scholarly journals Effect of finishing and polishing on color stability of a nanofilled resin immersed in different media

2014 ◽  
Vol 43 (5) ◽  
pp. 338-342
Author(s):  
Ana Luísa Botta Martins de OLIVEIRA ◽  
Camila Cruz LORENZETTI ◽  
Patrícia Petromilli Nordi Sasso GARCIA ◽  
Elisa Maria Aparecida GIRO
Keyword(s):  
Stainless Steel ◽  
Composite Resin ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Color Stability ◽  
Steel Mold ◽  
Significance Level ◽  
Significant Difference ◽  
Cielab System ◽  
Polishing Procedures

OBJECTIVE: The purpose of this study was to evaluate the effect of finishing and polishing on color stability of a nanofilled composite resin (Filtek Z350 XT) according to different immersion media.MATERIAL AND METHOD: Composite disks (10 mm diameter, 2 mm thickness) were prepared for each group (n = 6) using a stainless steel mold. The groups were divided according to the presence or absence of finishing and polishing procedure and immersion media (artificial saliva, artificial juice- KAPO(r) Coca-Cola(r)flavors: pineapple, orange, strawberry and grape). The finishing and polishing procedures were performed using Super -Snap(r) disks. The specimens were stored in artificial saliva for 24 hours (baseline) and were analyzed using a color spectrophotometer by CIELab system. Then, they were immersed in different media for 5 minutes, 3 times a day, every 4 hours during 60 days. They were stored in artificial saliva at 37 ± 1°C during the immersion intervals. After this time, new measure of color was performed. The data were analyzed using Kruskall-Wallis test and Mann- Whitney test. The significance level was 5%.RESULT: The results showed that the finishing/polishing not significantly influence the color stability of resin composite (p > 0.05). There was no statistically significant difference in the color stability of the studied resin after immersion in different media (p > 0.05).CONCLUSION: The finishing and polishing procedures and the immersion media did not have influence on color stability of nanofilled resin Filtek Z350 XT.

scholarly journals Oxygen Inhibition of Surface Composites and Its Correlation with Degree of Conversion and Color Stability

2021 ◽  
Vol 32 (1) ◽  
pp. 91-97
Author(s):  
Marcela Gonçalves Borges ◽  
Gisele Rodrigues Silva ◽  
Fernanda Teodoro Neves ◽  
Carlos José Soares ◽  
André Luís Faria-e-Silva ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Composite Resin ◽  
Color Stability ◽  
Composite Resins ◽  
Degree Of Conversion ◽  
Oxygen Inhibition ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Surface Composites ◽  
Cielab System ◽  
Polishing Procedures

Abstract This study investigated the effects of oxygen inhibition and finishing/polishing procedures on the composite resin properties. One bulk-fill and two conventional composite resins (nanoparticle and microhybrid) were evaluated. Specimens were prepared using 4 surface treatments: control, no treatment; Gly, oxygen inhibition with glycerin; FP, finishing and polishing; Gly + FP, glycerin followed by finishing and polishing. The degree of conversion (DC) was measured using Fourier Transformed Infrared Spectroscopy (FTIR) immediately and after 15 days (n=5). Color stability (ΔEab, and ΔE00) and opacity were evaluated using a spectrophotometer after 15 days of immersion in coffee, using the CIELAB system (n=5). Data were analyzed by two-way ANOVA and Tukey tests (α=0.05) and opacity by two-way repeated-measures ANOVA. Glycerin usage increased significantly the DC however had no influence on the ΔEab, ΔE00 and, opacity values. Finishing and polishing reduced ΔEab and ΔE00 values, regardless of composite resins. Microhybrid showed higher opacity, followed by the nanoparticle and bulk fill, regardless of surface treatment. Post-polymerization polishing procedures resulted in lower conversion than using an oxygen inhibitor agent (Gly condition), but similar staining caused by coffee.

scholarly journals Roughness and stability of compound resin color exposed to bleaching strips after surface treatment

2020 ◽  
Vol 68 ◽  
Author(s):  
Izabelle Fiamma Alves Pessoa Matias CALIXTO ◽  
Michelly Rodrigues Dantas GAMA ◽  
Júlia Peixoto CAMPOS ◽  
Celina Wanderley de ABREU ◽  
Lucas Lactim FERRAREZ ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Treatment ◽  
Composite Resin ◽  
Color Change ◽  
Color Stability ◽  
System L ◽  
Significant Difference ◽  
Subsequent Exposure ◽  
Cielab System ◽  
Level Of Significance

ABSTRACT Objective to analyze the surface roughness and color stability of the composite resin after surface treatment with the aluminum oxide discs and subsequent exposure to the Advanced Teeth Whitening Strips. Methods 20 specimens of the Filtek Z350XT restorer (3M®) were prepared and daily subjected to home bleaching for 30 minutes during 14 days. A precision rugosimeter was used in order to verify the roughness by means of 3 random readings in the same direction in each sample. For color stability the CIELAB system (L*, a*, b* values) was used through the spectrophotometer (MINOLTA CR -321, Japan). The means of the test specimens as well as the mean of each group were calculated using the random readings. Data statistical analysis were performed by ANOVA- analysis of variance. The level of significance was set at 5% (p ≤ 0.05). Results Roughness did not present great numerical variations. No statistically significant difference between the means obtained concerning the surface roughness of the composite resin with p = 0.44 was observed. However, it was found that there was a statistically significant difference between the means obtained in relation to the color stability of the composite resin, p=0. 007. Conclusion It was concluded that pre-contoured strips containing 6% hydrogen peroxide do not have a significant adverse effect on the roughness of Z350XT (3M®) resin. However, it was also concluded that according to the color stability analysis performed, there may be an indication of the restoration replacement after the bleaching treatment, due to their color change.

scholarly journals Color Stability and Micro-Hardness of Bulk-Fill Composite Materials after Exposure to Common Beverages

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 787 ◽  
Author(s):  
Nora Bahbishi ◽  
Waad Mzain ◽  
Bayan Badeeb ◽  
Hani M. Nassar
Keyword(s):  
Composite Materials ◽  
Mixed Model ◽  
Vickers Microhardness ◽  
Color Stability ◽  
Repeated Measure ◽  
Water Control ◽  
Steel Mold ◽  
Significance Level ◽  
Significant Difference ◽  
Other Regarding

Objectives: To assess the color stability and surface microhardness of Bulk-Fill composite materials available in the Saudi Arabia market. Methods: Five composite materials (Filtek Z350, Filtek Bulk-Fill, Tetric N-Ceram Bulk-Fill, Sonic Fill 2, and SDR) were investigated. Samples (n = 20; 10 mm in diameter and 2 mm in thickness) were fabricated using a stainless-steel mold and were immersed in tea, coffee, berry juice, and distilled water (control). Baseline (T0) shades of specimens were recorded using a spectrophotometer and after 10 (T1), 30 (T2), 60 (T3), and 90 days (T4) of immersion. Measurements were obtained against a black background and CIE L*a*b* data was used to calculate ΔE for each group. Vickers microhardness values were obtained at T0 and T4. Data was analyzed using mixed model repeated measure ANOVA at 0.05 significance level. Results: Time, material, and solution effects have statistically significant effect on ΔE. Tea was the most staining solution. Z350 was associated with the highest ΔE values while SDR showed the lowest values. No other materials showed significant difference between each other. Solutions were statistically different from each other. All materials were different from each other regarding microhardness. Conclusion: Bulk-Fill materials showed more color stability but lower microhardness values compared to universal resin control.

scholarly journals Pengaruh pH Saliva terhadap Kelarutan Ion Aluminium Pada Resin Komposit Nanohybrid

2017 ◽  
Vol 6 (2) ◽  
pp. 25
Author(s):  
Aufia Espressivo ◽  
Dyah Irnawati ◽  
Purwanto Agustiono
Keyword(s):  
Composite Resin ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Ph Variation ◽  
Aluminum Ion ◽  
Significant Difference ◽  
Salivary Ph ◽  
Nanohybrid Composite ◽  
Filler Particles ◽  
One Way Anova

Nanohybrid composite resin is a type of composite resin restorative material containing micro-sized filler particles incorporated with nanoparticles. Composite resin restoration in the oral cavity can release its filler particles, one of them is aluminum ion. The pH of saliva is varied. This research aimed to determine the influence of salivary pH on aluminum ion solubility of nanohybrid composite resin. The materials used were nanohybrid composite resin Tetric Evoceram (Ivoclar Vivadent, Austria) and artificial saliva with pH of 5.6, 6.7, and 8.0. Twelve disc-shaped composite resin samples sized 5 mm in diameter and 2 mm thick were made. Samples were polymerized using light curing unit for 20 seconds. Composite resin samples were divided into three pH groups (n=4) and then each sample was soaked in 10 mL artificial saliva inside of polyethylene bottle. The immersion was done in the incubator for 14 days at 37ºC. The concentration of aluminum ion in artificial saliva solutions subsequently was calculated using AAS. Data were analyzed using One-way ANOVA (a=0,05). The mean concentration of aluminum ion released into saliva with pH 5.6, 6.7, and 8.0 were 0.538 ± 0.996 ppm, 0.431 ± 0.981 ppm, and 0.350 ± 0.071 ppm respectively. The result of One-way ANOVA showed a significant influence of salivary pH variation to the solubility of aluminum ion on nanohybrid composite resin (p<0,05). LSD test showed a significant difference only between saliva pH 5,6 and 8,0. The conclusion of this research was that low salivary pH increased the solubility of aluminum ion on nanohybrid resin composite in saliva.

scholarly journals Varying the Polishing Protocol Influences the Color Stability and Surface Roughness of Bulk-Fill Resin-Based Composites

2020 ◽  
Vol 12 (1) ◽  
pp. 1
Author(s):  
Filipa Freitas ◽  
Teresa Pinheiro de Melo ◽  
António HS Delgado ◽  
Paulo Monteiro ◽  
João Rua ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Properties ◽  
Color Change ◽  
Resin Composite ◽  
Color Stability ◽  
Control Surface ◽  
Significance Level ◽  
Color Changes ◽  
Atomic Force ◽  
Polishing Procedures

Surface properties of composites such as roughness and color impact periodontal health and aesthetic outcomes. Novel bulk-fill composites with improved functionality are being introduced and, in light of the existing variety of finishing/polishing procedures, research of their surface properties is warranted. Sixty discs were prepared from bulk-fill composites (Filtek™ Bulk Fill Posterior Restorative and Fill-Up™) and incremental-fill Filtek™ Z250. They were further divided according to different polishing procedures (n = 5): three multi-step polishing procedures or finishing with a bur (control). Surface roughness (Ra) was measured using an atomic force microscope (The AFM Workshop TT-AFM). A spectrophotometer (Spectroshade Micro Optic) was used to determine color stability, after exposure to a coffee solution. Data were analyzed using two-way MANOVA (significance level of 5%). Resin composite type, polishing procedure, and their interaction had a statistically significant effect on surface roughness (p < 0.001) and color change (p < 0.001). Fill-Up™ exhibited the highest surface roughness and greatest color change. Differences in color change were statistically significant (p < 0.001). Filtek™ Bulk Fill registered the lowest surface roughness and color change, after the three-step polishing procedure. Both parameters were significantly correlated (ρ = 0.754, p < 0.001) and found to be material dependent and polishing-procedure dependent. Higher surface roughness relates to greater color changes.

scholarly journals Comparison the effect of charcoal-containing, hydrogen peroxide-containing, and abrasive whitening toothpastes on color stability of a resin composite; an in vitro study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sara Mehrgan ◽  
Hamid Kermanshah ◽  
Ladan Ranjbar Omrani ◽  
Elham Ahmadi ◽  
Niyousha Rafeie
Keyword(s):  
Hydrogen Peroxide ◽  
Resin Composite ◽  
Artificial Saliva ◽  
In Vitro Study ◽  
Color Stability ◽  
Blue Color ◽  
Yellow Color ◽  
Significant Difference ◽  
Color Shift

Abstract Background This study aimed to compare the effects of charcoal-containing, hydrogen peroxide-containing, and abrasive whitening toothpastes on color stability of a resin composite. Methods Forty-five specimens were fabricated of spectrum TPH3 composite resin and stored in artificial saliva for 24 h. Baseline color assessment was performed using a spectrophotometer device. Then, the specimens were randomly assigned into 5 experimental groups, namely distilled water (GC), Bencer (GB), colgate optic white (GO), perfect white black (GP) and colgate total whitening (GT) toothpastes. The specimens immersed in coffee solution for 10 min and brushed for 1 min with respective toothpaste and then stored in artificial saliva until the next day. This cycle was repeated for 30 days. After 30 days, the final color assessment was performed using the spectrophotometer. Data were analyzed using one-way ANOVA and Tukey tests. Results Experimental groups were not significantly different in terms of Δa and ΔE values. However, ΔL and Δb values showed significant difference among the groups. Regarding Δa, GT and GC groups showed red color shift while the other groups showed green color shift. Regarding Δb, all groups showed blue color shift except GT group which showed yellow color shift. Conclusion None of the whitening toothpastes could decrease discoloration caused by the coffee solution to the level below the perceptibility threshold except Colgate Optic White which reduced discoloration within the clinically acceptable perceptibility range.

Effect of layer thickness on residual monomer release in polymerization of bulk-fill composites

2021 ◽  
pp. 096739112199958
Author(s):  
Vahti Kılıç ◽  
Feridun Hurmuzlu ◽  
Yılmaz Ugur ◽  
Suzan Cangul
Keyword(s):  
Stainless Steel ◽  
Layer Thickness ◽  
Composite Resin ◽  
Ethanol Solution ◽  
Composite Resins ◽  
Residual Monomer ◽  
Steel Mold ◽  
Nanohybrid Composite ◽  
Composite Samples

The aim of the present study was to investigate and compare the quantity of residual monomers leached from the bulk-fill composites with different compositions polymerized at varying layer thickness. Three bulk-fill (X-tra-fil, Beautifil Bulk Restorative, Fill-Up) and a nanohybrid composite (Filtek Z550) were used for the study. The composite resin samples were prepared with a stainless steel mold. For each composite, two groups were constructed. The samples in the first group were prepared using the 2 + 2 mm layering technique. In the second group, the composite samples were applied as a 4 mm-thick one layer and polymerized. Then, each composite samples were kept in a 75% ethanol solution and residual monomers released from composite resins were analyzed with an HPLC device after 24hour and 1 month. The data were analyzed using Kruskal-Wallis and Mann-Whitney U tests. Except the Fill-Up, all of residual monomer elution from the bulk-fill composites was significantly affected by the layer thickness (p < 0.05). The greatest monomer release was detected at 1 month after polymerization as a single 4 mm layer for Beautifil Bulk Restorative. Fill-Up composite showed similar residual monomer release in polymerization at different layer thicknesses compared to other composite resins. In the 2 + 2 mm layering technique, the least monomer elution was detected in the Filtek Z550 composite group. While Bis-GMA was the most released monomer in X-tra fil composite, UDMA was the most released monomer in all other composite resins. During polymerization of the bulk-fill composite, the layer thickness of the composite applied may affect the amount of residual monomers released from the composite resins. Conventional composites may release less monomer than bulk-fill composites when used with layering.

scholarly journals Evaluation of color stability of different temporary restorative materials

2015 ◽  
Vol 44 (5) ◽  
pp. 262-267 ◽  
Author(s):  
José Vitor Quinelli Mazaro ◽  
Luiz Miguel Minani ◽  
Adriana Cristina Zavanelli ◽  
Caroline Cantieri de Mello ◽  
Cleidiel Aparecido Araújo Lemos
Keyword(s):  
Storage Time ◽  
Color Change ◽  
Artificial Saliva ◽  
Color Stability ◽  
Time Interval ◽  
Acrylic Resins ◽  
Significant Difference ◽  
Restorative Materials ◽  
Before And After ◽  
Level Of Significance

AbstractIntroductionTemporary restorative materials are widely used, however, little is know about their color stability.Objectiveto evaluate the color stability of the following temporary restorative materials: acrylic and bis-acrylic resins after immersion in pigmenting solutions for different periods of storage.Material and methodFour materials were tested (Dêncor/Clássico, Protemp 4/3M ESPE; Structur 2 SC/Voco; Luxatemp AM Plus/DMG) and 30 test specimens (15 mm in diameter and 2 mm thick) per material were fabricated. They were divided according to the storage medium (artificial saliva, saliva + cola type soda, and saliva + coffee) and storage time intervals (2, 5, 7 and 15 days). Color measurements were made before and after immersions, with use of a spectrophotometer, by means of the CIE L*a*b* system. The data were analyzed by the analysis of variance and the Tukey Test, at a level of significance of 5%.ResultAcrylic resin presented greater color stability in comparison with bis-acrylic resins (p<0.001). When bis-acrylic resins were compared no significant difference was observed between the resins Structur and Luxatemp (p=0.767). As regards solutions tested, coffee showed the highest color change values (p<0.001), and the longer the storage time interval, the greater was the color change in all the temporary restorative materials analyzed (p<0.001).ConclusionAcrylic resin presented greater color stability in comparison with bis-acrylic resins (p<0.001). Coffee caused the greatest color change, and immersion time was determinant in color stability of the temporary materials analyzed.

Effects of Immersion Media and Repolishing on Color Stability and Superficial Morphology of Nanofilled Composite Resin

2014 ◽  
Vol 20 (4) ◽  
pp. 1234-1239 ◽  
Author(s):  
Ana Luísa Botta Martins de Oliveira ◽  
Ana Carolina Botta ◽  
Juliana Álvares Duarte Bonini Campos ◽  
Patrícia Petromilli Nordi Sasso Garcia
Keyword(s):  
Statistical Difference ◽  
Composite Resin ◽  
Color Change ◽  
Artificial Saliva ◽  
Color Stability ◽  
Color Reading ◽  
Immersion Medium ◽  
Mixed Analysis ◽  
Mouth Rinses ◽  
Scanning Electron

AbstractThis study evaluated the influence of fluoride mouth rinses and repolishing on the superficial morphology and color stability of nanofilled resin. About 150 specimens were prepared and polished using aluminum oxide discs for 15 s with a pressure of 2 kg. The experimental groups were divided according to the immersion medium (artificial saliva, 0.5% sodium fluoride, Fluordent Reach, Oral B, Fluorgard) and repolishing procedure (without and with). The specimens were continuously immersed for 1 week. Thereafter, half of each sample was repolished. A color reading was performed after 24 h of immersion in the artificial saliva baseline, after continuous immersion, and after repolishing. The superficial morphology was examined using scanning electron microscopy (SEM) in a qualitative way. Color change (∆E) data were submitted to a mixed analysis of variance using a Shapiro–Wilk test (p>0.05 for the different immersion media) and Sidak’s test (p<0.05 for the differences between groups). In the interaction between the repolishing and the immersion media, Fluorgard showed a statistical difference between the ∆E values with and without repolishing (p<0.0001). On the SEM observations, both Fluordent Reach and Fluorgard caused degradation of the superficial resinous matrix of the composite after continuous immersion. This matrix was removed after repolishing.

scholarly journals Color stability of ceramic brackets immersed in potentially staining solutions

2015 ◽  
Vol 20 (4) ◽  
pp. 32-38 ◽  
Author(s):  
Bruna Coser Guignone ◽  
Ludimila Karsbergen Silva ◽  
Rodrigo Villamarim Soares ◽  
Emilio Akaki ◽  
Marcelo Coelho Goiato ◽  
...  
Keyword(s):  
Profile Analysis ◽  
Artificial Saliva ◽  
Rocky Mountain ◽  
Color Stability ◽  
Bonferroni Correction ◽  
Time Intervals ◽  
Significance Level ◽  
Paired Samples ◽  
Immersion Period ◽  
Ceramic Brackets

OBJECTIVE: To assess the color stability of five types of ceramic brackets after immersion in potentially staining solutions.METHODS: Ninety brackets were divided into 5 groups (n = 18) according to brackets commercial brands and the solutions in which they were immersed (coffee, red wine, coke and artificial saliva). The brackets assessed were Transcend (3M/Unitek, Monrovia, CA, USA), Radiance (American Orthodontics, Sheboygan, WI, USA), Mystique (GAC International Inc., Bohemia, NY, USA) and Luxi II (Rocky Mountain Orthodontics, Denver, CO, USA). Chromatic changes were analyzed with the aid of a reflectance spectrophotometer and by visual inspection at five specific time intervals. Assessment periods were as received from the manufacturer (T0), 24 hours (T1), 72 hours (T2), as well as 7 days (T3) and 14 days (T4) of immersion in the aforementioned solutions. Results were submitted to statistical analysis with ANOVA and Bonferroni correction, as well as to a multivariate profile analysis for independent and paired samples with significance level set at 5%.RESULTS: The duration of the immersion period influenced color alteration of all tested brackets, even though these changes could not always be visually observed. Different behaviors were observed for each immersion solution; however, brackets immersed in one solution progressed similarly despite minor variations.CONCLUSIONS: Staining became more intense over time and all brackets underwent color alterations when immersed in the aforementioned solutions.

Sign in / Sign up

Export Citation Format

Share Document