<?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>0864-0300</journal-id>
<journal-title><![CDATA[Revista Cubana de Investigaciones Biomédicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Invest Bioméd]]></abbrev-journal-title>
<issn>0864-0300</issn>
<publisher>
<publisher-name><![CDATA[ECIMED]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-03002020000100012</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio de la precisión de un localizador de ápice electrónico en dientes monorradiculares]]></article-title>
<article-title xml:lang="en"><![CDATA[Assessment the accuracy of electronic apex locater in single canal teeth]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaple Gil]]></surname>
<given-names><![CDATA[Alain Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintana Muñoz]]></surname>
<given-names><![CDATA[Lisandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández Godoy]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuesta Noa]]></surname>
<given-names><![CDATA[Marisel de la Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Internacional de Salud La Pradera  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciencias Médicas de La Habana Facultad de Ciencias Médicas Victoria de Girón Departamento Carrera de Estomatología]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Policlínico Docente de Playa  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Chile Departamento de Odontología Restauradora ]]></institution>
<addr-line><![CDATA[Santiago de Chile ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma de Chile Instituto de Ciencias Biomédicas ]]></institution>
<addr-line><![CDATA[Santiago de Chile ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>39</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03002020000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03002020000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03002020000100012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: La correcta determinación de la longitud de trabajo es uno de los principales factores determinantes para el éxito de los tratamientos endodónticos.  Objetivo:  valorar si es precisa la determinación de la longitud de trabajo de un localizador de ápice electrónico en dientes monorradiculares.  Métodos:  se realizó un estudio experimental exploratorio in vivo, donde se determinó la longitud de trabajo en 141 conductos monorradiculares en pacientes con indicación de exodoncia. Se determinó la longitud de trabajo con un localizador de ápice electrónico iPex II(NSK). Cuando el localizador marcó que la lima se encontraba en el ápice, sin retirar el instrumento del conducto se procedió a fijarla. Se realizó la extracción con precaución y, posteriormente, se desgastó una pared proximal del tercio apical hasta que se pudo observar la lima en el interior del conducto, con auxilio de una lupa. La longitud de trabajo fue aceptable cuando el localizador determinó que estaba entre 0,5-1,5 mm del límite cemento-dentina-conducto; corto cuando estaba a más de 1,5 mm y largo cuando se observó que sobrepasaba el límite cemento-dentina-conducto.  Resultados:  fue aceptable la precisión en 135 (95,7 %) mediciones y solo 13 (9,2 %) conductos tuvieron inestabilidad, con una relación existente entre la precisión y la inestabilidad de las mediciones. Se observó que 88 (62,4 %) conductos con secreciones obtuvieron un aceptable en la determinación de la longitud de trabajo, mientras que solo 3 (2,1 %) conductos con secreciones tuvieron mediciones cortas. La presencia de secreciones no fue significativa para evaluar la precisión.  Conclusiones:  Las mediciones de las longitudes de trabajo empleando el localizador estudiado fueron mayormente de precisión aceptable y no inestables. Del mismo modo, la presencia de secreciones en el interior de los conductos radiculares no afectó significativamente la precisión del localizador en cuestión.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  The correct determination of working length is one of the main determining factors for the success of endodontic treatments. Objective: to assess the accuracy when determining the working length of an electronic apex locator.  Objective:  To assess the accuracy of the determination of the working length of an electronic apex locator in monoradicular teeth.  Material and methods:  An exploratory experimental study was carried out in vivo where the working length was taken in 141 monoradicular root canals of patients with indication of extraction. Working length was determined using iPex II electronic apex locator (NSK). When the locator marked that the file was at the apex, without removing the instrument from the duct, it was fixed. The extraction was performed with caution and subsequently a proximal wall of the apical third was worn down until the file was observed inside the duct, observed and studied with the help of a magnifying glass. The working length was acceptable when the locator determined that it was between 0.5-1.5 mm of the cement-dentin-duct limit; short when it was more than 1.5 mm and long when it was observed that it exceeded the cement-dentine-duct limit.  Results:  The accuracy of 95.7 % (135) of the measurements was acceptable and only 13(9.2 %) ducts had instability, with an existing relationship between the accuracy and instability of the measurements. It was observed that 88(62.4 %) ducts with secretions obtained an acceptable one in the determination of the length of work. Only 3 (2.1 %) ducts with secretions had short measurements. The presence of secretions was not significant to assess the accuracy.  Conclusions:  The measurements of the working lengths using the locator studied were, almost entirely, of acceptable precision and were practically unstable. Similarly, the presence of secretions inside the root canals did not significantly affect the accuracy of the localizer in question.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[endodoncia]]></kwd>
<kwd lng="es"><![CDATA[ápice del diente]]></kwd>
<kwd lng="es"><![CDATA[medicina de precisión]]></kwd>
<kwd lng="es"><![CDATA[evaluación de la tecnología biomédica]]></kwd>
<kwd lng="es"><![CDATA[estudios de evaluación]]></kwd>
<kwd lng="en"><![CDATA[endodontics]]></kwd>
<kwd lng="en"><![CDATA[tooth apex]]></kwd>
<kwd lng="en"><![CDATA[precision medicine]]></kwd>
<kwd lng="en"><![CDATA[technology assessment, biomedical]]></kwd>
<kwd lng="en"><![CDATA[evaluation studies]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Janeczek]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kosior]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Piesiak-Panczyszyn]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Dudek]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Chroszcz]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Czajczynska-Waszkiewicz]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Effect of File Size and Type and Irrigation Solutions on the Accuracy of Electronic Apex Locators: An In Vitro Study on Canine Teeth]]></article-title>
<source><![CDATA[BioMed research international]]></source>
<year>2016</year>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gehlot]]></surname>
<given-names><![CDATA[PM]]></given-names>
</name>
<name>
<surname><![CDATA[Manjunath]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Manjunath]]></surname>
<given-names><![CDATA[MK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An in vitro evaluation of the accuracy of four electronic apex locators using stainless-steel and nickel-titanium hand files]]></article-title>
<source><![CDATA[Restorative dentistry &amp; endodontics]]></source>
<year>2016</year>
<volume>41</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Raghu]]></surname>
<given-names><![CDATA[KN]]></given-names>
</name>
<name>
<surname><![CDATA[Daniel]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Razvi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Vinaychandra]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Kini]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Nandakishore]]></surname>
<given-names><![CDATA[KJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[In vivo evaluation of the accuracy of working length determination using an electronic apex locater IPEX (NSK) on vital uninfected teeth and teeth with radiographic evidence of periapical lesions]]></article-title>
<source><![CDATA[Journal of International Society of Preventive &amp; amp; Community Dentistry]]></source>
<year>2014</year>
<volume>4</volume>
<numero>^s3</numero>
<issue>^s3</issue>
<supplement>3</supplement>
<page-range>S204-8</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sidhu]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Shankargouda]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Dicksit]]></surname>
<given-names><![CDATA[DD]]></given-names>
</name>
<name>
<surname><![CDATA[Mahdey]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
<name>
<surname><![CDATA[Muzaffar]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Arora]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of Interference of Cellular Phones on Electronic Apex Locators An In Vitro Study]]></article-title>
<source><![CDATA[Journal of endodontics]]></source>
<year>2016</year>
<volume>42</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>622-5</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Altunbas]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Kustarci]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Arslan]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Er]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Kocak]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of various current electronic apex locators to determine the working length using the clearing technique]]></article-title>
<source><![CDATA[Nigerian journal of clinical practice]]></source>
<year>2015</year>
<volume>18</volume>
<numero>3</numero>
<issue>3</issue>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gurel]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Helvacioglu Kivanc]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Ekici]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A comparative assessment of the accuracies of Raypex 5, Raypex 6, iPex and iPex II electronic apex locators: An in vitro study]]></article-title>
<source><![CDATA[Journal of Istanbul University Faculty of Dentistry]]></source>
<year>2017</year>
<volume>51</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aggarwal]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Singla]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Bhasin]]></surname>
<given-names><![CDATA[SS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of instrument size and varying electrical resistance of root canal instruments on accuracy of three electronic root canal length measurement devices]]></article-title>
<source><![CDATA[International endodontic journal]]></source>
<year>2017</year>
<volume>50</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>506-11</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chaudhary]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Gharti]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Adhikari]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An in vivo comparison of accuracy of two electronic apex locators in determining working length using stainless steel and nickel titanium files]]></article-title>
<source><![CDATA[Clinical, cosmetic and investigational dentistry]]></source>
<year>2018</year>
<volume>10</volume>
<page-range>75-82</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saxena]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Saha]]></surname>
<given-names><![CDATA[SG]]></given-names>
</name>
<name>
<surname><![CDATA[Bharadwaj]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Vijaywargiya]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Dubey]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Kala]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A comparative evaluation of accuracy of three electronic apex locators using histological section as gold standard An ex vivo study]]></article-title>
<source><![CDATA[Journal of conservative dentistry : JCD]]></source>
<year>2017</year>
<volume>20</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>251-4</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bahrololoomi]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Soleymani]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
<name>
<surname><![CDATA[Modaresi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Imanian]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lotfian]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Accuracy of an Electronic Apex Locator for Working Length Determination in Primary Anterior Teeth]]></article-title>
<source><![CDATA[Journal of dentistry (Tehran, Iran)]]></source>
<year>2015</year>
<volume>12</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>243-8</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Estrela]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Couto]]></surname>
<given-names><![CDATA[GS]]></given-names>
</name>
<name>
<surname><![CDATA[Bueno]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
<name>
<surname><![CDATA[Bueno]]></surname>
<given-names><![CDATA[KG]]></given-names>
</name>
<name>
<surname><![CDATA[Estrela]]></surname>
<given-names><![CDATA[LRA]]></given-names>
</name>
<name>
<surname><![CDATA[Porto]]></surname>
<given-names><![CDATA[OCL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Apical Foramen Position in Relation to Proximal Root Surfaces of Human Permanent Teeth Determined by Using a New Cone-beam Computed Tomographic Software]]></article-title>
<source><![CDATA[Journal of endodontics]]></source>
<year>2018</year>
<volume>44</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1741-8</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guerrero Montoya]]></surname>
<given-names><![CDATA[CYSU]]></given-names>
</name>
<name>
<surname><![CDATA[Castro Salazar]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Verdugo Barraza]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Zavala Cazares]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efectividad de dos localizadores apicales en la determinación de la longitud de trabajo]]></article-title>
<source><![CDATA[Revista Odontológica Latinoamericana]]></source>
<year>2012</year>
<volume>4</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Altunbas]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Kustarci]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Toyoglu]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Influence of Various Irrigants on the Accuracy of 2 Electronic Apex Locators in Locating Simulated Root Perforations]]></article-title>
<source><![CDATA[Journal of endodontics]]></source>
<year>2017</year>
<volume>43</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>439-42</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fretes]]></surname>
<given-names><![CDATA[VR]]></given-names>
</name>
<name>
<surname><![CDATA[Pedrozo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Gamarra]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Escobar]]></surname>
<given-names><![CDATA[PM]]></given-names>
</name>
<name>
<surname><![CDATA[Cubilla]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
<name>
<surname><![CDATA[Adorno]]></surname>
<given-names><![CDATA[CG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio preliminar sobre la repetibilidad in vivo de tres localizadores apicales electrónicos]]></article-title>
<source><![CDATA[Rev Cubana Estomatol]]></source>
<year>2019</year>
<volume>56</volume>
<numero>3</numero>
<issue>3</issue>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
