Effect of Cement Translucency and Ceramic Thickness on the Resulting Colour Match of Zirconia-Reinforced Lithium Silicate Restorations Cemented over Dark-Coloured Substrate

Document Type : Original Article

Authors

1 Lecturer of Crowns and bridges, faculty of dental medicine for girls,Al Azhar University, Cairo, Egypt

2 Lecturer of Operative Dentistry, Faculty of Oral and Dental Medicine, Badr University, Cairo Eygpt

3 Lecturer of Dental Biomaterials, Dental Biomaterials Department, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt

Abstract

Objective: Vita Suprinity zirconia-reinforced lithium silicate dental ceramics were tested using various thicknesses and hues of resin cement to determine how well they could disguise colour. Materials and Methods: Fifty-four (Vita Suprinity) ceramic discs with different thicknesses (0.5, 1 and 1.5mm thickness) were used, eighteen discs in each group were then subdivided into two equal subgroups (n=9) according to the cement shade used (translucent or opaque), one discolored substrate (C4) was used. Translucency parameter (TP) and colour difference (∆E before and after cementation to the substrate) were evaluated by spectrophotometer. Results: The three groups of ceramic thicknesses did not differ statistically significantly in terms of the translucency parameter, however there was a statistically significant difference between the two investigated colours of resin cement (translucent and opaque). Between the three groups, there was no statistically significant difference in the colour change (∆E). Conclusions: Between the three various ceramic thicknesses that were employed, there was no statistically significant variation in the translucency parameter (TP). The colour changes (∆E) for the three dental ceramic thicknesses utilized were within the clinically acceptable range (3.33). Accordingly, no matter what colour the luting agent was, Vita Suprinity measured thicknesses showed enough colour masking capacity to cover up the discoloured substrate (C 4) that was being employed.

Keywords

Al-Azhar Journal of Dental Science
Volume 27, Issue 1 - Serial Number 1
January - Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)
January 2024
Pages 59-69

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