Awad Daniel, Stawarczyk Bogna, Liebermann Anja, Ilie Nicoleta
Dentist, Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Dental School, Ludwig-Maximilians University, Munich, Germany.
Senior Materials Scientist, Department of Prosthodontics, Dental School, Ludwig-Maximilians University, Munich, Germany.
J Prosthet Dent. 2015 Jun;113(6):534-40. doi: 10.1016/j.prosdent.2014.12.003. Epub 2015 Mar 4.
Little information is available about the translucency of monolithic CAD/CAM materials.
The purpose of this study was to evaluate the translucency of restorative CAD/CAM materials and direct composite resins with respect to thickness and surface roughness.
In total, 240 disk-shaped specimens (12×14×1 mm and 12×14×2 mm) of 3 different CAD/CAM glass ceramics (CELTRA Duo, IPS e.max CAD, IPS Empress CAD), a fine-structure feldspathic ceramic (VITA Mark II), a hybrid ceramic (VITA Enamic), a resin nanoceramic composite resin (LAVA Ultimate), an experimental (CAD/CAM nanohybrid composite resin), 2 interim materials (Telio CAD; VITA CAD-Temp), and 3 direct composite resins (Tetric EvoCeram; Filtek Supreme XTE; Tetric EvoCeram Bulk Fill) were fabricated (n=10). After 3 different surface pretreatments (polished, rough SiC P1200, or SiC P500), absolute translucency and surface roughness were measured using spectrophotometry and tactile profilometry. The influence of material type, thickness, and roughness on absolute translucency was analyzed using a multivariate analysis, 1-way ANOVA, and the Tukey HSD post hoc test (P<.05). Pearson correlations and statistical hypothesis tests were used to assess the results (P<.05).
The effect of all tested parameters was significant among the materials (P<.05). The greatest influence on the measured translucency was thickness (partial eta squared ηP²=.988), closely followed by material (.982), and the pretreatment method (.835). The surface roughness was strongly influenced by the pretreatment method (.975) and type of material (.941).
Thickness and surface roughness are major factors affecting the absolute translucency of adhesively luted restorations.
关于整体式计算机辅助设计/计算机辅助制造（CAD/CAM）材料的半透明性，目前可用信息较少。
本研究的目的是评估修复性CAD/CAM材料和直接复合树脂在厚度和表面粗糙度方面的半透明性。
总共制备了240个盘状试样（12×14×1毫米和12×14×2毫米），包括3种不同的CAD/CAM玻璃陶瓷（CELTRA Duo、IPS e.max CAD、IPS Empress CAD）、一种细结构长石质陶瓷（VITA Mark II）、一种混合陶瓷（VITA Enamic）、一种树脂纳米陶瓷复合树脂（LAVA Ultimate）、一种实验性（CAD/CAM纳米混合复合树脂）、2种临时材料（Telio CAD；VITA CAD-Temp）以及3种直接复合树脂（Tetric EvoCeram；Filtek Supreme XTE；Tetric EvoCeram Bulk Fill）（n = 10）。经过3种不同的表面预处理（抛光、粗糙的碳化硅P1200或碳化硅P500）后，使用分光光度法和触觉轮廓仪测量绝对半透明性和表面粗糙度。使用多变量分析、单因素方差分析和Tukey HSD事后检验（P <.05）分析材料类型、厚度和粗糙度对绝对半透明性的影响。使用Pearson相关性和统计假设检验来评估结果（P <.05）。
所有测试参数在材料之间的影响均具有显著性（P <.05）。对测量的半透明性影响最大的是厚度（偏 eta 平方ηP² =.988），其次是材料（.982）和预处理方法（.835）。表面粗糙度受预处理方法（.975）和材料类型（.941）的强烈影响。
厚度和表面粗糙度是影响粘结修复体绝对半透明性的主要因素。
