Quintessence Int. 2022 Aug 17;53(8):678-688. doi: 10.3290/j.qi.b3045089.
The purpose of this in vitro study was to evaluate the influence of the ceramic thickness, cement shade, and airborne-particle abrasion of the titanium on the final color of titanium base cemented lithium disilicate glass-ceramic restorations.
In total, 144 lithium disilicate glass-ceramic disks of three thicknesses (0.5, 1.0, and 1.5 mm) were cemented to airborne-particle-abraded and non-airborne-particle-abraded titanium disks with six adhesive resin cements. The color measurements were performed with a clinical spectrophotometer. The mean and standard deviation of evaluated ΔE values were calculated. A three-way analysis of variance (ANOVA) was used for analyzing the data. Statistical analyses were computed with a significance level of α = .05 using a statistical software program (Minitab 17, Minitab).
The 0.5- and 1-mm-thick ceramic specimens cemented with Panavia V5 Opaque showed the lowest ΔE values when cemented on both non-airborne-particle-abraded (5.62 ± 1.66, 3.15 ± 1.28) and airborne-particle-abraded (5.55 ± 0.86, 3.16 ± 0.49) surfaces, while the highest values were seen in the groups cemented with RelyX U200 A2 (29.22 ± 0.83, 17.23 ± 0.45) and Panavia V5 A2 (29.94 ± 1.17, 16.71 ± 0.44) on airborne-particle-abraded surfaces. For the 1.5-mm-thick ceramics, the lowest ΔE values were seen when Multilink MO 0 cement was used on non-airborne-particle-abraded surfaces (1.56 ± 0.29) and when Panavia V5 Opaque was used on airborne-particle-abraded surfaces (1.56 ± 0.66). The highest values were seen when RelyX U200 A2 (9.77 ± 1.13), PA2 (9.24 ± 0.25), and Multilink HO 0 (9.19 ± 1.33) were used on airborne-particle-abraded surfaces, and when Multilink HO 0 (9.61 ± 1.70) was used on non-airborne-particle-abraded surfaces. The 1-mm-thick ceramics cemented with Multilink HO 0 showed higher ΔE values (12.05 ± 1.99) for airborne-particle-abraded and non-airborne-particle-abraded (12.58 ± 1.06) than thinner (0.5 mm) or thicker (1.5 mm) ceramics.
Thinnest ceramic superstructures resulted in the highest ΔE values. Cements that mask the underlying color reflect their own shade under thin superstructures. Airborne-particle abrasion of titanium surfaces increases the grayish reflectance if cement shade does not have the color masking ability.
本体外研究的目的是评估陶瓷厚度、粘结剂颜色和钛的喷丸处理对钛基底锂硅玻璃陶瓷修复体最终颜色的影响。
共制作了 144 个厚度为 0.5、1.0 和 1.5mm 的锂硅玻璃陶瓷圆盘，分别用 6 种粘结树脂粘结剂粘结到经喷丸处理和未经喷丸处理的钛盘上。采用临床分光光度计进行颜色测量。计算评估的 ΔE 值的平均值和标准差。采用三因素方差分析（ANOVA）分析数据。使用统计软件程序（Minitab 17，Minitab），在 α=0.05 的显著性水平下进行统计分析。
0.5mm 和 1mm 厚的陶瓷试件用 Panavia V5 Opaque 粘结在未经喷丸处理（5.62±1.66，3.15±1.28）和经喷丸处理（5.55±0.86，3.16±0.49）的表面时，显示出最低的 ΔE 值，而用 RelyX U200 A2（29.22±0.83，17.23±0.45）和 Panavia V5 A2（29.94±1.17，16.71±0.44）粘结剂粘结在经喷丸处理的表面时，显示出最高的 ΔE 值。对于 1.5mm 厚的陶瓷，当 Multilink MO 0 粘结剂用于未经喷丸处理的表面（1.56±0.29）和 Panavia V5 Opaque 粘结剂用于经喷丸处理的表面（1.56±0.66）时，显示出最低的 ΔE 值。当 RelyX U200 A2（9.77±1.13）、PA2（9.24±0.25）和 Multilink HO 0（9.19±1.33）粘结剂用于经喷丸处理的表面，以及当 Multilink HO 0 粘结剂用于未经喷丸处理的表面（9.61±1.70）时，显示出最高的 ΔE 值。1mm 厚的陶瓷用 Multilink HO 0 粘结时，对经喷丸处理（12.05±1.99）和未经喷丸处理（12.58±1.06）的表面的 ΔE 值均高于较薄（0.5mm）或较厚（1.5mm）的陶瓷。
最薄的陶瓷修复体导致最高的 ΔE 值。掩盖底层颜色的粘结剂在较薄的修复体下会反射出自身的颜色。如果粘结剂没有颜色遮蔽能力，那么钛表面的喷丸处理会增加灰色反射率。
