<?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>1665-1146</journal-id>
<journal-title><![CDATA[Boletín médico del Hospital Infantil de México]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Med. Hosp. Infant. Mex.]]></abbrev-journal-title>
<issn>1665-1146</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud, Hospital Infantil de México Federico Gómez]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-11462006000500004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prótesis auricular externa e implantes osteointegrados: una opción quirúrgica para el tratamiento de deformidades auriculares]]></article-title>
<article-title xml:lang="en"><![CDATA[Prosthetic reconstruction with osseointegrated implants: the best option for auricular reconstruction. Preliminary report]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-González]]></surname>
<given-names><![CDATA[Araceli]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Dosal]]></surname>
<given-names><![CDATA[Marcia R.]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Isaak-García]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Martínez]]></surname>
<given-names><![CDATA[Marcos]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Nacional de Pediatría Departamento de Cirugía Plástica y Reconstructiva ]]></institution>
<addr-line><![CDATA[México, D.F. ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2006</year>
</pub-date>
<volume>63</volume>
<numero>5</numero>
<fpage>307</fpage>
<lpage>313</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462006000500004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462006000500004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462006000500004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción. El pabellón auricular es una estructura sofisticada y compleja. La presentación clínica más frecuente de deformidades es la microtia. Los métodos reconstructivos tienen como objetivo reproducir los relieves naturales de la oreja, con resultados estéticos variables. Material y métodos. Pacientes con microtia que acudieron a consulta externa en el período del año 2002 al 2004. Se diseñó la prótesis auricular tomando el modelo de la oreja normal; en caso de microtia bilateral, de un familiar. Se realizó colocación de implantes osteointegrados. Posterior a 6 meses, se colocaron los tornillos de cicatrización para fijación de la prótesis. Resultados. Se incluyeron 34 pacientes con microtia, 20 masculinos y 14 femeninos; edad promedio: 9.5 años. La presentación clínica más frecuente fue microtia unilateral (n =31). Tiempo quirúrgico promedio: 35 min. Se observó adecuada integración de implantes en los pacientes. El resultado estético fue muy satisfactorio. En el seguimiento (1.5 años) se encontró un paciente con cicatrización hipertrófica, ninguna complicación asociada al uso de prótesis ni necesidad de recambio protésico. Conclusiones. La utilización de prótesis auriculares externas e implantes osteointegrados es un método reconstructivo eficiente, con poca morbilidad y excelente resultado estético.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction. The external ear is a sophisticated and complex structure. The most frequent congenital ear deformity is microtia. The different reconstructive methods are focused in reproducing the natural reliefs of the ear, with different aesthetics results. Material and methods. Microtia patients who were seen between 2002 to 2004. The external prosthetic device was designed taking the pattern of the normal ear. In patients with bilateral microtia the ear pattern of a family member was used. Placements of the osseointegrated implants was carried out, and after 6 months of integration the scarring screws were placed in order fix de prosthesis Results. Thirty four microtia patients were included, 20 were males, the median age was 9.5 years. The most frequent clinical presentation was unilateral microtia (n =31). The surgical time for the procedure averaged: 35 min. All patients had appropriate integration of the implant. The aesthetic result of the prosthetic reconstruction was very satisfactory. In the follow-up period (1.5 years) we found an hypertrophic scar in 1 patient, no complications were associated to the use of prosthetic reconstruction and no patient required prosthetic replacement. Conclusions. The prosthetic reconstruction with osseointegrated implants is an efficient reconstructive method, with little morbidity and excellent aesthetic result.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Microtia]]></kwd>
<kwd lng="es"><![CDATA[prótesis auriculares externas]]></kwd>
<kwd lng="es"><![CDATA[implantes osteointegrados]]></kwd>
<kwd lng="es"><![CDATA[reconstrucción auricular]]></kwd>
<kwd lng="en"><![CDATA[Microtia]]></kwd>
<kwd lng="en"><![CDATA[prosthetic reconstruction]]></kwd>
<kwd lng="en"><![CDATA[osseointegrated implants]]></kwd>
<kwd lng="en"><![CDATA[auricular reconstruction]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Art&iacute;culo original</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Pr&oacute;tesis auricular externa e implantes osteointegrados: una opci&oacute;n quir&uacute;rgica para el tratamiento de deformidades auriculares</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="3"><b>Prosthetic reconstruction with osseointegrated implants: the best option for auricular reconstruction. Preliminary report</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Dra. Araceli P&eacute;rez&#150;Gonz&aacute;lez, Dra. Marcia R. P&eacute;rez&#150;Dosal, Dr. Jes&uacute;s Isaak&#150;Garc&iacute;a, Dr. Marcos Gonz&aacute;lez&#150;Mart&iacute;nez</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Servido de Cirug&iacute;a Pl&aacute;stica y Reconstructiva del Instituto Nacional de Pediatr&iacute;a, M&eacute;xico</i>, D. F., M&eacute;xico.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Solicitud de sobretiros:    <br> </b><i>Dra. Araceli P&eacute;rez Gonz&aacute;lez    <br> Depto. de Cirug&iacute;a Pl&aacute;stica y Reconstructiva, Instituto Nacional de Pediatr&iacute;a    <br> Insurgentes Sur 3700&#150;C, Col. Insurgentes Cuicuilco, Deleg. Coyoac&aacute;n, CP. 04530, M&eacute;xico, D.F., M&eacute;xico.</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Fecha de recepci&oacute;n: 12&#150;10&#150;2006    <br> Fecha de aprobaci&oacute;n: 30&#150;11&#150;2006</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2"><i>Introducci&oacute;n. </i>El pabell&oacute;n auricular es una estructura sofisticada y compleja. La presentaci&oacute;n cl&iacute;nica m&aacute;s frecuente de deformidades es la microtia. Los m&eacute;todos reconstructivos tienen como objetivo reproducir los relieves naturales de la oreja, con resultados est&eacute;ticos variables.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><i>Material y m&eacute;todos. </i>Pacientes con microtia que acudieron a consulta externa en el per&iacute;odo del a&ntilde;o 2002 al 2004. Se dise&ntilde;&oacute; la pr&oacute;tesis auricular tomando el modelo de la oreja normal; en caso de microtia bilateral, de un familiar. Se realiz&oacute; colocaci&oacute;n de implantes osteointegrados. Posterior a 6 meses, se colocaron los tornillos de cicatrizaci&oacute;n para fijaci&oacute;n de la pr&oacute;tesis.</font></p>     <p align="justify"><font face="verdana" size="2"><i>Resultados. </i>Se incluyeron 34 pacientes con microtia, 20 masculinos y 14 femeninos; edad promedio: 9.5 a&ntilde;os. La presentaci&oacute;n cl&iacute;nica m&aacute;s frecuente fue microtia unilateral (n =31). Tiempo quir&uacute;rgico promedio: 35 min. Se observ&oacute; adecuada integraci&oacute;n de implantes en los pacientes. El resultado est&eacute;tico fue muy satisfactorio. En el seguimiento (1.5 a&ntilde;os) se encontr&oacute; un paciente con cicatrizaci&oacute;n hipertr&oacute;fica, ninguna complicaci&oacute;n asociada al uso de pr&oacute;tesis ni necesidad de recambio prot&eacute;sico.</font></p>     <p align="justify"><font face="verdana" size="2"><i>Conclusiones. </i>La utilizaci&oacute;n de pr&oacute;tesis auriculares externas e implantes osteointegrados es un m&eacute;todo reconstructivo eficiente, con poca morbilidad y excelente resultado est&eacute;tico.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave. </b>Microtia; pr&oacute;tesis auriculares externas; implantes osteointegrados; reconstrucci&oacute;n auricular.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2"><i>Introduction. </i>The external ear is a sophisticated and complex structure. The most frequent congenital ear deformity is microtia. The different reconstructive methods are focused in reproducing the natural reliefs of the ear, with different aesthetics results.</font></p>     <p align="justify"><font face="verdana" size="2"><i>Material and methods. </i>Microtia patients who were seen between 2002 to 2004. The external prosthetic device was designed taking the pattern of the normal ear. In patients with bilateral microtia the ear pattern of a family member was used. Placements of the osseointegrated implants was carried out, and after 6 months of integration the scarring screws were placed in order fix de prosthesis</font></p>     <p align="justify"><font face="verdana" size="2"><i>Results. </i>Thirty four microtia patients were included, 20 were males, the median age was 9.5 years. The most frequent clinical presentation was unilateral microtia (n =31). The surgical time for the procedure averaged: 35 min. All patients had appropriate integration of the implant. The aesthetic result of the prosthetic reconstruction was very satisfactory. In the follow&#150;up period (1.5 years) we found an hypertrophic scar in 1 patient, no complications were associated to the use of prosthetic reconstruction and no patient required prosthetic replacement.</font></p>     <p align="justify"><font face="verdana" size="2"><i>Conclusions. </i>The prosthetic reconstruction with osseointegrated implants is an efficient reconstructive method, with little morbidity and excellent aesthetic result.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Key words.</b> Microtia; prosthetic reconstruction; osseointegrated implants; auricular reconstruction.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Introducci&oacute;n</b></font></p>     <p align="justify"><font face="verdana" size="2">El pabell&oacute;n auricular constituye una peque&ntilde;a porci&oacute;n de la superficie corporal pero es una estructura muy sofisticada y compleja morfol&oacute;gicamente.<sup>1</sup></font></p>     <p align="justify"><font face="verdana" size="2">La incidencia de las deformidades auriculares es de 1 en cada 6 <i>000 </i>nacidos. La causa es heterog&eacute;nea, incluyendo alteraciones gen&eacute;ticas, terat&oacute;genos, y anormalidades vasculares durante la morfog&eacute;nesis embrionaria. Los factores hereditarios encontrados involucran los diferentes tipos de herencia (dominante con penetrancia incompleta, recesiva y multifactorial), con diferentes espectros de presentaci&oacute;n cl&iacute;nica y otras asociaciones familiares con fisura palatina y s&iacute;ndromes de primero y segundo arco branquial.<sup>2</sup> La presentaci&oacute;n cl&iacute;nica m&aacute;s frecuente es la microtia, que en 60 a 70% se presenta de forma aislada.<sup>3</sup></font></p>     <p align="justify"><font face="verdana" size="2">Diversos autores han clasificado las deformidades auriculares de acuerdo a los vestigios presentes. Nagata<sup>4</sup> las clasifica en tipo l&oacute;bulo, concha, concha peque&ntilde;a y anotia. Esta &uacute;ltima presentaci&oacute;n es la forma m&aacute;s grave de microtia y representa la ausencia de o&iacute;do externo.</font></p>     <p align="justify"><font face="verdana" size="2">La primera reparaci&oacute;n auricular referida aparece en el <i>Susruta Samhita </i>en el que se constata la reparaci&oacute;n del l&oacute;bulo mediante un colgajo de mejilla. Es Tanzer,<sup>5</sup> en 1959, quien establece las bases de la cirug&iacute;a auricular moderna introduciendo el cart&iacute;lago costal aut&oacute;geno como fuente de injerto, en un s&oacute;lido bloque, describiendo seis pasos, que posteriormente simplifica a cuatro: 1. Z&#150;plastia asim&eacute;trica para rotaci&oacute;n del remanente auricular de l&oacute;bulo, 2. Tallado del arco auricular aut&oacute;logo contralateral costal de la sexta a la novena costillas, 3. Separaci&oacute;n del marco auricular con un injerto de piel inguinal de espesor total, 4. Profundizaci&oacute;n de la concha (Kirkham) y formaci&oacute;n del trago.<sup>6</sup> Brent<sup>7</sup><sup>&#150;9</sup>en 1999, reduce la reconstrucci&oacute;n auricular a dos tiempos: 1. Construcci&oacute;n del marco, 2. Rotaci&oacute;n del l&oacute;bulo y separaci&oacute;n de marco. Nagata<sup>10</sup><sup>&#150;13</sup> en 1992 describe la reconstrucci&oacute;n en dos pasos y en 1994 publica modificaciones a su t&eacute;cnica dependiendo del tipo de microtia (l&oacute;bulo, concha o concha peque&ntilde;a), mejorando los resultados est&eacute;ticos al reproducir de forma m&aacute;s natural las estructuras que conforman la oreja. En 1994 Park y col.<sup>14</sup><sup>&#150;17</sup> tallan un marco auricular similar a Brent,<sup>7</sup> rotan el l&oacute;bulo y con un colgajo de fascia tipo Song<sup>18</sup> cubre el marco auricular para realizar una reconstrucci&oacute;n en un solo tiempo quir&uacute;rgico.</font></p>     <p align="justify"><font face="verdana" size="2">M&uacute;ltiples variaciones se han realizado a dichas t&eacute;cnicas.<sup>19</sup><sup>&#150;23</sup> El principio com&uacute;n a la construcci&oacute;n de un pabell&oacute;n auricular consiste en reproducir los relieves naturales de una oreja a base de cart&iacute;lago,<sup>24</sup> cuya permanencia depende de diversos factores como la indicaci&oacute;n del procedimiento, la calidad de los tejidos y el manejo postoperatorio. El espectro de complicaciones incluyen las asociadas al sitio donador de cart&iacute;lago (neumotorax, atelectasia, deformidad de la pared tor&aacute;cica y cicatrices patol&oacute;gicas) y al sitio de reconstrucci&oacute;n, como hematoma, infecci&oacute;n, problemas de la cobertura cut&aacute;nea (necrosis cut&aacute;nea, da&ntilde;o vascular a la piel por tensi&oacute;n excesiva), exposici&oacute;n y reabsorci&oacute;n de cart&iacute;lago.<sup>25</sup></font></p>     <p align="justify"><font face="verdana" size="2">En las deformidades adquiridas la reconstrucci&oacute;n total presenta problemas espec&iacute;ficos: la p&eacute;rdida cut&aacute;nea, el meato auditivo normalmente situado que impide una incisi&oacute;n anterior y el tejido cicatricial, lo que hace en muchos casos necesaria la cobertura con colgajos faciales o utilizaci&oacute;n de implantes auriculares externos e implantes osteointegrados.<sup>26</sup><sup>,27</sup></font></p>     <p align="justify"><font face="verdana" size="2">El uso de implantes osteointegrados para la fijaci&oacute;n de pr&oacute;tesis auriculares externas nos ha introducido en una nueva dimensi&oacute;n para la reconstrucci&oacute;n auricular. El desarrollo de las pr&oacute;tesis auriculares ha permitido que diversos materiales como el silicon y acr&iacute;lico sean osteointegrados al mastoides con titanio con resultados est&eacute;ticos adecuados que benefician a pacientes con secuelas de c&aacute;ncer, quemaduras y mala calidad de piel, y aqu&eacute;llos con reconstrucciones auriculares aut&oacute;logas fallidas.<sup>28</sup><sup>&#150;30</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Si bien la reconstrucci&oacute;n auricular aut&oacute;loga ha sido la t&eacute;cnica est&aacute;ndar para el tratamiento de deformidades auriculares, debido a los buenos resultados reportados por los cirujanos expertos en esta &aacute;rea, cualquier resultado sub&oacute;ptimo puede ser incorregible.</font></p>     <p align="justify"><font face="verdana" size="2">El tiempo quir&uacute;rgico, las complicaciones asociadas a la zona donadora y a la zona reconstruida y necesidad de m&uacute;ltiples procedimientos quir&uacute;rgicos (dos a seis) hacen de la reconstrucci&oacute;n auricular aut&oacute;loga un procedimiento complejo. Esto ha llevado a la b&uacute;squeda de otras opciones que intentan mejorar el aspecto est&eacute;tico obtenido en la reconstrucci&oacute;n y a disminuir su morbilidad.</font></p>     <p align="justify"><font face="verdana" size="2">En este trabajo se describe la experiencia con la utilizaci&oacute;n de pr&oacute;tesis auriculares externas e implantes osteointegrados en el tratamiento de deformidades auriculares.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Material y m&eacute;todos</b></font></p>     <p align="justify"><font face="verdana" size="2">Se incluyeron todos los pacientes con microtia unilateral o bilateral que acudieron a la consulta externa del Instituto Nacional de Pediatr&iacute;a entre enero de 2002 a diciembre de 2004 y que aceptaron este tratamiento <a href="#f1">(Fig. 1)</a>.</font></p>     <p align="center"><font face="verdana" size="2"><a name="f1"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/bmim/v63n5/a4f1.jpg"></font></p>     <p align="justify"><font face="verdana" size="2">Fueron evaluados cl&iacute;nicamente por un equipo multidisciplinario (cirujano pl&aacute;stico, protesista, pediatra, otorrinolaring&oacute;logo, genetista, audiologo).</font></p>     <p align="justify"><font face="verdana" size="2">La pr&oacute;tesis auricular externa es dise&ntilde;ada por el Protesista tomando el modelo de la oreja normal en caso de microtia unilateral; y el modelo de la madre o alg&uacute;n hermano en caso de microtia bilateral.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><i>Procedimiento quir&uacute;rgico. </i>El procedimiento se divide en dos estadios: I. Se realiza resecci&oacute;n de remanentes, se levanta un colgajo dermograso y peri&oacute;stico, se colocan tres implantes osteointegrados de titanio comercialmente puro en el &aacute;rea correspondiente a la concha, sobre el proceso mastoideo <a href="#f2">(Fig. 2)</a>. Sutura por planos. II. Posterior a seis meses de integraci&oacute;n, se procede a la colocaci&oacute;n de tornillos de cicatrizaci&oacute;n para fijaci&oacute;n de las pr&oacute;tesis auriculares externas de silicon <a href="#f3">(Fig. 3)</a>.</font></p>     <p align="center"><font face="verdana" size="2"><a name="f2" id="f2"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/bmim/v63n5/a4f2.jpg"></font></p>     <p align="center"><font face="verdana" size="2"><a name="f3"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/bmim/v63n5/a4f3.jpg"></font></p>     <p align="justify"><font face="verdana" size="2"><i>Seguimiento. </i>Se realizan evaluaciones cl&iacute;nicas, radiol&oacute;gicas y registros fotogr&aacute;ficos en el preoperatorio y seis meses despu&eacute;s de colocado el implante <a href="/img/revistas/bmim/v63n5/a4f4.jpg" target="_blank">(Fig. 4)</a>.</font></p>     <p align="justify"><font face="verdana" size="2"><i>Criterios de inclusi&oacute;n. </i>Pacientes con microtia unilateral o bilateral, sin tratamiento previo.</font></p>     <p align="justify"><font face="verdana" size="2"><i>Criterios de exclusi&oacute;n. </i>Pacientes que no acudieran a citas y no completaran el seguimiento.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resultados</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Se incluyeron 34 pacientes con microtia, 20 del sexo masculino y 14 del sexo femenino <a href="#c1">(Cuadro 1)</a>, con una edad promedio de 9.5 a&ntilde;os (n =7&#150;12 a&ntilde;os). Se incluyeron 31 pacientes con microtia unilateral y tres con microtia bilateral. Dentro de la presentaci&oacute;n cl&iacute;nica unilateral, no se encontr&oacute; diferencia en la presentaci&oacute;n derecha (n =16) o izquierda (n =15) <a href="#c2">(Cuadro 2)</a>.</font></p>     <p align="center"><font face="verdana" size="2"><a name="c1"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/bmim/v63n5/a4c1.jpg"></font></p>     <p align="center"><font face="verdana" size="2"><a name="c2"></a></font></p>     <p align="center"><font face="verdana" size="2"><img src="/img/revistas/bmim/v63n5/a4c2.jpg"></font></p>     <p align="justify"><font face="verdana" size="2">Se encontr&oacute; asociaci&oacute;n con microsom&iacute;a hemifacial en tres pacientes.</font></p>     <p align="justify"><font face="verdana" size="2">El tiempo quir&uacute;rgico promedio fue de 35 min (30&#150;45 min). No se presentaron complicaciones transoperatorias. Dentro de las complicaciones a largo plazo se encontr&oacute; cicatriz hipertr&oacute;fica en un paciente, el cual respondi&oacute; al tratamiento m&eacute;dico.</font></p>     <p align="justify"><font face="verdana" size="2">Todos los pacientes completaron el seguimiento, mostrando adecuada integraci&oacute;n de los implantes de acuerdo a la valoraci&oacute;n radiol&oacute;gica.</font></p>     <p align="justify"><font face="verdana" size="2">El seguimiento promedio fue de 1.5 a&ntilde;os (6&#150;24 meses), no encontr&aacute;ndose complicaciones por el uso de pr&oacute;tesis externas. No ha habido necesidad de recambio prot&eacute;sico <a href="/img/revistas/bmim/v63n5/a4f5.jpg" target="_blank">(Fig. 5)</a>.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Discusi&oacute;n</b></font></p>     <p align="justify"><font face="verdana" size="2">Si bien la reconstrucci&oacute;n auricular aut&oacute;loga ha sido la t&eacute;cnica est&aacute;ndar para el tratamiento de deformidades auriculares debido a los buenos resultados reportados por los cirujanos expertos en esta &aacute;rea, cualquier resultado sub&oacute;ptimo puede ser incorregible.</font></p>     <p align="justify"><font face="verdana" size="2">El tiempo quir&uacute;rgico, las complicaciones asociadas a la zona donadora y a la zona reconstruida y necesidad de m&uacute;ltiples procedimientos quir&uacute;rgicos (dos a seis) hacen de la reconstrucci&oacute;n auricular aut&oacute;loga un procedimiento complejo. Esto ha llevado a la b&uacute;squeda de otras opciones que intentan mejorar el aspecto est&eacute;tico obtenido en la reconstrucci&oacute;n y a disminuir su morbilidad.</font></p>     <p align="justify"><font face="verdana" size="2">La utilizaci&oacute;n de materiales alopl&aacute;sticos ha sido frustrante, por su alto &iacute;ndice de extrusi&oacute;n a&uacute;n a varios a&ntilde;os del procedimiento original. Los cambios en la t&eacute;cnica quir&uacute;rgica cubriendo estos materiales con colgajos locales (fascia temporal, retroauricular, temporoparietal, etc.) requieren de un seguimiento a mayor plazo.</font></p>     <p align="justify"><font face="verdana" size="2">La reconstrucci&oacute;n con pr&oacute;tesis externas ha sido evaluada a largo plazo.<sup>31</sup> El inconveniente de los adhesivos ha sido superado con la utilizaci&oacute;n de implantes osteointegrados de titanio que permite la retenci&oacute;n de la pr&oacute;tesis. El resultado est&eacute;tico obtenido con una pr&oacute;tesis de buena calidad es inmejorable.</font></p>     <p align="justify"><font face="verdana" size="2">Las indicaciones absolutas para la utilizaci&oacute;n de pr&oacute;tesis auriculares externas e implantes osteointegrados reconocidas en la literatura son: 1. Reconstrucci&oacute;n auto loga fallida, 2. Da&ntilde;o de tejidos blandos grave o hipoplasia esquel&eacute;tica, 3. L&iacute;nea de implantaci&oacute;n baja del cabello, 4. Defectos auriculares postraum&aacute;ticos o postablativos (trauma y c&aacute;ncer).</font></p>     <p align="justify"><font face="verdana" size="2">Se eval&uacute;a actualmente la posibilidad de aplicaci&oacute;n de esta t&eacute;cnica en defectos cong&eacute;nitos como una opci&oacute;n de primera elecci&oacute;n para reconstrucci&oacute;n auricular.</font></p>     <p align="justify"><font face="verdana" size="2">Se concluye que la utilizaci&oacute;n de pr&oacute;tesis auriculares externas e implantes osteointegrados es un metodo reconstructivo eficiente, demostrando las siguientes ventajas: tiempo quir&uacute;rgico corto, disminuci&oacute;n de n&uacute;mero de cirug&iacute;as, ausencia de complicaciones asociadas a la zona donadora, complicaciones quir&uacute;rgicas m&iacute;nimas o ausentes, buen resultado est&eacute;tico.</font></p>     <p align="justify"><font face="verdana" size="2">Proponemos este tipo de manejo para pacientes con cualquier tipo de deformidad auricular cong&eacute;nita o adquirida.</font></p>     <p align="justify"><font face="verdana" size="2">Es necesario completar un seguimiento a mayor plazo, que nos permita evaluar el estado de las pr&oacute;tesis hasta la vida adulta, necesidad de recambio, retoques de color y realizar estudios comparativos con otras t&eacute;cnicas de reconstrucci&oacute;n.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. Aufrich L. Total ear reconstruction. Plast ReconstrSurg. 1947; 9: 247.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482356&pid=S1665-1146200600050000400001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">2. Tanzer RC. Microtia. Clin Plastic Surg. 1978; 5:317.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482358&pid=S1665-1146200600050000400002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">3. Avelar JM. A new technique for reconstruction of the auricle in acquired deformities. Ann Plastic Surg. 1987; 18: 5.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482360&pid=S1665-1146200600050000400003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">4. Nagata S. A new method of total reconstruction of the auricle for microtia. Plast Reconstr Surg. 1993; 92: 187.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482362&pid=S1665-1146200600050000400004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     ]]></body>
<body><![CDATA[<!-- ref --><p align="justify"><font face="verdana" size="2">5. Tanzer RC. Total reconstruction of external ear. Plast Reconstr Surg. 1959; 23: 5.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482364&pid=S1665-1146200600050000400005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">6. Tanzer RC. Total reconstruction of external ear. The evolution of a plan of treatment. Plast Reconstr Surg. 1971; 47: 523.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482366&pid=S1665-1146200600050000400006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">7. Brent B. Correction of microtia with autogenous cartilage grafts: the classic deformity. Plast Reconstr Surg. 1980; 66: 1.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482368&pid=S1665-1146200600050000400007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">8. Brent B. Correction of microtia with autogenous cartilage grafts: Atypical/complex deformities. Plast Reconstr Surg.  1980; 66:  1.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482370&pid=S1665-1146200600050000400008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">9. Brent B. Technical advances ear reconstruction with cartilage grafts. Personal experience 1 200 cases. Plast Reconstr Surg. 1999; 104: 2.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482372&pid=S1665-1146200600050000400009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     ]]></body>
<body><![CDATA[<!-- ref --><p align="justify"><font face="verdana" size="2">10. Nagata S. Modification of three stages in total reconstruction of the auricle: Part I. Grafting the three dimensional costal cartilage framework for lobule type microtia. Plast Reconstr Surg. 1994; 93: 2.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482374&pid=S1665-1146200600050000400010&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">11. Nagata S. Modification of three stages in total reconstruction of the auricle: Part II. Grafting the three dimensional costal cartilage framework for concha type microtia. Plast Reconstr Surg. 1994; 93: 2.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482376&pid=S1665-1146200600050000400011&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">12. Nagata S. Modification of three stages in total reconstruction of the auricle: Part III. Grafting the three dimensional costal cartilage framework for small concha type microtia. Plast Reconstr Surg. 1994; 93: 2.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482378&pid=S1665-1146200600050000400012&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">13. Nagata S. Modification of three stages in total reconstruction of the auricle: Part IV. Ear elevation for the constructed auricula. Plast Reconstr Surg. 1994; 93: 2.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482380&pid=S1665-1146200600050000400013&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">14. Chul&#150;Park DH, Lew WY. An analysis of 123 temporoparietal facials flaps: anatomic and clinical considerations in total auricular reconstruction. Plast Reconstr Surg. 1999; 104:   1295&#150;306.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482382&pid=S1665-1146200600050000400014&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     ]]></body>
<body><![CDATA[<!-- ref --><p align="justify"><font face="verdana" size="2">15. Park GC, Wiseman JB, Clark WD. Correction of congenital microtia using stereolithography for surgical planning. Plast Reconstr Surg. 2000; 105: 1444&#150;7.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482384&pid=S1665-1146200600050000400015&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">16. Chul P. Subfascial expansion and expanded two&#150;flap method for microtia reconstruction. Plast Reconstr Surg. 2000;  106:   1473&#150;87.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482386&pid=S1665-1146200600050000400016&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">17. Chul P. Balanced auricular reconstruction in dystopic microtia with the presence of the external auditory canal. Plast Reconstr Surg. 2002; 109: 1489&#150;500.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482388&pid=S1665-1146200600050000400017&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">18. Song R, Song Y. The superior auricular artery and retroauricular arterial island flaps. Plast Reconstr Surg. 1996; 98: 4.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482390&pid=S1665-1146200600050000400018&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">19. Firmin F. Ear reconstruction in cases of typical microtia, experience on 352 corrections. Scand J Plastic Surg. 1998; 32.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1482392&pid=S1665-1146200600050000400019&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     ]]></body>
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