A Comparative Study of Relative Translucency of Six All-Ceramic Restorations

摘要

Purpose: Compared relative translucency of IPS e.max CAD, Vita Suprinity, Lava Zirconia, Cercon Zirconia, Zenostar and upcera Zirconia, to provide a reference for the clinical aesthetic choice. Method: Relative translucency were calculated from the luminous reflectance (Y) of the specimens with a black backing (Yb) and a white backing (Yw) to give Yb/Yw with Minolta CR-321.One-way analysis of variance and Tukey's multiple comparison test were used to analyze the data (P < 0.05). Results: Relative translucency of control group was 0.577-0.843,while experimental group was from 0.798 (IPS e.max CAD) to 0.947(upcera Zirconia),there were significantly different between the groups. The relative translucency of the six systems were as follows: IPS e.max CAD > Vita Suprinity > Lava Zirconia > Cercon Zirconia > Zenostar > upcera Zirconia. Conclusion: There were significantly different between the six groups, for patients with anterior tooth areas restoration and high aesthetic requirements, IPS e.max CAD and Vita Suprinity are recommended; For patients with poor transmittance of adjacent teeth, and the abutments are dark which need to be covered can choose Lava Zirconia and Cercon Zirconia; For low transparency like posterior areas and severe tetracycline teeth, upcera Zirconia and Zenostar ceramic blocks may be considered.