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. 2021 Apr 27:2021:6611173.
doi: 10.1155/2021/6611173. eCollection 2021.

Impact of Bleaching before or after Veneer Preparation on Color Masking Ability of Laminate Veneers: An In Vitro Study

Gollshang Ahmad Mhammed Dalloo  1 , Bestoon Mohammed Faraj  1 , Abdulsalam Rasheed Al-Zahawi  1
Affiliations

Impact of Bleaching before or after Veneer Preparation on Color Masking Ability of Laminate Veneers: An In Vitro Study

Gollshang Ahmad Mhammed Dalloo et al. Biomed Res Int. .

Abstract

Purpose: This study evaluates the effect of bleaching before or after veneer preparation and the depth of preparation on color masking ability of laminate veneers. Methods. Sixty extracted premolars were artificially stained to vita shade A4, verified by digital spectrophotometer (Vita Easy Shade V), and then divided into three groups: NB = nonbleached, BBP = bleaching before preparation, and BAP = bleaching after preparation. Based on the preparation depths, each group was further divided into two subgroups: S1 = 0.5 mm and S2 = 1.0 mm. BBP and BAP were subjected to one session of in-office bleaching using 35% hydrogen peroxide. IPS e-max CAD veneers of 0.5 and 1.0 mm thickness (corresponding to the preparation depths) of the same shade and translucency (HT A1) were cemented immediately to the bleached surfaces. Immediately after cementation, the color change ΔE between the baseline (after staining) and the resulted shades was measured using the Vita Easy Shade V digital spectrophotometer and CIELab color system.

Results: Bleached groups exhibited a significant ΔE value compared to the nonbleached group (p < 0.05). BAP showed the highest ΔE value. No significant difference was found between BBP and BAP. S2 revealed a significant ΔE value than S1 (p < 0.05). No significant difference was found between S1of BAP and S2 of NB, BBP, and BAP (p > 0.05). Regarding the color coordinates, the difference between the tested groups was highly significant in lightness (ΔL∗) (p < 0.001), while no significant differences were found in green/red value (Δa∗) and yellow/blue value (Δb∗) (p > 0.05).

Conclusions: In cases of severe tooth discoloration, one session of in-office bleaching before or after veneer preparation and the preparation depth do not influence the color masking ability of laminate veneers.

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Conflict of interest statement

The authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
Summary of the study design.
Figure 2
Figure 2
Tooth color measurement using Vita Easy Shade V Spectrophotometer.
Figure 3
Figure 3
Preparation depths: (a) 0.5 mm and (b) 1.0 mm.
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References

    1. Sulieman M. An overview of bleaching techniques: 3. In-surgery or power bleaching. Dental Update. 2005;32(2):101–108. doi: 10.12968/denu.2005.32.2.101. - DOI - PubMed
    1. Dubal R., Porter R. W. An update on discoloured teeth and bleaching part 1: the aetiology and diagnosis of discoloured teeth. Dental Update. 2018;45(7):601–608. doi: 10.12968/denu.2018.45.7.601. - DOI
    1. Kose C., Reis A., Baratieri L. N., Loguercio A. D. Clinical effects of at-home bleaching along with desensitizing agent application. American Journal of Dentistry. 2011;24(6):379–382. - PubMed
    1. Borges A. B., Zanatta R. F., Barros A. C. S. M., Silva L. C., Pucci C. R., Torres C. R. G. Effect of hydrogen peroxide concentration on enamel color and microhardness. Operative Dentistry. 2015;40(1):96–101. doi: 10.2341/13-371-L. - DOI - PubMed
    1. Amengual-Lorenzo J., Montiel-Company J. M., Labaig-Rueda C., Agustín-Panadero R., Solá-Ruíz M. F., Peydro-Herrero M. Combined vital tooth whitening: effect of number of in-office sessions on the duration of home whitening. A randomized clinical trial. Applied Sciences. 2020;10(13):p. 4476. doi: 10.3390/app10134476. - DOI

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