Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Turkey.
J Esthet Restor Dent. 2021 Sep;33(6):925-934. doi: 10.1111/jerd.12667. Epub 2020 Oct 1.
It was aimed to evaluate the effect of various surface-conditioning methods on the translucency and color properties of resin-matrix ceramics (RMCs) with different types and thicknesses.
Rectangle-shaped RMCs were prepared from Voco Grandio, Brilliant Crios, Lava Ultimate, GC Cerasmart, and Vita Enamic blocks at 0.5 and 1.0 mm thicknesses. Specimens were divided into four groups: control, airborne-particle abrasion (APA), 2 and 3 W Er, Cr:YSGG laser irradiations (L , L ) (n = 15). The color values of specimens were recorded before and after surface-conditioning using a spectrophotometer. The translucency parameter (RTP ) and color difference (ΔE ) values were calculated. Data were statistically analyzed using three-way ANOVA and Tukey post hoc tests.
The translucencies of RMCs decreased after all surface-conditioning procedures. L caused more decline in translucency of materials than APA. All ΔE values were under the acceptability threshold except for APA-applied Voco Grandio at 0.5 mm. Differences in ΔE values between APA and L groups were significant (P˂0.05); while differences between L and L groups were insignificant (P > .05). In all experimental groups, ΔE values decreased with increasing thickness of RMCs.
L and APA significantly affected the translucency and color properties of RMCs. APA was found more favorable than L.
Clinicians should carefully use surface conditioning methods, considering their impact on the optical characteristics of RMCs, especially when the restoration is thin.
评估不同类型和厚度的树脂基质陶瓷（RMC）经各种表面处理方法后对其透光率和颜色性能的影响。
将 Voco Grandio、Brilliant Crios、Lava Ultimate、GC Cerasmart 和 Vita Enamic 块制备成 0.5 和 1.0mm 厚度的矩形 RMC。将试件分为四组：对照组、喷丸处理（APA）组、2W 和 3W Er,Cr:YSGG 激光处理组（L 、L ）（n=15）。使用分光光度计在表面处理前后记录试件的颜色值。计算透光率参数（RTP）和色差值（ΔE）。采用三因素方差分析和 Tukey 事后检验对数据进行统计学分析。
所有表面处理程序后，RMC 的透光率均降低。L 处理比 APA 处理更降低材料的透光率。除 APA 处理的 Voco Grandio 0.5mm 外，所有ΔE 值均在可接受范围内。APA 组和 L 组之间的ΔE 值差异具有统计学意义（P＜0.05）；而 L 组和 L 组之间的差异无统计学意义（P＞0.05）。在所有实验组中，随着 RMC 厚度的增加，ΔE 值降低。
L 和 APA 显著影响 RMC 的透光率和颜色性能。APA 比 L 更有利。
临床医生应谨慎使用表面处理方法，考虑其对 RMC 光学特性的影响，尤其是在修复体较薄时。
