en Prosthodontics Prosthodontics Original article Original article <div style="text-align: justify;"><span style="font-size:12pt"><span style="font-family:Calibri,sans-serif"></span></span><span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Background and Aim</span></span></span></b><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">:</span></span></span></b> <span style="font-size:9.0pt"><span style="font-family:" verdana="">This study aimed to assess the effects of chlorhexidine (CHX) and Listerine mouthwashes on color stability of glazed bilayer zirconia and IPs e.max ceramics.</span></span></span></span><br> <span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Materials and Methods: </span></span></span></b><span style="font-size:9.0pt"><span style="font-family:" verdana="">This in vitro experimental study was conducted on 36 glazed bilayer zirconia and IPS e.max ceramic specimens. The baseline CIE L*a*b* color parameters of specimens were measured by a spectrophotometer. The bilayer zirconia and IPS e.max ceramic specimens were then randomly assigned to two subgroups for immersion in 10 mL of 0.2% CHX (n=9) and 10 mL of Listerine (n=9). The specimens were immersed in the respective solutions for 2 minutes daily for 7 days. Next, their color parameters were spectrophotometrically measured again. The color change (∆E) of ceramics in the three groups was calculated and compared by the Kruskal-Wallis test and two-way ANOVA (alpha=0.05). </span></span>&nbsp;&nbsp;</span></span><br> <span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Results: </span></span></span></b><span style="font-size:9.0pt"><span style="font-family:" verdana="">The L*, a*, and b* color parameters of glazed bilayer zirconia and IPs e.max ceramic specimens were not significantly different at baseline (P=0.8) or after the intervention (P=0.6). The ∆E of the subgroups was not significantly different either (P>0.05).</span></span><span style="font-size:9.0pt"><span style="font-family:"Verdana",sans-serif"></span></span></span></span><br> <span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Conclusion:</span></span></span></b> <span style="font-size:9.0pt"><span style="font-family:" verdana="">Both glazed bilayer zirconia and IPs e.max ceramics showed clinically acceptable color stability (∆E<3.3) following immersion in CHX and Listerine mouthwashes.</span></span></span></span><br> <span style="font-size:12pt"><span style="font-family:Calibri,sans-serif"></span></span></div> Color, Chlorhexidine, Listerine, Mouthwashes, Ceramics 15 20 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-1240-1&slc_lang=en&sid=1 Gholamreza Esfahanizadeh r.esfahanizadeh@yahoo.com 100319475328460011809 100319475328460011809 No Department of Prosthodontics, Faculty of Dentistry, Tehran Medical Science, Islamic Azad University, Tehran, Iran Reza Kooshki bahareh.mohammadi.65@gmail.com 100319475328460011810 100319475328460011810 No Department of Prosthodontics, Faculty of Dentistry, Tehran Medical Science, Islamic Azad University, Tehran, Iran Hamed Karimipoor Hamed64karimi@gmail.com 100319475328460011811 0000000277809479 Yes Department of Prosthodontics, Faculty of Dentistry, Tehran Medical Science, Islamic Azad University, Tehran, Iran Verishe Rastin v.rastin@yahoomail.com 100319475328460011812 0000000195620656 No Department of Prosthodontics, Faculty of Dentistry, Tehran Medical Science, Islamic Azad University, Tehran, Iran