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Schneider LF, Mueller B, Nisie Tango R, Volpato CAM. Effect of coffee staining and simulated oral hygiene methods on the color and translucency of a nanoceramic resin. J ESTHET RESTOR DENT 2024; 36:1020-1028. [PMID: 38445806 DOI: 10.1111/jerd.13214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/20/2024] [Accepted: 02/25/2024] [Indexed: 03/07/2024]
Abstract
OBJECTIVE Evaluate the color and translucency of a nanoceramic resin subjected to hygiene practices and immersion in coffee over time. MATERIALS AND METHODS Specimens (n = 80, HT and LT, 0.5-mm thick) of a nanoceramic resin were obtained and were divided in groups according to the simulated oral hygiene: no intervention (NT), brushing with an electric brush and water (BN), brushing with an electric brush and toothpaste for 10 s (BT), and immersion in mouthwash for 30 s (MW). Oral hygiene practices were repeated after staining in coffee solution for 15, 48, 336, 1440, 8640, and 35,040 min. Spectral wavelengths were recorded with a spectrophotometer at each time. ∆E00, ∆L', ∆C', ∆H', and TP00 were calculated by CIEDE2000 and were evaluated by 2-way ANOVA, repeated measures ANOVA, and Tukey's HSD test (α = 0.05). RESULTS ANOVA showed significance among factors for ΔE00 (p < 0.05), with higher ΔE00 for NT-HT (11.7) and NT-LT (11.2). After T6 (2-year simulation), the lowest values were found for BT-HT (5.3) and BT-LT (4.9). All groups showed a reduction in lightness and translucency and increased chroma and hue. However, the smallest variations were found in the BT groups (p < 0.05). CONCLUSIONS Brushing with toothpaste effectively minimized the color change of NCRs caused by coffee staining. CLINICAL SIGNIFICANCE Oral hygiene practices, such as brushing with toothpaste, might be important to minimize staining of nanoceramic resin restorations, especially in patients who frequently consume coffee.
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Affiliation(s)
- Luiz Felipe Schneider
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Bruna Mueller
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Rubens Nisie Tango
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, State University of São Paulo, São José dos Campos, Brazil
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Topçu S, Tekçe N, Kopuz D, Özcelik EY, Kolaylı F, Tuncer S, Demirci M. Effect of surface roughness and biofilm formation on the color properties of resin-infiltrated ceramic and lithium disilicate glass-ceramic CAD-CAM materials. J Prosthet Dent 2024; 131:935.e1-935.e8. [PMID: 38431509 DOI: 10.1016/j.prosdent.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 03/05/2024]
Abstract
STATEMENT OF PROBLEM Computer-aided design and computer-aided manufacturing (CAD-CAM) materials have become popular for dental restorations; however, which materials should be preferred in terms of surface properties after biofilm formation is unclear. PURPOSE The purpose of this in vitro study was to investigate the effect of biofilm formation on the discoloration properties of resin-infiltrated ceramic and glass-ceramic CAD-CAM materials and human teeth and to examine the effect of the brushing procedure on color change. MATERIAL AND METHODS One hundred and six 2-mm-thick specimens were prepared from IPS e.max CAD and Cerasmart, and a total of 53 intact human teeth were used. Five specimens from each group were used to measure the amount of live biomass in the biofilm. The remaining 48 specimens in each group were divided into 4 subgroups: kept in distilled water without the formation of dental biofilm (DW), kept in tea without the formation of dental biofilm (T), kept in distilled water after the formation of dental biofilm (DWB), and kept in tea after the formation of dental biofilm (TB) (n=12). After finishing and polishing the materials, initial color measurements were made using a spectrophotometer, and surface roughness measurements were made using noncontact profilometer. After creating a biofilm layer in DWB and TB, all specimens were kept in their solutions at 37 °C for 24 hours, and the color measurements were repeated. After the biofilm layer had been removed by brushing, a third color measurement was made. The data were statistically analyzed with one-way analysis of variance (ANOVA) and two-way ANOVA (α=.05). RESULTS The lowest roughness value was observed in Cerasmart. Tooth-IPS e.max CAD gave similar results. The Cerasmart material had the most viable biomass, whereas the IPS e.max CAD material had the least. TB had the highest ΔE1 value for all materials and DW had the lowest (P<.05). The brushing procedure caused the materials to return to their initial colors or reduce the color change in most groups. CONCLUSIONS The presence of biofilm on CAD-CAM materials immersed in distilled water caused an unacceptable degree of discoloration (ΔE>1.8), and immersion in tea led to greater color change. The adhesion of biofilm to restorative dental materials plays an important role in the coloring of these dental materials.
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Affiliation(s)
- Sümeyra Topçu
- Research Assistant, Department of Restorative Dentistry, Kocaeli University, Kocaeli, Turkey
| | - Neslihan Tekçe
- Professor, Department of Restorative Dentistry, Kocaeli University, Kocaeli, Turkey
| | - Dilan Kopuz
- Assistant Professor, Department of Restorative Dentistry, Istanbul Kent University, Istanbul, Turkey.
| | - Eda Yazıcı Özcelik
- Research Assistant, Department of Microbiology and Clinical Microbiology, Kocaeli University, Kocaeli, Turkey
| | - Fetiye Kolaylı
- Professor, Department of Microbiology and Clinical Microbiology, Kocaeli University, Kocaeli, Turkey
| | - Safa Tuncer
- Professor, Department of Restorative Dentistry, Istanbul University, Istanbul, Turkey
| | - Mustafa Demirci
- Professor, Department of Restorative Dentistry, Istanbul University, Istanbul, Turkey
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Mondal K, Rockne KJ, Drummond JL, O'Brien EP, Chen CC, Hanley L. Dental composite biodeterioration in the presence of oral Streptococci and extracellular metabolic products. J Dent 2024; 142:104861. [PMID: 38278316 DOI: 10.1016/j.jdent.2024.104861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 01/28/2024] Open
Abstract
OBJECTIVE Secondary caries is a primary cause of early restoration failure. While primary dental caries has been extensively researched, our knowledge about the impact of secondary caries on dental restorations is relatively limited. In this study, we examined how different clinically relevant microbially-influenced environments impact the degradation of nano-filled (FIL) and micro-hybrid (AEL) dental composites. METHODS Material strength of two commercial dental composites was measured following incubation in aqueous media containing: i) cariogenic (Streptococcus mutans) and non-cariogenic bacteria (Streptococcus sanguinis) grown on sucrose or glucose, ii) abiotic mixtures of artificial saliva and sucrose and glucose fermentation products (volatile fatty acids and ethanol) in proportions known to be produced by these microorganisms, and iii) abiotic mixtures of artificial saliva and esterase, a common oral extracellular enzyme. RESULTS Nano-filled FIL composite strength decreased in all three types of incubations, while micro-hybrid AEL composite strength only decreased significantly in biotic incubations. The strength of both composites was statistically significantly decreased in all biotic incubations containing both cariogenic and non-cariogenic bacteria beyond that induced by either abiotic mixtures of fermentation products or esterase alone. Finally, there were no statistically significant differences in composite strength decrease among the tested biotic conditions. CONCLUSIONS The results show that conditions created during the growth of both cariogenic and non-cariogenic oral Streptococci substantially reduce commercial composite strength, and this effect warrants further study to identify the mechanism(s). CLINICAL SIGNIFICANCE Dental biofilms of oral Streptococci bacteria significantly affect the mechanical strength of dental restorations.
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Affiliation(s)
- Karabi Mondal
- Department of Civil, Materials, and Environmental Engineering, University of Illinois-Chicago, Chicago, IL, USA
| | - Karl J Rockne
- Department of Civil, Materials, and Environmental Engineering, University of Illinois-Chicago, Chicago, IL, USA.
| | - James L Drummond
- Professor Emeritus of Restorative Dentistry, University of Illinois Chicago, Chicago, IL, USA
| | - Evan P O'Brien
- Department of Civil, Materials, and Environmental Engineering, University of Illinois-Chicago, Chicago, IL, USA
| | - Chien-Chia Chen
- Department of Chemistry, University of Illinois-Chicago, Chicago, IL, USA
| | - Luke Hanley
- Department of Chemistry, University of Illinois-Chicago, Chicago, IL, USA
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Elmalawany LM, El-Refai DA, Alian GA. Change in surface properties of two different dental resin composites after using various beverages and brushing. BMC Oral Health 2023; 23:966. [PMID: 38053124 PMCID: PMC10696683 DOI: 10.1186/s12903-023-03710-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/24/2023] [Indexed: 12/07/2023] Open
Abstract
BACKGROUND The study aimed to evaluate the influence of various beverages; with and without brushing; on the surface mechanical properties of two resin composites. METHODS A total of 160 disc-shaped specimens were prepared for each of the following dental composites; nanohybrid ormocer (Admira fusion, VOCO GmbH, Cuxhaven, Germany) and nanohybrid resin composite (Grandio, VOCO GmbH, Cuxhaven, Germany). The baseline surface hardness and roughness measurements were carried out after 24 h. The composite samples were randomly distributed into one of the two groups; brushing and non-brushing, which were further divided into one of the four subgroups (n = 10); artificial saliva as control, coffee, red wine, and soft drink. In the non-brushing group, the specimens were immersed in the different beverages for five minutes three times daily for 30 days. The same procedure was done for the brushing group, in addition to brushing the specimens for five seconds. The surface hardness and roughness measurements were repeated after 30 days. One-way ANOVA and independent t-tests were used for statistical analysis. RESULTS The soft drink had the most deteriorating effect and artificial saliva had the least. The change in surface properties was higher in the brushing subgroups. Grandio exhibited a higher change in surface microhardness while Admira fusion exhibited a higher change in surface roughness. CONCLUSIONS The surface properties of both dental resin composites were negatively affected by using beverages and brushing.
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Affiliation(s)
- Lamia M Elmalawany
- Biomaterials Department, Faculty of Dentistry, Ain-Shams University, African Union Organization Street, Abbasia, Cairo, 11566, Egypt.
| | - Dina A El-Refai
- Biomaterials Department, Faculty of Dentistry, Ain-Shams University, African Union Organization Street, Abbasia, Cairo, 11566, Egypt
| | - Ghada A Alian
- Biomaterials Department, Faculty of Dentistry, Ain-Shams University, African Union Organization Street, Abbasia, Cairo, 11566, Egypt
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MAIA TS, LIMA TD, RAMOS VM, FARIA-E-SILVA AL, MENEZES MDS. Effect of modeling liquids on resin composite roughness and color parameters after staining and toothbrushing. Braz Oral Res 2023; 37:e024. [PMID: 37018806 DOI: 10.1590/1807-3107bor-2023.vol37.0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 05/02/2022] [Indexed: 04/05/2023] Open
Abstract
This study evaluated surface roughness, color stability, whitening index, and opacity of different types of modeling liquids for resin composite coating after exposure to staining and toothbrushing. Disc-shaped resin composite (Vittra APS, FGM) specimens were fabricated and divided into four groups (n = 10 each): control group, Composite Wetting resin (Ultradent Products), Adper Scotchbond Multipurpose adhesive (3M ESPE), and Adper Universal adhesive (3M ESPE). Surface roughness (Ra) was measured using a rugosimeter, while color stability (∆E00), whitening index (WI), and opacity (%) were measured using a spectrophotometer. Assessments were made at four time points: after polishing (baseline, T1), after immersion in red wine for 24 h (T2), and after 5,000 (T3) and 10,000 (T4) cycles of toothbrushing. Scanning electron microscopy images were captured to analyze the scratches created. The data were statistically analyzed by two-way repeated-measures analysis of variance and Tukey's honestly significant difference tests (α = .05). Modeling with the Wetting resin resulted in higher surface roughness (p < 0.05) and low color stability, which were attributable to porosities. Higher color change values were observed in the control group after staining. Both adhesives showed the lowest mean ΔE00 values (p < 0.005). WI decreased after staining, except with the use of the Universal adhesive (p < 0.005). The lowest opacity values were observed at baseline for all groups (p < 0.005). The Universal and Scotchbond adhesives had lower surface roughness, better color stability, higher WI, and the lowest opacity values after staining with red wine and toothbrushing.
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Garcia RM, Vieira Junior WF, Sobral-Souza DF, Aguiar FHB, Lima DANL. Characterization of whitening toothpastes and their effect on the physical properties of bulk-fill composites. J Appl Oral Sci 2023; 31:e20220428. [PMID: 37194790 DOI: 10.1590/1678-7757-2022-0428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 03/30/2023] [Indexed: 05/18/2023] Open
Abstract
To characterize activated charcoal and 2% hydrogen peroxide-based toothpastes and investigate their effects on roughness, color change, and gloss of bulk-fill composite resin. Composite resin specimens (Aura Bulk Fill, SDI) were subjected to 5,000 brushing cycles with regular toothpaste (Colgate Total 12, [RT]), activated charcoal toothpaste (Bianco Dental Carbon, [AC]), or hydrogen peroxide-containing toothpaste (Colgate Luminous White Advanced, [HP]), with or without coffee exposure. The pH, particle characterization by scanning electron microscopy (SEM), and weight% of solid particles in the toothpaste were assessed. Roughness (Ra) was evaluated using a surface profile-measuring device, color change (∆Eab/∆E00) by reflectance spectrophotometer, and gloss unit (GU) by glossmeter. Kruskal-Wallis, Dunn, Friedman, and Nemenyi tests were used, and the correlation coefficient test was performed between Ra and GU (α=0.05). RT presented a higher Ra after brushing and did not change after staining with coffee; moreover, the ∆Eab/∆E00 values were higher for RT than HP. Regarding gloss, AC and HP obtained higher values compared to RT. A significant negative correlation between gloss and Ra was found for RT exposed to coffee. All toothpastes had a neutral pH; however, RT had the largest percentage of solids by weight. SEM images showed particles of many sizes: irregular shape (RT), more regular particles (AC), and spherical clusters (HP). Although surface roughness, color change, and gloss may compromise the longevity of restorations, the whitening toothpastes tested did not promote more morphology changes than regular toothpastes.
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Affiliation(s)
- Raíssa Manoel Garcia
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Odontologia Restauradora, Piracicaba, SP, Brasil
| | | | - Danielle Ferreira Sobral-Souza
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Odontologia Restauradora, Piracicaba, SP, Brasil
| | - Flávio Henrique Baggio Aguiar
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Odontologia Restauradora, Piracicaba, SP, Brasil
| | - Débora Alves Nunes Leite Lima
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Odontologia Restauradora, Piracicaba, SP, Brasil
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Vilela ALR, Machado AC, Queiroz LL, Batista PHM, Faria-E-Silva AL, Menezes MDS. Effect of Interval Time between Corrosive and Abrasive Challenges on a Nanoparticulate Composite Resin. Eur J Dent 2021; 15:607-611. [PMID: 34492727 PMCID: PMC8630937 DOI: 10.1055/s-0041-1726161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Objective
This study aimed to evaluate the effect of interval time after acidic beverage intake and brushing on roughness and hardness of resin composite.
Materials and Methods
Nanofilled resin composites were tested as per interval time (no interval, 15 or 30 minutes) between aging media (isotonic, sports drink) and brushing. Specimens (
n
= 9) were subjected to three cycles daily for 5 days with immersion in beverage followed by simulated brushing (585 strokes). The brushing (control) group was submitted only in brushing cycles. Roughness and microhardness were analyzed in the baseline and end of the experiment. Surface morphology was analyzed by using scanning electron microscopy (SEM).
Statistical analysis
Data were analyzed by one-way ANOVA and Tukey’s honestly significant difference (α = 0.05).
Results
Roughness was higher in no interval group and lower in 30 minutes and control. The 15 minutes present no statistical difference between control, 30 minutes and no interval. The hardness not present difference between groups. The SEM showed the no interval more roughness than 15 and 30 minutes, control and baseline.
Conclusion
The interval time between erosive and abrasive challenge is important to preserve the smoothness surface of composite resin.
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Affiliation(s)
- Ana Laura Rezende Vilela
- Department of Restorative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Brazil
| | | | - Lucas Lemes Queiroz
- Department of Restorative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Brazil
| | - Pedro Henrique Mauro Batista
- Department of Restorative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Brazil
| | | | - Murilo de Sousa Menezes
- Department of Restorative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Brazil
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Ferretti MA, Pereira R, Lins RBE, Soares MGC, Pinto LJH, Martins LRM, Aguiar FHB. Characterization of low-cost Brazilian resin composites submitted to tooth brushing. Braz Oral Res 2020; 35:e010. [PMID: 33206783 DOI: 10.1590/1807-3107bor-2021.vol35.0010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 08/21/2020] [Indexed: 11/22/2022] Open
Abstract
This in vitro study aimed to evaluate surface microhardness, roughness, color, gloss and topography of low-cost Brazilian resin composites, compared with an international one. All 120 samples (8mm ø x 2mm height) were prepared and divided into 5 groups: Ultrafill (Biodinâmica), Llis (FGM), Fill Magic (Coltene), Applic (Makira), and Filtek Z250XT (3M Oral Care). Surface microhardness (KHN) (n=10) was analyzed at two time periods: before and after simulated tooth brushing (STB). Other standardized samples of each group (n=10) were analyzed for surface roughness (Ra), color (ΔL, Δa, Δb, ΔE, ΔE00) and gloss unit (GU) at the same two periods. The topography of non-brushed and brushed samples of each group (n=4) was evaluated by scanning electron microscopy. Data were analyzed statistically by two-way repeated measures ANOVA with Bonferroni post-hoc test (KHN, Ra, GU), and one-way ANOVA with Tukey post-hoc test (ΔL, Δa, Δb, ΔE, ΔE00) (α=0.05). Topographic images were submitted to descriptive analysis. The low-cost Brazilian resin composites investigated were compared with the international one and revealed: lower KHN, regardless of before or after STB; statistically similar Ra before STB, except Ultrafill, which presented higher values; lower Ra after STB, except Ultrafill, which presented statistically similar values; statistically similar color change in ΔL, Δa, Δb parameters; statistically similar color change in ΔE, ΔE00 parameters, except Fill Magic, which presented lower values; lower gloss before STB; lower gloss after STB, except Ultrafill, which presented statistically similar values. In a situation of scarce resources, low-cost Brazilian composites might be an acceptable cost-effective restorative alternative.
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Affiliation(s)
- Marcela Alvarez Ferretti
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
| | - Renata Pereira
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
| | - Rodrigo Barros Esteves Lins
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
| | - Mariana Gusmão Corsini Soares
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
| | - Larissa Jacó Hessel Pinto
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
| | - Luís Roberto Marcondes Martins
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
| | - Flávio Henrique Baggio Aguiar
- Universidade Estadual de Campinas - Unicamp, Piracicaba Dental School, Department of Restorative Dentistry, Piracicaba, SP, Brazil
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Mechanical performance of monolithic materials cemented to a dentin-like substrate. J Prosthet Dent 2020; 123:753.e1-753.e7. [DOI: 10.1016/j.prosdent.2019.12.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/16/2019] [Accepted: 12/16/2019] [Indexed: 11/21/2022]
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OLIVEIRA RS, SIMÕES HB, ODILON NN, LIMA MJP, CAMPOS EDJ. Effect of whitening dentifrices containing optical agent on the variation of color, roughness and mass of a nanoparticulate composite resin. REVISTA DE ODONTOLOGIA DA UNESP 2020. [DOI: 10.1590/1807-2577.07320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Introduction Blue covarine is a pigment that promotes optical changes in dental surfaces, providing whitening. Objective To evaluate in vitro the effect of bleaching dentifrices containing Blue covarine in nanoparticulate composite resin subjected to artificial darkening. Material and method One hundred sixty (160) specimens (PBs) of FILTEK Z350XT nanoparticulate composite resin were randomly divided into two experiments: Experiment I - 8 groups (n=10) submitted to brushing with an electric toothbrush for 1 month; Experiment II - 8 groups (n=10) submitted to simulated brushing for 6, 12 and 24 months. Groups were distributed according to the solution/dentifrice tested: CG (distilled water) and 7 test groups (GT1- Coltene Herjos, GT2- Colgate Total 12 Clean Mint, GT3- Colgate Luminous White Brilliant Mint, GT4- Oral B 3D White Perfection, GT5- Close Up White Now Glacier Fresh, GT6- Close Up White Attraction Diamond and GT7- Sorriso Xtreme White Evolution). Result In Experiment I, there was greater ∆E in GT6 in relation to CG, GT2, GT4 and GT5, with no differences among them. In Experiment II, after 24 months of brushing, there was greater ∆E in groups GT6 and GT7. After 24 months of simulated brushing, there was no change in roughness or loss of mass in any group. Conclusion The whitening effect promoted by dentifrices containing the agent Blue covarine seems to be related to the association of this agent with the abrasives present in the formulations of whitening dentifrices.
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Rodrigues CS, Nora BD, Mallmann A, May LG, Jacques LB. Repolishing Resin Composites After Bleaching Treatments: Effects on Color Stability and Smoothness. Oper Dent 2019; 44:54-64. [DOI: 10.2341/17-107-l] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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