Int J Stomatol

Int J Stomatol ›› 2020, Vol. 47 ›› Issue (4): 413-417.doi: 10.7518/gjkq.2020066

• Original Articles • Previous Articles     Next Articles

Effect of porcelain layer thickness and substrate on the optical properties of porcelain veneers for tetracycline stained teeth

Qian Huifen1,2,Lin Yunhong3,Wu Meiying1,Dai Zichao1,Li Xingxing1()   

  1. 1. Yunnan Research Institute of Stomatology, Kunming 650500, China
    2. Dept. of Prosthodontics, Yunnan Second People’s Hospital, Kunming 650021, China
    3. Dept. of Prosthodontics, Affiliated Stomatological Hospital of Kunming Medical University, Kunming 650100, China
  • Received:2019-10-08 Revised:2020-03-20 Online:2020-07-01 Published:2020-07-10
  • Contact: Xingxing Li E-mail:xingxing2005099@163.com
  • Supported by:
    This study was supported by Internal Research Project of Medical Institutions in Yunnan Province(2016NS114);Medical Reserve Talents Fund of Yunnan Health and Family Planning Commission(H-201638)

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Abstract:

Objective This study aimed to analyze the color properties and translucency of porcelain veneers with different thicknesses and substrates when used to repair tetracycline stained teeth. Methods Porcelain specimens with different opaque and dentine thicknesses (dentine/opaque: 0.40 mm/0.10 mm, 0.30 mm/0.20 mm, 0.65 mm/0.10 mm, and 0.55 mm/0.20 mm) were fabricated by powder-slurry sintering. L*, a*, and b* parameters were measured under simulated tetracycline and black and white backgrounds by using a spectrophotometer. The ΔE001 and ΔE002 color differences among the specimens on simulated tetracycline backgrounds and normal white background, respectively, were calculated. The translucent parameter (TP values) was also examined. Results 1) The ΔE001 of two groups with a total thickness of 0.75 mm were statistically greater than 0.50 mm groups (P<0.01), except for the yellow background. 2) The ΔE002 of specimens of different thickness under different substrates were all less than 1.25 and there was no significant difference over different substrates (P>0.01). 3) The TP values of all specimens were less than 1, and there was no statistical dif-ference between different thickness groups (P>0.01). Conclusion For yellow, red, and gray tetracycline stained teeth, 0.50 mm-thick IPS d.SIGN porcelain veneers (0.10 mm opaque with 0.40 mm dentine) can obtain good color matching with the target color; however, the translucent property of the porcelain veneers is worse than that of natural teeth.

Key words: porcelain laminate veneer, thickness, tetracycline stained teeth, masking ability, color matching

CLC Number: 

  • R783.1

TrendMD: 

Fig 1

The ΔE001 of porcelain specimens with different thickness"

Tab 1

Analysis of variance of ΔE001 in different thick-ness groups"

测量项目 F值 P值
瓷层厚度 128.882 <0.001
背景颜色 256.099 <0.001
瓷层厚度×背景颜色 6.701 <0.001

Fig 2

The ΔE002 of porcelain specimens with different thickness"

Tab 2

Analysis of variance of ΔE002 in different thick-ness groups"

测量项目 F值 P值
瓷层厚度 1.575 0.202
背景颜色 2.897 0.027
瓷层厚度×背景颜色 0.920 0.531

Fig 3

The TP values of porcelain specimens with different thickness"

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