en Restorative Dentistry Restorative Dentistry Original article Original article <div style="text-align: justify;"><span style="font-size:13pt"><span style="line-height:97%"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana=""><span style="color:#2e74b5">Background and Aim</span></span></span></span></b><b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana=""><span style="color:#2e74b5">:</span></span></span></span></b> <span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana="">There is a growing demand for esthetic dental treatments with composite resins like Ceram.x Spectra^TM ST^&reg; (CS) due to the importance of a beautiful smile; but color change may occur affecting the longevity and quality of composite restorations. The purpose of this study was to evaluate the color stability of a composite resin, subjected to two different polishing systems, after immersion in different coloring solutions (common beverages).</span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="line-height:97%"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana=""><span style="color:#2e74b5">Materials and Methods: </span></span></span></span></b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana="">Forty specimens were fabricated from CS nanoceramic composite resin and polished with Enhance^&reg; and Astropol^&reg; finishing and polishing systems. The CIE L*a*b* color parameters were measured before and after immersing the specimens in coffee, red wine, and Coca-Cola. The chromatic difference was assessed by calculating the ∆E. Two-way ANOVA was applied to compare the ∆E values based on the type of polishing system, coloring solution, and their interaction.</span></span></span>&nbsp;</span></span></span><br> <span style="font-size:13pt"><span style="line-height:97%"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana=""><span style="color:#2e74b5">Results: </span></span></span></span></b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana="">Astropol^&reg; resulted in better color stability and smoother surfaces than Enhance^&reg;. Wine and coffee significantly changed the color stability of tested composite resin (P<0.05), while Coca-Cola did not affect the color stability (P>0.05).</span></span></span><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:"Verdana",sans-serif"></span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="line-height:97%"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana=""><span style="color:#2e74b5">Conclusion:</span></span></span></span></b> <span style="font-size:9.0pt"><span style="line-height:97%"><span style="font-family:" verdana="">The choice of dental finishing and polishing system affects the color stability of CS composite resin following exposure to commonly consumed drinks. </span></span></span></span></span></span><br> &nbsp;</div> Composite Resins, Ceramics, Color, Dental Polishing 193 203 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-1376-1&slc_lang=en&sid=1 Ana Francisco a24247@alunos.cespu.pt 100319475328460012786 100319475328460012786 No University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Gandra PRD, Portugal. Tania Dey taniadey@hotmail.com 100319475328460012787 100319475328460012787 Yes Department of Science, South East Technological University, Cork Road Campus, Waterford, Ireland X91 K0EK. José Manuel Mendes jose.mendes@iucs.cespu.pt 100319475328460012788 100319475328460012788 No Oral Pathology and Reabilitation Researsh Unit (UNIPRO), University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Gandra PRD, Portugal. Arnaldo Sousa sousa.arnaldo@iucs.pt 100319475328460012789 100319475328460012789 No Oral Pathology and Reabilitation Researsh Unit (UNIPRO), University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Gandra PRD, Portugal. Orlanda Torres orlanda.torres@iucs.pt 100319475328460012790 100319475328460012790 No Oral Pathology and Reabilitation Researsh Unit (UNIPRO), University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Gandra PRD, Portugal.