Abstract:Objective: The aim of this in vitro study is to examine the optical effects of monolithic zirconia of different translucency and thickness, combined with substrates of different colours. Materials and methods: Zirconia specimens of two colours (A2P1, WHITE) were used for the study, three try-in pastes (Variolink Esthetic); substrates were prepared from nine types of materials (six VITA SIMULATE, three metals). Measurements were carried out at the Faculty of Atomic Physics of the Technical University of Budapes… Show more
“…The graph suggested a substantial variability in Δ E across substrate materials combined with ceramic layers in the lower thickness range (0.5–1.0 mm); however, at the mid- and high-range (1.5–2.5 mm) substrate colour was less influential. The Δ E value for the reference sample was zero, confirming the precision of the measurement [15]. Figure 4 Different zirconia (P1) layer thickness combined with different substrate materials.…”
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.
“…The graph suggested a substantial variability in Δ E across substrate materials combined with ceramic layers in the lower thickness range (0.5–1.0 mm); however, at the mid- and high-range (1.5–2.5 mm) substrate colour was less influential. The Δ E value for the reference sample was zero, confirming the precision of the measurement [15]. Figure 4 Different zirconia (P1) layer thickness combined with different substrate materials.…”
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.
“…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.…”
Bevezetés: Világszerte egyre szélesebb körben alkalmazzák a cirkónium-dioxid kerámiákat monolitikus fogpótlások anyagaként. A teljes kerámiarendszerek esetén a végleges restaurátum esztétikáját a kerámiaanyag színén túl olyan további tényezők is befolyásolják, mint a csonkszín, a kerámia vastagsága és transzlucenciája, illetve a cement színe és rétegvastagsága. Célkitűzés: A Semmelweis Egyetem Fogpótlástani Klinikájának és a Budapesti Műszaki és Gazdaságtudományi Egyetem Atomfizika Tanszékének közös in vitro kísérletének célja tanulmányozni, hogy a különböző árnyalatú és vastagságú monolitikus cirkónium-dioxid kerámiák optikai tulajdonságait milyen módon befolyásolja a csonkszín és a cementszín. Anyag és módszer: Vizsgálatunkhoz kétféle árnyalatú (A2P1, WHITE), ötféle rétegvastagságú cirkónium-dioxid mintát (Erran Tech), háromféle próbacementet (Variolink Esthetic Try-In Paste, Ivoclar Vivadent), kilencféle csonkanyagot (hat VITA Simulate, három fémtartalmú csonkanyag) használtunk fel. Méréseinket a Budapesti Műszaki és Gazdaságtudományi Egyetem Atomfizika Tanszékén lévő PerkinElmer LAMBDA 1050 UV/Vis/NIR spektrofotométerrel végeztük el. A színkülönbség (ΔE) számításához a CIEDE2000 képletet alkalmaztuk. Eredmények: 0,5 mm vastagságú A2P1-minták esetén az átlagos ΔE xΔE = 4,10 (σΔE = 2,91); 2,5 mm vastagság mellett xΔE = 1,88 (σΔE = 0,67). 0,5 mm vastagságú WHITE-minták esetén az átlagos ΔE xΔE = 6,40 (σΔE = 2,75); 2,5 mm vastagság mellett xΔE = 5,46 (σΔE = 0,79). Megbeszélés: A kutatás rámutatott arra, hogy a cirkónium-dioxid minták színezettsége és rétegvastagsága nagyban befolyásolja a fedőképességet, illetve 1,5 mm kerámiavastagság mellett a próbacementek szignifikáns színeltérést okoznak. A színezetlen cirkónium-dioxidok színét kevésbé befolyásolja a csonkszín, különösen 1,5 mm rétegvastagság felett. Következtetés: Elszíneződött csonkok monolitikus cirkónium-dioxid fogpótlással való fedése esetén a rétegvastagságnövelésével esztétikusabb végeredményt tudunk elérni a vizsgált színezett cirkónium-dioxid alkalmazása mellett.
“…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.…”
Section: Introductionmentioning
confidence: 99%
“…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 .…”
ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer‐infiltrated ceramic‐network materials (PICN) with different translucencies and thicknesses on multiple types of substrates.Materials and MethodsCeramic samples were prepared of VITA ENAMIC blocks in two different translucencies (2M2‐T, 2M2‐HT) in a thickness range of 0.5–2.5 mm (±0.05 mm). Layered specimens were obtained using composite substrates in nine shades and transparent try‐in paste. Spectral reflectance of specimens was measured using a Konica Minolta CM‐3720d spectrophotometer and D65 standard illumination. CIEDE2000 color difference (ΔE00) between two samples was evaluated using 50%:50% perceptibility and acceptability thresholds. Specular component of the reflection was examined with Specular Component Excluded (SCE) and Included (SCI) settings. Statistical evaluation was performed by linear regression analysis, Kruskal–Wallis test, and multiplicative effect analysis.ResultsAn increase in thickness of 0.5 mm reduces ΔE00 of HT samples to 73.5%, of T samples to 60.5% (p < 0.0001). Five substrates with HT specimens, and three substrates with T specimens had significantly different results from average (p < 0.05). There is a significant difference between SCE and SCI data depending on the wavelength (p < 0.0001).ConclusionsMasking ability of PICN materials is influenced by the thickness and translucency of the ceramic, and by the substrate. Reflection of the examined PICN material is characterized by both diffuse and specular reflection.Clinical SignificanceAlthough PICN materials have been available on the market for 10 years now, there is a lack of information regarding their masking ability. Acquiring in‐depth data and thereby practical experience of the factors affecting the esthetics of PICN materials is essential for creating perfectly lifelike restorations.
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