Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of resin cement shades & thickness of zirconia reinforced lithium disilicate ceramics (Vita Suprinity) on the optical properties using dark background compared to lithium disilicate glass ceramics
Abstract Introduction: This study investigated the effect of resin cement shades & thickness of zirconia reinforced lithium disilicate ceramics (Vita Suprinity) on the optical properties using dark background compared to lithium disilicate glass ceramicsMethod: The ceramic blocks used were Vita Suprinity (VS) shade A2 and translucent (T), and IPS e.max CAD (e.max) block A2 shade with Low translucency (LT). A slow-speed diamond saw was used to create fifty six (n=56) ceramics rectangular plates, twenty eight zirconia reinforced glass ceramic plates (group 1) and twenty eight lithium disilicate glass ceramic plates (group 2), with dimensions(14 x 12 mm). The plates were divided into two subgroups of two different thickness 1.0, 1.5 mm/group. Composite samples representing the dark background was constructed using a Teflon disc with rectangular central opening of 14 x 12 mm, thickness of 2 mm and a cement disks were constructed by copper mold with 2 different shades (yellow and transparent). After preparation of ceramic samples, dark composite background (C3) and cement shades samples, the color difference was measured by spectrophotometer after 24 hours. Results were statistically significant at p≤0.05.Results: It was found that highest ΔE value was obtained with Suprinity 1.5 mm with yellow cement, while lowest with was obtained e.max 1 mm with transparent cement. The ΔE of Suprinity 1 and 1.5 mm with yellow cement were 3.88 and 4.28 respectively. Comparing ceramic types Suprinity showed statistically significant higher mean ΔE than e.max. By comparing thicknesses, the mean ΔE with 1 mm thickness showed statistically significant lower mean value than 1.5 mm thickness. By Comparing cement shades, transparent cement showed statistically significant lower mean ΔE than yellow cement.
Effect of resin cement shades & thickness of zirconia reinforced lithium disilicate ceramics (Vita Suprinity) on the optical properties using dark background compared to lithium disilicate glass ceramics
Abstract Introduction: This study investigated the effect of resin cement shades & thickness of zirconia reinforced lithium disilicate ceramics (Vita Suprinity) on the optical properties using dark background compared to lithium disilicate glass ceramicsMethod: The ceramic blocks used were Vita Suprinity (VS) shade A2 and translucent (T), and IPS e.max CAD (e.max) block A2 shade with Low translucency (LT). A slow-speed diamond saw was used to create fifty six (n=56) ceramics rectangular plates, twenty eight zirconia reinforced glass ceramic plates (group 1) and twenty eight lithium disilicate glass ceramic plates (group 2), with dimensions(14 x 12 mm). The plates were divided into two subgroups of two different thickness 1.0, 1.5 mm/group. Composite samples representing the dark background was constructed using a Teflon disc with rectangular central opening of 14 x 12 mm, thickness of 2 mm and a cement disks were constructed by copper mold with 2 different shades (yellow and transparent). After preparation of ceramic samples, dark composite background (C3) and cement shades samples, the color difference was measured by spectrophotometer after 24 hours. Results were statistically significant at p≤0.05.Results: It was found that highest ΔE value was obtained with Suprinity 1.5 mm with yellow cement, while lowest with was obtained e.max 1 mm with transparent cement. The ΔE of Suprinity 1 and 1.5 mm with yellow cement were 3.88 and 4.28 respectively. Comparing ceramic types Suprinity showed statistically significant higher mean ΔE than e.max. By comparing thicknesses, the mean ΔE with 1 mm thickness showed statistically significant lower mean value than 1.5 mm thickness. By Comparing cement shades, transparent cement showed statistically significant lower mean ΔE than yellow cement.
Effect of resin cement shades & thickness of zirconia reinforced lithium disilicate ceramics (Vita Suprinity) on the optical properties using dark background compared to lithium disilicate glass ceramics
Habib, Diana Mostafa (Autor:in)
10.01.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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