Surface Texture and Optical Properties of Self-Adhering Composite Materials after Toothbrush Abrasion

ABSTRACT This study evaluated the surface texture and optical properties of two self-adhering composites and a nanofilled composite before and after toothbrush abrasion. Vertise Flow (Kerr), Fusio Liquid (Pentron Clinical) and Filtek Z350 XT (3M ESPE) composites were divided into 3 groups (n = 6). Disks of 12 mm diameter and 2 mm thick were made. All materials were light-cured with a LED light source for 40 seconds. Analyses of surface roughness, gloss retention and color stability were performed 24 hours after light curing and after 20,000 brushing cycles. Data were analyzed with analysis of variance (ANOVA) and Tukey's test (α = 5%). Results Tukey's test ascertained that toothbrush abrasion resulted in rougher and matte surfaces for all composites tested. Filtek Z350 presented better gloss retention after abrasion. On surface roughness evaluation, there was no statistical difference between Fusio Liquid Dentin and Filtek Z350 resins (p > 0.05). Vertise Flow resin showed better color stability (ΔE), than the other two materials. Conclusion Nanofilled material presented better gloss retention but it did not produce the best results in aspects related to surface roughness and color stability compared to self-adhering composites. Clinical significance A simulation of degradation process by using toothbrush abrasion produced a rougher and matte surface in all composites tested. The surface texture was not only related to filler's amount present in materials, but also with the organic matrix composition of them. The results suggested that the constant development of new materials, seeking for a technical simplification, seems an innovative attraction for dentist's clinical routine, even though larger studies are necessary to promote to everyone a better understanding and improvement of action and effectiveness of this new class of materials. How to cite this article Malavasi CV, Macedo EM, da Costa Souza K, Rego GF, Schneider LFJ, Cavalcante LM. Surface Texture and Optical Properties of Self-Adhering Composite Materials after Toothbrush Abrasion. J Contemp Dent Pract 2015;16(10):775-782.

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Optical Properties and Color Stability of Dental PEEK Related to Artificial Ageing and Staining

Polymers ◽

10.3390/polym13234102 ◽

2021 ◽

Vol 13 (23) ◽

pp. 4102

Author(s):

Liliana Porojan ◽

Flavia Roxana Toma ◽

Roxana Diana Vasiliu ◽

Florin Topală-Ionel ◽

Sorin Daniel Porojan ◽

...

Keyword(s):

Surface Roughness ◽

Optical Properties ◽

Color Stability ◽

Favorable Effect ◽

Artificial Ageing ◽

Distilled Water ◽

Surface Processing ◽

Extrinsic Factors ◽

Natural Teeth ◽

The Mean

Considering that the processes of PEEK discoloration caused by either intrinsic or extrinsic factors require elucidation, the aim of this study was to investigate the long-term effect of the combined action of ageing and immersing solutions on the optical properties and color stability of PEEK material, related to surface processing (polishing or glazing). (2) Methods: This study aims to determine the influence of different ageing and staining protocols on optical properties, color changes, and surface roughness of a reinforced PEEK material (bioHPP, Bredent, Senden, Germany). For ageing, specimens were submitted to 5000 cycles in a 55 °C bath and a 5 °C bath filled with distilled water. For staining, thermal cycling was performed in a hot coffee bath (55 °C) and a bath filled with distilled water (37 °C) and in a cold juice bath (5 °C) and a bath filled with distilled water (37 °C). Translucency (TP) and opalescence (OP) parameters were determined, the total color change value (ΔΕ*) was calculated, specimens’ surface roughness was analyzed, and statistical analyses were performed. (3) Results: The mean TP values of the studied samples were in the interval of 1.25–3.60, which is lower than those reported for natural teeth or other aesthetic restoration materials. The OP values of PEEK were registered in the range of 0.27–0.75, being also lower than those of natural teeth or other aesthetic restoration materials. OP has a very strong positive relationship with TP. The mean registered Ra values for all subgroups were below 0.13 µm. Artificial ageing and staining in hot coffee proved to increase the roughness values. (4) Conclusions: The glazing of PEEK has a favorable effect on surface roughness and opalescence, irrespective of the artificial ageing or staining protocols. Artificial ageing damages the color stability and roughness of PEEK, regardless of surface processing, and decreases the translucency and opalescence of glazed surfaces. Immersion in hot coffee leads to perceivable discolorations.

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Effect of the Polishing Procedures on Color Stability and Surface Roughness of Composite Resins

ISRN Dentistry ◽

10.5402/2011/617672 ◽

2011 ◽

Vol 2011 ◽

pp. 1-6 ◽

Cited By ~ 11

Author(s):

Vera Lucia Schmitt ◽

Regina Maria Puppin-Rontani ◽

Fabiana Scarparo Naufel ◽

Flávia Pardo Salata Nahsan ◽

Mário Alexandre Coelho Sinhoreti ◽

...

Keyword(s):

Surface Roughness ◽

Surface Texture ◽

Color Stability ◽

Composite Resins ◽

Lower Degree ◽

Color Measurement ◽

Final Surface ◽

Polishing Procedures ◽

Initial Color ◽

Multiple Step

Objectives. To evaluate the polishing procedures effect on color stability and surface roughness of composite resins. Methods. Specimens were distributed into 6 groups: G1: Filtek Supreme XT + PoGo; G2: Filtek Supreme XT + Sof-Lex; G3: Filtek Supreme XT + no polishing; G4: Amelogen + PoGo; G5: Amelogen + Sof-Lex.; G6: Amelogen + no polishing. Initial color values were evaluated using the CIELab scale. After polishing, surface roughness was evaluated and the specimens were stored in coffee solution at 37∘C for 7 days. The final color measurement and roughness were determined. Results. Sof-Lex resulted in lower staining. Amelogen showed the highest roughness values than Filtek Supreme on baseline and final evaluations regardless of the polishing technique. Filtek Supreme polished with PoGo showed the lowest roughness values. All groups presented discoloration after storage in coffee solution, regardless of the polishing technique. Conclusion. Multiple-step polishing technique provided lower degree of discoloration for both composite resins. The final surface texture is material and technique dependent.

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Surface roughness and substrate induced symmetry-breaking: influence on the plasmonic properties of aluminum nanostructure arrays

Nanoscale ◽

10.1039/d0nr06305c ◽

2020 ◽

Author(s):

Feifei ZHANG ◽

Jérôme Plain ◽

Davy Gerard ◽

Jérôme Martin

Keyword(s):

Surface Roughness ◽

Optical Properties ◽

Symmetry Breaking ◽

Surface Topography ◽

Metallic Nanoparticles ◽

Far Field ◽

Al Nanoparticles ◽

Nanostructure Arrays

The surface topography is known to play an important role on the near- and far- field optical properties of metallic nanoparticles. In particular, aluminum (Al) nanoparticles are commonly fabricated through...

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Preparation and enhanced nonlinear optical properties of Bi2S3/RGO composite materials

Optical Materials ◽

10.1016/j.optmat.2019.01.010 ◽

2019 ◽

Vol 89 ◽

pp. 112-117 ◽

Cited By ~ 2

Author(s):

Gangshuo Liu ◽

Shuxi Dai ◽

Fenglin Cao ◽

Baohua Zhu ◽

Peng Li ◽

...

Keyword(s):

Optical Properties ◽

Composite Materials ◽

Nonlinear Optical ◽

Nonlinear Optical Properties

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Influence of Relative Displacement on Surface Roughness in Longitudinal Turning of X37CrMoV5-1 Steel

Materials ◽

10.3390/ma14051317 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1317

Author(s):

Michal Skrzyniarz ◽

Lukasz Nowakowski ◽

Edward Miko ◽

Krzysztof Borkowski

Keyword(s):

Surface Roughness ◽

Standard Deviation ◽

Surface Texture ◽

Roughness Parameter ◽

Relative Displacement ◽

Edge Radius ◽

Shaping Process ◽

Feed Value ◽

Longitudinal Turning ◽

Final Effect

The shaping process of surface texture is complicated and depends on many factors and phenomena accompanying them. This article presents the author’s test stand for the measurement of relative displacements in a tool–workpiece system during longitudinal turning. The aim of this study was to determine the influence of edge radius on the relative displacement between the tool and workpiece. The cutting process was carried out with inserts with different edge radii for X37CrMoV5-1 steel. As a result of the research, vibration charts of the tool–workpiece system were obtained. In the range of feed 0.03–0.18 mm/rev, the values of the standard deviation of relative displacements in the x-axis were obtained in the range of 0.36–0.78 μm for the insert with an edge radius of rn = 48.8 μm. As a result of the work, it was determined that for the feed value of 0.12 mm/rev for all inserts, the relative displacements are the smallest. As the final effect, the formula for forecasting the Ra roughness parameter was presented.

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