{"title":"Effect of Different Surface Finishing Procedures on Color Stability of Leucite-reinforced Feldspathic CAD-CAM Ceramic","authors":"İpek Balevi Akkese, Tuba Yılmaz Savaş, B. Piskin","doi":"10.54995/asc.2.2.6","DOIUrl":null,"url":null,"abstract":"Statement of the problem: The color stability of newly introduced leucite-\nreinforced feldspathic CAD-CAM ceramic with different surface treatments\nremains unclear.\nObjective: This in-vitro study aimed to examine the effect of different\nsurface finishing procedures on the color stability of leucite-reinforced feldspathic\nCAD-CAM ceramic.\nMaterials & Methods: Twenty-four monochromatic, leucite-reinforced,\nA2-shaded feldspathic ceramic specimens prepared in 1 mm thickness. The specimens\nwere randomly divided into 3 groups according to their surface finishing\nmethods (n=8): a control group without surface finishing (Group C), surface\nfinishing with polishing discs (Sof-Lex, 3M ESPE), and surface finishing\nwith glaze (Group G). All the specimens were immersed in a coffee solution and\nkept in an incubator at 37 °C for 14 days. Initial color measurements were made\nwith a digital spectrophotometer and the Commission Internationale de l'Eclairage\n(CIE) L*a*b* values were recorded. The color measurements were repeated\nat the ends of the 1st, 3rd, 7th, and 14th days with the spectrophotometer under\nthe same conditions. The color change of the specimens was calculated with the\nCIEDE2000 (ΔE00) formula. Statistical analysis of the data was performed with\na two-way mixed ANOVA and Bonferroni post-hoc tests (α=0.05).\nResults: Time and surface finishing procedures caused statistically significant\ncolor changes in the specimens (P<0.05). However, the interaction of\ntime and surface finishing was not statistically significant (P>0.05). The lowest\nmean ΔE00 value was observed in Group G on day 14 (0.93 ± 0.74); the highest\nmean ΔE00 value was found in Group P on the 3rd and 14th days (2.16 ± 0.72).\nWhile the C and G groups exhibited similar color change values, Group P caused\nhigher ΔE00 values compared to the glaze application (P<0.05).\nConclusions: Based on the findings of this study, glaze application led\nto less color change compared with disk polishing. Glazing can be preferred to\npolishing to ensure long-term color stability in leucite-reinforced feldspathic ceramics.","PeriodicalId":355146,"journal":{"name":"Kapadokya Üniversitesi","volume":"9 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Kapadokya Üniversitesi","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.54995/asc.2.2.6","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Statement of the problem: The color stability of newly introduced leucite-
reinforced feldspathic CAD-CAM ceramic with different surface treatments
remains unclear.
Objective: This in-vitro study aimed to examine the effect of different
surface finishing procedures on the color stability of leucite-reinforced feldspathic
CAD-CAM ceramic.
Materials & Methods: Twenty-four monochromatic, leucite-reinforced,
A2-shaded feldspathic ceramic specimens prepared in 1 mm thickness. The specimens
were randomly divided into 3 groups according to their surface finishing
methods (n=8): a control group without surface finishing (Group C), surface
finishing with polishing discs (Sof-Lex, 3M ESPE), and surface finishing
with glaze (Group G). All the specimens were immersed in a coffee solution and
kept in an incubator at 37 °C for 14 days. Initial color measurements were made
with a digital spectrophotometer and the Commission Internationale de l'Eclairage
(CIE) L*a*b* values were recorded. The color measurements were repeated
at the ends of the 1st, 3rd, 7th, and 14th days with the spectrophotometer under
the same conditions. The color change of the specimens was calculated with the
CIEDE2000 (ΔE00) formula. Statistical analysis of the data was performed with
a two-way mixed ANOVA and Bonferroni post-hoc tests (α=0.05).
Results: Time and surface finishing procedures caused statistically significant
color changes in the specimens (P<0.05). However, the interaction of
time and surface finishing was not statistically significant (P>0.05). The lowest
mean ΔE00 value was observed in Group G on day 14 (0.93 ± 0.74); the highest
mean ΔE00 value was found in Group P on the 3rd and 14th days (2.16 ± 0.72).
While the C and G groups exhibited similar color change values, Group P caused
higher ΔE00 values compared to the glaze application (P<0.05).
Conclusions: Based on the findings of this study, glaze application led
to less color change compared with disk polishing. Glazing can be preferred to
polishing to ensure long-term color stability in leucite-reinforced feldspathic ceramics.