Spectrophotometric examination of the optical effects of monolithic multilayered zirconia with different substrates

Abstract

The goal of this study is to examine specific optical effects of multilayered and coloured monolithic zirconia considering thickness and substrates of different colours using one of the most advanced spectrophotometers of the world. Multilayered zirconia specimens were used for the study with the thickness range of 0.5-2.5 mm and six types of substrate materials and three types of metal substrates. Measurements were carried out at Budapest Technical University with a PerkinElmer®Lambda1050UV/Vis/NIR spectrophotometer. The substrate colour and the thickness of zirconia affects the optical results, with special regard to colour perceptibility and acceptability. Monochromatic and multilayer zirconia show both similarities and discrepancies in behaviour, i.e. spectral reflectance and ΔE. Owing to the multi-coloured characteristics of multilayered zirconia the optical effect of the substrate less predictable than in the case of monochromatic zirconia thus requiring more detailed planning and implementation.

Effect of thickness, translucency, and substrates on the masking ability of a polymer‐infiltrated ceramic‐network material

“…18,20 Regarding the final appearance of monolithic zirconia restorations, studies emphasize the effect of abutment color, ceramic thickness, and their combined effect. 19,22,23 A research that compared the masking ability of monolithic zirconias and zirconiareinforced lithium-silicate glass ceramics with different layer thicknesses confirmed the influence of layer thickness and abutment color in addition to the better masking ability of monolithic zirconias. 24 Although PICN hybrid ceramics have been available on the market for 10 years, there is a lack of information regarding their masking ability.…”

“…During the examination of lithium‐disilicate glass ceramics, it was found that the color of the abutment, the thickness of the ceramic and the color of the cement significantly influence the color of the restoration 18,20 . Regarding the final appearance of monolithic zirconia restorations, studies emphasize the effect of abutment color, ceramic thickness, and their combined effect 19,22,23 . A research that compared the masking ability of monolithic zirconias and zirconia‐reinforced lithium‐silicate glass ceramics with different layer thicknesses confirmed the influence of layer thickness and abutment color in addition to the better masking ability of monolithic zirconias 24 .…”

“…In the case of all-ceramic systems, several studies have examined factors affecting the esthetics of the final restoration, such as the color of the abutment, the thickness and translucency of the ceramic, and the color and layer thickness of the luting cement. [18][19][20][21][22][23][24][25][26][27][28][29][30] During the examination of lithium-disilicate glass ceramics, it was found that the color of the abutment, the thickness of the ceramic and the color of the cement significantly influence the color of the restoration. 18,20 Regarding the final appearance of monolithic zirconia restorations, studies emphasize the effect of abutment color, ceramic thickness, and their combined effect.…”

“…In the case of materials with translucent properties, the appearance of the restoration is not determined solely by its material, but by everything that is located behind or under it. In the case of all‐ceramic systems, several studies have examined factors affecting the esthetics of the final restoration, such as the color of the abutment, the thickness and translucency of the ceramic, and the color and layer thickness of the luting cement 18–30 . During the examination of lithium‐disilicate glass ceramics, it was found that the color of the abutment, the thickness of the ceramic and the color of the cement significantly influence the color of the restoration 18,20 .…”

Monolitikus cirkónium-dioxid fogpótlások anyagának spektrofotometriai vizsgálata

“…A Semmelweis Egyetem Fogpótlástani Klinikája 2013 óta vizsgálja a különböző kerámiák optikai tulajdonságait [1,2,7]. A vizsgálatok célja kimutatni, hogy a különböző színű csonkok hogyan befolyásolják a restau rá tum végleges színét a kerámia vastagsága és transz lu cenci á ja, valamint a ragasztócement optikai tulajdonságainak függvényében.…”