<?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>0870-9025</journal-id>
<journal-title><![CDATA[Revista Portuguesa de Saúde Pública]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Port. Sau. Pub.]]></abbrev-journal-title>
<issn>0870-9025</issn>
<publisher>
<publisher-name><![CDATA[Escola Nacional de Saúde Pública]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0870-90252016000300006</article-id>
<article-id pub-id-type="doi">10.1016/j.rpsp.2016.06.002</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Escovagem de dentes em ambiente escolar e redução do índice de placa bacteriana: avaliação da efetividade de um projeto de saúde oral]]></article-title>
<article-title xml:lang="en"><![CDATA[Tooth brushing at school and reduction on dental plaque: Evaluation of the effectiveness of an Oral Health project]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodrigues]]></surname>
<given-names><![CDATA[Ana Paula]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Matias]]></surname>
<given-names><![CDATA[Fernanda]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[Maria Manuela]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Nacional de Saúde Doutor Ricardo Jorge Departamento de Epidemiologia ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Agrupamento de Centros de Saúde do Baixo Vouga Unidade de Recursos Assistenciais Partilhados ]]></institution>
<addr-line><![CDATA[Aveiro ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Agrupamento de Centros de Saúde do Baixo Vouga Unidade de Saúde Pública ]]></institution>
<addr-line><![CDATA[Aveiro ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Escola Superior de Enfermagem da Cruz Vermelha Portuguesa  ]]></institution>
<addr-line><![CDATA[Oliveira de Azeméis ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2016</year>
</pub-date>
<volume>34</volume>
<numero>3</numero>
<fpage>244</fpage>
<lpage>249</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0870-90252016000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0870-90252016000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0870-90252016000300006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Dada a elevada prevalência de cárie em Portugal em idades jovens, a equipa de saúde escolar do concelho de Oliveira do Bairro (distrito de Aveiro), desenvolveu, durante o ano letivo 2012/13, um projeto de educação para a saúde, denominado Senhor Dente, dirigido a crianças em idade pré-escolar (3-6 anos) que consistiu na implementação da escovagem na escola. Com este estudo pretendeu-se determinar o grau de redução da placa bacteriana nas crianças abrangidas pelo referido projeto, de forma a avaliar a sua efetividade na redução das cáries dentárias. Efetuou-se um estudo quasi experimental, no qual foi avaliado o índice de placa bacteriana individual antes e após a implementação do projeto (n inicial = 256; n final = 190). Antes da intervenção, estimou-se uma prevalência de cárie dentária de 32,8% (IC 95%: 27,0-38,6). Após a implementação da escovagem dentária na escola, observou-se uma redução do índice de placa bacteriana de 2,45 (IC 95%: 2,38-2,51), havendo uma associação estatisticamente significativa entre a variação no índice de placa bacteriana e o valor inicial do índice de dentes cariados, perdidos e obturados por cárie e, também, com o intervalo de tempo decorrido entre os 2 momentos de avaliação. Os resultados demonstraram a efetividade dos programas de saúde escolar que promovam a escovagem dentária diária na escola e sugerem a necessidade de avaliar qual deve ser a duração destes projetos, como forma de otimizar os recursos necessários para o seu desenvolvimento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Facing the high prevalence of dental caries in Portuguese children, the school health team of Oliveira do Bairro county (district of Aveiro) launched an health education project (Mr. Tooth Project), during 2012/13, intended to preschool age (3-6 years) and consisting in the implementation of tooth brushing at school. The study aimed to estimate the reduction of dental plaque in children covered by this project in order to evaluate its effectiveness on dental caries's reduction. A quasi-experimental study was developed and the individual dental plaque index was evaluated before and after Mr Tooth Project implementation (n before = 256; n after = 190). Prevalence of caries estimated before the beginning of the intervention was 32.8% (95% CI: 27.0% - 38.6%). The reduction of dental plaque index found between evaluations was 2.45 (95% CI: 2.38-2.51). A positive association between dental plaque index reduction and number of decayed, missing and filled teeth due to caries, and also with initial dental plaque index, was demonstrated. A negative association between dental plaque index reduction and interval between evaluations was also found. The results pointed to the effectiveness of school health programs that promotes daily tooth brushing at school and suggest the need to evaluate intervention projects span in order to optimize resources for its development.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Cárie dentária]]></kwd>
<kwd lng="pt"><![CDATA[Saúde escolar]]></kwd>
<kwd lng="pt"><![CDATA[Prevenção primária]]></kwd>
<kwd lng="pt"><![CDATA[Portugal]]></kwd>
<kwd lng="en"><![CDATA[Dental caries]]></kwd>
<kwd lng="en"><![CDATA[School health]]></kwd>
<kwd lng="en"><![CDATA[Primary prevention]]></kwd>
<kwd lng="en"><![CDATA[Portugal]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p style="text-align: right;"><b>ARTIGO ORIGINAL</b></p>     <p>&nbsp;</p>     <p><b>Escovagem de dentes em ambiente escolar e redu&ccedil;&atilde;o do &iacute;ndice de placa bacteriana: avalia&ccedil;&atilde;o da efetividade de um projeto de sa&uacute;de oral</b></p>     <p><b>Tooth brushing at school and reduction on dental plaque: Evaluation of the effectiveness of an Oral Health project</b></p>     <p>&nbsp;</p>     <p><b>Ana Paula Rodrigues <sup>a</sup><sup>, </sup><sup>&#8270;</sup><sup>, </sup><sup> * </sup>, Fernanda Matias <sup>b</sup>, Maria Manuela Ferreira <sup>c</sup><sup>, </sup><sup>d</sup></b></p>     <p>a Departamento de Epidemiologia, Instituto Nacional de Sa&uacute;de Doutor Ricardo Jorge, Lisboa, Portugal</p>     <p>b Unidade de Recursos Assistenciais Partilhados, Agrupamento de Centros de Sa&uacute;de do Baixo Vouga, Aveiro, Portugal</p>     <p>c Unidade de Sa&uacute;de P&uacute;blica, Agrupamento de Centros de Sa&uacute;de do Baixo Vouga, Aveiro, Portugal</p>     <p>d Escola Superior de Enfermagem da Cruz Vermelha Portuguesa, Oliveira de Azem&eacute;is, Portugal</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p> <a href="#c0">Endereço para Correspondência</a><a name="topc0"></a>     <p>&nbsp;</p>     <p><b>RESUMO</b></p>     <p>Dada a elevada preval&ecirc;ncia de c&aacute;rie em Portugal em idades jovens, a equipa de sa&uacute;de escolar do concelho de Oliveira do Bairro (distrito de Aveiro), desenvolveu, durante o ano letivo 2012/13, um projeto de educa&ccedil;&atilde;o para a sa&uacute;de, denominado <i>Senhor Dente</i>, dirigido a crian&ccedil;as em idade pr&eacute;&#8208;escolar (3&#8208;6 anos) que consistiu na implementa&ccedil;&atilde;o da escovagem na escola.</p>     <p>Com este estudo pretendeu&#8208;se determinar o grau de redu&ccedil;&atilde;o da placa bacteriana nas crian&ccedil;as abrangidas pelo referido projeto, de forma a avaliar a sua efetividade na redu&ccedil;&atilde;o das c&aacute;ries dent&aacute;rias.</p>     <p>Efetuou&#8208;se um estudo <i>quasi experimental</i>, no qual foi avaliado o &iacute;ndice de placa bacteriana individual antes e ap&oacute;s a implementa&ccedil;&atilde;o do projeto (n<sub>inicial</sub> = 256; n<sub>final</sub> = 190).</p>     <p>Antes da interven&ccedil;&atilde;o, estimou&#8208;se uma preval&ecirc;ncia de c&aacute;rie dent&aacute;ria de 32,8% (IC 95%: 27,0&#8208;38,6). Ap&oacute;s a implementa&ccedil;&atilde;o da escovagem dent&aacute;ria na escola, observou&#8208;se uma redu&ccedil;&atilde;o do &iacute;ndice de placa bacteriana de 2,45 (IC 95%: 2,38&#8208;2,51), havendo uma associa&ccedil;&atilde;o estatisticamente significativa entre a <i>varia&ccedil;&atilde;o no &iacute;ndice de placa bacteriana</i> e o <i>valor inicial do &iacute;ndice de dentes cariados, perdidos e obturados por c&aacute;rie</i> e, tamb&eacute;m, com o <i>intervalo de tempo decorrido entre os 2 momentos de avalia&ccedil;&atilde;o</i>.</p>     <p>Os resultados demonstraram a efetividade dos programas de sa&uacute;de escolar que promovam a escovagem dent&aacute;ria di&aacute;ria na escola e sugerem a necessidade de avaliar qual deve ser a dura&ccedil;&atilde;o destes projetos, como forma de otimizar os recursos necess&aacute;rios para o seu desenvolvimento.</p>     <p><b>Palavras&#8208;chave</b>: C&aacute;rie dent&aacute;ria. Sa&uacute;de escolar. Preven&ccedil;&atilde;o prim&aacute;ria. Portugal.</p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><b>ABSTRACT</b></p>     <p>Facing the high prevalence of dental caries in Portuguese children, the school health team of Oliveira do Bairro county (district of Aveiro) launched an health education project (<i>Mr. Tooth Project</i>), during 2012/13, intended to preschool age (3&#8208;6 years) and consisting in the implementation of tooth brushing at school.</p>     <p>The study aimed to estimate the reduction of dental plaque in children covered by this project in order to evaluate its effectiveness on dental caries's reduction.</p>     <p>A quasi&#8208;experimental study was developed and the individual dental plaque index was evaluated before and <i>after Mr Tooth Project</i> implementation (n<sub>before</sub> = 256; n<sub>after</sub> = 190).</p>     <p>Prevalence of caries estimated before the beginning of the intervention was 32.8% (95% CI: 27.0% &#8208; 38.6%). The reduction of dental plaque index found between evaluations was 2.45 (95% CI: 2.38&#8208;2.51). A positive association between dental plaque index reduction and number of decayed, missing and filled teeth due to caries, and also with initial dental plaque index, was demonstrated. A negative association between dental plaque index reduction and interval between evaluations was also found.</p>     <p>The results pointed to the effectiveness of school health programs that promotes daily tooth brushing at school and suggest the need to evaluate intervention projects span in order to optimize resources for its development.</p>     <p><b>Keywords</b>: Dental caries. School health. Primary prevention. Portugal.</p>     <p>&nbsp;</p>     <p><b>Introdu&ccedil;&atilde;o</b></p>     <p>A c&aacute;rie dent&aacute;ria &eacute; a doen&ccedil;a cr&oacute;nica mais comum durante a inf&acirc;ncia, causando dor severa, ansiedade e altera&ccedil;&otilde;es do sono, e levando a elevado consumo de recursos de sa&uacute;de<sup>1,2</sup>.</p>     ]]></body>
<body><![CDATA[<p>A presen&ccedil;a de fatores de risco para a c&aacute;rie dent&aacute;ria durante a inf&acirc;ncia precoce aumenta o risco do seu aparecimento durante a adolesc&ecirc;ncia<sup>3</sup>, embora uma dieta n&atilde;o cariog&eacute;nica e uma boa higiene oral possam reduzir o risco de c&aacute;rie nessas crian&ccedil;as<sup>4</sup>.</p>     <p>De acordo com o &uacute;ltimo estudo nacional de preval&ecirc;ncia de doen&ccedil;as orais, a preval&ecirc;ncia de c&aacute;rie dent&aacute;ria em Portugal aos 6 anos &eacute; de 49%, aumentando at&eacute; aos 72% aos 15 anos de idade<sup>5</sup>. O &iacute;ndice de dentes cariados, perdidos e obturados na denti&ccedil;&atilde;o tempor&aacute;ria (cpod) e definitiva (CPOD) aos 6 anos &eacute;, respetivamente, de 0,07 e 2,10, aumentando este &uacute;ltimo at&eacute; aos 3,04 aos 15 anos<sup>5</sup>. Salienta&#8208;se que, de acordo com o mesmo estudo, a regi&atilde;o centro apresenta uma preval&ecirc;ncia de c&aacute;rie aos 6 anos de idade mais elevada que a maioria das outras regi&otilde;es de sa&uacute;de (49%) e, num estudo explorat&oacute;rio realizado em Ovar, observou&#8208;se um risco elevado de desenvolver c&aacute;rie dent&aacute;ria entre os 4&#8208;7 anos de idade<sup>6</sup>.</p>     <p>O Programa Nacional de Promo&ccedil;&atilde;o da Sa&uacute;de Oral (PNSO) assenta em estrat&eacute;gias de promo&ccedil;&atilde;o da sa&uacute;de, preven&ccedil;&atilde;o prim&aacute;ria e secund&aacute;ria da c&aacute;rie dent&aacute;ria, nomeadamente, realiza&ccedil;&atilde;o de sess&otilde;es de educa&ccedil;&atilde;o para a sa&uacute;de sobre higiene oral, escovagem dent&aacute;ria na escola, aplica&ccedil;&atilde;o de selantes de fissura e tratamento de dentes cariados (atrav&eacute;s da distribui&ccedil;&atilde;o de cheques&#8208;dentista)<sup>7</sup>.</p>     <p>Tendo em conta as metas tra&ccedil;adas pela Organiza&ccedil;&atilde;o Mundial de Sa&uacute;de (OMS) para as crian&ccedil;as em idade pr&eacute;&#8208;escolar (80% das crian&ccedil;as com 6 anos livres de c&aacute;rie)<sup>5</sup>, s&atilde;o priorit&aacute;rias as estrat&eacute;gias de promo&ccedil;&atilde;o da sa&uacute;de e preven&ccedil;&atilde;o prim&aacute;ria de c&aacute;rie dent&aacute;ria<sup>8</sup>, nomeadamente, a utiliza&ccedil;&atilde;o de fluoretos t&oacute;picos<sup>9&ndash;14</sup>, a redu&ccedil;&atilde;o do consumo de a&ccedil;&uacute;cares, a utiliza&ccedil;&atilde;o de fluoretos sist&eacute;micos em crian&ccedil;as com elevado risco de c&aacute;rie<sup>14</sup> e a escovagem dent&aacute;ria com dent&iacute;frico fluoretado<sup>7,15</sup>. De todas as interven&ccedil;&otilde;es, a escovagem dent&aacute;ria com dent&iacute;frico fluoretado &eacute; referida como a estrat&eacute;gia universal mais custo&#8208;efetiva, sendo mais eficaz que a restri&ccedil;&atilde;o de a&ccedil;&uacute;cares na redu&ccedil;&atilde;o da c&aacute;rie dent&aacute;ria<sup>15</sup>. De acordo com as recomenda&ccedil;&otilde;es atuais, preconiza&#8208;se a realiza&ccedil;&atilde;o de 2 escovagens di&aacute;rias com dent&iacute;frico fluoretado de 1.000&#8208;1.500 ppm, devendo uma das escovagens ser antes de deitar<sup>7,11,16</sup>. No entanto, de acordo com os &uacute;ltimos dados dispon&iacute;veis, em Portugal, apenas 50% das crian&ccedil;as de 6 anos de idade realizam 2 ou mais escovagens de dentes di&aacute;rias e na regi&atilde;o centro esse valor decresce para 30%<sup>5</sup>. Por esta raz&atilde;o, consider&aacute;mos priorit&aacute;rio o desenvolvimento de um programa de sa&uacute;de oral dirigido &agrave;s crian&ccedil;as em idade pr&eacute;&#8208;escolar. A OMS refere o contexto escolar como ideal para desenvolver programas de promo&ccedil;&atilde;o da sa&uacute;de oral durante a inf&acirc;ncia<sup>5</sup>, embora se saliente que a efetividade destes programas &eacute; influenciada pelo n&iacute;vel de escolaridade dos pais<sup>17</sup>, pela perce&ccedil;&atilde;o sobre a sua pr&oacute;pria sa&uacute;de oral<sup>18,19</sup> e pelo contexto social das fam&iacute;lias<sup>20</sup>. Muitos dos programas escolares de promo&ccedil;&atilde;o da sa&uacute;de oral assentam na realiza&ccedil;&atilde;o de sess&otilde;es de educa&ccedil;&atilde;o para a sa&uacute;de para crian&ccedil;as e, em alguns casos, tamb&eacute;m para pais, n&atilde;o tendo sido demonstrada a efic&aacute;cia dessas interven&ccedil;&otilde;es na redu&ccedil;&atilde;o do n&uacute;mero de c&aacute;ries em diversos estudos<sup>9,21,22</sup>. No entanto, programas que definem interven&ccedil;&otilde;es com pais e crian&ccedil;as<sup>8,23,24</sup>, e naqueles em que &eacute; feita supervis&atilde;o da escovagem em ambiente escolar<sup>8,25&ndash;34</sup>, h&aacute; melhoria do n&iacute;vel de conhecimentos e redu&ccedil;&atilde;o das c&aacute;ries dent&aacute;rias.</p>     <p>Partindo deste conhecimento e tendo por base as orienta&ccedil;&otilde;es do PNPSO, a equipa de sa&uacute;de escolar do concelho de Oliveira do Bairro (distrito de Aveiro) desenvolveu um projeto de sa&uacute;de oral denominado <i>Senhor Dente</i>, dirigido &agrave;s crian&ccedil;as do ensino pr&eacute;&#8208;escolar e que consistiu na implementa&ccedil;&atilde;o da escovagem dent&aacute;ria em ambiente escolar. A escolha deste grupo et&aacute;rio prendeu&#8208;se com o seu potencial de aprendizagem e por ser este o per&iacute;odo em que ocorre a erup&ccedil;&atilde;o dos primeiros dentes permanentes, entre os quais o primeiro molar, o qual concentra o maior risco de c&aacute;rie<sup>34</sup>.</p>     <p>Assim, o presente estudo foi desenvolvido para avaliar a efetividade desta interven&ccedil;&atilde;o comunit&aacute;ria na redu&ccedil;&atilde;o da placa bacteriana e consequente redu&ccedil;&atilde;o do risco de c&aacute;rie dent&aacute;ria. Para al&eacute;m da aprecia&ccedil;&atilde;o dos ganhos em sa&uacute;de potencialmente alcan&ccedil;ados, a avalia&ccedil;&atilde;o de programas de sa&uacute;de oral em ambiente escolar assume especial relevo como fator motivador para pais, crian&ccedil;as e profissionais de educa&ccedil;&atilde;o<sup>35</sup>.</p>     <p>&nbsp;</p>     <p><b>Material e m&eacute;todos</b></p>     <p>A sele&ccedil;&atilde;o das escolas participantes no projeto <i>Senhor Dente</i> foi efetuada de acordo com a sua vontade de participa&ccedil;&atilde;o no projeto e com as condi&ccedil;&otilde;es f&iacute;sicas da escola (exist&ecirc;ncia de pontos de &aacute;gua suficientes, condi&ccedil;&otilde;es para guardar os <i>kits</i> de escovagem em seguran&ccedil;a).</p>     <p>O projeto <i>Senhor Dente</i> consistiu na realiza&ccedil;&atilde;o de 2 sess&otilde;es de educa&ccedil;&atilde;o para a sa&uacute;de, no in&iacute;cio e final do projeto, e na implementa&ccedil;&atilde;o da escovagem dent&aacute;ria di&aacute;ria em ambiente escolar.</p>     ]]></body>
<body><![CDATA[<p>As sess&otilde;es de educa&ccedil;&atilde;o para a sa&uacute;de foram dinamizadas por higienista oral e consistiram na visualiza&ccedil;&atilde;o de um filme sobre higiene oral, ensino e treino da t&eacute;cnica de escovagem e avalia&ccedil;&atilde;o oral de cada crian&ccedil;a, de acordo com os seguintes procedimentos:</p> <ul>       <li>1.posicionamento da crian&ccedil;a voltada para uma fonte de luz natural;</li>       <li>2.identifica&ccedil;&atilde;o do n&uacute;mero de dentes tempor&aacute;rios cariados, obturados ou perdidos por c&aacute;rie dent&aacute;ria;</li>       <li>3.avalia&ccedil;&atilde;o do &iacute;ndice de placa bacteriana (IP) pelo <i>M&eacute;todo de Green e Vermillion simplificado</i>, recomendado de acordo com o PNPSO na avalia&ccedil;&atilde;o das abordagens comunit&aacute;rios<sup>7</sup> e que consiste na avalia&ccedil;&atilde;o da extens&atilde;o da placa bacteriana em 6 dentes (<a href="#t1">tabela 1</a>), ap&oacute;s utiliza&ccedil;&atilde;o de um revelador de placa bacteriana (eritrosina).</li>     </ul>     <p>&nbsp;</p> <a name="t1"></a> <img src="/img/revistas/rpsp/v34n3/34n3a06t1.jpg">     
<p>&nbsp;</p>     <p>A extens&atilde;o da placa bacteriana foi classificada em cada dente de 0 (aus&ecirc;ncia de placa bacteriana) a 3 (placa bacteriana nos 2 ter&ccedil;os distais de cada dente). O &iacute;ndice de placa simplificado individual foi obtido de acordo com a seguinte f&oacute;rmula de c&aacute;lculo: &Sigma; &iacute;ndice de placa dos 6 dentes/6.</p>     <p>Nestas sess&otilde;es, a avalia&ccedil;&atilde;o oral foi a primeira atividade a ser realizada.</p>     <p>Durante todo o projeto, a escovagem dent&aacute;ria foi efetuada, por cada uma das crian&ccedil;as participantes ap&oacute;s a refei&ccedil;&atilde;o do almo&ccedil;o, usando pasta dent&iacute;frica fluoretada com 1.500 ppm, sob supervis&atilde;o das educadoras e auxiliares educativas. Para uniformiza&ccedil;&atilde;o dos procedimentos em todas as escolas, foi distribu&iacute;do um manual de procedimentos a todas as educadoras e auxiliares educativas.</p>     ]]></body>
<body><![CDATA[<p>Com o objetivo de determinar o grau de redu&ccedil;&atilde;o do IP ap&oacute;s a implementa&ccedil;&atilde;o do projeto <i>Senhor Dente</i>, desenvolveu&#8208;se um ensaio comunit&aacute;rio <i>quasi experimental</i><sup>36</sup>, no qual participaram todas as crian&ccedil;as a frequentar o ensino pr&eacute;&#8208;escolar do concelho de Oliveira do Bairro cujos encarregados de educa&ccedil;&atilde;o consentiram a participa&ccedil;&atilde;o no projeto <i>Senhor Dente</i> durante o ano lectivo 2012/13, com exce&ccedil;&atilde;o das crian&ccedil;as com menos de 3 anos.</p>     <p>Calculou&#8208;se a preval&ecirc;ncia de c&aacute;rie, &iacute;ndice de dentes tempor&aacute;rios cariados, obturados ou perdidos por c&aacute;rie dent&aacute;ria (cpod) na denti&ccedil;&atilde;o tempor&aacute;ria e o IP m&eacute;dio e respetivos intervalos de confian&ccedil;a a 95% (IC 95%).</p>     <p>Para o estudo de associa&ccedil;&otilde;es entre vari&aacute;veis num&eacute;ricas antes e ap&oacute;s a interven&ccedil;&atilde;o, usou&#8208;se o teste T de Student para amostras emparelhadas com um n&iacute;vel de signific&acirc;ncia de 5%.</p>     <p>Para a an&aacute;lise estat&iacute;stica, foi usado o programa <i>Statistical Package for the Social Sciences</i> (Vers&atilde;o 20).</p>     <p>&nbsp;</p>     <p><b>Aspetos &eacute;ticos</b></p>     <p>Foi solicitado o consentimento informado escrito aos pais/encarregados de educa&ccedil;&atilde;o das crian&ccedil;as participantes no projeto. Todas as crian&ccedil;as com problemas orais foram encaminhadas gratuitamente para higienista oral ou dentista.</p>     <p>&nbsp;</p>     <p><b>Resultados</b></p>     <p>Foram integradas no estudo 5 escolas, distribu&iacute;das por 4 das 6 freguesias do concelho de Oliveira do Bairro. O grupo de estudo foi constitu&iacute;do por 258 crian&ccedil;as (53,9% do sexo masculino), com idade m&eacute;dia de 60 meses e 12 dias (idade m&iacute;nima de 39 meses; idade m&aacute;xima de 82 meses).</p>     ]]></body>
<body><![CDATA[<p>Na avalia&ccedil;&atilde;o inicial foram observadas 256 crian&ccedil;as (99,2%), estimando&#8208;se uma preval&ecirc;ncia de c&aacute;rie dent&aacute;ria de 32,8% (IC 95%: 27,0&#8208;38,6%), um &iacute;ndice de cpod de 1,2 (IC 95%: 0,9&#8208;1,4) e um IP de 2,83 (IC 95%: 2,80&#8208;2,87), variando entre um m&iacute;nimo de 1,67 e um m&aacute;ximo de 3,00.</p>     <p>A idade e o IP revelaram estar positivamente associadas com o &iacute;ndice de cpod (<a href="#t2">tabela 2</a>), revelando que o n&uacute;mero de c&aacute;ries aumenta com a idade e com o maior n&iacute;vel de placa bacteriana.</p>     <p>&nbsp;</p> <a name="t2"></a> <img src="/img/revistas/rpsp/v34n3/34n3a06t2.jpg">     
<p>&nbsp;</p>     <p>A avalia&ccedil;&atilde;o final ocorreu em m&eacute;dia 106 dias ap&oacute;s a avalia&ccedil;&atilde;o inicial, variando entre os 28&#8208;254 dias. Tendo sido reavaliadas 190 crian&ccedil;as (76,3% do grupo de estudo), as restantes crian&ccedil;as n&atilde;o foram reavaliadas por indisponibilidade de uma das escolas participantes.</p>     <p>O grupo de crian&ccedil;as n&atilde;o reavaliadas n&atilde;o se diferenciou do grupo de crian&ccedil;as reavaliadas em rela&ccedil;&atilde;o ao &iacute;ndice de cpod e IP iniciais (<a href="#t3">tabela 3</a>).</p>     <p>&nbsp;</p> <a name="t3"></a> <img src="/img/revistas/rpsp/v34n3/34n3a06t3.jpg">     
<p>&nbsp;</p>     <p>O IP final estimado foi de 0,40 (IC 95%: 0,34&#8208;0,46) e a varia&ccedil;&atilde;o m&eacute;dia do IP entre as 2 avalia&ccedil;&otilde;es foi de 2,45 (IC a 95%: 2,38&#8208;2,51).</p>     <p>Observou&#8208;se a exist&ecirc;ncia de uma associa&ccedil;&atilde;o positiva entre o &iacute;ndice de cpod inicial e a varia&ccedil;&atilde;o do IP entre as 2 avalia&ccedil;&otilde;es, e uma associa&ccedil;&atilde;o negativa entre o intervalo de tempo decorrido entre os 2 momentos de avalia&ccedil;&atilde;o (<a href="#t4">tabela 4</a>), o que indica que a varia&ccedil;&atilde;o no IP foi maior nas crian&ccedil;as com maior n&uacute;mero de dentes perdidos, obturados ou cariados, e nas crian&ccedil;as cuja avalia&ccedil;&atilde;o final foi efetuada mais precocemente.</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p> <a name="t4"></a> <img src="/img/revistas/rpsp/v34n3/34n3a06q4.jpg">     
<p>&nbsp;</p>     <p><b>Discuss&atilde;o</b></p>     <p>A avalia&ccedil;&atilde;o inicial do IP revelou um excesso de placa de bacteriana nas superf&iacute;cies dent&aacute;rias da maioria das crian&ccedil;as inclu&iacute;das no grupo de estudo, observando&#8208;se uma associa&ccedil;&atilde;o positiva entre o IP e &iacute;ndice de cpod, o que est&aacute; de acordo com a hist&oacute;ria natural da c&aacute;rie dent&aacute;ria e refor&ccedil;a a necessidade de interven&ccedil;&otilde;es que reduzam a placa bacteriana como forma de preven&ccedil;&atilde;o da c&aacute;rie dent&aacute;ria.</p>     <p>A escovagem dent&aacute;ria na escola, preconizada como estrat&eacute;gia de preven&ccedil;&atilde;o prim&aacute;ria da c&aacute;rie em idades pr&eacute;&#8208;escolar<sup>8,21,37</sup>, demonstrou ser eficaz na redu&ccedil;&atilde;o da placa bacteriana ap&oacute;s um per&iacute;odo de seguimento m&eacute;dio de 106 dias. A escovagem dent&aacute;ria na escola apresenta benef&iacute;cios, por ser uma escovagem suplementar, mas tamb&eacute;m por permitir o ensino adequado da t&eacute;cnica de escovagem. A menor redu&ccedil;&atilde;o da placa bacteriana observada nas crian&ccedil;as cuja avalia&ccedil;&atilde;o final foi realizada mais tardiamente, leva&#8208;nos a colocar a hip&oacute;tese que o efeito protetor da escovagem dent&aacute;ria em ambiente escolar diminua ao longo do tempo, se n&atilde;o for efetuado um acompanhamento peri&oacute;dico das crian&ccedil;as, pelo descuido na t&eacute;cnica de escovagem, nomeadamente em rela&ccedil;&atilde;o ao tempo de dura&ccedil;&atilde;o da escovagem<sup>38</sup>. Estes resultados apontam a necessidade de considerar v&aacute;rios momentos de avalia&ccedil;&atilde;o e supervis&atilde;o da t&eacute;cnica de escovagem dent&aacute;ria em ambiente escolar, durante o delineamento dos projetos de sa&uacute;de oral, como forma de garantir melhores resultados na redu&ccedil;&atilde;o da c&aacute;rie dent&aacute;ria. Embora n&atilde;o se tenha observado uma associa&ccedil;&atilde;o entre a idade das crian&ccedil;as e a varia&ccedil;&atilde;o do IP, parece&#8208;nos que o acompanhamento peri&oacute;dico das crian&ccedil;as em programas de sa&uacute;de oral ser&aacute; especialmente importante para as crian&ccedil;as mais novas, dada a sua menor maturidade psicomotora.</p>     <p>Por outro lado, estes resultados sugerem a import&acirc;ncia de estudar o tempo &oacute;timo de desenvolvimento dos programas de sa&uacute;de oral na redu&ccedil;&atilde;o do risco de c&aacute;rie dent&aacute;ria, de forma a avaliar se o efeito protetor da escovagem dent&aacute;ria se mant&eacute;m apenas durante o per&iacute;odo de tempo em que &eacute; feita a escovagem dent&aacute;ria na escola, ou se prolonga para al&eacute;m do tempo de desenvolvimento destes programas de interven&ccedil;&atilde;o, atrav&eacute;s da ado&ccedil;&atilde;o de um comportamento que se implementa na vida da crian&ccedil;a e que, muitas vezes, se dissemina a toda a fam&iacute;lia. Este aspeto assumir&aacute; especial import&acirc;ncia no delineamento dos programas de interven&ccedil;&atilde;o em ambiente escolar mais eficientes, permitindo ajustar os recursos existentes para a obten&ccedil;&atilde;o dos melhores resultados.</p>     <p>&Eacute; ainda de referir que, tal como encontrado noutros trabalhos realizados em Portugal<sup>5,6</sup>, a preval&ecirc;ncia de c&aacute;rie em idade pr&eacute;&#8208;escolar foi elevada, verificando&#8208;se uma associa&ccedil;&atilde;o com a idade das crian&ccedil;as, mas n&atilde;o com o sexo.</p>     <p>&nbsp;</p>     <p><b>Limita&ccedil;&otilde;es do estudo</b></p>     <p>A inexist&ecirc;ncia de um grupo controlo enfraquece as conclus&otilde;es obtidas, pois n&atilde;o permite controlar outros fatores que possam ter atuado simultaneamente neste grupo de estudo, como a altera&ccedil;&atilde;o nos h&aacute;bitos alimentares, admitindo&#8208;se que a associa&ccedil;&atilde;o observada possa ter sido de menor magnitude. Apesar do referido, o desenho de estudo &eacute; adequado para avalia&ccedil;&otilde;es iniciais de interven&ccedil;&otilde;es comunit&aacute;rias, quando o conhecimento existente sugere a inexist&ecirc;ncia de varia&ccedil;&atilde;o de outros fatores, como acontece neste trabalho, dado o reduzido tempo de seguimento.</p>     ]]></body>
<body><![CDATA[<p>O elevado n&uacute;mero de perdas, correspondentes a uma escola em que n&atilde;o foi poss&iacute;vel efetuar o segundo momento de avalia&ccedil;&atilde;o (por indisponibilidade da escola), poder&aacute; ter condicionado a ocorr&ecirc;ncia de um vi&eacute;s de sele&ccedil;&atilde;o, embora a aus&ecirc;ncia de diferen&ccedil;as iniciais entre o grupo de crian&ccedil;as reavaliadas e n&atilde;o reavaliadas aponte para a inexist&ecirc;ncia do referido vi&eacute;s.</p>     <p>Pela raz&atilde;o de n&atilde;o ser objetivo prim&aacute;rio de estudo determinar a preval&ecirc;ncia de c&aacute;rie, o tamanho do grupo de estudo apenas permitiu estimar a preval&ecirc;ncia de c&aacute;rie com uma precis&atilde;o de cerca de 6%. Salienta&#8208;se, no entanto, que o tamanho do grupo de estudo, mesmo tendo em conta as perdas observadas, foi suficiente para detetar a varia&ccedil;&atilde;o do IP observada.</p>     <p>&nbsp;</p>     <p><b>Conclus&otilde;es</b></p>     <p>Este estudo demonstra ter havido uma redu&ccedil;&atilde;o significativa da placa bacteriana dent&aacute;ria em crian&ccedil;as em idade pr&eacute;&#8208;escolar que realizam a escovagem dent&aacute;ria em ambiente escolar, podendo contribuir para a redu&ccedil;&atilde;o do risco de desenvolver c&aacute;rie dent&aacute;rias.</p>     <p>Aponta&#8208;se a necessidade de avaliar a dura&ccedil;&atilde;o destes projetos, como forma de otimizar os recursos necess&aacute;rios para o seu desenvolvimento.</p>     <p>&nbsp;</p>     <p><b>Refer&ecirc;ncias bibliogr&aacute;ficas</b></p>     <!-- ref --><p>1. Arora A., Scott J., Bhole S., Do L., Schwarz E., Blinkhorn A. Early childhood feeding practices and dental caries in preschool children: A multi&#8208;centre birth cohort study. BMC Public Health. 2011;11:28.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=807361&pid=S0870-9025201600030000600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     ]]></body>
<body><![CDATA[<!-- ref --><p>2. Acharya S., Tandon S. The effect of early childhood caries on the quality of life of children and their parents. Contemp Clin Dent. 2011;2:98-1013.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=807363&pid=S0870-9025201600030000600002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>3. Alm A., Wendt L.K., Koch G., Birkhed D., Nilsson M. Caries in adolescence: Influence from early childhood. Community Dent Oral Epidemiol. 2011;40:125-33.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=807365&pid=S0870-9025201600030000600003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>4. Harris R., Nicoll A.D., Adair P.M., Pine C.M. Risk factors for dental caries in young children: A systematic review of the literature. Commun Dent Health. 2004;21(1 Suppl):71-85.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=807367&pid=S0870-9025201600030000600004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>5. Estudo de preval&ecirc;ncia de doen&ccedil;as orais em Portugal. Lisboa: DGS, (2008) .    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=807369&pid=S0870-9025201600030000600005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>6. Rodrigues A.P., Reis P. Escovagem dent&aacute;ria em ambiente escolar e c&aacute;rie dent&aacute;ria: um estudo de coorte. Rev Por Med Ger Fam. 2012;28:403-8.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=807371&pid=S0870-9025201600030000600006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     ]]></body>
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