West China Journal of Stomatology ›› 2021, Vol. 39 ›› Issue (3): 341-346.doi: 10.7518/hxkq.2021.03.015

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Effect of ceramic materials on the optical properties of porcelain veneers for tetracycline-stained teeth

Chen Jin1,2(), Xia Qi1, Zhang Lingling1, Qian Huifen3, Li Xingxing1,2()   

  1. 1.College of Stomatology, Kunming Medical University, Kunming 650500, China
    2.Dept. of Prosthodontics, Affiliated Stomatological Hospital of Kunming Medical University, Kunming 650100, China
    3.Dept. of Prosthodontics, The Second People's Hospital of Yunnan Province, Kunming 650021, China
  • Received:2020-03-16 Revised:2021-01-29 Online:2021-06-01 Published:2021-05-26
  • Contact: Li Xingxing E-mail:chenjin150525@163.com;xingxing2005099@163.com
  • Supported by:
    National Innovation Training Program for College Students(201710678011);The Medical Reserve Talent Projects in Yunnan Province(H-201638)

Abstract: Objective

To analyze the chromatic properties and translucency of porcelain veneers made from different ceramic materials against the background of tetracycline-stained teeth.


Porcelain specimens (A1, A3, B2, B4) measuring 0.50 mm in thickness were prepared by heat-press casting and layering. The L*, a*, and b* values of the specimens against simulated tetracycline tooth and black-and-white backgrounds were measured by a spectrophotometer, and color differences ΔE001 between specimens on simulated tetracycline backgrounds and the backgrounds themselves and ΔE002 between specimens on simulated tetracycline backgrounds and the white background were calculated. The translucent parameter (TP) was also evaluated.


The ΔE001 of feldspathic specimens (IPS d.SIGN) with the opaque layer was significantly greater than that of glass ceramic specimens (IPS e.max Press LT), and the ΔE001 of group B4 was consistently greater than those of the other color groups (P<0.05). The ΔE002 values of all feldspathic specimens with the opaque layer were less than 1.25, and the ΔE002 values of the glass ceramic specimens were greater than 2.23. However, no significant difference was observed among the different color groups (P>0.05). The TP values of feldspathic specimens with the opaque layer were significantly lower than those of glass ceramic specimens(P<0.05), but no significant difference was observed among different color groups (P>0.05).


When changing the color of tetracycline-stained teeth, 0.50 mm-thick IPS d.SIGN feldspathic veneers with an opaque layer provide better chromatic properties than IPS e.max Press LT glass ceramic veneers. However, the translucency of feldspathic veneers is generally poorer than that of glass ceramic veneers.

Key words: tetracycline-stained teeth, porcelain veneer, glass-ceramic, feldspathic ceramic, color difference

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