keyword
MENU ▼
Read by QxMD icon Read
search

Hydrogen peroxide gel

keyword
https://www.readbyqxmd.com/read/29786702/color-stability-psychosocial-impact-and-effect-on-self-perception-of-esthetics-of-tooth-whitening-using-low-concentration-6-hydrogen-peroxide
#1
Pablo Angel, Cristian Bersezio, Juan Estay, Andrea Werner, Hector Retamal, Constanza Araya, Javier Martin, Eduardo Fernández
OBJECTIVE: The aim of this study was to assess the bleaching efficacy and impact on psychosocial and esthetics self-perception of a low-concentration (6%) hydrogen peroxide (H2O2) gel compared with a conventional (37.5%) H2O2 gel when used as an in-office treatment. METHOD AND MATERIALS: In total, 35 participants received two sessions of three 12-minute applications of treatment with 37.5% H2O2 on one side of the mouth and 6% H2O2 on the other. Color changes were measured objectively using total variation in color (ΔE) and subjectively using Vita Classical scale (ΔSGU)...
May 17, 2018: Quintessence International
https://www.readbyqxmd.com/read/29715662/antimicrobial-effect-of-different-peroxyacetic-acid-and-hydrogen-peroxide-formats-against-spores-of-clostridium-estertheticum
#2
John Mills, Kylie Marree Horváth, Gale Brightwell
"Blown pack" spoilage is primarily caused by Clostridium estertheticum. The primary source of contamination is probably pelts, faeces and soil during opening cuts and de-hiding. Peroxyacetic acid (POAA) based fogs are commonly included in an abattoir's routine cleaning process. Hydrogen peroxide (H2 O2 ) is a powerful oxidizing agent that penetrates microbe cell walls causing cell death. In this study, we compared the ability of H2 O2 and OXYSAN ZS (POAA containing 1-hydroxyethylidine-1,1-diphosphonic acid as a stabilizer) in different formats to inactivate C...
April 23, 2018: Meat Science
https://www.readbyqxmd.com/read/29696420/pre-operative-use-of-dexamethasone-does-not-reduce-incidence-or-intensity-of-bleaching-induced-tooth-sensitivity-a-triple-blind-parallel-design-randomized-clinical-trial
#3
Luiz Augusto da Costa Poubel, Cresus Vinicius Deppes de Gouvea, Fernanda Signorelli Calazans, Etyene Castro Dip, Wesley Veltri Alves, Stella Soares Marins, Roberta Barcelos, Marcos Oliveira Barceleiro
OBJECTIVES: This study evaluated the effect of the administration of pre-operative dexamethasone on tooth sensitivity stemming from in-office bleaching. MATERIALS AND METHODS: A triple-blind, parallel-design, randomized clinical trial was conducted on 70 volunteers who received dexamethasone or placebo capsules. The drugs were administered in a protocol of three daily 8-mg doses of the drug, starting 48 h before the in-office bleaching treatment. Two bleaching sessions with 37...
April 25, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29676980/effect-of-bleaching-gel-viscosity-on-tooth-whitening-efficacy-and-pulp-chamber-penetration-an-in-vitro-study
#4
S R Kwon, Fnu Pallavi, Y Shi, U Oyoyo, A Mohraz, Y Li
OBJECTIVES: Whitening efficacy has been related to hydrogen peroxide (HP) diffusion into tooth structure. However, little information is available relating rheological properties to whitening efficacy. The purpose was to evaluate the whitening efficacy and HP penetration level of a 10% HP gel at three different viscosities and to compare them to a strip delivery system. METHODS AND MATERIALS: Extracted molars (n=120) were randomly assigned into five groups (n=24/ group): NC_MED (negative control; median): medium viscosity gel without HP; LOW: 10% HP gel (low viscosity experimental gel, Ultradent Products Inc); MED: 10% HP gel (medium viscosity experimental gel, Ultradent); HIGH: 10% HP gel (high viscosity gel, Ultradent); and CWS: Crest 3D Whitestrips 1-Hour Express (Procter & Gamble)...
May 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29668740/evaluation-of-the-fusion-inhibitor-p3-peptide-as-a-potential-microbicide-to-prevent-hiv-transmission-in-women
#5
Inês Bártolo, Ana Rita Diniz, Pedro Borrego, João Pedro Ferreira, Maria Rosário Bronze, Helena Barroso, Rui Pinto, Carlos Cardoso, João F Pinto, Rafael Ceña Diaz, Pilar Garcia Broncano, Maria Angel Muñoz-Fernández, Nuno Taveira
Microbicides are an important strategy for preventing the sexual transmission of HIV but, so far, the most advanced tenofovir-based microbicides have had modest efficacy. This has been related to adherence problems and high prevalence of tenofovir-resistant HIV-1 strains. P3 is a new peptide with potent activity against HIV that may be a good microbicide candidate. In this work P3 was formulated in a gel of hydroxyethyl cellulose and its activity, stability and safety profile in Balb/c mice were evaluated. HIV infection was fully blocked by a 1...
2018: PloS One
https://www.readbyqxmd.com/read/29665386/enzymatically-crosslinked-and-mechanically-tunable-silk-fibroin-pullulan-hydrogels-for-mesenchymal-stem-cells-delivery
#6
Tao Li, Xiongbo Song, Changmei Weng, Xin Wang, Jiangyi Wu, Li Sun, Xiaoyuan Gong, Wei-Nan Zeng, Liu Yang, Cheng Chen
Hydrogels with good biocompatibility, proper degradation rates, and tissue-matched elasticity are widely used in tissue engineering, regenerative medicine, and drug delivery. In this study, enzymatically crosslinked biocompatible hydrogels were successfully developed using silk fibroin (SF) and pullulan (PL) under physiological conditions in the presence of both horseradish peroxidase (HRP) and hydrogen peroxide (H2 O2 ). A series of properties of the hydrogels including gelation time, equilibrium swelling, enzyme degradation, morphology, rheological property, and compression modulus of SF/PL hydrogels were studied by varying the concentration of PL...
April 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29665335/x-ray-diffraction-and-density-functional-theory-provide-insight-into-vanadate-binding-to-homohexameric-bromoperoxidase-ii-and-the-mechanism-of-bromide-oxidation
#7
Madlen Radlow, Mirjam Czjzek, Alexandra Jeudy, Jerome Dabin, Ludovic Delage, Catherine Leblanc, Jens Hartung
X-ray diffraction of native bromoperoxidase II (EC 1.11.1.18) from the brown alga Ascophyllum nodosum reveals at a resolution of 2.26 Ångström details of orthovanadate binding and homohexameric protein organization. Three dimers interwoven in contact regions and tightened by hydrogen bond-clamped guanidinium stacks along with regularly aligned water molecules form the basic structure of the enyzme. Intra- and intermolecular disulfide bridges further stabilize the enzyme preventing altogether the protein from denaturing up to a temperature of 90 °C, as evident from dynamic light scattering and the on-gel ortho-dianisidine assay...
April 17, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29618774/novel-approach-for-enhanced-scandium-and-titanium-leaching-efficiency-from-bauxite-residue-with-suppressed-silica-gel-formation
#8
Gözde Alkan, Bengi Yagmurlu, Seckin Cakmakoglu, Tobias Hertel, Şerif Kaya, Lars Gronen, Srecko Stopic, Bernd Friedrich
The need of light weight alloys for future transportation industry puts Sc and Ti under a sudden demand. While these metals can bring unique and desired properties to alloys, lack of reliable sources brought forth a supply problem which can be solved by valorization of the secondary resources. Bauxite residue (red mud), with considerable Ti and Sc content, is a promising resource for secure supply of these metals. Due to drawbacks of the direct leaching route from bauxite residue, such as silica gel formation and low selectivity towards these valuable metals, a novel leaching process based on oxidative leaching conditions, aiming more efficient and selective leaching but also considering environmental aspects via lower acid consumption, was investigated in this study...
April 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29570019/effect-of-various-bleaching-agents-on-the-surface-composition-and-bond-strength-of-a-calcium-silicate-based-cement
#9
S Kucukkaya Eren, H Aksel, O Uyanık, E Nagas
This study aimed to evaluate the morphological and elemental changes that occur on the surface of calcium silicate-based cement (CSC) and to analyze the bond strength of composite resin to CSC after application of various bleaching agents. One hundred twenty-five CSC blocks (Biodentine) were prepared and randomly divided into five groups according to the bleaching agent applied over the material surface (n=25): SP-DW (sodium perborate-distilled water mixture), SP-HP (sodium perborate-3% hydrogen peroxide [H2 O2 ] mixture), CP (37% carbamide peroxide gel), HP (35% H2 O2 gel), and a control group (no bleaching agent)...
March 23, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29570018/preventive-use-of-a-resin-based-desensitizer-containing-glutaraldehyde-on-tooth-sensitivity-caused-by-in-office-bleaching-a-randomized-single-blind-clinical-trial
#10
Acs Diniz, Snl Lima, RRdJ Tavarez, A H Borges, Scs Pinto, M R Tonetto, A D Loguercio, M C Bandéca
OBJECTIVE: To evaluate the risk and intensity of bleaching-induced tooth sensitivity (TS) after in-office bleaching following topical application of a resin-based glutaraldehyde desensitizer. METHODS: Thirty-three patients were randomly assigned to the experimental (Gluma Desensitizer Liquid, Heraeus Kulzer, Hanau, Germany) and placebo groups. The placebo or Gluma Desensitizer Liquid was applied for one minute prior to application of an in-office bleaching gel. Bleaching was performed with 35% hydrogen peroxide gel (three applications × 15 minutes each) over two sessions, one week apart...
March 23, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29550421/tasar-silk-fiber-waste-sericin-new-source-for-anti-elastase-anti-tyrosinase-and-anti-oxidant-compounds
#11
K Jena, J P Pandey, Ruchi Kumari, A K Sinha, V P Gupta, G P Singh
The present study, investigates the properties of sericin extracted from tasar silk fiber waste (TSFW). Separation of residual sericin from TSFW was confirmed by scanning electron microscope (SEM). The molecular weight distribution of sericin was examined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The results suggested that TSFW sericin represented a family of proteins with wide-ranging molecular weight distribution (11-245 kDa). Structural determination by FTIR revealed the presence of both α-helical and β-sheet structures...
March 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29550020/effect-of-topical-application-of-dipyrone-on-dental-sensitivity-reduction-after-in-office-dental-bleaching-a-randomized-triple-blind-multicenter-clinical-trial
#12
Márcia Rezende, Kaprice Chemin, Savil Costa Vaez, Aline Carvalho Peixoto, Jéssica de Freitas Rabelo, Stella Sueli Lourenço Braga, André Luis Faria-E-Silva, Gisele Rodrigues da Silva, Carlos José Soares, Alessandro D Loguercio, Alessandra Reis
BACKGROUND: Tooth sensitivity commonly occurs during and immediately after dental bleaching. The authors conducted a trial to compare tooth sensitivity after in-office bleaching after the use of either a topical dipyrone or placebo gel. METHODS: A split-mouth, triple-blind, randomized, multicenter clinical trial was conducted among 120 healthy adults having teeth that were shade A2 or darker. The facial tooth surfaces of the right or left sides of the maxillary arch of each patient were randomly assigned to receive either topical dipyrone or placebo gel before 2 in-office bleaching sessions (35% hydrogen peroxide) separated by 2 weeks...
March 14, 2018: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29533717/does-the-use-of-a-walking-bleaching-technique-increase-bone-resorption-markers
#13
C Bersezio, P Vildósola, M Sáez, F Sánchez, R Vernal, O B Oliveira, G Jorquera, J Basualdo, A Loguercio, E Fernández
OBJECTIVE: This randomized clinical trial evaluated the effect of 35% hydrogen peroxide in comparison with 37% carbamide peroxide in a nonvital bleaching technique of "walking bleaching" (four sessions of treatment) on periodontal markers: nuclear factor kappa B-ligand (RANK-L-process of root resorption marker) and interleukin 1β (IL-1β-inflammatory response marker). METHODS AND MATERIALS: Fifty volunteers presenting with discoloration of nonvital teeth and endodontic treatment in good condition participated...
May 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29520944/novel-treatment-of-in-office-tooth-bleaching-sensitivity-a-randomized-placebo-controlled-clinical-study
#14
Deepak Mehta, S Jyothi, Prashant Moogi, Werner J Finger, Keiichi Sasaki
OBJECTIVES: Aim of this clinical trial was to investigate the effect of a calcium phosphate based desensitizer paste applied prior to in-office tooth whitening on bleaching sensitivity (BS). METHODS: This crossover study was designed as randomized double-blinded, placebo-controlled trial. The desensitizer paste Teethmate AP (TAP) contains tetracalcium phosphate and dicalcium phosphate anhydrous in glycerol and polyethylene glycol, whereas placebo (PLA) is a calcium phosphate free analog...
March 9, 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29504887/effect-of-toothpaste-use-against-mineral-loss-promoted-by-dental-bleaching
#15
W F Vieira-Junior, L N Ferraz, Nip Pini, Gmb Ambrosano, Fhb Aguiar, Cpm Tabchoury, Danl Lima
AIM: To investigate the effect of different toothpaste formulations used prior to dental bleaching with 35% hydrogen peroxide (HP) on the mineral content and surface morphology of enamel. METHODS: Seventy bovine enamel blocks (4×4×2 mm) were submitted to in vitro treatment protocols using a toothbrushing machine prior to dental bleaching or a placebo procedure (n=10) as proposed in the following groups: unbleached control (PLA), bleached control (HP), and brushing with differing toothpastes prior to HP bleaching, including: potassium nitrate toothpaste containing sodium fluoride (PN), sodium monofluorophosphate/MFP toothpaste (FT), arginine-carbonate (8% arginine) (PA) or arginine-carbonate (1...
March 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29455516/core-shell-microneedle-gel-for-self-regulated-insulin-delivery
#16
Jinqiang Wang, Yanqi Ye, Jicheng Yu, Anna R Kahkoska, Xudong Zhang, Chao Wang, Wujin Sun, Ria D Corder, Zhaowei Chen, Saad A Khan, John B Buse, Zhen Gu
A bioinspired glucose-responsive insulin delivery system for self-regulation of blood glucose levels is desirable for improving health and quality of life outcomes for patients with type 1 and advanced type 2 diabetes. Here we describe a painless core-shell microneedle array patch consisting of degradable cross-linked gel for smart insulin delivery with rapid responsiveness and excellent biocompatibility. This gel-based device can partially dissociate and subsequently release insulin when triggered by hydrogen peroxide (H2 O2 ) generated during the oxidation of glucose by a glucose-specific enzyme covalently attached inside the gel...
March 27, 2018: ACS Nano
https://www.readbyqxmd.com/read/29449637/facile-emulsion-mediated-synthesis-of-phase-pure-diopside-nanoparticles
#17
Elena Tajuelo Rodriguez, Lawrence M Anovitz, Caleb D Clement, Adam J Rondinone, Michael C Cheshire
Diopside is a common natural pyroxene that is rarely found in a pure state, since magnesium is often partially substituted by iron, and other elements (sodium and aluminum) are often present. This pyroxene, along with feldspars and olivines, is common in concrete. As the prospective license renewal of light water reactors to 80 years of operation has raised concerns on the effects of radiation in the concrete biological shield surrounding the reactors, mineral nanoparticles can be valuable to perform amorphization studies to inform predictive models of mechanical properties of irradiated concrete...
February 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29442890/photocatalytic-and-cytotoxic-effects-of-nitrogen-doped-tio%C3%A2-nanoparticles-on-melanoma-cells
#18
Pedro Faria Zeni, Disley Prates Dos Santos, Rafael Renatino Canevarolo, José Andrés Yunes, Francine Ferreira Padilha, Ricardo Luiz C de Albuquerque Júnior, Silvia Maria Egues, Maria Lucila Hernández-Macedo
Titanium dioxide (TiO2) has attracted attention as a photosensitizer in the field of photodynamic therapy (PDT) due to its low toxicity and high photostability. In the present work, nitrogen-doped TiO2 (N-TiO2) nanoparticles had their photokilling efficiency evaluated on a murine melanoma cell line (B16-F10) and fibroblasts (NIH 3T3). The N-TiO2 nanoparticles were prepared by a modified hydrogen peroxide sol-gel process using triethylamine as nitrogen precursor. XRD measurements showed that all TiO2 and N-TiO2 samples consisted of an anatase crystalline phase and no trace of rutile was detected...
May 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29439773/effect-of-an-experimental-desensitizing-agent-on-reduction-of-bleaching-induced-tooth-sensitivity-a-triple-blind-randomized-clinical-trial
#19
Sibelli Olivieri Parreiras, Anna Luiza Szesz, Fabiana Madalozzo Coppla, Eveline Claudia Martini, Paulo Vitor Farago, Alessandro D Loguercio, Alessandra Reis
BACKGROUND: In this randomized study, split-mouth, triple-blind clinical trial, the authors evaluated the efficacy of a desensitizing gel that contained 5% potassium nitrate and 5% glutaraldehyde applied before in-office bleaching with 35% hydrogen peroxide (HP). METHODS: Treatment with the desensitizing or placebo control gels was randomly assigned to one-half of the maxillary teeth of 42 patients in a split-mouth design. The desensitizing gels were applied and maintained in contact with the tooth enamel for 10 minutes, followed by 2 HP bleaching sessions separated by 1 week...
April 2018: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29402954/randomized-controlled-clinical-trial-on-bleaching-sensitivity-and-whitening-efficacy-of-hydrogen-peroxide-versus-combinations-of-hydrogen-peroxide-and-ozone
#20
Mahmoud K Al-Omiri, Abdullah A Al Nazeh, Andrej M Kielbassa, Edward Lynch
The clinical efficacy regarding bleaching sensitivity and tooth shade lightening using a standard hydrogen peroxide (H2 O2 ) bleaching gel was compared with the additional use of ozone either before or after application of H2 O2 . Using computer-generated tables, 45 participants were randomly allocated into three groups (n = 15 each) in this investigator-driven, single-centre trial. In Group 1, upper anterior teeth were bleached using ozone (produced via a healOzone X4 device) for 60 seconds, then 38% H2 O2 for 20 minutes; in Group 2, 38% H2 O2 application (20 min) was followed by ozone (60 s); air produced by the healOzone machine (60 s) followed by 38% H2 O2 (20 min) was used in Group 3 (control)...
February 5, 2018: Scientific Reports
keyword
keyword
40212
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"