Peña Ranulfo Castillo, Ramos Alejandro Cardenas, Dos Santos Nunes Reis José Maurício, Dovigo Lívia Nordi, Salomon Jean-Pierre Guy Olivier, Del Mar Pérez María, Fonseca Renata Garcia
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP-Univ. Estadual Paulista, Araraquara, São Paulo, Brazil.
Department of Social Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, Brazil.
J Esthet Restor Dent. 2025 Feb;37(2):440-455. doi: 10.1111/jerd.13288. Epub 2024 Jul 30.
To evaluate the effect of polishing and bleaching on the recovery of lightness, color, whiteness, and relative translucency parameter (RTP) in CAD/CAM materials and changes in these properties when another staining in coffee was conducted after the treatments.
Disks of Lava Ultimate (LU), Vita Enamic (VE), IPS Empress CAD (EMP), IPS e.max CAD (EMAX), and Vita Suprinity (VS) were (1) not treated (control), (2) polished with Proxyt or (3) Ceramisté, (4) bleached with Opalescence PF or (5) Whiteness HP Blue, and (6) air polished with Clinpro Prophy Powder. CIE Lab* color coordinates were registered at baseline (R), after staining with coffee for 30 min daily for 36.5 days and treatment (R), and after another staining (R). Differences (R-R and R-R) in lightness (ΔL), color (ΔE), RTP (ΔRTP), and whiteness (ΔWI) were evaluated by mixed repeated measures ANOVA and 95% confidence intervals (α = 0.05) and interpreted in function of their respective 50:50% PT and AT thresholds. Topography was evaluated by scanning electron microscopy (SEM).
In LU, Opalescence PF and Proxyt decreased , , and and showed lower , , and . In VE, all treatments decreased , , and , whereas , , and were lower in Opalescence PF than in the control group. In both moments, ΔE and ΔWI in EMP (also ΔL) and EMAX were higher in Opalescence PF than in the control group, from which the other treatments did not differ in R-R. In EMP, in Whiteness HP Blue (also ) and Proxyt were also higher in comparison to the control group and in VS, Ceramisté decreased , , and , whereas Opalescence PF increased . of Ceramisté and and of Proxyt were lower than those of the control group.
The most suitable treatment to recover the lightness, color, whiteness, and RTP without changing these properties after another coffee exposure is material-dependent.
Although the effectiveness of the treatment was material-dependent, Proxyt was the only treatment that promoted clinically acceptable changes for both LU and VE, while for purely ceramic materials, this condition was observed with Ceramisté and Clinpro Prophy Powder.
评估抛光和漂白对CAD/CAM材料明度、颜色、白度及相对半透明度参数（RTP）恢复的影响，以及处理后再进行咖啡染色时这些性能的变化。
制备Lava Ultimate（LU）、Vita Enamic（VE）、IPS Empress CAD（EMP）、IPS e.max CAD（EMAX）和Vita Suprinity（VS）的圆盘试件，分别进行如下处理：（1）不处理（对照）；（2）用Proxyt或（3）Ceramisté抛光；（4）用Opalescence PF或（5）Whiteness HP Blue漂白；（6）用Clinpro Prophy Powder进行空气抛光。在基线（R）、每日用咖啡染色30分钟，持续36.5天并处理后（R）以及再次染色后（R）记录CIE Lab*颜色坐标。通过混合重复测量方差分析和95%置信区间（α = 0.05）评估明度（ΔL）、颜色（ΔE）、RTP（ΔRTP）和白度（ΔWI）的差异（R - R和R - R），并根据各自50:50%的PT和AT阈值进行解释。通过扫描电子显微镜（SEM）评估表面形貌。
在LU中，Opalescence PF和Proxyt降低了 、 和 ，且显示出较低的 、 和 。在VE中，所有处理均降低了 、 和 ，而Opalescence PF处理后的 、 和 低于对照组。在两个时间点，Opalescence PF处理的EMP（以及ΔL）和EMAX的ΔE和ΔWI均高于对照组，其他处理在R - R方面无差异。在EMP中，Whiteness HP Blue处理后的 （以及 ）和Proxyt处理后的 也高于对照组；在VS中，Ceramisté降低了 、 和 ，而Opalescence PF提高了 。Ceramisté处理后的 以及Proxyt处理后的 和 低于对照组。
在再次接触咖啡后恢复明度、颜色、白度和RTP且不改变这些性能的最合适处理方法因材料而异。
尽管处理效果因材料而异，但Proxyt是唯一对LU和VE都能促进临床上可接受变化的处理方法，而对于纯陶瓷材料，Ceramisté和Clinpro Prophy Powder也观察到了这种情况。
