<?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>1688-9339</journal-id>
<journal-title><![CDATA[Odontoestomatología]]></journal-title>
<abbrev-journal-title><![CDATA[Odontoestomatología]]></abbrev-journal-title>
<issn>1688-9339</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Odontología - Universidad de la República]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-93392015000100003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Postes colados: estudio clínico retrospectivo de 44 años en clínica privada especializada]]></article-title>
<article-title xml:lang="en"><![CDATA[Cast posts: a forty-four year retrospective clinical study in a specialized private practice]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borgia Botto]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barón]]></surname>
<given-names><![CDATA[Rosario]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borgia]]></surname>
<given-names><![CDATA[José L]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de la República Facultad de Odontología Carrera de Especialización en Odontología Restauradora Integral]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de la República Facultad de Odontología Cátedra Clínica de Operatoria Dental 2]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de la República Facultad de Odontología Clínica de Prostodoncia]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2015</year>
</pub-date>
<volume>17</volume>
<numero>25</numero>
<fpage>11</fpage>
<lpage>22</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-93392015000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-93392015000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-93392015000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Objetivo. El objetivo de este estudio fue examinar el resultado clínico longitudinal de dientes endodónticamente tratados, rehabilitados con postes colados y una restauración coronaria, durante 44 años. Materiales y Métodos. En 130 pacientes seleccionados al azar, 95 presentaron 297 dientes rehabilitados con un poste colado y una restauración coronaria. El criterio de éxito fue que el diente rehabilitado permaneciera funcional sin patología clínica ni radiográfica. Resultados: Doscientos sesenta y ocho (90%) estaban en función y 29 (10%) habían fracasado. El Indice Kappa de Cohen, fue de 0.78 - 1. Conclusiones. El éxito clínico fue de 90%. La sobrevida media observada de los dientes estudiados fue de 19 años. La tasa de fracaso fue de 10%, siendo la fractura dentaria la falla más prevalente (5% de todos los dientes restaurados).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Aim. The aim of this study was to examine the longitudinal clinical result of the use of cast posts and cores and crown restorations in endodontically treated teeth over a 44-year period. Materials and methods. Out of 130 randomly selected patients, 95 had had 297 teeth rehabilitated with cast posts and cores and crown restorations. The endodontic rehabilitation was considered successful when the tooth remained functional with no clinical or radiographic pathology. Results. The success rate was 90% (268) and the failure rate 10% (29). Cohen&rsquo;s Kappa index ranged between 0.78 and 1. Conclusions. In this 44-year retrospective study, the clinical success rate was 90%. The mean survival time of the studied teeth was 19 years. The failure rate was 10%; tooth fractures were the most prevalent failures (5% of all restored teeth).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Diente endodónticamente tratado]]></kwd>
<kwd lng="es"><![CDATA[anclaje radicular]]></kwd>
<kwd lng="es"><![CDATA[fractura dentaria]]></kwd>
<kwd lng="es"><![CDATA[bruxismo]]></kwd>
<kwd lng="es"><![CDATA[éxito clínico]]></kwd>
<kwd lng="en"><![CDATA[Endodontically treated teeth]]></kwd>
<kwd lng="en"><![CDATA[Root anchorage]]></kwd>
<kwd lng="en"><![CDATA[Tooth fracture]]></kwd>
<kwd lng="en"><![CDATA[Bruxism]]></kwd>
<kwd lng="en"><![CDATA[Clinical success]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <div class="" style="text-align: justify;"><font face="Verdana" size="4"><b><span class="Hiperv-nculo"><a id="x.62678">     Postes colados: estudio cl&iacute;nico retrospectivo de 44 a&ntilde;os en cl&iacute;nica privada      especializada </a></span></b></font><br />     &nbsp;<br />     <b><font face="Verdana"><span class="Hiperv-nculo"><a id="x.62678">Cast posts: a forty-four year retrospective clinical study in a specialized private practice</a></span></font></b><br />     <br />     <br />     <br />     <font face="Verdana" size="-1">Borgia Botto Ernesto <a href="#1.">*</a>, <br />     Bar&oacute;n Rosario<a href="#2.">**</a>, <br />     ]]></body>
<body><![CDATA[Borgia Jos&eacute; L.<a href="#3.">***</a></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><a id="x.62678"><span class="Hiperv-nculo"><br />     <br />     </span></a></font><font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-17"><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />     <span class=""></span></font>     <font class="" face="Verdana" size="-1"><span class="Hiperv-nculo"><a name="1."></a><a id="x.62678">*     Prof. Director de la Carrera de Especializaci&oacute;n en Odontolog&iacute;a     Restauradora Integral, Escuela de Graduados, Facultad de Odontolog&iacute;a,     Universidad de la Rep&uacute;blica. Uruguay.</a></span></font><font size="-1"><br />     ]]></body>
<body><![CDATA[</font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo">eborgiabotto@gmail.com</span></font><font size="-1"><br />     <br class="" />     <span class=""></span></font>     <font class="" face="Verdana" size="-1"><span class="Hiperv-nculo"><a name="2."></a><a id="x.62678">**	Prof.     Interino de la C&aacute;tedra Cl&iacute;nica de Operatoria Dental 2,     Facultad de Odontolog&iacute;a, Universidad de la Rep&uacute;blica.     Uruguay.</a></span></font><font size="-1"><span class="Hiperv-nculo"></span><br class="" />     <span class=""></span></font>     <font class="" face="Verdana" size="-1"><span class="Hiperv-nculo"><a name="3."></a><a id="x.62678">*** Prof.     ]]></body>
<body><![CDATA[Adjunto de la Cl&iacute;nica de Prostodoncia, Facultad de     Odontolog&iacute;a, Universidad de la Rep&uacute;blica. Uruguay.</a></span></font><font size="-1"><span class="Hiperv-nculo"></span><br />     <br />     <br />     <br />     </font>     <hr style="width: 100%; height: 2px;" /><font size="-1"><br />     &nbsp;<br />     </font>     <font face="Verdana" size="-1"><b><a id="x.62678">Resumen</a></b></font><font size="-1"><br />     ]]></body>
<body><![CDATA[</font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Objetivo.</a></span><span class="Hiperv-nculo"><a id="x.62678">     El objetivo de este estudio fue examinar el resultado cl&iacute;nico     longitudinal de dientes endod&oacute;nticamente tratados, rehabilitados con     postes colados y una restauraci&oacute;n coronaria, durante 44 a&ntilde;os. </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Materiales y</a></span><span class="Hiperv-nculo"><a id="x.62678"> </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">M&eacute;todos.</a></span><span class="Hiperv-nculo"><a id="x.62678">     En 130 pacientes seleccionados al azar, 95 presentaron 297 dientes     rehabilitados con un poste colado y una restauraci&oacute;n coronaria. El     criterio de &eacute;xito fue que el diente rehabilitado permaneciera funcional     sin patolog&iacute;a cl&iacute;nica ni radiogr&aacute;fica. </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Resultados:</a></span><span class="Hiperv-nculo"><a id="x.62678">     Doscientos sesenta y ocho (90%) estaban en funci&oacute;n y 29 (10%)     ]]></body>
<body><![CDATA[hab&iacute;an fracasado. El Indice Kappa de Cohen, fue de 0.78 - 1. </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Conclusiones. </a></span><span class="Hiperv-nculo"><a id="x.62678">El     &eacute;xito cl&iacute;nico fue de 90%. La sobrevida media observada de los dientes     estudiados fue de 19 a&ntilde;os. La tasa de fracaso fue de 10%, siendo la     fractura dentaria la falla m&aacute;s prevalente (5% de todos los dientes     restaurados). </a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><a id="x.62678">&nbsp;</a></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="char-style-override-19"><a id="x.62678">Palabras claves: </a></span><span class="Hiperv-nculo"><a id="x.62678">Diente endod&oacute;nticamente tratado,  anclaje radicular, fractura dentaria, bruxismo, &eacute;xito cl&iacute;nico.</a></span><span><a id="x.62678"> </a></span></font><font size="-1"><br />     </font>     ]]></body>
<body><![CDATA[<font face="Verdana" size="-1"><a id="x.62678">&nbsp;</a></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><b><a id="x.62678">Abstract</a></b></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Aim.</a></span><span class="Hiperv-nculo"><a id="x.62678">     The aim of this study was to examine the longitudinal clinical result     of the use of cast posts and cores and crown restorations in     endodontically treated teeth over a 44-year period. </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Materials and methods.</a></span><span class="Hiperv-nculo"><a id="x.62678">     Out of 130 randomly selected patients, 95 had had 297 teeth     rehabilitated with cast posts and cores and crown restorations. The </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">endodontic</a></span><span class="Hiperv-nculo"><a id="x.62678"> rehabilitation was considered successful when the tooth remained functional with no clinical or radiographic pathology. </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Results.</a></span><span class="Hiperv-nculo"><a id="x.62678"> The success rate was 90% (268) and the failure rate 10% (29). Cohen&rsquo;s Kappa index ranged between 0.78 and 1. </a></span><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">Conclusions.</a></span><span class="Hiperv-nculo"><a id="x.62678">     ]]></body>
<body><![CDATA[In this 44-year retrospective study, the clinical success rate was 90%.     The mean survival time of the studied teeth was 19 years. The failure     rate was 10%; tooth fractures were the most prevalent failures (5% of     all restored teeth).</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><a id="x.62678">&nbsp;</a></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="hps char-style-override-19"><a id="x.62678">Keywords</a></span><span class="short-text"><a id="x.62678">: </a></span><span class="Hiperv-nculo"><a id="x.62678">Endodontically treated teeth, Root anchorage, Tooth fracture, Bruxism, Clinical success.</a></span></font><font size="-1"><br />     <br />     <br />     ]]></body>
<body><![CDATA[<br />     <br />     </font>     <font face="Verdana" size="-1"><a id="x.62678">Fecha recibido: 25.02.15 - Fecha aceptado: 26.03.15<br />     <br />     <br />     <br />     <br />     <br />     </a></font>     ]]></body>
<body><![CDATA[<hr style="width: 100%; height: 2px;" /><font face="Verdana" size="-1"><a id="x.62678"><br />     </a></font><font face="Verdana" size="-1"><a id="x.62678">&nbsp;</a></font><font size="-1"><br />     <b><font face="Verdana"><span class="Hiperv-nculo char-style-override-20"><a id="x.62678">Introducci&oacute;n</a></span></font></b><span class="Hiperv-nculo char-style-override-21"></span><br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1">Los     dientes endod&oacute;nticamente tratados (DET) se encuentran a menudo     comprometidos estructuralmente, debido a varios factores (<a name="1a"></a><a href="#1">1</a>-<a name="4a"></a><a href="#4">4</a>).     La restauraci&oacute;n de los mismos con postes colados, permiten una     adecuada retenci&oacute;n para restauraciones coronarias individuales     ]]></body>
<body><![CDATA[&oacute; pilares de Pr&oacute;tesis Dentales Fijas (PDF) (<a name="5a"></a><a href="#5">5</a>,<a name="6a"></a><a href="#6">6</a>).<br />     El &eacute;xito de los postes colados var&iacute;a seg&uacute;n la     literatura, siendo las fallas biomec&aacute;nicas las m&aacute;s     comunes. El descementado de los postes y las fracturas dentarias son     los fracasos m&aacute;s frecuentes (<a name="7a"></a><a href="#7">7</a>-<a name="11a"></a><a href="#11">11</a>). Recidiva de caries y periodontitis periapical son menos prevalentes (<a name="9a"></a><a href="#9">9</a>,<a name="12a"></a><a href="#12">12</a>).<br />     Estudios cl&iacute;nicos longitudinales de m&aacute;s de 10 a&ntilde;os     son escasos. Cinco de esos estudios mostraron tasas de &eacute;xito     entre 55% y 94% (<a href="#9">9</a>, <a href="#11">11</a>-<a name="13a"></a><a href="#13">13</a>, <a name="59a"></a><a href="#59">59</a>).     Considerando los resultados de esas investigaciones y la falta de datos     de m&aacute;s larga data, podr&iacute;a ser de inter&eacute;s analizar     ]]></body>
<body><![CDATA[los resultados cl&iacute;nicos documentados durante 44 a&ntilde;os.<br />     El objetivo de esta investigaci&oacute;n retrospectiva, fue evaluar el     resultado cl&iacute;nico longitudinal de postes colados, utilizados en     la rehabilitaci&oacute;n de DET, realizados por el primer autor en su     cl&iacute;nica privada durante 44 a&ntilde;os.</font><font size="-1"><br />     <b><font face="Verdana"><span class="Hiperv-nculo"><a id="x.62678"><br />     <br />     </a></span></font></b></font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><span style="font-weight: bold;">Materiales y M&eacute;todos</span><br />     <br />     ]]></body>
<body><![CDATA[El Criterio de Inclusi&oacute;n de la muestra, fue que los pacientes a     ser evaluados, deb&iacute;an haber sido asistidos en el consultorio del     primer autor por un per&iacute;odo no menor a los 3 a&ntilde;os y     continuar concurriendo al mismo.<br />     De 2552 pacientes registrados, exclu&iacute;dos los que se     hab&iacute;an mudado o fallecido, 210 cumpl&iacute;an dicho requisito.     De &eacute;stos, 140 fueron seleccionados al azar por una asistente     dental que desconoc&iacute;a los objetivos de la selecci&oacute;n. Los     autores consideraron que esa muestra era adecuada. Los 140 pacientes     fueron invitados a participar en un examen cl&iacute;nico entre     ]]></body>
<body><![CDATA[noviembre de 2013 y abril de 2014: 130 concurrieron y 10 no lo hicieron     por razones personales. De los pacientes examinados, 95 ten&iacute;an o     hab&iacute;an tenido DET restaurados con un poste colado, totalizando     297 postes.<br />     Todos los procedimientos restauradores fueron llevados a cabo por un     &uacute;nico operador (el primer autor). Los co-autores participaron     como evaluadores independientes.<br />     La calibraci&oacute;n entre el operador y los evaluadores se     realiz&oacute; previamente, en 120 restauraciones coronarias,     independientes de la muestra. La evaluaci&oacute;n cualitativa de las     ]]></body>
<body><![CDATA[restauraciones se bas&oacute; en el criterio de Ryge <a name="14a"></a><a href="#14">(14)</a> modificado por los autores <a href="#t1">(Tabla 1)</a>. El Coeficiente Kappa de Cohen <a name="15a"></a><a href="#15">(15)</a> oscil&oacute; entre 0.78 y 1, excelente de acuerdo a la Gu&iacute;a de Fleiss <a name="16a"></a><a href="#16">(16)</a>.</span></font><font face="Verdana" size="-1"><span class="Hiperv-nculo"><br />     </span></font><font size="-1">&nbsp;</font></div>     <font size="-1"><br />     </font>     <div class="" style="text-align: justify;"><font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-19"></span></font><font size="-1"><a name="t1"></a><img style="width: 324px; height: 573px;" alt="" src="/img/revistas/ode/v17n25/25a03t1.jpg" /><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />     <br />     <br />     <br />     ]]></body>
<body><![CDATA[<br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1">Los     pacientes fueron examinados cl&iacute;nica y radiogr&aacute;ficamente.     Los datos de la Historia Cl&iacute;nica y del Examen Cl&iacute;nico     fueros registrados en una planilla de Excel especialmente     dise&ntilde;ada. En los casos de no concordancia en la     evaluaci&oacute;n de la calidad de las restauraciones, se     registr&oacute; la calificaci&oacute;n m&aacute;s baja.<br />     ]]></body>
<body><![CDATA[<br />     <br />     Los Criterios de Inclusi&oacute;n de los postes colados fueron:<br />     <br />     - El poste a evaluar deb&iacute;a haber estado en funci&oacute;n un     m&iacute;nimo de 2 a&ntilde;os, en piezas dentarias individuales o PDF.<br />     - Tener ex&aacute;menes radiogr&aacute;ficos de las piezas dentarias a evaluar, con una antig&uuml;edad menor a un a&ntilde;o.<br />     - Onlays de oro y Coronas Ceramo-met&aacute;licas con postes en una pieza, se evaluaron como postes colados.<br />     - Postes colados preexistentes, no realizados por el operador y que a     juicio del mismo pod&iacute;an ser conservados durante un retratamiento     ]]></body>
<body><![CDATA[coronario, se incluyeron desde el momento de la instalaci&oacute;n de     la nueva rehabilitaci&oacute;n.<br />     Los Criterios de &Eacute;xito de los Postes Colados fueron:<br />     - Que el DET rehabilitado con un poste colado y una restauraci&oacute;n     coronaria, se mantuviera cl&iacute;nicamente en funci&oacute;n, sin     patolog&iacute;a. .<br />     - Que al examen radiogr&aacute;fico el DET rehabilitado no presentara patolog&iacute;a periapical. </font>     <font size="-1"><br />     <br />     <br />     ]]></body>
<body><![CDATA[</font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">En     todas las preparaciones dentarias, el operador trat&oacute; de conservar el     m&aacute;ximo volumen posible de dentina coronaria, no tallar el conducto     radicular m&aacute;s de 1/3 del ancho mesio-distal de la ra&iacute;z, conservar como     m&iacute;nimo 4 mm. de remanente apical de la obturaci&oacute;n endod&oacute;ntica y     alcanzar una relaci&oacute;n corono-radicular del poste de 1-1 a 1-1.5,     siempre que fuera posible.</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Edad,     ]]></body>
<body><![CDATA[g&eacute;nero, examen radiogr&aacute;fico, distribuci&oacute;n en las arcadas dentarias,     tipo de cemento, recidiva de caries, h&aacute;bitos parafuncionales, terapia     de mantenimiento, &eacute;xitos, fracasos y sobrevida de los postes, fueron     las variables analizadas. </a></span></font><font size="-1"><span class="Hiperv-nculo" xml:lang="en-US"></span><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Para     el procesamiento de los datos se us&oacute; el programa Epidat 3.1     desarrollado por la Conseller&iacute;a de Sanidade de la Xunta de Galicia con     el apoyo de la OPS-OMS y el SPPS 13.0. En todos los casos, las     variables consideradas se tomaron como correspondientes a una variable     ]]></body>
<body><![CDATA[aleatoria independiente id&eacute;nticamente distribu&iacute;da, generada a partir de     una muestra probabil&iacute;stica. Un resultado es considerado     estad&iacute;sticamente significativo cuando al rechazar la hip&oacute;tesis nula la     probabilidad de error es inferior al 5%. La significancia estad&iacute;stica     fue de P&lt;0.05. Al analizar los valores completos y censurados, la     media y la mediana fueron usadas para describir la tendencia central.</a></span></font><font size="-1"><br />     </font>     <font style="font-weight: bold;" face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font style="font-weight: bold;" face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     <br />     Resultados</a></span></font><font size="-1"><br />     ]]></body>
<body><![CDATA[<br />     La muestra estuvo constitu&iacute;da por 70 mujeres y 25 hombres, en     una relaci&oacute;n de 2.8 mujeres por hombre. La edad mediana de las     mujeres fue de 67 a&ntilde;os (rango de 40 a 80) y 69 en hombres (rango     de 42 a 71), sin diferencia estad&iacute;sticamente significativa entre     los sexos. El tiempo promedio de asistencia de estos pacientes al     consultorio fue de 27 a&ntilde;os (entre 3 y 44 a&ntilde;os).<br />     De los 297 postes colados, 268 (90%) estaban en funci&oacute;n.     Veintinueve (10%) fracasaron: 19 en dientes individuales y 10 en     pilares de PDF. El n&uacute;mero y las causas de fracasos se muestran     ]]></body>
<body><![CDATA[en la <a href="#f1">Fig. 1</a>. Veintis&eacute;is dientes (9%) se perdieron.<br />     &nbsp;<br />     <br />     <br />     <br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-19" xml:lang="en-US"><span><a id="x.62678"><img class="frame-20" src="file:///C:/Scielo/Serial/ode/v17n25/html/Nueva%20carpeta/revista-25-web-resources/image/62888.png" alt="62888.png" /></a></span></span><span class="Hiperv-nculo char-style-override-25" xml:lang="en-US"><a name="f1"></a><img style="width: 437px; height: 284px;" alt="" src="/img/revistas/ode/v17n25/25a03g1.jpg" /><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Fig     ]]></body>
<body><![CDATA[1 Causas y n&uacute;mero de fracasos (end. = endod&oacute;ntico;     rec.=recidiva; reabs.=reabsorci&oacute;n; rad. = radicular).</a></span></font><font size="-1"><br />     <br />     <br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">El     examen radiogr&aacute;fico mostr&oacute; tres im&aacute;genes periapicales radiol&uacute;cidas en 3     pacientes. Fueron consideradas no patol&oacute;gicas pues no presentaros     variaciones macrosc&oacute;picas durante 9, 21 y 23 a&ntilde;os respectivamente </a></span><span class="Hiperv-nculo char-style-override-22"><a id="x.62678">17</a></span><span class="Hiperv-nculo"><a id="x.62678">.     ]]></body>
<body><![CDATA[Es de hacer notar, que 3 procesos cr&oacute;nicos periapicales     cicatrizaron luego de ser tratados mediante apicectom&iacute;as.</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">En     los dientes en funci&oacute;n se encontr&oacute; una recidiva de caries (0.4%), que     fue tratada conserv&aacute;ndose la restauraci&oacute;n coronaria original.</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Los     22 postes colados preexistentes se mantuvieron en funci&oacute;n, pero no se     pudo determinar con precisi&oacute;n el tipo de aleaci&oacute;n que hab&iacute;a sido     ]]></body>
<body><![CDATA[utilizada. Los otros 246 en funci&oacute;n, hechos por el operador, fueron     colados en aleaciones de oro tipo III o en aleaciones nobles de     plata-paladio-oro. Todos fueron cementados con cemento de fosfato de     zinc; uno se descement&oacute; (0.4%), instal&aacute;ndose otro nuevo.</a></span></font><font size="-1"><br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Al     momento de la evaluaci&oacute;n, dos coronas de porcelana aluminosa en el     mismo paciente, con una sobrevida de 38 a&ntilde;os y 7 meses, fracturaron y     fueron reemplazadas por dos coronas cer&aacute;micas libres de metal pero     ]]></body>
<body><![CDATA[manteniendo los postes existentes.</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1"><br />     Las 266 restauraciones coronarias en funci&oacute;n se distribuyeron de     la siguiente manera: 189 restauraciones individuales, 65 pilares de PDF     y 12 restauraciones corono-radiculares en una pieza (8 onlays de oro     tipo III y 4 coronas ceramo-met&aacute;licas en aleaciones de     plata-paladio y oro-paladio). La calidad de estas restauraciones,     seg&uacute;n el criterio de Ryge modificado, se presenta en la <a href="#t2">Tabla 2</a>.     El an&aacute;lisis combinado de la calidad de cada restauraci&oacute;n,     ]]></body>
<body><![CDATA[mostr&oacute; que 255 (95%) alcanzaron niveles de aceptaci&oacute;n     cl&iacute;nica (calificaci&oacute;n Alfa o Bravo en adaptaci&oacute;n     marginal, pigmentaci&oacute;n marginal y superficie).<br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font>     </div>     <font size="-1"><br />     <br />     ]]></body>
<body><![CDATA[</font>     <div class="" style="text-align: justify;"><font size="-1"><span class="Hiperv-nculo char-style-override-19"></span></font><font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">La longevidad de los 297 postes estuvo en un rango de 31 meses (2 a&ntilde;os,7meses) y 532 meses (44 a&ntilde;os,4meses).</a></span></font><font size="-1"><br />  <br />  <br />  <a name="t2"></a><img style="width: 325px; height: 179px;" alt="" src="/img/revistas/ode/v17n25/25a03t2.jpg" /><br />  </font>            <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     <br />     </a></span></font><font size="-1">La sobrevida observada de los postes colados fue:<br />     - Los 268 postes en funci&oacute;n presentaron una sobrevida mediana de 231 meses (19 a&ntilde;os, 3 meses) y el cuartil superior de 388 meses (32 a&ntilde;os, 4 meses). El 49% tiene m&aacute;s de 20 a&ntilde;os en funci&oacute;n, el 32% entre 10 y 20 a&ntilde;os y el 19% menos de 10 a&ntilde;os <a href="#f2">(Fig. 2)</a>.<br />  <br />  <a name="f2"></a><img style="width: 437px; height: 279px;" alt="" src="/img/revistas/ode/v17n25/25a03g2.jpg" /><br />  </font>         <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Fig. 2  N&uacute;mero y sobrevida de los postes colados en funci&oacute;n</a></span></font><font size="-1"><br />  <br />  <br />  </font>         <font face="Verdana" size="-1"><span class="Hiperv-nculo"><br />     - Los 29 postes que fracasaron tuvieron una sobrevida mediana de 208 meses (17 a&ntilde;os,4 meses) y el cuartil superior de 282 meses (23 a&ntilde;os,6 meses). De las 14 fracturas dentarias, 43% tuvo una sobrevida entre 20 y 28 a&ntilde;os, 36% entre 10 y 20 a&ntilde;os y 21% menos de 10 a&ntilde;os <a href="#f3">(Fig. 3)</a>.</span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><span><a id="x.62678"><img class="frame-25" src="file:///C:/Scielo/Serial/ode/v17n25/html/Nueva%20carpeta/revista-25-web-resources/image/62921.png" alt="62921.png" /></a></span><a id="x.62678"><br />     <br />     <br />     </a><a name="f3"></a><img style="width: 437px; height: 332px;" alt="" src="/img/revistas/ode/v17n25/25a03g3.jpg" /><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"> Fig. 3  Sobrevida de las 14 fracturas dentarias</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     <br />     </a></span></font><font size="-1">No hubo diferencia estad&iacute;sticamente significativa en la sobrevida de postes colados entre hombres y mujeres (Test Log-Rank de Mantel-Cox &ldquo;P&rdquo; = 0.54).<br />     La distribuci&oacute;n de los 297 postes colados en las arcadas dentarias se presenta en la <a href="#f4">Fig. 4</a>. Los dientes antero-inferiores y los premolares inferiores fueron los menos tratados, pero la distribuci&oacute;n fue similar en los dem&aacute;s grupos dentarios.<br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-28" xml:lang="en-US"><span><a id="x.62678"><img class="frame-20" src="file:///C:/Scielo/Serial/ode/v17n25/html/Nueva%20carpeta/revista-25-web-resources/image/62933.png" alt="62933.png" /></a></span><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     </a><a name="f4"></a><img style="width: 437px; height: 282px;" alt="" src="/img/revistas/ode/v17n25/25a03g4.jpg" /><br />     <a id="x.62678">Fig. 4  Distribuci&oacute;n en las arcadas dentarias de los 297 postes colados</a></span></font><font size="-1"><br />  <br />  <br />  </font>         <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1">De las 14 fracturas dentarias , 5 ocurrieron en dientes antero-superiores, 5 en premolares superiores y 4 en molares, 2 en cada arcada dentaria.<br />     En el momento de la evaluaci&oacute;n, 20 pacientes asintom&aacute;ticos ten&iacute;an facetas de desgaste parafuncionales (la actividad del bruxismo no fue evaluada); 26 usaban placas oclusales de estabilizaci&oacute;n debido a bruxismo nocturno; 6 estaban siendo tratados por signos y s&iacute;ntomas de Des&oacute;rdenes T&eacute;mporo Mandibulares (DTM) con dispositivos oclusales y otras terapias y 17 hab&iacute;an estado en tratamiento por bruxismo.<br />     Si estos cuatro grupos de pacientes se consideraran juntos, 69 (73%) de los 95 pacientes, en el per&iacute;odo observado, tienen o tuvieron historia de parafunci&oacute;n. Los postes colados en pacientes con parafunci&oacute;n tuvieron una sobrevida menor estad&iacute;sticamente significativa (Test Log-Rank de Mantel-Cox &ldquo;P&rdquo; = 0.020) <a href="#f5">(Fig. 5)</a>. <br />  <br />  <br />  <br />  </font>            <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><span><a id="x.62678"><img class="frame-26" src="file:///C:/Scielo/Serial/ode/v17n25/html/Nueva%20carpeta/revista-25-web-resources/image/Imagen62944_fmt.png" alt="Imagen62944.PNG" /></a></span><a name="f5"></a><img style="width: 437px; height: 327px;" alt="" src="/img/revistas/ode/v17n25/25a03g5.jpg" /><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Fig. 5  Comparaci&oacute;n de sobrevida de los postes colados entre pacientes brux&oacute;manos y no brux&oacute;manos</a></span></font><font size="-1"><br />  <br />  </font>      <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1">La sobrevida de los postes colados se ajusta a un modelo de regresi&oacute;n log&iacute;stica multivariado de Cox <a href="#t3">(Tabla 3)</a>, siendo g&eacute;nero, edad, bruxismo y mantenimiento las variables explicatorias (Test &oacute;mnibus de Chi-cuadrado &ldquo;P&rdquo; = 0.01). A mayor edad del paciente, menor tasa de sobrevida del DET. Las mujeres presentaron mayor tasa de sobrevida que los hombres.<br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font>                                                                        </div>     <font size="-1"><br />  </font>       <div class="" style="text-align: justify;"><font size="-1"><span class="Hiperv-nculo char-style-override-31"></span></font><font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1"><a name="t3"></a><img style="width: 500px; height: 118px;" alt="" src="/img/revistas/ode/v17n25/25a03t3.jpg" /><br />  <br />  <br />  <br />  </font>            <font face="Verdana" size="-1"><span class="Hiperv-nculo">Las tasas de sobrevida de los postes colados ajustan con un modelo m&aacute;s simple de regresi&oacute;n log&iacute;stica de Cox <a href="#t4">(Tabla 4)</a> siendo bruxismo y mantenimiento las variables explicatorias (Test &oacute;mnibus de Chi-cuadrado &ldquo;P &ldquo;=0.009).<br />     <br />     <br />     </span></font></div>     <font size="-1"><a name="t4"></a><img style="width: 500px; height: 80px;" alt="" src="/img/revistas/ode/v17n25/25a03t4.jpg" /><br />  </font>       <div class="" style="text-align: justify;"><font size="-1"><span class="Hiperv-nculo char-style-override-31"></span></font><font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Por lo tanto, hubo una relaci&oacute;n estad&iacute;sticamente significativa entre bruxismo y la sobrevida del DET, tanto a nivel univariado (Test de Mantel-Cox &ldquo;P&rdquo; = 0.02) como multivariado (modelo de regresi&oacute;n de Cox &ldquo;P&rdquo; =0.047). La probabilidad de una menor sobrevida de DET en pacientes con bruxismo, fue 3.37 veces mayor que en pacientes sin bruxismo.</a></span></font><font size="-1"><br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">S&oacute;lo 37 (39%) pacientes recibieron terapia de mantenimiento, al menos una vez al a&ntilde;o. En pacientes sin mantenimiento los DET mostraron una mayor tasa de sobrevida (&ldquo;P&rdquo; = 0.055) que aquellos que tuvieron mantenimiento peri&oacute;dico. Sin embargo, de las 14 fracturas registradas, 9 ocurrieron en DET sin mantenimiento (OR=1.17). Los DET de pacientes con bruxismo que no hab&iacute;an tenido mantenimiento, tuvieron 1.59 m&aacute;s posibilidades de presentar fracturas (Riesgo relativo 1.59 IC 95% 1.05 - 2.41). </a></span></font><font size="-1"><br />  <br />  <br />  </font>         <font style="font-weight: bold;" face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Discusi&oacute;n</a></span></font><font size="-1"><br />  <br />  </font>      <font face="Verdana" size="-1"><span class="Hiperv-nculo">Este estudio retrospectivo de 44 a&ntilde;os de DET, restaurados con un poste colado y una restauraci&oacute;n coronaria, mostr&oacute; un &eacute;xito de 90% con una sobrevida media de 19 a&ntilde;os. Considerando el largo per&iacute;odo de observaci&oacute;n, estos resultados pueden considerarse muy buenos si se los compara con otros estudios cl&iacute;nicos internacionales <a href="#t5">(Tabla 5)</a>. Un estudio present&oacute;, despu&eacute;s de 15 a&ntilde;os, una tasa de &eacute;xito de 55%</span><span class="Hiperv-nculo char-style-override-22"><a id="x.62678">&nbsp;</a></span><a href="#9" id="x.62678"><span class="Hiperv-nculo">(9)</span></a><span class="Hiperv-nculo char-style-override-22"><a id="x.62678">  </a></span><span class="Hiperv-nculo"><a id="x.62678">y tres estudios de 10 a&ntilde;os, tasas de &eacute;xito de 83%</a></span><span class="Hiperv-nculo char-style-override-22"><a id="x.62678"> </a></span><span class="Hiperv-nculo"><a id="x.62678">(59) a 94%</a></span><span class="Hiperv-nculo char-style-override-22"><a id="x.62678"> </a></span><span class="Hiperv-nculo"></span></font><font size="-1">&nbsp;(<a href="#11">11</a>,<a href="#13">13</a>).<br />  </font>   <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">&nbsp;</a></span></font>                        </div>     <font size="-1"><br />  </font>       <div class="" style="text-align: justify;"><font size="-1"><span class="Hiperv-nculo"></span></font><font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1"><br />     <a name="t5"></a><img style="width: 317px; height: 425px;" alt="" src="/img/revistas/ode/v17n25/25a03t5.jpg" /><br />     <br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Al     ]]></body>
<body><![CDATA[considerar las fuerzas oclusales, el g&eacute;nero podr&iacute;a ser una variable     relacionada a la integridad del DET rehabilitado. En efecto, se ha     reportado que las m&aacute;ximas fuerzas oclusales desarrolladas por las     mujeres ser&iacute;an de 597N, significativamente menores que las de los     hombres que alcanzan 847N. Cincuenta y cinco por ciento de estas     fuerzas son ejercidas a nivel de segundos molares, reduci&eacute;ndose 20% a     nivel de incisivos. Sin embargo, en pacientes masculinos con h&aacute;bitos     parafuncionales, las fuerzas pueden ser de 911N en los molares y de     597N en los incisivos</a></span><span class="Hiperv-nculo char-style-override-22"><a id="x.62678"> </a></span><span class="Hiperv-nculo"><a name="18a"></a><a href="#18" id="x.62678">(18).</a></span></font><font size="-1"><br />     <br />     ]]></body>
<body><![CDATA[Algunas pocas investigaciones examinaron edad, g&eacute;nero, bruxismo y terapia de mantenimiento (<a href="#9">9</a>, <a href="#12">12</a>,<a name="19a"></a><a href="#19">19</a>,<a name="20a"></a><a href="#20">20</a>).     En esta investigaci&oacute;n, el an&aacute;lisis estad&iacute;stico     mostr&oacute; que la edad, g&eacute;nero, bruxismo y mantenimiento, con     diferentes valores de asociaci&oacute;n, estuvieron relacionados con la     sobrevida de DET rehabilitados con un poste colado en aleaci&oacute;n     noble o de oro y una restauraci&oacute;n coronaria.<br />     <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font><font size="-1"><br />     En un estudio seccional cruzado en Uruguay, para determinar la     ]]></body>
<body><![CDATA[prevalencia de DTM y bruxismo, se observ&oacute; que la prevalencia de     bruxismo activo fue de 31%. La prevalencia en mujeres fue fuertemente     predominante <a name="21a"></a><a href="#21">(21)</a>. Otros estudios epidemiol&oacute;gicos de DTM mostraron resultados comparables <a name="22a"></a><a href="#22">(22)</a>.<br />     <br />     En la presente investigaci&oacute;n, la prevalencia de bruxismo activo     fue de 27%, lo que est&aacute; en relativa concordancia con los     trabajos antes mencionados. De acuerdo a los datos previamente     presentados, 69 de los 95 pacientes (73%), en el per&iacute;odo     observado, tienen o tuvieron historia de parafunci&oacute;n.<br />     <br />     ]]></body>
<body><![CDATA[Las intensidad de las fuerzas causadas por la parafunci&oacute;n pueden     ser un factor de riesgo para la integridad de los DET rehabilitados con     un poste colado y una restauraci&oacute;n coronaria. De hecho, 12 de     las 14 fracturas radiculares, ocurrieron en pacientes diagnosticados     con bruxismo activo. Por otra parte, cinco fracturas fueron en     premolares superiores y cinco en dientes antero-superiores, lo que     podr&iacute;a sugerir que el tipo de diente, su ubicaci&oacute;n en la     arcada dentaria y fuerzas parafuncionales no axiales, podr&iacute;an     ser factores de riesgo de fractura dentaria.<br />     <br />     ]]></body>
<body><![CDATA[El uso de postes ha decrecido en los &uacute;ltimos a&ntilde;os. En     muchos DET, con remanente dentario coronario, es posible instalar     restauraciones mediante t&eacute;cnicas adhesivas, sin la necesidad de     anclaje radicular <a name="23a"></a><a href="#23">(23)</a>. Estudios de laboratorio (<a name="24a"></a><a href="#24">24</a>-<a name="30a"></a><a href="#30">30</a>) y cl&iacute;nicos sustentan estos procedimientos <a name="31a"></a><a href="#31">(31</a>,<a name="32a"></a><a href="#32">32)</a>     . Algunos estudios cl&iacute;nicos de DET, con una restauraci&oacute;n     coronaria total, con o sin poste, mostraron resultados similares cuando     exist&iacute;a un buen volumen de remanente dentario coronario (<a href="#5">5</a>,<a name="8a"></a><a href="#8">8</a>,<a name="40a"></a><a href="#40">40</a>,<a name="41a"></a><a href="#41">41</a>).     Por lo tanto, el remanente dentario coronario y el tipo de     restauraci&oacute;n, podr&iacute;an ser m&aacute;s importantes que el     poste. Sin embargo, son necesarias m&aacute;s investigaciones     ]]></body>
<body><![CDATA[cl&iacute;nicas de mayor longevidad.<br />     Por otra parte, estudios de laboratorio han demostrado que la mejor     protecci&oacute;n contra la fractura es la presencia de 2mm. o     m&aacute;s de dentina coronaria, lo que permite el &ldquo;efecto     ferrule o abrazadera&rdquo; <a name="33a"></a><a href="#33">(33)</a>. Un remanente coronario uniforme de 2mm. de altura es m&aacute;s importante que la longitud del poste <a name="34a"></a><a href="#34">(34</a>,<a name="35a"></a><a href="#35">35)</a> y m&aacute;s importante que el largo del poste y el tipo de cemento utilizado <a name="36a"></a><a href="#36">(36)</a>.     Cuando el remanente dentario coronario no es uniforme, la     ubicaci&oacute;n y el volumen del mismo influencia la resistencia a la     fractura <a name="37a"></a><a href="#37">(37</a>,<a name="38a"></a><a href="#38">38)</a>. La posibilidad de recubrir el remanente coronario con el poste colado, aumenta la resistencia a la fractura en 30% <a name="39a"></a><a href="#39">(39)</a>.<br />     <br />     Cinco estudios cl&iacute;nicos prospectivos <a href="#8">(8</a>, <a href="#13">13</a>, <a href="#40">40</a>-<a name="42a"></a><a href="#42">42</a>) , tres retrospectivos (<a href="#9">9</a>,<a href="#12">12</a>,<a name="43a"></a><a href="#43">43</a>) y una revisi&oacute;n <a name="44a"></a><a href="#44">(44)</a>     ]]></body>
<body><![CDATA[, concluyeron que el remanente dentario coronario fue el factor de     mayor predecibilidad en el &eacute;xito longitudinal del DET     restaurado. Esta variable tan importante, no pudo ser evaluada     cient&iacute;ficamente en la presente investigaci&oacute;n ya que el     remanente coronario de cada diente no fue registrado. Sin embargo, el     buen suceso cl&iacute;nico pudo estar relacionado a que hubo un solo     operador <a name="45a"></a><a href="#45">(45)</a> y que el mismo tuvo siempre como objetivo, conservar el m&aacute;ximo posible de estructura dentaria. <br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><br />     <br />     ]]></body>
<body><![CDATA[La resistencia adhesiva de postes de fibra, en estudios de laboratorio,     fue equivalente a postes colados cementados adhesivamente o     convencionalmente (<a href="#36">36</a>,<a name="46a"></a><a href="#46">46</a>). Postes colados presentaron mayores valores de retenci&oacute;n cementados con fosfato de zinc que con cementos resinosos (<a name="47a"></a><a href="#47">47</a>,<a name="48a"></a><a href="#48">48</a>).<br />     Donovan y Cho <a name="49a"></a><a href="#49">(49)</a> consideran de     elecci&oacute;n al cemento de fosfato de zinc, para cementar postes     colados, incrustaciones met&aacute;licas y coronas     metal-cer&aacute;micas. En esta investigaci&oacute;n, los postes     colados se cementaron con cemento de fosfato de zinc y s&oacute;lo uno     se descement&oacute;, lo que avalar&iacute;a la opini&oacute;n de estos     autores.<br />     ]]></body>
<body><![CDATA[<br />     En varios estudios cl&iacute;nicos, el descementado de los postes     colados y las fracturas dentarias fueron las causas m&aacute;s     frecuentes de fracaso (<a href="#7">7</a>-<a href="#11">11</a>) , mientras que caries y periodontitis fueron menos prevalentes (<a href="#9">9</a>,<a href="#12">12</a>).     En este estudio, casi la mitad de los fracasos (48%) fueron fracturas     dentarias, mientras que descementado y caries fueron muy infrecuentes.<br />     <br />     Las fracturas podr&iacute;an estar relacionadas a la ubicaci&oacute;n     del DET en el arco dentario, presencia y ubicaci&oacute;n del remanente     dentario coronario, espesor de la pared radicular, fuerzas     ]]></body>
<body><![CDATA[parafuncionales, m&oacute;dulo de elasticidad del poste colado y la     falta de control oclusal funcional peri&oacute;dico. Adem&aacute;s, la     p&eacute;rdida del tejido pulpar reduce la propiocepci&oacute;n,     aumentado el riesgo de sobrecargas y fracturas (<a name="50a"></a><a href="#50">50</a>-<a name="52a"></a><a href="#52">52</a>) .<br />     <br />     Por otra parte, algunos investigadores consideran m&aacute;s importante el dise&ntilde;o oclusal que el tipo de poste (<a href="#19">19</a>,<a href="#20">20</a>).<br />     Estudios de laboratorio mostraron que en premolares     endod&oacute;nticamente tratados, con preparaciones MOD, inlays     cer&aacute;micos adheridos no reforzaron las estructuras dentarias     remanentes (<a name="28a"></a><a href="#28">28</a>,<a name="53a"></a><a href="#53">53</a>)     ]]></body>
<body><![CDATA[, mientras que premolares endod&oacute;nticamente tratados, con     preparaciones MOD, aumentaron la resistencia a la fractura del     remanente dentario mediante onlays colados adheridos (<a name="25a"></a><a href="#25">25</a>,<a name="29a"></a><a href="#29">29</a>).<br />     <br />     El dise&ntilde;o de la preparaci&oacute;n dentaria y el tipo de     restauraci&oacute;n pudieron influenciar el &eacute;xito     cl&iacute;nico. De los DET en funci&oacute;n en este trabajo, 181     recibieron una restauraci&oacute;n coronaria total la que rodea     totalmente la estructura dentaria; las 87 restauraciones coronarias     parciales posteriores fueron 82 onlays colados de oro y 5 onlays     ]]></body>
<body><![CDATA[cer&aacute;micos adheridos, los cuales transmiten fundamentalmente     fuerzas compresivas al diente <a name="27a"></a><a href="#27">(27)</a>.     Por otra parte, el buen resultado en la evaluaci&oacute;n de la calidad     de estas restauraciones, de acuerdo a algunos investigadores <a name="54a"></a><a href="#54">(54</a>-<a name="57a"></a><a href="#57">57</a>),     pudo haber incidido en el &eacute;xito del tratamiento     endod&oacute;ntico y por lo tanto en los DET rehabilitados con postes     colados.<br />     <br />     El porcentaje de sobrevida de los DET restaurados individualmente fue     de 91% y para pilares de PDF de 84%, lo que estar&iacute;a indicando un     ]]></body>
<body><![CDATA[mayor riesgo de fracaso para pilares de PDF endod&oacute;nticamente     tratados. Estos resultados son similares al meta-an&aacute;lisis de la     revisi&oacute;n sistem&aacute;tica realizada por Ploumaki et al <a name="58a"></a><a href="#58">(58)</a> que mostr&oacute; una tasa de &eacute;xito de 92% para DET restaurados individuales y de 79% para pilares de PDF.<br />     <br />     De acuerdo a los resultados de esta investigaci&oacute;n, puede     esperarse una larga sobrevida de los DET rehabilitados con postes     colados en aleaciones nobles o de oro y una restauraci&oacute;n     coronaria, pero varios factores deben ser considerados para lograr un     buen nivel de &eacute;xito cl&iacute;nico.<br />     <br />     ]]></body>
<body><![CDATA[<br />     </span></font><font style="font-weight: bold;" face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Conclusiones</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     En     este estudio retrospectivo de 44 a&ntilde;os, el &eacute;xito cl&iacute;nico de DET     rehabilitados con postes colados en aleaciones nobles o de oro y una     restauraci&oacute;n coronaria fue alto: 90% con una sobrevida media de 19     a&ntilde;os. La tasa de fracaso fue de 10%. La fractura dentaria fue la falla     m&aacute;s prevalente (5% de todos los dientes restaurados y 48% de los     ]]></body>
<body><![CDATA[fracasos), mientras que recidiva de caries y descementado fueron muy     bajos.</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     Esta     investigaci&oacute;n demostr&oacute; que el &eacute;xito cl&iacute;nico de los postes colados, en     aleaciones nobles o de oro, es multifactorial y que estad&iacute;sticamente el     cl&iacute;nico debe tener en cuenta una serie de variables que pueden incidir     en el mismo.</a></span></font><font size="-1"><br />     </font>     ]]></body>
<body><![CDATA[<font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     <br />     Agradecimientos</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Al Profesor Em&eacute;rito Dr. Gunnar E. Carlsson por sus comentarios y sugerencias en relaci&oacute;n al manuscrito.</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-19"><a id="x.62678">&nbsp;</a></span></font><font size="-1"><br />     </font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo char-style-override-19"><a id="x.62678"><br />     Conflictos de inter&eacute;s.</a></span><span class="Hiperv-nculo"><a id="x.62678"> </a></span></font><font size="-1"><br />     ]]></body>
<body><![CDATA[</font>     <font face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678">Los autores declaran no tener conflictos de inter&eacute;s relacionados con esta investigaci&oacute;n.</a></span></font><font size="-1"><br />     </font>     <font style="font-weight: bold;" face="Verdana" size="-1"><span class="Hiperv-nculo"><a id="x.62678"><br />     <br />     Referencias</a></span></font></div>     <ol class="" style="text-align: justify;">       <font face="Verdana" size="-1"><span class="Hiperv-nculo"></span></font>     </ol>         <!-- ref --><div class="" style="text-align: justify;"> 	<font face="Verdana" size="-1"><span class="char-style-override-16"><a name="1"></a><a href="#1a">1</a>. Reeh ES, Messer HH, Douglass WH. Reduction in tooth stiffness as a result of endodontic and restorative procedures. J Endod 1989;15:512-516.    <!-- ref --><br />     <a name="2"></a><a href="#1a">2</a>. Jameson MW, Hood JA, Tidmarsh BG. 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