scholarly journals Influence of Acid, Ethanol, and Anthocyanin Pigment on the Optical and Mechanical Properties of a Nanohybrid Dental Composite Resin

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1234 ◽  
Author(s):  
Sukhyun Hwang ◽  
Shin Chung ◽  
Jung-Tae Lee ◽  
Yong-Tae Kim ◽  
Yoo Kim ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Optical Properties ◽  
Repeated Measures ◽  
Composite Resin ◽  
Color Change ◽  
Pearson Correlation ◽  
Dental Composite ◽  
Anthocyanin Pigment ◽  
Significant Difference ◽  
Dental Composite Resin

This study investigated the influences of acidity, ethanol, and pigment on the optical properties, microhardness, and surface roughness (Ra) of a nanohybrid dental composite resin. A total of 108 disc-shaped specimens were fabricated using a nanohybrid dental composite and allocated into 36 different storage solutions according to the levels of pH (2.0, 3.0, 4.0, and 5.5), ethanol (0%, 20%, and 40%), and anthocyanin pigment (0%, 2.5%, and 12.5%). Measurements of the colorimetric parameter and the amount of color change (ΔE), translucency parameter (TP), microhardness, and surface roughness (Ra) were performed at 24 h (baseline), 1-, 2-, 3-, and 4-weeks. Repeated measures of analysis of variance (ANOVA) with a Tukey honestly significant difference test and Pearson correlation analysis were carried out (α = 0.05). Pigment of 12.5% or 40% ethanol significantly increased the ΔE (P < 0.001, P = 0.048, respectively). Pigment of 2.5% or 12.5% significantly decreased the TP (P = 0.001, P < 0.001, respectively). Microhardness of composite resin stored in pH 2.0, 3.0, 4.0 solution was lower than that for pH 5.5 (P < 0.001). Pigment, ethanol, and pH did not influence the Ra. TP change and ΔE, and Ra and ΔE had a significant positive correlation (P < 0.05). In conclusion, pigment and ethanol levels influenced the optical properties and acidity affected the microhardness of composite resin.

Rare Earth Oxide Containing Filler for Dental Composite Resin

2012 ◽  
Vol 529-530 ◽  
pp. 512-515 ◽  
Author(s):  
Motohiro Uo ◽  
Yasuo Nakajima ◽  
Yuya Asakawa ◽  
Takahiro Wada ◽  
Toshio Hongo ◽  
...  
Keyword(s):  
Rare Earth ◽  
Visual Inspection ◽  
Composite Resin ◽  
Color Change ◽  
Glass Ceramics ◽  
Rare Earth Oxide ◽  
Dental Composite ◽  
Filling Material ◽  
Near Ultraviolet ◽  
Dental Composite Resin

A composite resin (CR) with photo-polymerization is widely used for dental filling material. Because of their good esthetics, the visual inspection of restored teeth becomes difficult. In this study, the fluorescent glass/ceramics fillers containing rare earth oxides — which are well-known fluorescent materials — was prepared and applied in CR to enhance visual inspection capability with small influence in color. Eu2O3-containing Y2O3 filler (Y2O3:Eu) prepared with homogeneous coprecipitaion method showed clear fluorescence at 614nm with near ultraviolet light (385nm) excitation. The fluorescence intensity of the prepared Y2O3:Eu filler increased with increase of Eu content in the Y2O3 filler upto 15mol% of Eu content. The composite resin was prepared with the mixed filler of Y2O3:Eu filler and the conventional glass filler. The content of Y2O3:Eu was varied between 0 to 40wt% of mixed filler. The prepared composite resin also showed clear fluorescence with quite small affect to the color change and the Vickers hardness of composite resin. Therefore, the prepared rare earth oxide containing Y2O3 filler was applicable as the filler of dental composite resin.

scholarly journals Abrasive wear and surface roughness of contemporary dental composite resin

2014 ◽  
Vol 33 (6) ◽  
pp. 725-732 ◽  
Author(s):  
Jian-min HAN ◽  
Hongyu ZHANG ◽  
Hyo-Sun CHOE ◽  
Hong LIN ◽  
Gang ZHENG ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Abrasive Wear ◽  
Composite Resin ◽  
Dental Composite ◽  
Dental Composite Resin

Scanning Electron Microscopy and Roughness Study of Dental Composite Degradation

2012 ◽  
Vol 18 (2) ◽  
pp. 289-294 ◽  
Author(s):  
Luís Eduardo Silva Soares ◽  
Louise Ribeiro Cortez ◽  
Raquel de Oliveira Zarur ◽  
Airton Abrahão Martin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Roughness ◽  
Composite Resin ◽  
Morphological Changes ◽  
Soft Drink ◽  
Dental Composite ◽  
Control Group ◽  
Significant Difference ◽  
Scanning Electron

AbstractOur aim was to test the hypothesis that the use of mouthwashes, consumption of soft drinks, as well as the type of light curing unit (LCU), would change the surface roughness (Ra) and morphology of a nanofilled composite resin (Z350® 3M ESPE). Samples (80) were divided into eight groups: Halogen LCU, group 1, saliva (control); group 2, Pepsi Twist®; group 3, Listerine®; group 4, Colgate Plax®; LED LCU, group 5, saliva; group 6, Pepsi Twist®; group 7, Listerine®; group 8, Colgate Plax®. Ra values were measured at baseline, and after 7 and 14 days. One specimen of each group was prepared for scanning electron microscopy analysis after 14 days. The data were subjected to multifactor analysis of variance at a 95% confidence followed by Tukey's honestly significant difference post-hoc test. All the treatments resulted in morphological changes in composite resin surface, and the most significant change was in Pepsi Twist® groups. The samples of G6 had the greatest increase in Ra. The immersion of nanofilled resin in mouthwashes with alcohol and soft drink increases the surface roughness. Polymerization by halogen LCU (reduced light intensity) associated with alcohol contained mouthwash resulted in significant roughness on the composite.

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 Evaluation of the effects of polishing systems on surface roughness and morphology of dental composite resin

BDJ ◽  
2020 ◽  
Vol 228 (7) ◽  
pp. 527-532 ◽  
Author(s):  
Julie Wheeler ◽  
Sanjukta Deb ◽  
Brian J. Millar
Keyword(s):  
Surface Roughness ◽  
Composite Resin ◽  
Dental Composite ◽  
Dental Composite Resin

Dentate nucleus signal intensity changes on T1-weighted MRI after repeated administrations of linear and macrocyclic gadolinium-based contrast agents: a pediatric intraindividual case-control study

2021 ◽  
pp. 028418512110188
Author(s):  
Kerem Ozturk ◽  
David Nascene
Keyword(s):  
Repeated Measures ◽  
Signal Intensity ◽  
Dentate Nucleus ◽  
Pearson Correlation ◽  
Gadopentetate Dimeglumine ◽  
Control Groups ◽  
Significant Difference ◽  
Intensity Changes ◽  
Cerebellar Peduncle ◽  
Pediatric Brain

Background An association between consecutive administrations of macrocyclic gadolinium-based contrast agent (mcGBCA) gadobutrol and linear (L)-GBCA gadopentetate dimeglumine and gadolinium retention in the pediatric brain remains incompletely understood. Purpose To compare signal intensity (SI) changes in the dentate nucleus (DN) on unenhanced T1-weighted imaging (T1WI) in children who obtained mcGBCA gadobutrol with those who had previously received L-GBCA gadopentetate dimeglumine. Material and Methods This retrospective study included 27 children who received L-GBCA gadopentetate dimeglumine followed by mcGBCA gadobutrol and two different control groups matched for age and sex for both periods, each involving 27 individuals with no GBCA administration from January 2010 to January 2020. DN-to-middle cerebellar peduncle (MCP) SI ratios on T1WI were determined. A repeated-measures ANOVA was performed to compare the T1WI SI ratio between children exposed to GBCA in each of the two periods and controls. Pearson correlation analysis was conducted to determine any correlation between SI ratios and confounding parameters. Results T1WI SI ratio was significantly higher in those who had only L-GBCA (1.005±0.087) or subsequent mcGBCA gadobutrol (1.002±0.104) than in control groups 1 (0.927±0.041; P<0.001) and 2 (0.930±0.041; P=0.002), respectively, but no significant difference of the T1WI SI ratio was noted between L-GBCA period and subsequent mcGBCA gadobutrol period ( P=0.917). T1WI SI ratios and the L-GBCA administration number revealed a modest but significant correlation (correlation coefficient=0.034; P=0.016). Conclusion Previous administration of gadopentetate dimeglumine is associated with increased T1WI SI in the DN, while subsequent administration of gadobutrol does not demonstrate any additional SI increase in the pediatric brain.

Effect of layered double hydroxide intercalated with fluoride ions on the physical, biological and release properties of a dental composite resin

2014 ◽  
Vol 42 (1) ◽  
pp. 60-67 ◽  
Author(s):  
Loredana Tammaro ◽  
Vittoria Vittoria ◽  
Anna Calarco ◽  
Orsolina Petillo ◽  
Francesco Riccitiello ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Composite Resin ◽  
Dental Composite ◽  
Fluoride Ions ◽  
Dental Composite Resin ◽  
Double Hydroxide

Surface properties of composite resins with and without fluorides for bracket bonding / Propriedades de superfície de resinas compostas com e sem fluoretos para colagem de suportes

2021 ◽  
Vol 7 (7) ◽  
pp. 67267-67276
Author(s):  
Emillyn Jones Greijal Dias Holanda ◽  
José Guilherme Neves ◽  
Milton Santamaria-Jr ◽  
Silvia Amélia Scudeler Vedovello ◽  
Ana Rosa Costa ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Properties ◽  
Color Change ◽  
Composite Resins ◽  
Hardness Tester ◽  
Significant Difference ◽  
Post Test ◽  
Roughness Analysis ◽  
Diamond Paste ◽  
Penetration Time

The aim of this study was to evaluate the surface properties of orthodontic resins with and without fluoride. Forty disks, measuring 2 mm thick by 6 mm in diameter, were made of 4 bracket-bonding composite resins (n=10): Transbond Plus Color Change-3M/Unitek (TPCC); Transbond XT- 3M/Unitek (TXT), Orthocem -FGM (OC); Orthocem UV Trace-FGM (OCUV). The discs were photoactivated for 40 seconds with irradiance of 450 mW/cm2 and manually polished in sequence by silicon carbide sandpapers with 1200 and 2000 grain size and finished with diamond paste and felt disc. The surface microhardness analysis was performed using a Shimadzu Micro Hardness Tester HMV-2,000 (Shimadzu Corporation, Kyoto, Japan) with a load of 50 gF and a 5 second penetration time. Surface roughness readings were taken using a Surf Corder Roughness Meter (SE 1700- Kosaka, Lisboa-Portugal). For data analysis, ANOVA (one-way) was used, followed by Tukey's post-test (?=0.05). The microhardness results showed a difference (p?0.05) in the means of the orthodontic resins between TPCC and TXT with the other groups. After the surface roughness analysis, the averages showed that TPCC resin showed higher roughness compared to OC and OCUV (p?0.05), and there was no statistical difference with TXT. It was concluded that statistically the composite resins with fluoride showed significant difference regarding hardness and roughness.

Sign in / Sign up

Export Citation Format

Share Document