<?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>S1870-199X2022000100063</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Frecuencia de agudización en casos de retratamiento endodóntico con diferente longitud de obturación]]></article-title>
<article-title xml:lang="en"><![CDATA[Frequency of aggravation in cases of endodontic retreatment with different length of obturation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oropeza Ledezma]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna Domínguez]]></surname>
<given-names><![CDATA[Jorge Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna Lara]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliver Parra]]></surname>
<given-names><![CDATA[Rogelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Facultad de Odontología ]]></institution>
<addr-line><![CDATA[Tampico Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<fpage>63</fpage>
<lpage>69</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2022000100063&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2022000100063&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2022000100063&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: la remoción completa de materiales de obturación y dentina contaminada del conducto radicular durante el retratamiento endodóntico puede influir en la aparición de agudización endodóntica.  Objetivo:  establecer la frecuencia de agudización endodóntica posterior al retratamiento endodóntico de dientes anterosuperiores con diferente longitud de obturación apical.  Material y métodos: se eligieron 33 casos con fracaso endodóntico para este estudio. Según la longitud apical de la obturación inicial, los sujetos se dividieron en dos grupos: el grupo A (n = 23) fueron casos obturados entre 0.0 y 2.0 mm al ápice radiográfico (AR) y el grupo B (n = 10) casos obturados entre 2.1 y 6 mm cortos al AR. Las obturaciones con gutapercha se eliminaron con instrumentos ProTaper retreatment D1 a D3 (Dentsply-Sirona, Ballaigues, Switzerland) más cloroformo. Posteriormente los conductos radiculares se instrumentaron con limas K-flexofile. Los casos reinstrumentados fueron obturados con gutapercha (Higyenic, Coltene Whaledent) y Sealapex (Kerr Sybronendo, WA) durante la misma cita. Los pacientes tomaron 400 mg de ibuprofeno cada ocho horas durante 72 horas y registraron el dolor postoperatorio a las ocho, 24, 48 y 72 horas. Se definió como agudización la aparición de dolor severo y/o inflamación (dolor en escala Heft-Parker a partir de 114 mm). Se determinaron porcentajes de casos positivos a la palpación y percusión a las 72 horas en ambos grupos.  Resultados: dos pacientes presentaron agudización (6%), ambos en el grupo A. El dolor postoperatorio fue de 21.2% en los pacientes del grupo A a las ocho horas y 9.1% a las 48 horas. No se encontraron diferencias estadísticamente significativas en la presencia de agudización entre grupos (p &gt; 0.05).  Conclusiones: la agudización de casos de retratamiento endodóntico es de 6%. La longitud de obturación de casos indicados para retratamiento endodóntico no influye en la frecuencia de agudización postoperatoria.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: complete removal of filling materials and contaminated dentin from the root canal during endodontic retreatment may influence the appearance of an endodontic flare-up.  Objective: to determine the frequency of endodontic flare-ups after endodontic retreatment of upper anterior teeth with different lengths of apical filling.  Material and methods: thirty-three cases of endodontic failure were chosen for this study. According to the apical length of the initial filling, the subjects were divided into 2 groups: cases closed between 0.0 and 2.0 mm from the radiographic apex (RA) were placed in group A (n = 23) and group B (n = 10) corresponded to cases closed between 2.1 to 6 mm short to RA. Gutta-percha fillings were removed with ProTaper retreatment instruments D1 to D3 (Dentsply-Sirona, Ballaigues, Switzerland) plus chloroform. Subsequently, the root canals were instrumented with K-flexofile files. The reinstrumented cases were filled with Gutta-percha (Higyenic, Coltene Whaledent) and Sealapex (Kerr Sybronendo, WA) during the same appointment. Patients received 400 mg of ibuprofen every 8 hours for 72 hours and recorded postoperative pain at 8, 24, 48, and 72 hours. Flare-up was defined as the appearance of severe pain (pain on the Heft-Parker scale from 114) and/or inflammation. Percentages of positive cases upon palpation and percussion at 72 hours were determined for both groups.  Results: two patients presented exacerbation (6%), both of them in group A. Postoperative pain was 21.2% for group A at 8 hours and 9.1% at 48 hours. No statistically significant differences were found in the presence of exacerbation between groups (p &gt; 05).  Conclusions: theaggravation of endodontic retreatment cases is 6%. The obturation length of cases indicated for endodontic retreatment does not influence the frequency of postoperative aggravation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[agudización endodóntica]]></kwd>
<kwd lng="es"><![CDATA[retratamiento endodóntico]]></kwd>
<kwd lng="es"><![CDATA[dolor postoperatorio]]></kwd>
<kwd lng="es"><![CDATA[factores de riesgo]]></kwd>
<kwd lng="en"><![CDATA[endodontic flare-up]]></kwd>
<kwd lng="en"><![CDATA[non-surgical treatment]]></kwd>
<kwd lng="en"><![CDATA[postoperative pain]]></kwd>
<kwd lng="en"><![CDATA[risk factors]]></kwd>
</kwd-group>
</article-meta>
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<volume>24</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>257-63</page-range></nlm-citation>
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</ref-list>
</back>
</article>
