Efeito da intensidade de fontes de luz e barreiras de cerâmica na microdureza de cimento resinoso dual / Effect of intensity of light sources and barriers in ceramic hardness of dual-cured cement
Fonseca, Gabriela Santos; Correia, Ayla Macyelle de Oliveira; Griza, Sandro; Villarroel, Milko; Takeshita, Wilton Mitsunari; Mendonça, Adriano Augusto Melo de.
<h2>Conclusão:</h2> O tipo de <a class="decs" id="002553">cerâmica</a> e a intensidade da fonte de <a class="decs" id="008203">luz</a> influenciam na microdureza do cimento. A intensidade de 1.000 mW/cm2 sobre as <a class="decs" id="002553">cerâmicas</a> à base de zircônia e espinélio MgAl2O4 resultaram na melhor combinação de valores de <a class="decs" id="006396">dureza</a> do cimento.
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<div id="mark_ab_en" class="tabcontent abstract" style="display: none" lang="en">
<h2>Introduction:</h2> The dual-<a class="decs" id="026402">cure</a> <a class="decs" id="033084">resin cement</a> is the main material for luting of <a class="decs" id="002553">ceramic</a>. However, factors such as <a class="decs" id="008203">light</a> source can influence the performance of the cement. <h2>Objective:</h2> Evaluate the influence of two <a class="decs" id="008203">light</a> sources of different intensities on the microhardness of a <a class="decs" id="033084">resin cement</a> when cured under different <a class="decs" id="002553">ceramics</a>. Material and <h2>method:</h2> Forty samples of dual <a class="decs" id="033084">resin cement</a> were photoactivated by two LED <a class="decs" id="008203">light</a> sources, with <a class="decs" id="008203">light</a> intensity of 1000mW/cm² and 800mW/cm², respectively (40 seconds), under the base <a class="decs" id="002553">ceramic</a> Zirconia, Spinel MgAl2O4 and <a class="decs" id="008267">Lithium</a> Disilicate. In the <a class="decs" id="028572">control group</a>, a <a class="decs" id="006038">glass</a> plate was used. Each samples had the surface grounded (600 and 1200). After dry storage in the dark (24 hours), Vickers microhardness measurements were performed (HMV Shimadzu - 50gf/10 seconds). The data were submitted to factorial <a class="decs" id="028620">ANOVA</a> and Tukey's test with significance level of 5%. <h2>Result:</h2> The average <a class="decs" id="006396">hardness</a> and standard deviation in the <a class="decs" id="028572">control group</a> for cement polymerized 1000mW/cm² was 43.9±1.5 and 800mW/cm² the value of 43.4±1.3. The lowest value was for the <a class="decs" id="002553">Ceramic</a> base of spinel MgAl2O4, <a class="decs" id="008203">light</a> cured with 800mW/cm² with a value of 34.3±3.3. <h2>Conclusion:</h2> The <a class="decs" id="002553">ceramic</a> type and intensity of the <a class="decs" id="008203">light</a> source influence the <a class="decs" id="006396">hardness</a> of the cement. The <a class="decs" id="054315">polymerization</a> 1000mW/cm2 on the <a class="decs" id="002553">ceramic</a> based on zirconia and spinel MgA2O4 resulted in the best combination of <a class="decs" id="006396">hardness</a> cement.
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<h4>Assuntos</h4>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Cerâmica"'>Cerâmica</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Análise de Variância"'>Análise de Variância</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Cimentos de Resina"'>Cimentos de Resina</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Lâmpadas de Polimerização Dentária"'>Lâmpadas de Polimerização Dentária</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Testes de Dureza"'>Testes de Dureza</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Resinas Compostas"'>Resinas Compostas</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Esmalte Dentário"'>Esmalte Dentário</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Dentina"'>Dentina</a>
<a href='https://pesquisa.bvsalud.org/odontologia/?lang=pt&q=mh:"Polimerização"'>Polimerização</a>
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Rev. odontol. UNESP (Online)
; 44(4): 207-212, jul.-ago. 2015. tab
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em Português
| LILACS, BBO - odontologia (Brasil) | ID: lil-755990