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Masking Ability of Bi‐ and Tri‐ Laminate All‐Ceramic Veneers on Tooth‐Colored Ceramic Discs
Author(s) -
Farhan Daniel,
Sukumar Smitha,
SteinLausnitz Axel,
Aarabi Ghazal,
Alawneh Ahmad,
Reissmann Daniel R.
Publication year - 2014
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12099
Subject(s) - materials science , ceramic , enamel paint , veneer , composite material , masking (illustration) , dentistry , dental porcelain , color difference , dentin , coping (psychology) , opacity , optics , computer science , medicine , art , psychology , visual arts , physics , filter (signal processing) , psychiatry , computer vision
Statement A predictable esthetic outcome is imperative when placing ceramic veneers. Discolored teeth pose a major challenge as sufficient material thickness is required to achieve a good esthetic result. There is limited evidence in the literature that compares the masking ability of multi‐laminate veneers. Purpose The aim of this in‐vitro study was to compare the masking ability of bi‐laminate ( BL ) and tri‐laminate ( TL ) all‐ceramic veneers cemented on tooth‐colored ceramic discs. Materials and Methods A total of 40 veneers (shade A 1, 10‐mm diameter, 0.8‐mm thick) were manufactured—20 BL veneers (0.4‐mm pressable ceramic coping veneered with 0.4‐mm thick enamel layer) and 20 TL veneers (0.4‐mm coping veneered with 0.2‐mm thick opaque interlayer and 0.2‐mm thick enamel layer). A bonding apparatus was utilized to adhesively cement all veneers on the ceramic discs (shade A 1), simulating teeth of light and dark color. The resulting groups ( N = 10 each) were the reference groups (shade A 1 ceramic base) BL ‐1 and TL ‐1 veneers, and the test groups (shade A 4 ceramic base) BL ‐4 and TL ‐4 veneers. The color of the cemented veneers was measured using a spectrophotometer. The data were converted to CIE L *a*b* coordinates, and Δ E * were calculated to allow for statistical analysis. Results The color differences between the samples with the A 1 and A 4 ceramic bases were significantly lower when covered with TL veneers (mean Δ E *: 3.2 units) than with BL veneers (mean Δ E *: 4.0 units: p < 0.001), indicating a better masking ability of the TL veneers. Conclusion The 0.8‐mm thick TL veneer was able to mask darker tooth‐colored ceramic disc within clinically acceptable limits. Clinical Significance Increased understanding of the masking ability of ceramics and of color science is necessary in these esthetically aware times. Providing tri‐laminate veneers for darker colored teeth seems to result in more predictable esthetical results than when using bi‐laminate veneers. Patients with discolored/darker teeth may benefit from a more predictable esthetic result when teeth restored with tri‐laminate rather than bi‐laminate veneers.