<?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>1870-199X</journal-id>
<journal-title><![CDATA[Revista odontológica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Odont. Mex]]></abbrev-journal-title>
<issn>1870-199X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Odontología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-199X2021000400376</article-id>
<article-id pub-id-type="doi">10.22201/fo.1870199xp.2021.25.4.84056</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Clasificación de enfermedades y condiciones periodontales y periimplantarias 2018. Segunda parte]]></article-title>
<article-title xml:lang="en"><![CDATA[Classification of periodontal and peri-implant diseases and conditions 2018. Second part]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yáñez Ocampo]]></surname>
<given-names><![CDATA[Beatriz Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas Casillas]]></surname>
<given-names><![CDATA[Ana Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Odontología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>25</volume>
<numero>4</numero>
<fpage>376</fpage>
<lpage>392</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2021000400376&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2021000400376&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2021000400376&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La clasificación de enfermedades periodontales del año 1999 estu vo vigente durante 18 años, por lo que en 2017 se realizó un taller mundial, donde expertos periodontales de todo el mundo, con el copatrocinio de la Academia Americana de Periodontología (AAP) y de la Federación Europea de Periodontología (EFP), se reunieron para actualizar y presentar una nueva clasificación conforme se ha ido expandiendo la evidencia basada en investigaciones científicas. Se dividieron en cuatro grupos de trabajo consistentes en: I salud periodontal, enfermedades y condiciones gingivales. II Formas de periodontitis. III manifestaciones periodontales de las enfermeda des sistémicas y condiciones del desarrollo y adquiridas. IV Enfermedades y condiciones periimplantarias. En esta segunda parte se abordarán las principales definiciones y parámetros del grupo III (manifestaciones periodontales de las enfermedades sistémicas y condiciones del desarrollo y adquiridas), donde se incluye a las enfermedades sistémicas que ocasionan daño directo a los tejidos periodontales sanos, a los abscesos periodontales y las lesiones endodóncicas-periodontales, clasificándolos según si existe o no presencia de periodontitis. También se considera el cambio del término biotipo por fenotipo periodontal y una nueva clasificación de las recesiones gingivales, la cual evalúa su severidad a partir de la pérdida de la inserción interproximal. Asimismo, se revisa el grupo IV (enfermedades y condiciones periimplantarias) donde se descri be la salud periimplantaria, la mucositis periimplantaria y la periimplantitis, y las deficiencias de tejidos blandos y duros.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The 1999 classification of periodontal diseases was in force for 18 years. In 2017 a world workshop was performed, where periodontal experts from all over the world, with the co-sponsorship of the American Academy of Periodontology (AAP) and the European Federation of Periodontology (EFP), met to update and present a new classification as evidence based on scientific research has expanded. They were divided into four working groups: I periodontal health, diseases, and gingival conditions. II Forms of periodontitis. III Periodontal manifestations of systemic diseases and developmental and acquired conditions. IV Peri-implant diseases and conditions. This second part will address the main definitions and parameters of group III (Periodontal manifestations of systemic diseases and developmental and acquired conditions), which includes systemic diseases that cause direct damage to healthy periodontal tissues, periodontal abscesses, and endodontic-periodontal lesions, classifying them according to whether or not periodontitis exists. It also considers the change of the term biotype by periodontal phenotype and a new classification of gingival recessions, which evaluates their severity from the interproximal attachment loss. Finally, group IV (Peri-implant diseases and conditions) is also reviewed, describing peri-implant health, peri-implant mucositis and peri-implantitis, and hard and soft tissue deficiencies.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[enfermedad sistémica]]></kwd>
<kwd lng="es"><![CDATA[absceso periodontal]]></kwd>
<kwd lng="es"><![CDATA[fenotipo]]></kwd>
<kwd lng="es"><![CDATA[recesión gingival]]></kwd>
<kwd lng="es"><![CDATA[implante dental]]></kwd>
<kwd lng="es"><![CDATA[enfermedades periimplantarias]]></kwd>
<kwd lng="en"><![CDATA[systemic disease]]></kwd>
<kwd lng="en"><![CDATA[periodontal abscess]]></kwd>
<kwd lng="en"><![CDATA[phenotype]]></kwd>
<kwd lng="en"><![CDATA[gingival recession]]></kwd>
<kwd lng="en"><![CDATA[dental implant]]></kwd>
<kwd lng="en"><![CDATA[peri-implant diseases]]></kwd>
</kwd-group>
</article-meta>
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