frameworks.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objectivos:  Avaliar o efeito da produção CAD-CAM de esqueletos metálicos de próteses parciais removíveis na adaptação clínica aos dentes de suporte.  Métodos:  Quinze pacientes foram selecionados para participar no estudo, tendo sido planeada a reabilitação de vinte arcadas dentárias parcialmente desdentadas. Para cada arcada dentária (n=20) foram produzidos dois esqueletos metálicos em cobalto-crómio segundo dois protocolos: por CAD-CAM (grupo experimental) e pela técnica convencional de fundição da cera perdida (grupo controlo). A adaptação clínica foi avaliada através da moldagem do espaço existente entre o apoio oclusal do esqueleto metálico e a sede dentária correspondente com silicone, cujo resultado foi digitalizado e posteriormente analisado com recurso a tecnologia de microtomografia computadorizada. Os dois moldes de silicone obtidos em cada apoio oclusal foram sobrepostos e avaliados na sua espessura e volume. Os dados recolhidos para a espessura de silicone foram analisados segundo um teste t de Student emparelhado, enquanto os dados obtidos para o volume de silicone foram analisados recorrendo a um teste de Wilcoxon (&#945;=0,05).  Resultados:  Considerando as duas variáveis dependentes estudadas, não foram encontradas diferenças estatisticamente significativas (p=0,441 para a espessura de silicone e p=0,204 para o volume de silicone) entre os dois grupos.  Conclusões:  Os resultados deste estudo sugerem que o protocolo CAD-CAM aplicado é um método viável para a produção de esqueletos metálicos de próteses parciais removíveis.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[CAD-CAM]]></kwd>
<kwd lng="en"><![CDATA[Clinical fit accuracy]]></kwd>
<kwd lng="en"><![CDATA[Micro-computed tomography]]></kwd>
<kwd lng="en"><![CDATA[Removable partial denture metal]]></kwd>
<kwd lng="en"><![CDATA[Framework]]></kwd>
<kwd lng="pt"><![CDATA[CAD-CAM]]></kwd>
<kwd lng="pt"><![CDATA[Adaptação clínica]]></kwd>
<kwd lng="pt"><![CDATA[Microtomografia computadorizada]]></kwd>
<kwd lng="pt"><![CDATA[Esqueletos metálicos de próteses parciais removíveis.]]></kwd>
</kwd-group>
</article-meta>
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