Masking ability of different ceramics upon various underlying structures (original) (raw)

Journal of Esthetic and Restorative Dentistry, 2022

Abstract

ObjectiveTo evaluate masking ability of different types and thicknesses of ceramics upon various substructures.Materials and MethodsDiscs (Ø 12 mm, thickness 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm) were prepared from Bruxzir‐Anterior® (Bc), Celtra‐DUO® (Cc), and Vita‐Suprinity® (Vc) (n = 15/group). Substructures (2 mm thickness) were prepared from natural dentine (Ds), tetracycline‐stained dentine (Ts), zirconia (Zs), resin composite (Rs), and cast metal (Ms). A spectrophotometer was used to measure the CIE L*a*b* color coordinates of a specimen. Masking ability was determined from the color difference (∆E00) of ceramics between before‐ and after combining with substructure using ANOVA and Bonferroni test (α = 0.05). ∆E00 value was compared with acceptable clinical threshold (∆E00 = 1.8) and an ideal threshold (∆E00 = 0.8).ResultsType‐thickness of ceramics and substructures were significantly affected ∆E00. Ts significantly influenced ∆E00 more than Rs, Ms, Zs, and Ds. No significant ∆E00 upon Ms and Zs was indicated. Bc completely masked Ts and Rs if thickness was ≥0.6 mm, and Zs, Ms, and Ds if ≥0.4 mm. Cc completely masked Ts and Rs if thickness was >1.6 mm, and Zs, Ms, and Ds if >1.4 mm. Vc completely masked Ts if thickness was >1.4 mm, Rs and Ms if >1.2 mm, and Zs and Ds if >1 mm.ConclusionTs is the most influential substructure impact on color appearance, requiring a minimum thickness of 0.6 mm Bc, 1.2 mm Vc, or 1.6 mm Cc to be perfectly masked.Clinical SignificanceMasking ability was significantly influenced by the type and thickness of ceramic material and underlying structure. Monolithic zirconia had a significantly higher masking ability than lithium silicate/phosphate glass ceramic. Ts indicated the most influencial substructure impacting the color appearance of ceramic restoration, which require a minimum thickness of 0.6 mm Bc, 1.2 mm Vc, or 1.6 mm Cc to achieve ideal masking capability.

Niwut Juntavee hasn't uploaded this paper.

Let Niwut know you want this paper to be uploaded.

Ask for this paper to be uploaded.