<?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>1646-2890</journal-id>
<journal-title><![CDATA[Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Port Estomatol Med Dent Cir Maxilofac]]></abbrev-journal-title>
<issn>1646-2890</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Estomatologia e Medicina Dentária]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1646-28902023000100003</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2023.02.1047</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Translucency and color differences of polycrystalline ceramic materials before and after layering]]></article-title>
<article-title xml:lang="pt"><![CDATA[Translucidez e diferenças de cor de materiais cerâmicos policristalinos antes e depois da estratificação]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Roque]]></surname>
<given-names><![CDATA[João Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hermínio]]></surname>
<given-names><![CDATA[Joana Lima]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Viegas]]></surname>
<given-names><![CDATA[Diogo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[João]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Lisboa Faculdade de Medicina Dentária Unidade de Investigação em Ciências Orais e Biomédicas (UICOB)]]></institution>
<addr-line><![CDATA[Lisbon ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de Lisboa Faculdade de Medicina Dentária ]]></institution>
<addr-line><![CDATA[Lisbon ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade de Lisboa Instituto Superior Técnico Department of Chemical Engineering and ICEMS]]></institution>
<addr-line><![CDATA[Lisbon ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<volume>64</volume>
<numero>1</numero>
<fpage>3</fpage>
<lpage>11</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902023000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902023000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902023000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective:  To evaluate the transmittance (%T) and color difference (&#916;E*) of six zirconia core materials compared to alumina, over eight colored substrates before and after ceramic application.  Methods:  Experimental groups (n=5) of standardized disk-shaped cores of alumina, white zirconia, medium-colored zirconia, Ice Translucent, and Prettau (white and D3 colored) were veneered to a uniform thickness to convenient color by layering. Their %T and &#916;E* over eight different substrates were determined before and after glazing. Data were analyzed with Kruskal-Wallis and Mann-Whitney tests (&#945;&lt;0.05).  Results:  %T and &#916;E* values were significantly different (p&lt;0.001) before and after ceramic application for all materials. Regarding %T, Prettau white zirconia was the most affected, overpassing alumina. Colored zirconia cores decreased %T equally. In terms of &#916;E*, zirconia materials initially performed high above the clinically acceptable threshold but were under it after ceramics application. White zirconia was the only material to perform below the clinical perceptibility threshold. Alumina initially performed under the clinically acceptable threshold for two substrates, but after ceramic application, only performed under the clinical perceptibility threshold over four. Substrates influenced &#916;E* values of all core materials but were only evident on three of them.  Conclusions:  Core materials influenced %T and &#916;E* values. Colored zirconia cores showed less %T than white cores and both less than alumina before and after ceramic application. After ceramic application, all materials performed under the clinically acceptable threshold over all the substrates. Substrates have more influence on &#916;E* values before ceramic application.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objetivo:  Avaliar a transmitância (%T) e diferença de cor (&#916;E*) de seis núcleos de zircónia em relação à alumina, em oito substratos coloridos antes e após aplicação de cerâmica.  Métodos:  Produziram-se núcleos em forma de disco (n=5) de alumina, zircónia branca, zircónia de cor média, Ice Translucent e Prettau (branco e colorido D3) com espessura uniforme para determinar a cor por estratificação. Antes e depois, determinou-se a %T e a &#916;E* em oito substratos. Os dados foram analisados com testes de Kruskal-Wallis e Mann-Whitney (&#945;&lt;0,05).  Resultados:  Os valores de %T e &#916;E* foram significativamente diferentes (p&lt;0,001) antes e após a aplicação da cerâmica. Relativamente à %T, a zircónia branca Prettau foi a mais afetada, ultrapassando a alumina. As zircónias coloridas diminuíram equitativamente. Quanto à &#916;E*, as zircónias estavam inicialmente acima do limite de aceitabilidade clínica e abaixo deste após aplicação da cerâmica. A zircónia branca ficou abaixo do limiar de impercetibilidade clínica. A alumina inicialmente apresentou-se abaixo do limite de aceitabilidade clínica para dois substratos, mas abaixo do limite de impercetibilidade clínica para quatro após aplicação da cerâmica. Os substratos influenciaram a &#916;E* de todos sendo evidentes em três.  Conclusões:  Os materiais influenciam a %T e a &#916;E*. A zircónia colorida apresentou menor %T que a branca e ambas menos que a alumina, antes e após a aplicação da cerâmica. Todos os materiais se apresentaram dentro do limite de aceitabilidade clínica após a aplicação da cerâmica. Os substratos têm mais influência na &#916;E* antes da aplicação da cerâmica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Alumina]]></kwd>
<kwd lng="en"><![CDATA[Ceramic]]></kwd>
<kwd lng="en"><![CDATA[Color]]></kwd>
<kwd lng="en"><![CDATA[Dental Materials]]></kwd>
<kwd lng="en"><![CDATA[Zirconia]]></kwd>
<kwd lng="pt"><![CDATA[Alumina]]></kwd>
<kwd lng="pt"><![CDATA[Cerâmica]]></kwd>
<kwd lng="pt"><![CDATA[Cor]]></kwd>
<kwd lng="pt"><![CDATA[Materiais dentários]]></kwd>
<kwd lng="pt"><![CDATA[Zircónia]]></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[Lim]]></surname>
<given-names><![CDATA[HN]]></given-names>
</name>
<name>
<surname><![CDATA[Yu]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[YK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectroradiometric and spectrophotometric translucency of ceramic materials]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2010</year>
<volume>104</volume>
<page-range>239-46</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sahin]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Uludag]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Usumez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ozkir]]></surname>
<given-names><![CDATA[SE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of repeated firings on the color of an alumina ceramic system with two different veneering porcelain shades]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2010</year>
<volume>104</volume>
<page-range>372-8</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zarone]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Russo]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sorrentino]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[From porcelain-fused-tometal to zirconia: Clinical and experimental considerations]]></article-title>
<source><![CDATA[Dent Mater]]></source>
<year>2011</year>
<volume>27</volume>
<page-range>83-96</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[Guazzato]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Walton]]></surname>
<given-names><![CDATA[TR]]></given-names>
</name>
<name>
<surname><![CDATA[Franklin]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Davis]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Bohl]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Klineberg]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of thickness and cooling rate on development of spontaneous cracks in porcelain/zirconia structures]]></article-title>
<source><![CDATA[Aust Dent J]]></source>
<year>2010</year>
<volume>55</volume>
<page-range>306-10</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carter]]></surname>
<given-names><![CDATA[CB]]></given-names>
</name>
<name>
<surname><![CDATA[Norton]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
</person-group>
<source><![CDATA[Ceramic Materials: Science and Engineering]]></source>
<year>2007</year>
<publisher-name><![CDATA[Springer Science&amp; Business Media]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sadan]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Blatz]]></surname>
<given-names><![CDATA[MB]]></given-names>
</name>
<name>
<surname><![CDATA[Lang]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinical considerations for densely sintered alumina and zirconia restorations: Part 1]]></article-title>
<source><![CDATA[Int J Periodontics Restorative Dent]]></source>
<year>2005</year>
<volume>25</volume>
<page-range>213-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baldissara]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Llukacej]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ciocca]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Valandro]]></surname>
<given-names><![CDATA[FL]]></given-names>
</name>
<name>
<surname><![CDATA[Scotti]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Translucency of zirconia copings made with different CAD/ CAM systems]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2010</year>
<volume>104</volume>
<page-range>6-12</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[Y&#305;lmaz Sava&#351;]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Aykent]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of fabrication techniques on the optical properties of zirconia-based systems]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2021</year>
<volume>125</volume>
<page-range>528.e1-8</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[Al Hamad]]></surname>
<given-names><![CDATA[KQ]]></given-names>
</name>
<name>
<surname><![CDATA[Obaidat]]></surname>
<given-names><![CDATA[II]]></given-names>
</name>
<name>
<surname><![CDATA[Baba]]></surname>
<given-names><![CDATA[NZ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Effect of Ceramic Type and Background Color on Shade Reproducibility of All&#8208;Ceramic Restorations]]></article-title>
<source><![CDATA[J Prosthodont]]></source>
<year>2020</year>
<volume>29</volume>
<page-range>511-7</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[Odman]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Andersson]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Procera AllCeram crowns followed for 5 to 10.5 years: a prospective clinical study]]></article-title>
<source><![CDATA[Int J Prosthodont]]></source>
<year>2001</year>
<volume>14</volume>
<page-range>504-9</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[Gomes]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[LP]]></given-names>
</name>
<name>
<surname><![CDATA[Fonseca]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of zirconia pigmentation on translucency]]></article-title>
<source><![CDATA[Eur J Prothodont Restor Dent]]></source>
<year>2018</year>
<volume>26</volume>
<page-range>136-42</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[Shah]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Holloway]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Denry]]></surname>
<given-names><![CDATA[IL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of Coloring with Various Metal Oxides on the Microstructure, Color, and Flexural Strength of 3Y-TZP]]></article-title>
<source><![CDATA[J Biomed Mater Res B Appl Biomater]]></source>
<year>2008</year>
<volume>87</volume>
<page-range>329-37</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ebeid]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Wille]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Hamdy]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Salah]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[El-Etreby]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Kern]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of changes in sintering parameters on monolithic translucent zirconia]]></article-title>
<source><![CDATA[Dent Mater]]></source>
<year>2014</year>
<volume>30</volume>
<page-range>e419-24</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[Luo]]></surname>
<given-names><![CDATA[XP]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of veneering techniques on color and translucency of Y-TZP]]></article-title>
<source><![CDATA[J Prosthodont]]></source>
<year>2010</year>
<volume>19</volume>
<page-range>465-70</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al-Wahadni]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Shahin]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Kurtz]]></surname>
<given-names><![CDATA[KS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An In Vitro Investigation of Veneered Zirconia-Based Restorations Shade Reproducibility]]></article-title>
<source><![CDATA[J Prosthodont]]></source>
<year>2018</year>
<volume>27</volume>
<page-range>347-54</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Spyropoulou]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
<name>
<surname><![CDATA[Giroux]]></surname>
<given-names><![CDATA[EC]]></given-names>
</name>
<name>
<surname><![CDATA[Razzoog]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Duff]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Translucency of shaded zirconia core material]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2011</year>
<volume>105</volume>
<page-range>304-7</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Heffernan]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Aquilino]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Diaz-Arnold]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Haselton]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
<name>
<surname><![CDATA[Stanford]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relative translucency of six all-ceramic systems. Part II: Core and veneer materials]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2002</year>
<volume>88</volume>
<page-range>10-5</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brodbelt]]></surname>
<given-names><![CDATA[RHW]]></given-names>
</name>
<name>
<surname><![CDATA[O&#8217;brien]]></surname>
<given-names><![CDATA[WJ]]></given-names>
</name>
<name>
<surname><![CDATA[Fan]]></surname>
<given-names><![CDATA[PL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Translucency of Dental Porcelains]]></article-title>
<source><![CDATA[J Dent Res]]></source>
<year>1980</year>
<volume>59</volume>
<page-range>70-5</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Suputtamongkol]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Tulapornchai]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mamani]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kamchatphai]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Thongpun]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of the shades of background substructures on the overall color of zirconia-based allceramic crowns]]></article-title>
<source><![CDATA[J Adv Prosthodont]]></source>
<year>2013</year>
<volume>5</volume>
<page-range>319-25</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</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[Pérez]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Ghinea]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Acceptability and perceptibility thresholds in dentistry: A comprehensive review of clinical and research applications]]></article-title>
<source><![CDATA[J Esthet Restor Dent]]></source>
<year>2019</year>
<volume>31</volume>
<page-range>103-12</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Khashayar]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Bain]]></surname>
<given-names><![CDATA[PA]]></given-names>
</name>
<name>
<surname><![CDATA[Salari]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Dozic]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Kleverlaan]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
<name>
<surname><![CDATA[Feilzer]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Perceptibility and acceptability thresholds for colour differences in dentistry]]></article-title>
<source><![CDATA[J Dent]]></source>
<year>2014</year>
<volume>42</volume>
<page-range>637-44</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mendes]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Arantes-Oliveira]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mesquita]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Shear bond strength of orthodontic brackets to fluorosed enamel]]></article-title>
<source><![CDATA[Rev Port Estomatol Med Dent Cir Maxilofac]]></source>
<year>2014</year>
<volume>55</volume>
<page-range>73-7</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tabatabaian]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Color in Zirconia-Based Restorations and Related Factors: A Literature Review]]></article-title>
<source><![CDATA[J Prosthodont]]></source>
<year>2018</year>
<volume>27</volume>
<page-range>201-11</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vichi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Louca]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Corciolani]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrari]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Color related to ceramic and zirconia restorations: A review]]></article-title>
<source><![CDATA[Dent Mater]]></source>
<year>2011</year>
<volume>27</volume>
<page-range>97-108</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ban]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reliability and properties of core materials for all-ceramic dental restorations]]></article-title>
<source><![CDATA[Jpn Dent Sci Rev]]></source>
<year>2008</year>
<volume>44</volume>
<page-range>3-21</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jardel]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Grignoux]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Realisation de restaurations céramocéramique en zircone Prettau à laide su systeme panthograph Zirkonzahn en pratique journaliére]]></article-title>
<source><![CDATA[Quintessence Rev Int Próthese Déntaire]]></source>
<year>2011</year>
<volume>3</volume>
<page-range>226-35</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Ahn]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[HY]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[WC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of the sintering conditions of dental zirconia ceramics on the grain size and translucency]]></article-title>
<source><![CDATA[J Adv Prosthodont]]></source>
<year>2013</year>
<volume>5</volume>
<page-range>161-6</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Aquilino]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Gratton]]></surname>
<given-names><![CDATA[DG]]></given-names>
</name>
<name>
<surname><![CDATA[Ou]]></surname>
<given-names><![CDATA[KL]]></given-names>
</name>
<name>
<surname><![CDATA[Lin]]></surname>
<given-names><![CDATA[CC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relative Translucency and Surface Roughness of Four Yttriumstabilized Tetragonal Zirconia Polycrystalline-based Dental Restorations]]></article-title>
<source><![CDATA[J Exp Clin Med]]></source>
<year>2013</year>
<volume>5</volume>
<page-range>22-4</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nakamura]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Saito]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Fuyikawa]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ishigaki]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of abutment substrate and ceramic thickness on the colour of heat-pressed ceramic crowns]]></article-title>
<source><![CDATA[J Oral Rehabil]]></source>
<year>2002</year>
<volume>29</volume>
<page-range>805-9</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shimada]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Nakazawa]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kakehashi]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Matsumura]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of abutment materials on the resultant color of heat-pressed lithium disilicate ceramics]]></article-title>
<source><![CDATA[Dent Mater J]]></source>
<year>2006</year>
<volume>25</volume>
<page-range>20-5</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Q]]></given-names>
</name>
<name>
<surname><![CDATA[Yu]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[YN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectrophotometric evaluation of the optical influence of core build-up composites on all-ceramic materials]]></article-title>
<source><![CDATA[Dent Mater]]></source>
<year>2009</year>
<volume>25</volume>
<page-range>158-65</page-range></nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Terzio&#287;lu]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Yilmaz]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Yurdukoru]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of diferente shades of specific luting agents and IPS empress ceramic thickness on overall color]]></article-title>
<source><![CDATA[Int J Periodontics Restorative Dent]]></source>
<year>2009</year>
<volume>29</volume>
<page-range>499-505</page-range></nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Da Silva]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
<name>
<surname><![CDATA[Sakai]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kristiansen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ishikawa-Nagai]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The optical effect of composite luting cement on all ceramic crowns]]></article-title>
<source><![CDATA[J Dent]]></source>
<year>2009</year>
<volume>3</volume>
<page-range>937-43</page-range></nlm-citation>
</ref>
<ref id="B34">
<label>34</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cubas GB de]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Camacho]]></surname>
<given-names><![CDATA[GB]]></given-names>
</name>
<name>
<surname><![CDATA[Demarco]]></surname>
<given-names><![CDATA[FF]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira-Cenci]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of luting agents and ceramic thickness on the color variation of different ceramics against a chromatic background]]></article-title>
<source><![CDATA[Eur J Dent]]></source>
<year>2011</year>
<volume>5</volume>
<page-range>245-52</page-range></nlm-citation>
</ref>
<ref id="B35">
<label>35</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ilie]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Stawarczyk]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quantification of the amount of light passing through zirconia: The effect of material shade, thickness, and curing conditions]]></article-title>
<source><![CDATA[J Dent]]></source>
<year>2014</year>
<volume>42</volume>
<page-range>684-90</page-range></nlm-citation>
</ref>
<ref id="B36">
<label>36</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[O&#8217;Brien]]></surname>
<given-names><![CDATA[WJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Double layer effect and other optical phenomena related to esthetics]]></article-title>
<source><![CDATA[Dent Clin North Am]]></source>
<year>1985</year>
<volume>29</volume>
<page-range>667-72</page-range></nlm-citation>
</ref>
<ref id="B37">
<label>37</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mclean]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[New Dental Ceramics and Esthetics]]></article-title>
<source><![CDATA[J Esthet Restor Dent]]></source>
<year>1995</year>
<volume>7</volume>
<page-range>141-9</page-range></nlm-citation>
</ref>
<ref id="B38">
<label>38</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guazzato]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Proos]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Quach]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Swain]]></surname>
<given-names><![CDATA[MV]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Strength, reliability and mode of fracture of bilayered porcelain/zirconia (Y-TZP) dental ceramics]]></article-title>
<source><![CDATA[Biomaterials]]></source>
<year>2004</year>
<volume>25</volume>
<page-range>5045-52</page-range></nlm-citation>
</ref>
<ref id="B39">
<label>39</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carossa]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Lombardo]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Pera]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Corsalini]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rastello]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Preti]]></surname>
<given-names><![CDATA[PG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of posts and cores on light transmission through different all-ceramic crowns: spectrophotometric and clinical evaluation]]></article-title>
<source><![CDATA[Int J Prosthodont]]></source>
<year>2001</year>
<volume>14</volume>
<page-range>9-14</page-range></nlm-citation>
</ref>
<ref id="B40">
<label>40</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bettencourt]]></surname>
<given-names><![CDATA[AF]]></given-names>
</name>
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ribeiro]]></surname>
<given-names><![CDATA[IAC]]></given-names>
</name>
<name>
<surname><![CDATA[Gonçalves]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Arias-Moliz]]></surname>
<given-names><![CDATA[MT]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development of a chlorhexidine delivery sustem based on dental reline acrylic resins]]></article-title>
<source><![CDATA[Int J Pharm]]></source>
<year>2023</year>
<volume>631</volume>
<page-range>122470</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
