Impact of Bleaching before or after Veneer Preparation on Color Masking Ability of Laminate Veneers: An In Vitro Study
| Autor: | Abdulsalam Rasheed Al-Zahawi, Bestoon Mohammed Faraj, Gollshang Ahmad Mhammed Dalloo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Masking (art)
Lightness Materials science Article Subject medicine.medical_treatment MathematicsofComputing_GENERAL Color General Biochemistry Genetics and Molecular Biology Tooth discoloration 03 medical and health sciences 0302 clinical medicine Tooth Bleaching medicine Humans In vitro study 030212 general & internal medicine Composite material Analysis of Variance General Immunology and Microbiology 030206 dentistry General Medicine Dental Veneers TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES Spectrophotometry Medicine Veneer Color coordinates Dental veneers Research Article |
| Zdroj: | BioMed Research International, Vol 2021 (2021) BioMed Research International |
| ISSN: | 2314-6141 2314-6133 |
| DOI: | 10.1155/2021/6611173 |
| Popis: | 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: S 1 = 0.5 mm and S 2 = 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 Δ E 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 Δ E value compared to the nonbleached group ( p < 0.05 ). BAP showed the highest Δ E value. No significant difference was found between BBP and BAP. S2 revealed a significant Δ E 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 ( Δ L ∗ ) ( p < 0.001 ), while no significant differences were found in green/red value ( Δ a ∗ ) and yellow/blue value ( Δ b ∗ ) ( 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|