scholarly journals Surface Characteristics and Color Stability of Gingiva-Colored Resin Composites

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2540
Author(s):  
Aikaterini Petropoulou ◽  
Maria Dimitriadi ◽  
Spiros Zinelis ◽  
Aspasia Sarafianou ◽  
George Eliades
Keyword(s):  
Red Wine ◽  
Roughness Parameter ◽  
Color Stability ◽  
Surface Characteristics ◽  
Color Difference ◽  
Storage Conditions ◽  
Resin Matrix ◽  
Resin Composites ◽  
Optical Profilometry ◽  
Roughness Parameters

The purpose of this study was to investigate the surface characteristics and color stability of gingiva-colored composite restorative materials (Anaxgum—ANG, Ceramage—CMG and Gradia Gum—GRG). The microstructure, composition, degree of conversion (DC %) and 3D roughness (Sa, Sz, Sdr, Sc) were examined by LV-SEM/EDS, ATR-FTIR and optical profilometry, respectively. For the color stability (CIE L*, a*, b* system) and hardness (HV), measurements were performed at baseline and after 30 days storage in distilled water, coffee and red wine. The ANG and GRG contain prepolymerized particles in aromatic and aliphatic resin matrices, respectively, whereas CMG contains inorganic zirconia silicate/silica particles, in an aromatic resin matrix, with a smaller particle size and a higher surface area fraction. Urethane monomers were mainly identified in CMG and GRG. The DC% showed statistically insignificant differences between the materials. The same applied for the roughness parameters, except for the greatest Sdr in CMG. ANG showed a color difference (ΔE) of > 3.3 after immersion in all media, CMG in coffee and wine and GRG only in coffee. Sc was the only roughness parameter demonstrating correlations with the ΔL*, Δb* and ΔE*. The HV values showed insignificant differences between the storage conditions per material. There are important differences in the color stability of the materials tested, which were mostly affected by the roughness parameters due to variations in their microstructure.

scholarly journals Influences of Different Air-Inhibition Coatings on Monomer Release, Microhardness, and Color Stability of Two Composite Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Luca Marigo ◽  
Giuseppina Nocca ◽  
Giulia Fiorenzano ◽  
Cinzia Callà ◽  
Raffaella Castagnola ◽  
...  
Keyword(s):  
Red Wine ◽  
Color Stability ◽  
Multiple Comparisons ◽  
Storage Conditions ◽  
Resin Composites ◽  
Surface Microhardness ◽  
Argon Gas ◽  
Light Curing ◽  
Effect Of Light ◽  
Composite Restoration

The aim of this study was to evaluate the effect of light-curing protocols on two modern resin composites using different air-inhibition coating strategies. This was accomplished by assessing the amount of monomer elution, surface microhardness, and composite discoloration in different storage conditions. A total of 120 specimens were prepared using Filtek Supreme XTE (3M ESPE, Seefeld, Germany) and CeramX Universal (Dentsply DeTrey, Konstanz, Germany). Specimens were light-cured in air as per manufacturer’s instructions or in the absence of oxygen. This latter condition was achieved using three different approaches: (i) transparent polyester strip; (ii) glycerin; (iii) argon gas. Specimens were assessed for release of monomers, Vickers hardness, and discoloration after storage in different solutions. The results were analyzed with ANOVA one-way test followed by Student-Newman-Keuls test. Moreover, multiple comparisons of means were performed using the Student t-test (p<0.05). The amount of monomers released from the tested specimens was very low in all conditions. The presence of oxygen induced some decrease in microhardness. The highest discoloration values, for both materials, were obtained after ageing in red wine. In case finish and polish procedures are awkward to achieve in posteriors composite restoration, light-curing in the absence of oxygen should be considered, especially when performing composite restoration in esthetic areas.

Thermal, spectral, and surface properties of LED light-polymerized bulk fill resin composites

2015 ◽  
Vol 60 (1) ◽  
Author(s):  
Mehmet Burçin Pişkin ◽  
Pınar Yılmaz Atalı ◽  
Aysel Kantürk Figen
Keyword(s):  
Surface Properties ◽  
Light Emitting Diode ◽  
Surface Characteristics ◽  
Sem Analysis ◽  
Resin Matrix ◽  
Resin Composites ◽  
Light Emitting ◽  
Type Size ◽  
Scanning Electron ◽  
Fill Materials

AbstractThe aim of this study was to evaluate the thermal, spectral, and surface properties of four different bulk fill materials – SureFil SDR (SDR, Dentsplay DETREY), QuixFil (QF, Dentsplay DETREY), X-tra base (XB, Voco) X-tra fil (XF, Voco) – polymerized by light-emitting diode (LED). Resin matrix, filler type, size and amount, and photoinitiator types influence the degree of conversion. LED-cured bulk fill composites achieved sufficient polymerization. Scanning electron microscope (SEM) analysis revealed different patterns of surface roughness, depending on the composite material. Bulk fill materials showed surface characteristics similar to those of nanohybrid composites. Based on the thermal analysis results, glass transition (Tg) and initial degradation (Ti) temperatures changed depending on the bulk fill resin composites.

scholarly journals Composite resin susceptibility to red wine staining after water sorption

2013 ◽  
Vol 1 (2) ◽  
pp. 113
Author(s):  
Anderson Catelan ◽  
Gabriella Lopes de Rezende Barbosa ◽  
Thaís Yumi Umeda Suzukic ◽  
Bruno de Castro Ferreira Barreto ◽  
Maria Cecília Caldas Giorgi ◽  
...  
Keyword(s):  
Red Wine ◽  
Composite Resin ◽  
Water Immersion ◽  
Storage Period ◽  
Color Stability ◽  
Color Difference ◽  
Control Group ◽  
Period Data ◽  
One Way Anova ◽  
Composite Restoration

Color stability of restorative materials is essential for longevity of esthetic composite restoration over time. The aim of this investigation was assess the effect of prior water immersion on the color stability of a composite resin to red wine staining. Seventy disc-shaped specimens (6 mm x 1.5 mm) were carried out and randomized in 7 groups (n = 10), according to distilled water immersion time at 0 (control), 24, 48, 72,120,192, and 240 h. Baseline color was measured according to the CIE L*a*b* system using a reflection spectrophotometer (UV-2450, Shimadzu). After that, the specimens were storage in red wine for 7 days. Color difference (∆E) after aging was calculated based on the color coordinates before (baseline) and after storage period. Data were subjected to one-way ANOVA (alpha = 0.05). The different times of immersion in .water before to the red wine storage showed similar behavior on the color stability, without statistical difference compared to control group, immersed directly in the wine (p = 0.7057). The previous water uptake of composite resin evaluated did not decrease the susceptibility to red wine staining.

scholarly journals The Effect of Different Dietary and Therapeutic Solutions on the Color Stability of Resin-Matrix Composites Used in Dentistry: An In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6267
Author(s):  
Lígia Lopes-Rocha ◽  
José Manuel Mendes ◽  
Joana Garcez ◽  
Ana Góis Sá ◽  
Teresa Pinho ◽  
...  
Keyword(s):  
Red Wine ◽  
Color Change ◽  
Chemical Interaction ◽  
In Vitro Study ◽  
Color Stability ◽  
Organic Matrix ◽  
Resin Matrix ◽  
Matrix Composites ◽  
Resin Matrix Composite

The purpose of this study was to evaluate the color stability of aesthetic restorative resin-matrix materials after their immersion in different dietary and therapeutic solutions. Thirty disc-shaped specimens (10 × 2 mm) were prepared from three different types of resin-matrix composites used in dentistry (BE, FS, AF). The color coordinates (L*a*b*, ΔL*, Δa*, Δa*, Δb* and ΔE*) were measured using a VITA Easyshade 3D-Master (VITA Zahnfabrik, Bad Säckingen, Germany) before and after the immersion of the specimens in coffee, red wine, Coca-Cola®, Eludril Care®, and distilled water solutions for 40 h. The color change (ΔE*) was calculated and analyzed by the Kolmogorov -Smirnov test and the Kruskal -Wallis multiple-comparison test. All the restorative materials showed significant color (ΔE*) changes after their exposure to red wine, followed by coffee and Coca-Cola®; however, one nanohybrid resin-matrix composite showed a high color stability in such colored test solutions. The chemical composition and content of the organic matrix played a key role in the color stability of the resin-matrix composites. Clinicians should advise their patients about the chemical interaction between dietary substances and different resin-matrix composites.

scholarly journals Surface roughness in relation to altitude of hornbeam wood

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
Majid Kiaei ◽  
Rasoul Mosavi Paloj
Keyword(s):  
Surface Roughness ◽  
Native Species ◽  
Roughness Parameter ◽  
Surface Characteristics ◽  
Peak Height ◽  
Solid Wood ◽  
Wood Products ◽  
Roughness Parameters ◽  
Average Roughness ◽  
Test Pieces

Hornbeam wood (Carpinus betulus) is a native species from Iran and covers 33% of the commercial volume of Iranian woods. Surface quality of solid wood products is one of the most important properties influencing further manufacturing processes such as finishing or strength of adhesive joint. Wood surface roughness is affected by growth condition. The objective of this study was to evaluate effect of altitude index (400 m, 800 m and 1200 m) on the surface roughness of sanded hornbeam wood (C. Betulus). Surface characteristics of sanded specimens of hornbeam wood were made employing a stylus profilmeter. Average roughness (Ra), mean peak-to-valley height (Rz), root-mean square deviation of the profile (Rq), core roughness depth (Rk), reduced peak height (Rpk), and reduced valley depth (Rvk) roughness parameters were used to determine surface characteristics of the test pieces. Significant statistical differences were found among altitude indexes in reduced valley depth parameter and wood oven-dried density, but not for the other variables. This variable did not have significantly effect on other surface roughness parameters in hornbeam wood. The low altitude had a rougher surface than intermediate and high altitudes. There is no relationship between surface roughness parameter and wood oven-dried density. 

scholarly journals Laboratory Study of Color Stability of Different Types of Materials for Temporary Constructions

Folia Medica ◽  
2020 ◽  
Vol 62 (3) ◽  
pp. 553-562
Author(s):  
Atanas V. Doshev ◽  
Diyan Slavchev ◽  
Vasko Doshev
Keyword(s):  
Red Wine ◽  
Statistical Processing ◽  
Color Stability ◽  
Storage Conditions ◽  
Direct Access ◽  
Functional Requirements ◽  
Color Changes ◽  
Natural Teeth ◽  
Standard Value ◽  
Level Of Significance

Introduction: A temporary construction serves as a preliminary representation of the type and appearance of a future permanent one that is tailored to the patient&rsquo;s requirements. Like any prosthetic construction, it should meet the functional requirements, preserve or improve chewing and speech function. No matter how well maintained a prophylactic and functional prosthetic structure is, it will not be evaluated by the patient unless it retains and restores the existing shape, size and color of the natural teeth. Aim: To determine instrumentally to what extent different colorants change the color of temporary constructions. Materials and methods: Two materials for temporary restoration were tested &ndash; Protemp II and Protemp IV, of which a total of 100 test specimens, were fabricated. Under the equal storage conditions of room temperature and no direct access to sunlight, they were exposed to five 100-ml staining solutions: Coca-Cola, coffee (espresso), berry tea, orange juice and red wine in five separate containers. Measurements of color changes in the three areas of the tooth were performed using two spectrophotometric devices &ndash; Vita EasyShade and SpectroShade, at different time intervals &ndash; immediately before placement in the staining solution, at 1, 4, 7, and 14 days. Results: The results were analysed using the SPSS Statistical Processing Program (SPSS Inc., IBM SPSS Statistics) version 21.0. They were converted to a text file with the converter of the same program. In hypothesis testing, a standard value of p &le; 0.05 was chosen for the level of significance that rejects the null hypothesis. Conclusion: Based on this study, the strong colouring effect of coffee and red wine on these restorations was demonstrated. We can conclude that Protemp IV material showed better color stability compared to Protemp II.

Changes in surface characteristics of dental resin composites after polishing

2005 ◽  
Vol 16 (4) ◽  
pp. 347-353 ◽  
Author(s):  
Mi-Sook Choi ◽  
Yong-Keun Lee ◽  
Bum-Soon Lim ◽  
Sang-Hoon Rhee ◽  
Hyeong-Cheol Yang
Keyword(s):  
Surface Characteristics ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites

A multiscale topography analysis of ground stainless steel and titanium alloys

2007 ◽  
Vol 221 (9) ◽  
pp. 1407-1420 ◽  
Author(s):  
S Giljean ◽  
M Bigerelle ◽  
K Anselme
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Titanium Alloys ◽  
Roughness Parameter ◽  
Roughness Parameters ◽  
Observation Scale ◽  
316L Austenitic Stainless Steel ◽  
The Mean ◽  
Best Parameter

This study aims to perform a multiscale analysis of abraded surfaces of 316L austenitic stainless steel and titanium alloys (TiAl6V4) grinded at different paper grades. The authors propose to answer the following question: For a given distribution of silicon carbide grains of the paper, what is the best roughness parameter and at which scale must it be evaluated better to discriminate the effect of the mechanical properties of the materials? Paper grades from 80 to 4000 were used under identical pressure and erosion time. It can be concluded that the values of the amplitude roughness parameters depend on the observation scale. It is outlined that the abrasion process is very reproducible. A statistical analysis is then proposed, first, to define a classification of the relevance of the roughness parameters for each grain size distribution, and second, to determine at which scale the mechanical properties of the bulk are more influenced for all paper grades. Finally, at relevant scales, the Abbott amplitude parameters roughness kernel (RK) is the best parameter to discriminate the paper grade effect. The mean distance between asperities (SM) is the preferred method for determining the wear effect on materials and the linear mean normalizing autocorrelation (AMNLN) is the preferred method for determining the interaction between paper grade and materials.

scholarly journals The color stability of silorane- and methacrylate-based resin composites

2012 ◽  
Vol 31 (5) ◽  
pp. 879-884 ◽  
Author(s):  
Aromi KANG ◽  
Sung-Ae SON ◽  
Bock HUR ◽  
Young Hoon KWON ◽  
Jung Hoon RO ◽  
...  
Keyword(s):  
Color Stability ◽  
Resin Composites
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