<?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>S0864-03002020000300008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Regresión de la luminosidad del color posblanqueamiento dental casero en pacientes fumadores y no fumadores]]></article-title>
<article-title xml:lang="en"><![CDATA[Color luminosity regression after home tooth whitening in smoking and nonsmoking patients]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes]]></surname>
<given-names><![CDATA[Cristobal]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaple Gil]]></surname>
<given-names><![CDATA[Alain]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bersezio]]></surname>
<given-names><![CDATA[Cristian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Chile Facultad de Odontología Departamento de Odontología Restauradora]]></institution>
<addr-line><![CDATA[Santiago de Chile ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciencias Médicas de La Habana Centro Internacional de Salud &#8220;La Pradera&#8221; ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<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>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>39</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03002020000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03002020000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03002020000300008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: Existen muchos estudios de efectividad del blanqueamiento dental; sin embargo, son muy pocos los que hablan de regresión de color (fenómeno que se produce posterior a un blanqueamiento dental), lo mismo ocurre en relación a pacientes fumadores.  Objetivo  Determinar la regresión de la luminosidad del color en pacientes sometidos a blanqueamiento dental casero con peróxido de carbamida al 10 %, en pacientes fumadores y no fumadores.  Métodos:  Estudio descriptivo, transversal, en 43 pacientes de un grupo de 60 previamente tratados de forma casera durante 3 semanas con peróxido de carbamida al 10 %. Fueron divididos en un grupo experimental (pacientes fumadores GE) y grupo control (no fumadores GC). Se midió la variación del color con el espectrofotómetro Vita Easyshade® a la semana, mes, 6 meses y 9 meses posblanqueamiento. Los datos obtenidos mediante la medición con el espectrofotómetro fueron analizados por el test de Shapiro Wilk y Kolmogorov-Smirnov para evaluar normalidad de la distribución y, posteriormente, sometidos al test Mann-Whitney U y Wilcoxon W (&#945; = 0,05).  Resultados: El delta L* fue: 2,3 (GE) y 3,66 (GC); deltas calculados con datos de los 9 meses vs. semana posblanqueamiento. No hubo diferencias estadísticamente significativas entre ambos grupos.  Conclusiones: No existen diferencias estadísticamente significativas en la regresión del color posteriores al blanqueamiento casero con peróxido de carbamida al 10 % en pacientes fumadores y no fumadores.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: Many studies have been conducted about the effectiveness of tooth whitening, but few refer to color regression (a phenomenon occurring after tooth whitening) or to smoking patients.  Objective:  Determine color luminosity regression in smoking and nonsmoking patients undergoing home tooth whitening with 10 % carbamide peroxide.  Methods:  A descriptive cross-sectional study was conducted of 43 patients from a group of 60 previously undergoing home treatment with 10 % carbamide peroxide for 3 weeks. The patients were divided into an experimental group (EG, smoking patients) and a control group (CG, nonsmoking patients). A Vita Easyshade® spectrophotometer was used to measure color variation one week, one month, 6 months and 9 months after whitening. The data obtained by spectrophotometry were analyzed with the Shapiro-Wilk and the Kolmogorov-Smirnov tests to evaluate the normality of the distribution, and then they were subjected to the Mann-Whitney-Wilcoxon U test (&#945; = 0,05).  Results: Delta L* was 2,3 (EG) and 3,66 (CG); delta values were estimated from data obtained 9 months vs. one week after whitening. No statistically significant differences were found between the groups.  Conclusions: No statistically significant color regression differences are found in either smoking or nonsmoking patients after home whitening with 10 % carbamide peroxide.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[blanqueamiento de dientes]]></kwd>
<kwd lng="es"><![CDATA[fumadores]]></kwd>
<kwd lng="es"><![CDATA[color]]></kwd>
<kwd lng="en"><![CDATA[tooth whitening]]></kwd>
<kwd lng="en"><![CDATA[smokers]]></kwd>
<kwd lng="en"><![CDATA[color]]></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[Carey]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tooth whitening: what we now know]]></article-title>
<source><![CDATA[J Evid Based Dent Pract]]></source>
<year>2014</year>
<volume>14</volume>
<numero>^sSuppl</numero>
<issue>^sSuppl</issue>
<supplement>Suppl</supplement>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alqahtani]]></surname>
<given-names><![CDATA[MQ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tooth-bleaching procedures and their controversial effects: A literature review]]></article-title>
<source><![CDATA[Saudi Dent J]]></source>
<year>2014</year>
<volume>26</volume>
<numero>2</numero>
<issue>2</issue>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernandez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Bersezio]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Bottner]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Avalos]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Godoy]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Inda]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Longevity, Esthetic Perception, and Psychosocial Impact of Teeth Bleaching by Low (6 %) Hydrogen Peroxide Concentration for In-office Treatment: A Randomized Clinical Trial]]></article-title>
<source><![CDATA[Operative dentistry]]></source>
<year>2017</year>
<volume>42</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[de Geus]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Kossatz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Loguercio]]></surname>
<given-names><![CDATA[AD]]></given-names>
</name>
<name>
<surname><![CDATA[Reis]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of At-home Bleaching in Smokers: 30-month Follow-up]]></article-title>
<source><![CDATA[Operative dentistry]]></source>
<year>2017</year>
<volume>42</volume>
<numero>6</numero>
<issue>6</issue>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[de Geus]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[de Lara]]></surname>
<given-names><![CDATA[MB]]></given-names>
</name>
<name>
<surname><![CDATA[Hanzen]]></surname>
<given-names><![CDATA[TA]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Loguercio]]></surname>
<given-names><![CDATA[AD]]></given-names>
</name>
<name>
<surname><![CDATA[Kossatz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[One-year follow-up of at-home bleaching in smokers before and after dental prophylaxis]]></article-title>
<source><![CDATA[J Dent]]></source>
<year>2015</year>
<volume>43</volume>
<numero>11</numero>
<issue>11</issue>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vano]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Derchi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Barone]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Genovesi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Covani]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tooth bleaching with hydrogen peroxide and nano-hydroxyapatite: a 9-month follow-up randomized clinical trial]]></article-title>
<source><![CDATA[Int J Dent Hyg]]></source>
<year>2015</year>
<volume>13</volume>
<numero>4</numero>
<issue>4</issue>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bersezio]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Ledezma]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Estay]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Mayer]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Rivera]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Color Regression and Maintenance Effect of Intracoronal Whitening on the Quality of Life: RCT-A One-year Follow-up Study]]></article-title>
<source><![CDATA[Operative dentistry]]></source>
<year>2019</year>
<volume>44</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mayhew]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Mendonca]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Murthy]]></surname>
<given-names><![CDATA[BVS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A review of ASA physical status - historical perspectives and modern developments]]></article-title>
<source><![CDATA[Anaesthesia]]></source>
<year>2019</year>
<volume>74</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>373-9</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[Tonetti]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cigarette smoking and periodontal diseases: etiology and management of disease]]></article-title>
<source><![CDATA[Ann Periodontol]]></source>
<year>1998</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>88-101</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[Vildosola]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Bottner]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Avalos]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Godoy]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Teeth bleaching with low concentrations of hydrogen peroxide (6 %) and catalyzed by LED blue (450 +/- 10 nm) and laser infrared (808 +/- 10 nm) light for in-office treatment: Randomized clinical trial 1-year follow-up]]></article-title>
<source><![CDATA[Journal of esthetic and restorative dentistry: official publication of the American Academy of Esthetic Dentistry]]></source>
<year>2017</year>
<volume>29</volume>
<numero>5</numero>
<issue>5</issue>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="">
<collab>ADA</collab>
<source><![CDATA[Tooth Whitening Products: ADA Statement on Safety and Effectiveness]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paravina]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
<name>
<surname><![CDATA[Ghinea]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Bona]]></surname>
<given-names><![CDATA[AD]]></given-names>
</name>
<name>
<surname><![CDATA[Igiel]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Linninger]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Color difference thresholds in dentistry]]></article-title>
<source><![CDATA[Journal of Esthetic and Restorative Dentistry: Official Publication of the American Academy of Esthetic Dentistry]]></source>
<year>2015</year>
<volume>27</volume>
<numero>^s1</numero>
<issue>^s1</issue>
<supplement>1</supplement>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
