Abstract

BackgroundThe purpose of this study evaluates and compares the effect of surface roughness (Ra) and color stability on computer-aided design/computer-aided manufacturing (CAD/CAM) hybrid resin (Vita Enamic), feldspathic (Vitablocs® Mark II), and lithium disilicate Zirconia (Vita Suprinity) glazed or polished ceramics immersed in hot Arabic Qahwa and cold coffee.MethodsA total of 96 standardized samples were prepared from CAD/CAM restorative materials. Half of the samples were polished as per the manufacturer’s instructions using a porcelain polishing kit, and the other half were glazed. Samples were distributed and immersed in hot Arabian Qahwa and cold coffee followed by thermocycling. Ra measurements and color changes were conducted before and after immersion. SEM images were captured from each type of glazed or polished ceramic. One-way ANOVA paired Student’s t-test, and Bonferroni test were conducted to detect significant difference between the groups. P > 0.05 was a significant level.ResultsOf all the tested samples, Ra increased without any significant difference; however, mean color changes (ΔE*) showed significant differences. An increase in Ra was noted for all the glazed and polished samples after immersion and thermocycling. However, differences were significant only in VM II. In addition, ΔE* was significant only in Vita Suprinity (VS) samples. For immersion groups, significant Ra changes were noticed in glazed samples, only in Vita Enamic (VE) with no ΔE*. In polished samples, mean Ra changes were observed in VM II and VS samples. Significant differences were also noticed in polished VE and VS subgroups of ΔE*.ConclusionsRa affects all the tested samples, providing higher values on the polished specimens. The ΔE* caused by hot Arabic Qahwa and cold coffee on glazed or polished CAD/CAM restorative materials were clinically acceptable.

Highlights

  • The purpose of this study evaluates and compares the effect of surface roughness (Ra) and color stability on computer-aided design/computer-aided manufacturing (CAD/CAM) hybrid resin (Vita Enamic), feldspathic (Vitablocs® Mark Vitablocs Mark II (II)), and lithium disilicate Zirconia (Vita Suprinity) glazed or polished ceramics immersed in hot Arabic Qahwa and cold coffee

  • The Bonferroni post hoc test was conducted for multiple comparisons between the three CAD/CAM restorative materials, which showed significant differences in the Mean color changes (ΔE) values between the tested CAD/CAM restorative materials with a p-value < 0.001

  • Mean color changes higher values were noticed for Vita Suprinity (VS) group but within range of clinical acceptance

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Summary

Introduction

The purpose of this study evaluates and compares the effect of surface roughness (Ra) and color stability on computer-aided design/computer-aided manufacturing (CAD/CAM) hybrid resin (Vita Enamic), feldspathic (Vitablocs® Mark II), and lithium disilicate Zirconia (Vita Suprinity) glazed or polished ceramics immersed in hot Arabic Qahwa and cold coffee. Computer-aided design/ computer-aided manufacturing (CAD/CAM) materials have been developed to fabricate the all-ceramic restoration materials. Alp et al [12] showed that the surface treatments using the Vita Suprinity (VS) restorative materials are clinically acceptable for color changes after coffee staining and thermocycling. Egilmez et al [13] stated that CAD/CAM Vita Enamic (VE) restorative materials exhibited different Ra values and surface topographies. Al Moaleem et al [14] showed a higher significant effect on Ra of CAD/ CAM Zirconia compared to feldspathic ceramic, manually or machinable packed CAD/CAM materials

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