<?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>S1646-28902022000300147</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2022.09.874</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Volume do seio maxilar em doentes submetidos a tratamento ortodôntico-cirúrgico: estudo retrospetivo]]></article-title>
<article-title xml:lang="en"><![CDATA[Maxillary sinus volume in patients undergoing orthodontic-surgical treatment: a retrospective study]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vale]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrazes]]></surname>
<given-names><![CDATA[Mariana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Travassos]]></surname>
<given-names><![CDATA[Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodrigues]]></surname>
<given-names><![CDATA[Maria João]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caramelo]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Francisco]]></surname>
<given-names><![CDATA[Inês]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Medicina Instituto de Ortodontia]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Medicina ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Medicina ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Medicina Instituto de Investigação Clínica e Biomédica de Coimbra (iCBR)]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Medicina Instituto de Investigação Clínica e Biomédica de Coimbra (iCBR), Área de Meio Ambiente]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>09</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>09</month>
<year>2022</year>
</pub-date>
<volume>63</volume>
<numero>3</numero>
<fpage>147</fpage>
<lpage>153</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902022000300147&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902022000300147&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902022000300147&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objetivos:  A osteotomia de Le Fort I pode induzir alterações estruturais ou anatómicas nas vias aéreas superiores, particularmente ao nível dos seios maxilares. O objetivo deste estudo foi comparar o volume dos seios maxilares antes e após a osteotomia de Le Fort I de avanço.  Metódos:  Neste estudo retrospetivo foram incluídos 19 doentes submetidos a tratamento ortodôntico-cirúrgico com osteotomia de Le Fort I de avanço. As tomografias computorizadas de feixe cónico, pré-operatória (T0) e pós-operatória (T1), foram analisadas com recurso ao software ITK-SNAP a fim de avaliar o volume dos seios maxilares. O teste t de Student para amostras emparelhadas foi utilizado para avaliar o efeito da osteotomia de Le Fort I de avanço no volume dos seios maxilares. Considerou-se um nível de significância de p&lt;0,05.  Resultados:  Não foram encontradas diferenças estatisticamente significativas no volume dos seios maxilares após a cirurgia ortognática (p=0,494). No entanto, verificou-se um aumento do volume pós-operatório do seio maxilar direito no sexo masculino (p=0,037). Por outro lado, no sexo feminino não foram encontradas diferenças estatisticamente significativas nem no seio maxilar direito (p=0,150) nem no esquerdo (p=0,370).  Conclusões:  Não foram encontradas diferenças estatisticamente significativas no volume do seio maxilar após a osteotomia de Le Fort I de avanço. Em relação ao sexo, o sexo masculino apresenta um volume maior no seio maxilar direito do que o sexo feminino no pós-operatório.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objectives:  Structural or anatomical differences in the upper airways may arise after Le Fort I osteotomy, namely in the maxillary sinus. The present study aimed to compare the maxillary sinus volume before and after a Le Fort I advancement osteotomy.  Methods:  In this retrospective study, 19 orthodontic patients who underwent orthognathic surgery with Le Fort I advancement osteotomy were included. Preoperative (T0) and postoperative (T1) cone-beam computed tomographies were evaluated with the ITK-SNAP software to access the maxillary sinus volume. The paired-samples t test was used to assess the effect of Le Fort I advancement osteotomy on the maxillary sinus volume. A significance level of p&lt;0.05 was adopted.  Results:  No statistically significant differences were found in the maxillary sinus volume after orthognathic surgery (p=0.494). However, there was an increase in the postoperative volume of the right maxillary sinus in males (p = 0.037). Contrarily, no statistically significant diferences were found in females, neither on the right (p=0.150) or left (p=0.370) maxillary sinus.  Conclusions:  No statistically significant differences were found in the maxillary sinus volume after Le Fort I advancement osteotomy. Regarding sex, males had a larger right maxillary sinus volume than females in the postoperative period.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Cirurgia ortognática]]></kwd>
<kwd lng="pt"><![CDATA[Ortodontia]]></kwd>
<kwd lng="pt"><![CDATA[Osteotomia de Le Fort]]></kwd>
<kwd lng="pt"><![CDATA[Seio maxilar]]></kwd>
<kwd lng="pt"><![CDATA[Tomografia computorizada de feixe cónico]]></kwd>
<kwd lng="en"><![CDATA[Orthognathic surgery]]></kwd>
<kwd lng="en"><![CDATA[Orthodontics]]></kwd>
<kwd lng="en"><![CDATA[Osteotomy]]></kwd>
<kwd lng="en"><![CDATA[Le Fort]]></kwd>
<kwd lng="en"><![CDATA[Maxillary sinus]]></kwd>
<kwd lng="en"><![CDATA[Cone-beam computed tomography]]></kwd>
</kwd-group>
</article-meta>
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