<?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>1130-0558</journal-id>
<journal-title><![CDATA[Revista Española de Cirugía Oral y Maxilofacial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Esp Cirug Oral y Maxilofac]]></abbrev-journal-title>
<issn>1130-0558</issn>
<publisher>
<publisher-name><![CDATA[ Sociedad Española de Cirugía Oral y Maxilofacial y de Cabeza y Cuello]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1130-05582020000300002</article-id>
<article-id pub-id-type="doi">10.20986/recom.2020.1133/2020</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[¿Es el desplazamiento discal sinónimo de patología articular temporomandibular? Correlación clínico-radiológica y prevalencia de trastornos internos en sujetos voluntarios asintomáticos]]></article-title>
<article-title xml:lang="en"><![CDATA[Is disc displacement synonymous with temporomandibular joint pathology? Clinical-radiological correlation and prevalence of internal disorders in asymptomatic volunteers subjects]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Ballester]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-García]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Nogales]]></surname>
<given-names><![CDATA[Agustín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-García]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monje Gil]]></surname>
<given-names><![CDATA[Florencio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Universitario Infanta Cristina Servicio de Cirugía Oral y Maxilofacial ]]></institution>
<addr-line><![CDATA[Badajoz ]]></addr-line>
<country>España</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Extremadura Facultad de Medicina Departamento de Bioestadística]]></institution>
<addr-line><![CDATA[Badajoz ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>42</volume>
<numero>3</numero>
<fpage>97</fpage>
<lpage>106</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S1130-05582020000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S1130-05582020000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S1130-05582020000300002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: Los trastornos internos (TI) de la articulación temporomandibular (ATM) constituyen la condición clínica articular más frecuente en pacientes con trastornos temporomandibulares (TTM). Presentes hasta en un 80-90 % de los casos sintomáticos, no se sabe por qué, su presencia en sujetos asintomáticos no causa dolor ni disfunción. En contraposición, una posición normal del disco ha sido descrita en un 16-23 % de pacientes sintomáticos.  Objetivos: Analizar la prevalencia de TI de la ATM en sujetos voluntarios asintomáticos y qué características clínico-radiológicas podrían favorecer su presencia o desarrollo.  Material y método: Se diseñó un estudio descriptivo, observacional, transversal. Se seleccionaron 43 sujetos de una población de 253 residentes que realizaban su formación médica especializada. El estudio fue desarrollado en varias fases. Fase I: Anamnesis y examen clínico. Empleo del índice craneomandibular de Fricton (ICM); Fase II: Adquisición y evaluación de imágenes de Resonancia Magnética (RMN). Las imágenes fueron procesadas a formato DICOM 4.0 y evaluadas por dos examinadores externos. Fase III: Análisis morfoestructural de las ATM. Las imágenes de RMN fueron analizadas empleando el programa informático Osirix® V 3.5.1.  Resultados: Setenta y dos articulaciones (pertenecientes a 36 sujetos) fueron finalmente analizadas. La edad media fue de 28,39 ± 3,70 años con una distribución por sexos de 47,2 % hombres y de 52,8 % mujeres. El análisis inferencial mostró resultados estadísticamente significativos en relación con las variables sexo (p = 0,021), chasquido articular (p = 0,007), valor del ICM (p = 0,000296), morfología discal (p = 1,032 x 10-8), morfología condilar (p = 2,116 x 10-8), posición condilar en el interior de la ATM (longitudes posterior y superior, p = 5,385 x 10-9; p = 0,000245, respectivamente) y morfología de la fosa articular (p = 0,024).  Conclusiones: Existe una elevada prevalencia de TI de la ATM en los sujetos asintomáticos analizados. Ciertos criterios clínicos (chasquido articular) y radiológicos (morfología discal alargada/doblada, cóndilo y fosa aplanados y posición más posterior y craneal del cóndilo mandibular) podrían ser considerados como predictores o relacionados con la presencia de desplazamiento discal. El ICM podría constituir una herramienta útil en el diagnóstico de patología articular de la ATM.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: Internal derangements (IDs) of the temporomandibular joint (TMJ) constitute the most common clinical joint condition in patients with temporomandibular disorders (TMDs). Present in up to 80-90 % of symptomatic cases, it is not known why, its presence in asymptomatic subjects does not cause pain or dysfunction. In contrast, a normal position of the disc has been described in 16-23 % of symptomatic patients.  Objectives: To analyze the prevalence of IDs of the TMJ in asymptomatic voluntary subjects and what clinical-radiological characteristics could favor their presence or development.  Material and methods: A descriptive, observational, cross-sectional study was designed. Forty-three subjects from a population of 253 residents who performed their training program were selected. The study was carried out in several phases. Phase I: Anamnesis and clinical examination. Use of the Fricton Cranio-mandibular Index (CMI); Phase II: Acquisition and evaluation of Magnetic Resonance Imaging (MRI). The images were processed in DICOM 4.0 format and evaluated by two external examiners. Phase III: Morpho-structural analysis of the TMJs. The MRI were analyzed using the Osirix® V 3.5.1 Software.  Results: Seventy-two joints (belonging to 36 subjects) were finally analyzed. The mean age was 28.39 ± 3.70 years with a distribution by sex of 47.2% men and 52.8 % women. The inferential analysis showed statistically significant results in relation to the variables sex (p = 0.021), joint click (p = 0.007), CMI value (p = 0.000296), disc morphology (p = 1.032x10-8), condylar morphology (p = 2.116x10-8) and condylar position inside the TMJ ((posterior and superior lengths, p = 5.385x10-9; p = 0.000245, respectively) and morphology of the joint fossa (p = 0.024).  Conclusions: A high prevalence of IDs in asymptomatic subjects is present in our study. Certain clinical (joint clicking) and radiological criteria (an elongated or bent disc morphology, a flattened condyle and fossa and a more posterior and cranial position of the mandibular condyle) could be considered as predictors or be related to the presence of disc displacement. The CMI could be a useful tool in the diagnosis of joint pathology of the TMJ.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Articulación temporomandibular]]></kwd>
<kwd lng="es"><![CDATA[ATM]]></kwd>
<kwd lng="es"><![CDATA[Desplazamiento discal]]></kwd>
<kwd lng="es"><![CDATA[Sujetos asintomáticos]]></kwd>
<kwd lng="es"><![CDATA[Trastornos internos]]></kwd>
<kwd lng="en"><![CDATA[Temporomandibular joint]]></kwd>
<kwd lng="en"><![CDATA[TMJ]]></kwd>
<kwd lng="en"><![CDATA[Disc displacement]]></kwd>
<kwd lng="en"><![CDATA[Asymptomatic subjects]]></kwd>
<kwd lng="en"><![CDATA[Internal derangement]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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