<?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>1561-3194</journal-id>
<journal-title><![CDATA[Revista de Ciencias Médicas de Pinar del Río]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Ciencias Médicas]]></abbrev-journal-title>
<issn>1561-3194</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1561-31942019000500654</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efectividad de los métodos radiográficos periapicales por paralelismo y bisección]]></article-title>
<article-title xml:lang="en"><![CDATA[Effectiveness of periapical radiographic methods by parallelism and bisection]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra Pando]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trujillo Saínz]]></surname>
<given-names><![CDATA[Zenobia de la Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Coste Reyes]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carmona Concepción]]></surname>
<given-names><![CDATA[Juan Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fra Santos]]></surname>
<given-names><![CDATA[Ivet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Ciencias Médicas de Pinar del Río Facultad de Ciencias Médicas Ernesto Che Guevara de la Serna ]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciencias Médicas de Pinar del Río Clínica Estomatológica Ormani Arenado ]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Ciencias Médicas de Pinar del Río Policlínico Universitario 5 de septiembre ]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<volume>23</volume>
<numero>5</numero>
<fpage>654</fpage>
<lpage>663</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1561-31942019000500654&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1561-31942019000500654&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1561-31942019000500654&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: la radiografía periapical constituye el método clásico y más empleado en Estomatología. Se puede realizar con dirección bisectal o por paralelismo; esta última alcanza una generalización y eficacia marcada, debido al desarrollo de sistemas posicionadores y de enfoque de la película.  Objetivo: determinar la efectividad de los métodos radiográficos periapicales por bisección y paralelismo, en la Clínica Estomatológica Docente Antonio Briones Montoto.  Métodos: se realizó un estudio descriptivo transversal, entre diciembre 2017 y abril 2018, en el Departamento de Radiología de la clínica estomatológica seleccionada en una muestra de 80 pacientes, a los que se le realizó una radiografía periapical por bisección y otra por paralelismo de región de bicúspides y/o molares superiores. Se compararon las imágenes obtenidas.  Resultados: las imágenes parciales se produjeron en 12,5 y 4 % con bisección y paralelismo. Las distorsiones más frecuentes fueron las superposiciones del piso del seno maxilar y del cigomático a las raíces en un 45 y 26,5 % con dirección bisectal y de 10 y 5 % con paralelismo; mientras que la necesidad de repetir radiografías fue de un 25 y 6,25 %.  Conclusiones:  todas las imágenes producidas con el método periapical por paralelismo con la utilización de sistemas de Extensión de Cono Paralelo, presentaron un enfoque total, con escasas y leves distorsiones de las imágenes con ahorro, la necesidad de repetir radiografías fue mínima, además, resultó muy fácil de aprender y realizar por personal novel.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: periapical radiography constitutes the classic and more used method in Dentistry, which can be carried out with bisectal direction or by parallelism, reaching this last one, a generalization and marked efficacy due to the development of system positioners and a coating approach.  Objective:  to determine the effectiveness of periapical radiographic methods by bisection and parallelism at Antonio Briones Montoto Dentistry Teaching Clinic.  Methods:  a cross-sectional descriptive study was carried out between December 2017 and April 2018 in the Radiology Department of the chosen dentistry clinic in a sample of 80 patients, who were given a periapical radiography by bisection and another by parallelism of the region of bicuspids and/or upper molars by trained students of the fourth academic-year of dentistry studies and comparing the images obtained.  Results:  partial images were produced in 12,5 % and 4 % with bisection and parallelism respectively. The most frequent distortions were the overlapping of the maxillary sinus and zygomatic floor to the roots in 45 and 26,5 % with bisectal direction, 10 and 5 % with parallelism; while the need to repeat X-rays was 25 and 6,25 % respectively.  Conclusions:  by the periapical and parallelism methods using XCP systems, all the images produced presented a total approach, with scarce and slight distortions of the images saving resources because the need to repeat X-rays was minimal, in addition, it was very easy to learn and perform by novel personnel.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[RADIOGRAFÍA DENTAL]]></kwd>
<kwd lng="es"><![CDATA[TOMOGRAFIA COMPUTARIZADA DE HAZ CONICO]]></kwd>
<kwd lng="es"><![CDATA[RADIOGRAFÍA DENTAL DIGITAL]]></kwd>
<kwd lng="es"><![CDATA[PERIODONCIA]]></kwd>
<kwd lng="es"><![CDATA[DIAGNÓSTICO]]></kwd>
<kwd lng="en"><![CDATA[RADIOGRAPHY, DENTAL]]></kwd>
<kwd lng="en"><![CDATA[CONE-BEAM COMPUTED TOMOGRAPHY]]></kwd>
<kwd lng="en"><![CDATA[RADIOGRAPHY, DENTAL, DIGITAL]]></kwd>
<kwd lng="en"><![CDATA[PERIODONTICS]]></kwd>
<kwd lng="en"><![CDATA[DIAGNOSIS]]></kwd>
</kwd-group>
</article-meta>
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