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nano silver fluoride

Chen Zhang, Youjun Fan, Huayang Li, Yayuan Li, Lei Zhang, Shubo Cao, Shuangyang Kuang, Yongbin Zhao, Aihua Chen, Guang Zhu, Zhong Lin Wang
A fully rollable nanocomposite-based nanogenerator (NCG) is developed by integrating a lead-free piezoelectric hybrid layer with a type of nanofiber-supported silver nanowire (AgNW) network electrodes. The thin-film nanocomposite is composed of electroactive polyvinylidene fluoride (PVDF) polymer matrix and compositionally modified potassium sodium niobate-based nanoparticles (NPs) with a high piezoelectric coefficient (d33) of 53 pm/V, which is revealed by the piezoresponse force microscopy measurements. Under periodical agitation at a compressive force of 50 N and 1 Hz, the NCG can steadily render high electric output up to an open-circuit voltage of 18 V and a short-circuit current of 2...
April 27, 2018: ACS Nano
Ali Nozari, Shabnam Ajami, Azade Rafiei, Elmira Niazi
Introduction: Dental caries is still prevailing worldwide, although different anti caries products have been introduced. Each remineralizing agent has its own shortcomings. Therefore, looking for new agents to have benefits of previous ones with lesser side effects is worthwhile. Aim: To determine the remineralization ability of NaF varnish, nano-Hydroxyapatite Serum (n-HAP) and Nano Silver Fluoride (NSF) on enamel of primary anterior teeth. Materials and Methods: Incipient caries were induced in primary sound anterior teeth by storing each specimen in demineralization solution for 72 hours...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
Priscila L L Freire, Allan J R Albuquerque, Fabio C Sampaio, André Galembeck, Miguel A P Flores, Thayza C M Stamford, Aronita Rosenblatt
The purpose of this study was to evaluate the antimicrobial properties of a new formulation containing silver nanoparticles, named Nano Silver Fluoride (NSF), to inhibit Streptococcus mutans biofilm formation on children's dental enamel. The variations in dental biofilm pH and in the Simplified-Oral-Hygiene-Index (OHI-S) also were evaluated after the treatment with NSF. This was a randomized, double-blind, crossover and prospective pilot clinical trial study in which 12 schoolchildren, aged between 7-8 years, had their dental enamel treated with two solutions: S1 - Nano Silver Fluoride and S2 - negative control (saline solution), in different experimental moments...
July 2017: Brazilian Dental Journal
Huyan Shi, Lixin Xue, Ailin Gao, Qingbo Zhou
Dual layer polyvinylidene fluoride (PVDF), antibacterial, hollow fiber, ultra-filtration composite membranes with antibacterial particles (silver (Ag) nano-particles loaded zeolite (Z-Ag)) in the outer layer were prepared with high water flux and desired pore sizes. The amounts of Ag(+) released from the composite membranes, freshly made and stored in water and salt solution, were measured. The result indicated that dual layer PVDF antibacterial hollow fiber containing Z-Ag (M-1-Ag) still possessed the ability of continuous release of Ag(+) even after exposure to water with high ionic content, showing a longer term resistance to bacterial adhesion and antibacterial activity than membrane doped with Z-Ag(+) (M-1)...
2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Sherry Shiqian Gao, Shinan Zhang, May Lei Mei, Edward Chin-Man Lo, Chun-Hung Chu
BACKGROUND: As a low-cost and easily operated treatment, the use of professionally applied topical fluoride was approved for preventing dental caries and remineralising early enamel caries or white spot lesions. It is also used to arrest dentine caries. The aim of this study is to investigate the clinical efficacy of professional fluoride therapy in remineralising and arresting caries in children. METHOD: A systematic search of publications from 1948 to 2014 was conducted using four databases: PubMed, Cochrane Library, ISI Web of Science and Embase...
February 1, 2016: BMC Oral Health
Jacky Burns, Kate Hollands
DESIGN: Randomised controlled trial, double blind, in a community setting. INTERVENTION: School children with active caries in primary teeth and no pulpal exposure, fistula or decay in permanent teeth were chosen. Caries and unsupported enamel were left as found and cotton wool rolls were used for isolation. Two drops of NSF or one drop of water were applied to the tooth with a microbrush for two minutes, once in a 12-month period. OUTCOME MEASURE: At one week, five months and 12 months the presence of active caries, as classified using International Caries Detection and Assessment System (ICDAS II) criteria, was measured...
March 2015: Evidence-based Dentistry
Valdeci Elias dos Santos, Arnoldo Vasconcelos Filho, Andrea Gadelha Ribeiro Targino, Miguel Angel Pelagio Flores, André Galembeck, Arnaldo França Caldas, Aronita Rosenblatt
BACKGROUND: Untreated dental caries in children remains a public health challenge in poor communities. OBJECTIVES: This prospective controlled clinical trial investigated the effectiveness of a new anti-caries agent, Nano Silver Fluoride (NSF), applied once a year to arrest caries in children. METHODS: One hundred thirty decayed primary teeth were randomly divided into two groups: NSF as the experimental agent and water as the control group...
August 2014: Journal of Dentistry
Andréa Gadelha Ribeiro Targino, Miguel Angel Pelagio Flores, Valdeci Elias dos Santos Junior, Fabiana de Godoy Bené Bezerra, Hilzeth de Luna Freire, André Galembeck, Aronita Rosenblatt
The aim of this work is to evaluate the antimicrobial and cytotoxic activity of a formulation containing silver nanoparticles and chitosan, provisionally called nano silver fluoride (NSF), against Streptococcus mutans in comparison to chlorhexidine and silver diamine fluoride (SDF). The product was characterised by transmission electron microscopy and UV-Vis absorption spectroscopy. The minimum inhibition concentration (MIC) was evaluated by the spectrophotometric microdilution method and turbidity. The minimum bactericide concentration (MBC) was evaluated in brain heart infusion plates, and cytotoxicity was evaluated by haemolytic activity...
August 2014: Journal of Materials Science. Materials in Medicine
Xiong Li, Ce Wang, Yin Yang, Xuefen Wang, Meifang Zhu, Benjamin S Hsiao
A new type of dual-biomimetic hierarchically rough polystyrene (PS) superhydrophobic micro/nano-fibrous membrane was fabricated via a one-step electrospinning technique at various polymer concentrations from 15 to 30 wt %. The obtained micro/nano-fibers exhibited a nanopapillose, nanoporous, and microgrooved surface morphology that originated from mimicking the micro/nanoscale hierarchical structures of lotus leaf and silver ragwort leaf, respectively. Superhydrophobicity and high porosity of such resultant electrospun nanofibrous membranes make them attractive candidates for membrane distillation (MD) application with low energy water recovery...
February 26, 2014: ACS Applied Materials & Interfaces
Suibin Luo, Shuhui Yu, Rong Sun, Ching-Ping Wong
Nano Ag-deposited BaTiO3 (BT-Ag) hybrid particles usable as fillers for flexible polymeric composites to obtain high dielectric constant, low conductivity, and low dielectric loss were developed. BT-Ag hybrid particles were synthesized via a seed-mediated growing process by a redox reaction between silver nitrate and ethylene glycol. Nano Ag particles with a size less than 20 nm were discretely grown on the surface of the 100 nm BaTiO3. The similar lattice spacing of the (1 1 1) planes of BT and Ag led to the hetero-epitaxial growth of Ag on the BT surface...
January 8, 2014: ACS Applied Materials & Interfaces
May L Mei, Leticia Ito, C H Chu, Edward C M Lo, C F Zhang
To evaluate the preventive effect of Er:YAG laser (EYL) irradiation followed by silver diamine fluoride (SDF) application on dentine with cariogenic biofilm challenge. Twenty-four dentine slices were prepared from extracted sound human third molars. Each slice was cut into four parts for SDF application, followed by EYL irradiation (group SL), SDF application (group S), EYL irradiation (group L) and water (group W). The specimens were subjected to cariogenic biofilm challenge for 12 h, followed by immersion in a buffered remineralising solution containing calcium chloride and sodium hypophosphate for 12 h at 37 °C...
November 2014: Lasers in Medical Science
Debashis Chanda, Kazuki Shigeta, Sidhartha Gupta, Tyler Cain, Andrew Carlson, Agustin Mihi, Alfred J Baca, Gregory R Bogart, Paul Braun, John A Rogers
Negative-index metamaterials (NIMs) are engineered structures with optical properties that cannot be obtained in naturally occurring materials. Recent work has demonstrated that focused ion beam and layer-by-layer electron-beam lithography can be used to pattern the necessary nanoscale features over small areas (hundreds of µm(2)) for metamaterials with three-dimensional layouts and interesting characteristics, including negative-index behaviour in the optical regime. A key challenge is in the fabrication of such three-dimensional NIMs with sizes and at throughputs necessary for many realistic applications (including lenses, resonators and other photonic components)...
July 2011: Nature Nanotechnology
Muthuswamy Sathishkumar, Krishnamurthy Sneha, Yeoung-Sang Yun
The present study reports the synthesis of silver (Ag) nanoparticles from silver precursor using plant biomaterials, Curcuma longa tuber powder and extract. Water-soluble organics present in the plant materials were mainly responsible for the reduction of silver ions to nano-sized silver particles. pH played a major role in size control of the particles. Silver nanoparticle synthesis was higher in tuber extract compared to powder, which was attributed to the large and easy availability of the reducing agents in the extract...
October 2010: Bioresource Technology
Y Hosoya, S Ando, K Yamaguchi, S Oooka, M Miyazaki, F R Tay
OBJECTIVE: Limited information is available on the physical properties and ultrastructure of resin-dentin interfaces created in primary teeth. The interfacial quality of sound and caries-affected primary tooth dentin bonded with an antibacterial fluoride-releasing self-etch adhesive was examined in the present study. METHODS: Primary molars were bonded with Clearfil Protect Bond (Kuraray Medical). A nano-indentation tester was employed for creating indentations vertically across resin-dentin interfaces of the bonded sound and caries-affected primary dentin for determination of hardness (H) and Young's modulus (Y)...
May 2010: Journal of Dentistry
Sandeep Kumar, Arvind M Kayastha
Various inhibitors were tested for their inhibitory effects on soybean urease. The K(i) values for boric acid, 4-bromophenylboronic acid, butylboronic acid, and phenylboronic acid were 0.20 +/- 0.05 mM, 0.22 +/- 0.04 mM, 1.50 +/- 0.10 mM, and 2.00 +/- 0.11 mM, respectively. The inhibition was competitive type with boric acid and boronic acids. Heavy metal ions including Ag(+), Hg(2+), and Cu(2+) showed strong inhibition on soybean urease, with the silver ion being a potent inhibitor (IC(50) = 2.3 x 10(-8) mM)...
October 2010: Journal of Enzyme Inhibition and Medicinal Chemistry
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