Experimental study on the transparency of different all-ceramic materials and their color changes under different backgrounds
10.7518/hxkq.2014.04.021
- VernacularTitle:全瓷材料的透明度及不同背景下色度学变化的实验研究
- Author:
Yeqing ZHOU
1
;
Xinhua GU
Author Information
1. 浙江大学医学院附属第一医院口腔医疗中心
- Keywords:
all-ceramic;
translucency parameter;
mimic-tetracycline pigmentation teeth;
color;
color difference
- From:
West China Journal of Stomatology
2014;(4):409-412
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the aesthetic outcomes of all-ceramic restorations by using four different porcelain materials on mimic-tetracycline pigmentation backgrounds. Methods The translucency parameters (TP) of four different all-ceramic restorations (IPS e.max, Cercon, Lava, and Girrbach) were measured under white and black back grounds by using Datacolor 600, and the TP of each group (n=8) was calculated. Five different mimic-tetracycline pigmentation teeth were printed with different colors by using a colorized printer as the prepared teeth backgrounds, under which the color para-meters of each group were measured. The color differences with a standard 2M2 sample were calculated. Results The TP values of the all-ceramic restorations were 15.67±0.58 for IPS e.max, 9.73±0.43 for Girrbach, 9.55±0.25 for Lava, and 7.56± 0.43 for Cercon. The TP value of the IPS e.max group was significantly higher than those of the other three groups (P<0.001). TheΔE of the IPS e.max group was 1.33 national bureau of standards (NBS) on the yellow background, and theΔE of the Lava and Girrbach groups were 0.75 NBS to 1.47 NBS on the mimic-tetracycline pigmentation backgrounds of gray, dark gray, dark red, and light red. Conclusion The IPS e.max group has favorable TP. IPS e.max shows better aesthetic effects than the others when restoring mimic-tetracycline pigmentation teeth (on yellow background). Lava and Girrbach show better aesthetic effects on mimic-tetracycline pigmentation teeth (on gray, dark gray, dark red, and light red backgrounds).
