Role of enamel and dentin on color changes after internal bleaching associated or not with external bleaching
| Autor: | Ana Claudia Conceição Correia, André Luis Faria-e-Silva, Rafaella Mariana Fontes de Bragança, Tauan Rosa Santana, Isadora de Melo Oliveira |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
genetic structures
Dentistry Color In Vitro Techniques Esthetics dental 030207 dermatology & venereal diseases 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine stomatognathic system Dentin medicine Tooth Bleaching Animals Dental enamel Hydrogen peroxide Tooth Bleaching Agents General Dentistry Enamel paint Color difference business.industry RK1-715 030206 dentistry Hydrogen Peroxide Staining stomatognathic diseases medicine.anatomical_structure chemistry Color changes visual_art visual_art.visual_art_medium Original Article Cattle Tooth bleaching sense organs Sodium perborate business |
| Zdroj: | Journal of Applied Oral Science, Volume: 29, Article number: e20200511, Published: 16 DEC 2020 Journal of Applied Oral Science v.29 2021 Journal of applied oral science Universidade de São Paulo (USP) instacron:USP Journal of Applied Oral Science Journal of Applied Oral Science, Vol 29 (2020) |
| Popis: | Objective To evaluate the effect of the association between external and internal tooth bleaching on color changes in dentin and enamel, individually or recombined, previously stained with triple antibiotic paste (TAP). Methodology Forty enamel-dentin specimens from bovine incisors were separated into ten blocks according to similarity in their whiteness index (WID). Three specimens within each block were stained by dentin exposure to TAP, and the remaining specimen was used as control to estimate color changes. Specimens were sectioned to separate tissues, and dentin and enamel colors were measured individually and after being recombined. Alterations in color (CIEDE2000 - ΔE00) and translucency parameter (TP) resulting from staining were estimated by color difference between stained and control specimens. The contribution of each tissue to the color change (CTCC) was also calculated. Non-sectioned stained specimens were bleached by applying sodium perborate on dentin, associated or not with 35% hydrogen peroxide on enamel. Color changes caused by bleaching procedures were estimated and data were analyzed using the paired t-test or Two-way repeated measures ANOVA. Results TAP caused more pronounced changes in dentin, but enamel color was also affected. Both protocols presented a similar ΔE00, and dentin showed the greater color change. After exposure to TAP, we observed a reduction in WID; WID values were the same for bleached and control specimens regardless of protocol. We found no significant effect of substrate and bleaching technique on TP. Enamel played a more critical role in color changes caused by either staining or bleaching procedures. Conclusion Enamel color played a greater role on tooth color changes than dentin. External and internal bleaching association did not improve bleaching effect on specimens stained with TAP. |
| Databáze: | OpenAIRE |
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