747 results match your criteria roughness color


Alcohol and light-polymerizing glaze effect on the physical and mechanical properties of a bisacrylate composite resin before and after immersion in chlorhexidine gluconate.

J Prosthet Dent 2021 Apr 12. Epub 2021 Apr 12.

Professor, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil. Electronic address:

Statement Of Problem: The use of 0.12% chlorhexidine gluconate (CHX) may damage bisacrylate composite resin interim restorations, but whether they can be protected with an application of alcohol and/or the use of a glaze is unclear.

Purpose: The purpose of this in vitro study was to evaluate the effect of applying a 70% alcohol solution on the physical and mechanical properties of a bisacrylate composite resin, with and without the application of a light-polymerizing glaze subjected to 0. Read More

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Effects of different remineralizing agents on color stability and surface characteristics of the teeth following vital bleaching.

Microsc Res Tech 2021 Apr 14. Epub 2021 Apr 14.

Department of Restorative Dentistry, Faculty of Dentistry, Firat University, Elazig, Turkey.

The aim of the study was to investigate the effects of various remineralizing agents on the color stability and surface characteristics of the teeth after vital bleaching. The extracted 96 human incisors were used for the study. Initially, the samples were randomly divided into two groups and exposed to in-office and at-home bleaching agents. Read More

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Effects of mouthwashes on color stability and surface roughness of three different resin-based composites.

Niger J Clin Pract 2021 Apr;24(4):555-560

Department of Dentistry, Faculty of Dentistry, Selcuk University, Konya, Turkey.

Objective: The aim of this study is to evaluate the effects of different types of mouthwashes (Klorhexidin, Curasept ADS 205, Meridol, Listerine Cool Citrus) on the surface roughness and color changes of a microhybrid (Point 4), a bulk fill (SonicFill), and a nanohybrid (Nova Compo-N) resin-based composite (RBC).

Materials And Methods: Disk-shaped specimens were prepared from tested RBCs and divided into four subgroups which immersed in four different types of mouthwashes. The specimens were subjected to immersion cycles in the mouthwashes and artificial saliva (n = 8). Read More

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Biodegradable chitosan-poly(vinyl alcohol) intelligent films fortified with anthocyanins isolated from Clitoria ternatea and Carissa carandas for monitoring freshness of beverages.

Int J Biol Macromol 2021 Apr 8. Epub 2021 Apr 8.

Natural Product Research Center of Excellence, Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkla 90112, Thailand. Electronic address:

Biodegradable chitosan-poly(vinyl alcohol) films containing natural anthocyanin-rich extracts were prepared using solvent casting method and employed as intelligent indicators for monitoring beverages freshness. The surface and cross-sectional scanning electron micrograph indicated a compact structure for the intelligent films, whereas the atomic force micrograph indicated a 16.22 and 20. Read More

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Sesame Oil () as a New Challenge for Reinforcement of Conventional Glass Ionomer Cement, Could It Be?

Authors:
Neven S Aref

Int J Dent 2021 22;2021:5516517. Epub 2021 Mar 22.

Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.

Purpose: Despite the advantages of glass ionomer cement (GIC) including chemical bonding to the tooth structure and fluoride release, its low-grade mechanical properties make it a topic for research. Accordingly, this study was conducted to assess the ability of sesame oil as a natural bioactive additive to reinforce conventional glass ionomer cement.

Materials And Methods: Sesame oil was blended into the liquid component of the cement in ratios of 3 and 5 (v/v%). Read More

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Dimensional Accuracy of Dental Models for Three-Unit Prostheses Fabricated by Various 3D Printing Technologies.

Materials (Basel) 2021 Mar 22;14(6). Epub 2021 Mar 22.

Sense Dental Laboratory, 1104, Seoul Soop IT-Valley, 77, Seongsuil-ro, Seongdong-gu, Seoul 04790, Korea.

Previous studies on accuracy of three-dimensional (3D) printed model focused on full arch measurements at few points. The aim of this study was to examine the dimensional accuracy of 3D-printed models which were teeth-prepped for three-unit fixed prostheses, especially at margin and proximal contact areas. The prepped dental model was scanned with a desktop scanner. Read More

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Structure and Properties of ZrON Coatings Synthesized by Cathodic Arc Evaporation.

Materials (Basel) 2021 Mar 18;14(6). Epub 2021 Mar 18.

Research and Education Center "Materials", Don State Technical University, 344003 Rostov-on-Don, Russia.

The transition metal oxynitrides are a coating material with decorative features due to their adjustable color and good mechanical properties. The purpose of the research was to study the effect of the relative oxygen concentration O = O/(N + O) in particular on adhesion, but also on the color, structural and mechanical properties of ZrON coatings synthesized by cathodic arc evaporation on HS6-5-2 steel substrates. The surface morphology, phase and chemical composition and mechanical properties were determined using scanning electron microscopy, X-ray diffraction, wavelength dispersive X-ray spectroscopy, nanoindentation and scratch test. Read More

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Effects of charcoal-based whitening toothpastes on human enamel in terms of color, surface roughness, and microhardness: an in vitro study.

Clin Oral Investig 2021 Mar 27. Epub 2021 Mar 27.

Department of Restorative Dentistry, School of Dentistry, Hacettepe University, 06100 Sıhhıye, Ankara, Turkey.

Objective: Charcoal based oral care products have gained popularity in the last few years. The aim of this in vitro study was to compare the effects of different charcoal based whitening toothpastes on color, surface roughness and microhardness of human enamel.

Materials And Methods: Forty-eight specimens obtained from human permanent upper incisor teeth were randomly divided into 4 groups(n=12):Group-1:Colgate Total 12(CT); Group-2:Body Kingdom(BK); Group-3:Black is White(BW), Group-4:Colgate optic white(COW). Read More

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Effect of different home-bleaching techniques for a regular or an extended time on enamel properties.

Indian J Dent Res 2020 Nov-Dec;31(6):924-929

Prosthesis Department, School of Dentistry of State University of Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil.

Context: The side effects of bleaching products are still incompletely known.

Aims: This work aims to evaluate the effects of bleaching regimens on colour variation, microstructure, roughness, composition and nanohardness of human dental enamel until 8 weeks.

Settings And Design: : Twenty teeth were cross-sectioned to obtain eighty enamel fragments (50 × 50 mm) divided into four groups: CN (control Negative-artificial saliva), CP10 (10% carbamide peroxide), HP10 (10% hydrogen peroxide), and WS (whitening strips-10% hydrogen peroxide). Read More

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Ultra-high-frequency ultrasound and machine learning approaches for the differential diagnosis of melanocytic lesions.

Exp Dermatol 2021 Mar 19. Epub 2021 Mar 19.

Department of Dermatology, University of Pisa, Pisa, Italy.

Malignant melanoma (MM) is one of the most dangerous skin cancers. The aim of this study was to present a potential new method for the differential diagnosis of MM from melanocytic naevi (MN). We examined 20 MM and 19 MN with a new ultra-high-frequency ultrasound (UHFUS) equipped with a 70 MHz linear probe. Read More

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Comparison of surface roughness and color stainability of 3-dimensionally printed interim prosthodontic material with conventionally fabricated and CAD-CAM milled materials.

J Prosthet Dent 2021 Mar 11. Epub 2021 Mar 11.

Professor, Private practice, Istanbul, Turkey.

Statement Of Problem: Studies on the surface roughness and color stainability of interim prostheses produced with 3-dimensional-printing technology are lacking.

Purpose: The purpose of this in vitro study was to investigate the effect of different surface treatments on the surface roughness and stainability of 3-dimensionally printed, computer-aided design and computer-aided manufacturing (CAD-CAM) milled and conventional interim materials.

Material And Methods: A total of 320 specimens were fabricated from autopolymerizing polymethyl methacrylate, bis-acryl composite resin, CAD-CAM polymethyl methacrylate resin (milled), and 3-dimensionally printed composite resin (printed) (n=80). Read More

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Impact of the film-forming dispersion pH on the properties of yeast biomass films.

J Sci Food Agric 2021 Mar 11. Epub 2021 Mar 11.

Laboratorio de Obtención, Modificación, Caracterización y Evaluación de Materiales (LOMCEM), Universidad Nacional de Quilmes, Roque Sáenz Peña 352, Bernal, Provincia de Buenos Aires, 1876, Argentina.

Background: Yeast biomass, mainly composed of proteins and polysaccharides (mannans and β-glucans), has been proposed to develop films. pH can affect the solubility of polysaccharides, the structure of the cell wall, and the interactions between proteins. Considering the potential impact of these effects, the pH of yeast film-forming dispersions was studied from 4 to 11. Read More

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Multifunctional superhydrophobic surfaces.

Adv Colloid Interface Sci 2021 Apr 1;290:102397. Epub 2021 Mar 1.

Department of Chemistry, University of Qom, Qom, Iran. Electronic address:

Surface wetting has a significant influence on the performance and applications of the materials. The superhydrophobic surfaces have water repellency due to low surface energy chemistry and micro/nanostructure roughness. The amazing applications of superhydrophobic surfaces (SHSs) lead to increase attention to superhydrophobicity in recent decades. Read More

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Development and evaluation of a color-image-based visual roughness measurement method with illumination robustness.

J Opt Soc Am A Opt Image Sci Vis 2021 Mar;38(3):369-377

At present, the application of machine vision methods for roughness measurement in production sites is limited by its adaptability to illumination variations during the measurement. In this study, a machine vision method for roughness measurement with robustness to illumination is proposed so as to explore the functions of its color image indices in improving the mathematical expression of the vector of three primary colors. Besides, virtual images of different-roughness surfaces were analyzed, the effects of the samples' surface texture orientations on measurement indices were discussed, and the singular value ratio was derived as an index for evaluating roughness. Read More

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Effect of chemical aging on color stability and surface properties of stained all-ceramic restorations.

J Esthet Restor Dent 2021 Mar 5. Epub 2021 Mar 5.

Department of Biomaterials, Faculty of Dentistry, Cairo University, Cairo, Egypt.

Objectives: To study the effect of artificial aging on color stability, translucency, and surface roughness of stained all-ceramic restorations.

Materials And Methods: Disc-shaped specimens were fabricated from six different all-ceramic materials: two glass ceramics (Vita Mark II and Empress CAD), two lithium disilicate based ceramics (e.max and Suprinity), and two zirconia-based materials (ZirCAD LT and ZirCAD MT Multi). Read More

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Disinfection protocols during COVID-19 pandemic and their effects on prosthetic surfaces: a systematic review.

Int J Prosthodont 2021 Mar 3. Epub 2021 Mar 3.

Purpose: To describe the possible adverse effects of sodium hypochlorite (NaOCl) solutions, high-concentration alcohol solutions, and povidone-iodine products, which are indicated for disinfection of inanimate surfaces against human coronavirus of the severe acute respiratory syndrome (SARS-CoV), on prosthesis materials, including zirconia, lithium disilicate, and acrylic resin.

Materials And Methods: A systematic literature research for articles published between January 2010 and February 2020 was conducted in Scopus, PubMed/Medline, Web of Science, Embase, and Science Direct using a combination of the following MeSH/Emtree terms and keywords: sodium hypochlorite, alcohol, ethanol, povidone-iodine, dental ceramic, zirconia, lithium disilicate, and acrylic resin.

Results: A total of 538 studies were identified in the search during initial screening, of which 44 were subject to full-text evaluation, and 24 fulfilled the inclusion criteria. Read More

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Feasibility of Machine Learning Algorithms for Predicting the Deformation of Anodic Titanium Films by Modulating Anodization Processes.

Materials (Basel) 2021 Feb 26;14(5). Epub 2021 Feb 26.

Department of Advanced Materials Engineering, Dong-eui University, 176 Eomgwang-ro, Busanjin-gu, Busan 47340, Korea.

This study aims to demonstrate the feasibility of applying eight machine learning algorithms to predict the classification of the surface characteristics of titanium oxide () nanostructures with different anodization processes. We produced a total of 100 samples, and we assessed changes in nanostructures' thicknesses by performing anodization. We successfully grew films with different thicknesses by one-step anodization in ethylene glycol containing and at applied voltage differences ranging from 10 V to 100 V at various anodization durations. Read More

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February 2021

Food solutions and cigarette smoke-dependent changes in color and surface texture of CAD/CAM resin composites - an in vitro study.

Int J Prosthodont 2021 Feb 23. Epub 2021 Feb 23.

Purpose: To investigate the discoloration and surface properties of four CAD/CAM composite resins provoked by a variety of food solutions and cigarette smoke.

Materials And Methods: A total of 74 specimens (N = 370) were prepared per material (Brilliant Crios [Coltene], CeraSmart [GC], Lava Ultimate [3M Espe], Shofu Block HC [Shofu], and SonicFill 2 [Kerr]). Discoloration (ΔE) was investigated with a spectrophotometer. Read More

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February 2021

Comparative evaluation of surface roughness and color stability of nanohybrid composite resin after periodic exposure to tea, coffee, and Coca-cola - An profilometric and image analysis study.

J Conserv Dent 2020 Jul-Aug;23(4):395-401. Epub 2021 Jan 16.

Centre for Health Care Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, West Bengal, India.

Aim: The aim of this study is to evaluate the surface roughness and color stability of a nanohybrid composite resin after exposure to tea, coffee, Coca-cola, and artificial saliva on the 7, 14, and 28 day.

Materials And Methods: Forty specimens of nanohybrid composite resin discs of dimension 6 mm × 2 mm were fabricated and were randomly divided into four equal groups based on beverages (Group 1: control group - artificial saliva, Group 2: Tea, Group 3: Coffee, and Group 4 : Coca-cola). Baseline readings of surface roughness (Ra) and color change (ΔE) were obtained by profilometer and digital image analysis technique in CIE l*a*b scale followed by the readings (ΔE) taken on the 7, 14, and 28 day of exposure to respective beverages. Read More

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January 2021

In vitro efficacy of commercial and experimental proteolytic enzyme-based whitening dentifrices on enamel whitening and superficial roughness.

J Esthet Restor Dent 2020 Dec 5. Epub 2020 Dec 5.

Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.

Objective: To evaluate the whiteness index (W ) and surface roughness (Ra) of bovine enamel after simulated tooth brushing with different commercial and experimental whitening dentifrices.

Materials And Methods: Cylindrical enamel bovine specimens were acid etched, stained, and divided in nine groups (n = 8): Colgate® Optic White®, Crest® Baking Soda and Peroxide, Arm and Hammer® Advanced White™ Extreme Whitening, Rembrandt® Deeply White® + Peroxide, Close up® White Attraction Natural Glow, Hinode Prowhite, and experimental dentifrice containing papain (PP), bromelain (PB), or papain and bromelain (PPB). Ra and W were obtained initially and after 600, 1200, and 3,600 cycles of simulated tooth brushing. Read More

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December 2020

Physicomechanical, optical, and antifungal properties of polymethyl methacrylate modified with metal methacrylate monomers.

J Prosthet Dent 2021 Apr 11;125(4):706.e1-706.e6. Epub 2021 Feb 11.

Associate professor, Graduate Program in Dentistry, Pelotas Dental School, Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil. Electronic address:

Statement Of Problem: The high recurrence rates of denture stomatitis may be associated with the resistance of biofilms to therapeutics. Therefore, methods that provide biomaterials with antifungal properties are an attractive solution to improving microbial control.

Purpose: The purpose of this in vitro study was to modify conventional polymethyl methacrylate (PMMA) through the incorporation of metal methacrylate monomers and to evaluate the physicomechanical and optical properties and antifungal activity of the modified materials. Read More

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Electrocatalytic removal of fluroquinolones from simulated pharmaceutical effluent: Chemometric analysis, chemical blueprint of electrodes and generated sludge.

Environ Res 2021 Apr 9;195:110844. Epub 2021 Feb 9.

Centre for Research, Department of Biotechnology, Kamaraj College of Engineering & Technology, Madurai, Tamilnadu, India. Electronic address:

Electrocatalytic removal of fluroquinolones from simulated pharmaceutical effluent is studied in this work. The effects of parameters like NaCl concentration, pH and initial concentration of Ofloxacin were studied. The synergistic effect of HO on the degradation of Ofloxacin paves the way to move towards radical based chemistry. Read More

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Surface properties and the perception of color.

J Vis 2021 Feb;21(2)

School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia.

We examined whether perception of color saturation and lightness depends on the three-dimensional (3D) shape and surface gloss of surfaces rendered to have different hues. In Experiment 1, we parametrically varied specular roughness of predominantly planar surfaces with different mesoscopic relief heights. The orientation of surfaces was varied relative to the light source and observer. Read More

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February 2021

Molybdenum Oxide Thin Films Grown on Flexible ITO-Coated PET Substrates.

Materials (Basel) 2021 Feb 9;14(4). Epub 2021 Feb 9.

Centre for Research in Ceramics and Composite Materials (CICECO), Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal.

Molybdenum oxide thin films were deposited on stiff and flexible substrates by reactive DC magnetron sputtering. Two sets of samples were prepared. The first with different O/Ar flow rate ratios and the second, fixing the oxygen content, with different time of deposition. Read More

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February 2021

Effect of a Surface Sealant Agent on the Color Stability and Surface Roughness of Polymethyl Methacrylate and Nylon Denture Base Materials.

Int J Prosthodont 2021 Jan-Feb;34(1):70-78

Purpose: To evaluate the effect of a surface sealant agent on the color stability and surface roughness (Ra) of two denture base materials: polymethyl methacrylate (PMMA) and nylon.

Materials And Methods: A total of 96 disk-shaped specimens (10 × 2 mm) were fabricated from heat-cured PMMA and nylon denture base materials (n = 48/material). Each of the color stability and Ra tests were performed on half of the samples in each material group (n = 24), and these subgroups were then subdivided according to the surface treatment applied: 12 specimens were conventionally polished, serving as the control group, and 12 specimens received a sealant on the surface in addition to the surface polishing. Read More

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February 2021

Effect of Particle Size of Nano-Oxides on Color Stability and Mechanical Properties of Maxillofacial Silicone Elastomers: An In Vitro Study.

Int J Prosthodont 2021 Jan-Feb;34(1):54-60

Purpose: To evaluate the physical and mechanical properties of maxillofacial silicone elastomers following the incorporation of a specific particle size and concentration of nano-titanium dioxide (TiO) and nano-zinc oxide (ZnO).

Materials And Methods: Nano-TiO and nano-ZnO of 20-nm and 40-nm particle sizes and in 1% and 2% concentrations were chosen. Silicone elastomer samples were prepared according to the manufacturer's recommendations. Read More

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February 2021

Effect of Post-bleaching Surface Microroughness with Whiteness HP Blue vs Whiteness HP Maxx on Different Locations of Bovine Enamel.

J Contemp Dent Pract 2020 Sep 1;21(9):1002-1007. Epub 2020 Sep 1.

Academic Department, School of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru; Postgraduate Department, Faculty of Health Sciences, Universidad Científica del Sur, Lima, Peru, Phone: +51 1 214-2500, e-mail:

Aim: To compare the effect after bleaching with 35% hydrogen peroxide with and without calcium gluconate on surface microroughness in an study on the bovine enamel.

Materials And Methods: The study had an experimental design. The following groups were formed: group I: MV (mesiovestibular) enamel, group II: V (vestibular) enamel, and group III: DV (dystovestibular) enamel, undergoing treatment with Whiteness HP Blue (HO at 35% with calcium gluconate), Whiteness HP Maxx: HO at 35% (without calcium gluconate), and physiological serum. Read More

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September 2020

Advanced Surface Color Quality Assessment in Paper-Based Full-Color 3D Printing.

Materials (Basel) 2021 Feb 4;14(4). Epub 2021 Feb 4.

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.

Color 3D printing allows for 3D-printed parts to represent 3D objects more realistically, but its surface color quality evaluation lacks comprehensive objective verification considering printing materials. In this study, a unique test model was designed and printed using eco-friendly and vivid paper-based full-color 3D printing as an example. By measuring the chromaticity, roughness, glossiness, and whiteness properties of 3D-printed surfaces and by acquiring images of their main viewing surfaces, this work skillfully explores the correlation between the color representation of a paper-based 3D-printed coloring layer and its attached underneath blank layer. Read More

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February 2021

In vitro evaluation of surface roughness, color stability, and color masking of provisional restoration materials for veneers and crowns.

Int J Comput Dent 2020 ;23(4):343-350

Aim: To evaluate surface roughness (SR), color stability (CS), and color masking as assessed through the relative translucency parameter (RTP) of different provisional restoration materials before and after water thermocycling (TC).

Materials And Methods: Four different provisional materialas were selected: acrylic resin, bis-acryl resin, polymethyl methacrylate (PMMA) CAD/CAM blocks, and 3D-printed provisional resin. Samples of 0. Read More

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January 2021

Age-related dental phenotypes and tooth characteristics of FAM83H-associated hypocalcified amelogenesis imperfecta.

Oral Dis 2021 Jan 24. Epub 2021 Jan 24.

Center of Excellence for Medical Genomics, Medical Genomics Cluster, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.

Objectives: Autosomal-dominant hypocalcified amelogenesis imperfecta (ADHCAI) shows phenotypic heterogeneity. Our aim was to characterise the ADHCAI phenotypes, tooth properties and genotypes.

Methods: Three unrelated ADHCAI probands and seven additional affected members of the three families were recruited. Read More

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January 2021