Faculty of Dentistry, Prosthodontics Department, Karadeniz Technical University, Trabzon, Turkey.
Faculty of Dentistry, Prosthodontics Department, Bolu Abant Izzet Baysal University, Bolu, Turkey.
J Esthet Restor Dent. 2019 Mar;31(2):147-152. doi: 10.1111/jerd.12460. Epub 2019 Feb 20.
To evaluate the relative translucency parameter (RTP) values of computer-aided design (CAD)-computer-aided manufacturing (CAM) materials after UV aging.
70 specimens (n = 10) of Bruxzir Anterior (BA); E.max Cad (EC); Lava Ultimate (LU); Cerasmart (CE); Vita Enamic (VE); Vita Suprinity (VS); Vita Mark II (VM) were prepared (1 mm ± 0.01 mm). Color measurements were performed using a spectrofotometer (VITA Easyshade). RTP values of the specimens before (RTP ) and after UV aging (RTP ) were evaluated. Statistical analyses were done with repeated measurements of two-way-ANOVA with Bonferroni test (P < 0.05).
Evaluating RTP and RTP values; significant differences were found (P < 0.05). There were no significant difference between the RTP values of CE and VS (P = 0.779); EC and VM (P = 0.952); VM and LU (P = 0.995); EP and LU (P = 0.653). Evaluating RTP values; VE and BA were found significantly different from the others (P < 0.05). For all evaluated groups TP values decreased after UV aging (P < 0.05). The most RTP reduction was observed for LU; while VM and EC were less affected.
Glass ceramic VE showed the highest RTP and zirconia-based BA was the most opaque restorative CAD-CAM material. UV aging caused the CAD-CAM materials get more opaque.
In cases where translucency is needed chosing VE would give better esthetic results; while zirconia-based BA should be used if more opaque restoration is needed. Clinicians should be aware of that restorations get more opaque after usage.
评估计算机辅助设计（CAD）-计算机辅助制造（CAM）材料在紫外线老化后的相对透光率参数（RTP）值。
制备 70 个 Bruxzir Anterior（BA）；E.max Cad（EC）；Lava Ultimate（LU）；Cerasmart（CE）；Vita Enamic（VE）；Vita Suprinity（VS）；Vita Mark II（VM）试件（n=10）（1mm±0.01mm）。使用分光光度计（VITA Easyshade）进行颜色测量。评估试件在紫外线老化前后的 RTP 值（RTP）。采用重复测量的双向方差分析和 Bonferroni 检验进行统计分析（P<0.05）。
评估 RTP 和 RTP 值；发现有显著差异（P<0.05）。CE 和 VS（P=0.779）；EC 和 VM（P=0.952）；VM 和 LU（P=0.995）；EP 和 LU（P=0.653）之间的 RTP 值无显著差异。评估 RTP 值；VE 和 BA 与其他材料有显著差异（P<0.05）。所有评估组的 TP 值在紫外线老化后均降低（P<0.05）。LU 的 RTP 减少最多；而 VM 和 EC 的影响较小。
玻璃陶瓷 VE 显示出最高的 RTP，而基于氧化锆的 BA 是最不透明的修复性 CAD-CAM 材料。紫外线老化使 CAD-CAM 材料变得更不透明。
在需要透光率的情况下，选择 VE 会产生更好的美学效果；而如果需要更不透明的修复，则应使用基于氧化锆的 BA。临床医生应注意到修复体在使用后会变得更不透明。
