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https://www.readbyqxmd.com/read/29326518/toothpaste-use-protocol-with-dental-bleaching-for-a-conservative-treatment-case-reports
#1
Waldemir F Vieira-Junior, Thayla H N Gouveia, Bruna G Silva, Vanessa C P S Bueno, Flávio H B Aguiar, Débora A N L Lima
In-office bleaching is a treatment based on products that contain hydrogen peroxide (HP) while demonstrating whitening effectiveness. HP could promote alterations to surface morphologies and properties of dental tissues. The objective was describe a toothpaste protocol associated to bleaching therapy to promote a safer approach. Patient 1 (male) and Patient 2 (female) were attended, and toothbrushing (twice a day) with a dentifrice containing bioactive glass (BG) (NovaMin™) and fluoride was indicated before and during the treatment...
October 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29326505/influence-of-intracanal-irrigants-on-coronal-fracture-resistance-of-endodontically-treated-and-bleached-teeth-an-in-vitro-study
#2
Maryam Khoroushi, Fatemeh Tavakol, Farinaz Shirban, Sanaz Ziaei
Background: Irrigation has a key role in the success of endodontic treatment. Intracanal irrigant solutions have adverse effects on the physical properties of dentin. Aim: The present study aimed to evaluate the effect of different irrigation protocols on coronal fracture resistance of endodontically treated teeth undergoing bleaching treatment. Design and Materials and Methods: Access cavities were prepared in 120 maxillary premolars which were divided into two groups (n = 60) - Group A: nonbleached, Group B: bleached (B)...
October 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29324642/antibacterial-and-antioxidant-capacities-and-attenuation-of-lipid-accumulation-in-3t3-l1-adipocytes-by-low-molecular-weight-fucoidans-prepared-from-compressional-puffing-pretreated-sargassum-crassifolium
#3
Chun-Yung Huang, Chia-Hung Kuo, Chia-Hsin Lee
In this study, we extracted fucoidan from compressional-puffing-pretreated Sargassum crassifolium by hot water. The crude extract of fucoidan (SC) was degraded by various degradation reagents and four low-molecular-weight (LMW) fucoidans, namely SCO (degradation by hydrogen peroxide), SCA (degradation by ascorbic acid), SCOA (degradation by hydrogen peroxide + ascorbic acid), and SCH (degradation by hydrogen chloride) were obtained. The degradation reagents studied could effectively degrade fucoidan into LMW fucoidans, as revealed by intrinsic viscosity, agarose gel electrophoresis, and molecular weight analyses...
January 11, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29314845/photo-induced-oscillations-and-pulse-waves-in-the-hydrogen-peroxide-sulfite-ferrocyanide-reaction
#4
Yang Liu, Ling Yuan, Changwei Pan, Jianmin Gao, Wenxiu Zhou, Qingyu Gao
The hydrogen peroxide-sulfite-ferrocyanide reaction shows excellent photosensitivity under pulse light illumination, which can be used to efficiently control the spatiotemporal dynamics of the nonlinear chemical system. Here, we numerically simulated the photo-induced pH oscillations by integrating two models which describe the oscillatory and photosensitive behaviors, respectively. A dynamic transition from the low-pH steady state to oscillations can be obtained using light illumination. In accordance with the simulation results, oscillatory dynamics was experimentally obtained under the light illumination through excitation of low-pH steady state...
January 9, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29304422/bleaching-and-enamel-surface-interactions-resulting-from-the-use-of-highly-concentrated-bleaching-gels
#5
Guillermo Grazioli, Lisia Lorea Valente, Cristina Pereira Isolan, Helena Alves Pinheiro, Camila Gonçalves Duarte, Eliseu Aldrighi Münchow
Tooth bleaching is considered a non-invasive treatment, although the use of highly-concentrated products may provoke increased surface roughness and enamel demineralization, as well as postoperative sensitivity. Thus, the aim of this study was to investigate whether hydrogen peroxide (H2O2) concentration would affect tooth bleaching effectiveness and the enamel surface properties. Enamel/dentin bovine specimens (6 × 4 mm) were immersed in coffee solution for 7 days and evaluated with a spectrophotometer (Easyshade; baseline), using the CIEL*a*b* color parameters...
December 28, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29302958/crystal-growth-of-zif-8-zif-67-and-their-mixed-metal-derivatives
#6
Daniel Saliba, Manal Ammar, Moustafa Rammal, Mazen Al-Ghoul, Mohamad Hmadeh
A facile method to produce Zeolitic Imidazolate Frameworks (ZIF-8, ZIF-67 and solid-solution ZIFs (mixed Co and Zn)) is reported. ZIF crystals are produced via a reaction-diffusion framework (RDF) by diffusing an outer solution at a relatively high concentration of the 2-methyl imidazole linker (HmIm) into an agar gel matrix containing the divalent metal (zinc (II) and/or cobalt (II)) at room temperature. Accordingly, a propagating supersaturation wave, initiated at the interface between the outer solution and the gel matrix leads to a precipitation front endowed with a gradient of crystal sizes ranging between 100 nm and 55 m along the same reaction tube...
January 5, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29289725/in-office-dental-bleaching-with-light-vs-without-light-a-systematic-review-and-meta-analysis
#7
REVIEW
Bianca Medeiros Maran, Adrieli Burey, Thalita de Paris Matos, Alessandro D Loguercio, Alessandra Reis
OBJECTIVE: A systematic review and meta-analysis were performed to answer the following research question: Does light-activated in-office vital bleaching have a greater whitening efficacy and higher tooth sensitivity (TS) in comparison with in-office vital bleaching without light when used in adults? DATA AND SOURCE: Only randomized clinical trials (RCTs) involving adults who had in-office bleaching with and without light activation were included. Controlled vocabulary and keywords were used in a comprehensive search for titles and abstracts in PubMed, and this search was adapted for Scopus, Web of Science, LILACS, BBO, EMBASE, Cochrane Library, and SIGLE without restrictions in May 2016 and was updated in August 2017...
December 28, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29284097/effectiveness-of-led-laser-irradiation-on-in-office-dental-bleaching-after-three-years
#8
Rfl Mondelli, Fap Rizzante, E R Rosa, Afs Borges, A Y Furuse, Jfs Bombonatti
The present in vivo randomized, triple-blinded, and split-mouth clinical study evaluated the effectiveness of a hybrid light (HL) source on the color change, stability, and tooth sensitivity in patients submitted to different in-office bleaching techniques. Twenty volunteers were divided into two groups and four subgroups. A split-mouth design was conducted to compare two in-office bleaching techniques (with and without light activation): 35% Lase Peroxide Sensy (LPS) + HL: 35% hydrogen peroxide (HP) + HL; 35% LPS: 35% HP; 25% LPS + HL: 25% HP + HL; and 35% Whiteness HP (WHP): 35% HP...
January 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29211128/in-office-tooth-bleaching-for-adolescents-using-hydrogen-peroxide-based-gels-clinical-trial
#9
Marcela Leticia Leal Gonçalves, Antonio Carlos da Silva Tavares, Ana Carolina Costa da Mota, Luiz Alberto Plácido Penna, Alessandro Melo Deana, Sandra Kalil Bussadori
The aim of the present study was to evaluate colorimetric changes and tooth sensitivity in adolescents and young patients submitted to tooth bleaching with 20% and 35% hydrogen peroxide. A randomized, controlled, clinical trial was conducted with 53 patients aged 11 to 24 years who were allocated to groups based on the use of the following commercial products: Whiteness HP - FGM® (35% hydrogen peroxide); Whiteness HP Blue Calcium - FGM® (35% hydrogen peroxide); and Whiteness HP Blue Calcium - FGM® (20% hydrogen peroxide)...
November 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29196947/effect-of-bleaching-agent-extracts-on-murine-macrophages
#10
Aletéia M M Fernandes, Polyana G F Vilela, Marcia C Valera, Carola Bolay, Karl Anton Hiller, Helmut Schweikl, Gottfried Schmalz
OBJECTIVES: The aim of this study was to evaluate the cytotoxicity and the influence of bleaching agents on immunologically cell surface antigens of murine macrophages in vitro. MATERIALS AND METHODS: RAW 264.7 cells were exposed to bleaching gel extracts (40% hydrogen peroxide or 20% carbamide peroxide) and different H2O2 concentrations after 1 and 24-h exposure periods and 1-h exposure and 23-h recovery. Tests were performed with and without N-acetyl cysteine (NAC) and buthionine sulfoximine (BSO)...
December 1, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29180043/isolation-and-pharmacological-characterization-of-a-new-cytotoxic-l-amino-acid-oxidase-from-bungarus-multicinctus-snake-venom
#11
Wuguang Lu, Lingling Hu, Jie Yang, Xiaoyan Sun, Huaijiang Yan, Jinman Liu, Jiao Chen, Xiaolan Cheng, Qian Zhou, Ye Yu, Ji-Fu Wei, Peng Cao
ETHNOPHARMACOLOGICAL RELEVANCE: Bungarus multicinctus snake belongs to Elapidae family and is widely distributed in southern China. It is widely used in traditional Chinese medicine with the effect of dispelling wind and removing obstruction in the meridians. Moreover, it is also as a chief ingredient of many polyherbal formulations for the treatment of cancer. AIM OF THE STUDY: To evaluate the antitumor activity of Bungarus multicinctus snake venom components and isolate, characterize the most effective anti-tumor component of Bungarus multicinctus snake venom...
November 26, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29158881/serum-proteomic-profiling-of-obsessive-compulsive-disorder-washing-subtype-a-preliminary-study
#12
Mona Zamanian-Azodi, Mostafa Rezaei-Tavirani, Naser Nejadi, Afsaneh Arefi Oskouie, Faird Zayeri, Mostafa Hamdieh, Akram Safaei, Majid Rezaei-Tavirani, Alireza Ahmadzadeh, Alireza Amouzandeh-Nobaveh, Farshad Okhovatian
Introduction: Obsessive-Compulsive Disorder (OCD) is a disabling mental condition that its proteomic profiling is not yet investigated. Proteomics is a valuable tool to discover biomarker approaches. It can be helpful to detect protein expression changes in complex disorders such as OCD. Methods: Here, by the application of 2D gel electrophoresis (2DE), a pilot study of serum proteome profile of females with washing subtype of OCD was performed. Serum samples were obtained from females with washing subtype of OCD...
July 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/29153956/effect-of-laser-activated-bleaching-on-the-chemical-stability-and-morphology-of-intracoronal-dentin
#13
Fabiane Carneiro Lopes, Renato Roperto, Anna Akkus, Ozan Akkus, Regina Guenka Palma-Dibb, Manoel Damião de Sousa-Neto
OBJECTIVES: To evaluate the effect of the bleaching with 35% hydrogen peroxide either activated or not by a 970nm diode laser on the chemical stability and dentin surface morphology of intracoronary dentin. METHODS: Twenty-seven slabs of intracoronary dentin specimens (3×3mm) were distributed into three groups (n=9), according to surface treatment: HP - 35% hydrogen peroxide (1×4'), DL - 970nm diode laser (1×30"/0,8W/10Hz), HP+DL - 35% HP activated with 970nm diode laser (1×30"/0,8W/10Hz leaving the gel in contact to the surface for 4' after activation)...
November 13, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29151651/rna-binding-domain-is-necessary-for-pprm-function-in-response-to-the-extreme-environmental-stress-in-deinococcus-radiodurans
#14
Wei Li, Yun Ma, Jie Yang, Fangzhu Xiao, Wuzhou Wang, Shuya He
Deinococcus radiodurans was considered as one of the most radiation-resistant organisms on Earth because of its strong resistance to the damaging factors of both DNA and protein, including ionizing radiation, ultraviolet radiation, oxidants, and desiccation. PprM, as a bacterial cold shock protein homolog, was involved in the radiation resistance and oxidative stress response of D. radiodurans, but its potential mechanisms are poorly expounded. In this study, we found that PprM was highly conserved with the RNA-binding domain in Deinococcus genus through performing phylogenic analysis...
December 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/29130615/in-office-bleaching-efficacy-on-stain-removal-from-cad-cam-and-direct-resin-composite-materials
#15
Amal Alharbi, Stefano Ardu, Tissiana Bortolotto, Ivo Krejci
OBJECTIVE: To evaluate the efficacy of in-office bleaching on stain removal from stained resin composite and ceramic computer-assisted design/computer-assisted manufacturing (CAD/CAM) blocks and direct resin composites. METHODS: Forty disk-shaped samples were fabricated from each of nine materials: six CAD/CAM (VITABLOCS Mark II, Paradigm MZ100, Exp Vita Hybrid Ceramic, VITA ENAMIC, Exp Kerr, and LAVA Ultimate) and three direct resin composites (Filtek Supreme, Venus Diamond, and Filtek Silorane)...
November 11, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29125909/calcium-phosphate-microspheres-as-a-delivery-vehicle-for-tooth-bleaching-agents
#16
T Mellgren, T Qin, C Öhman-Mägi, Y Zhang, B Wu, W Xia, H Engqvist
Bleaching of vital teeth has become common practice in cosmetic dentistry today. Tooth sensitivity and demineralization of the enamel are, however, common side effects associated with hydrogen and carbamide peroxide bleaching. This study investigated if calcium phosphate microspheres, which have remineralizing properties, could be used as an additive without hindering the diffusion of the bleaching agent and if the spheres could be used as a carrier for carbamide peroxide. A remineralizing agent could increase the safety of bleaching and decrease the severity of its side effects...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29110940/process-for-recycling-mixed-cathode-materials-from-spent-lithium-ion-batteries-and-kinetics-of-leaching
#17
Li Li, Yifan Bian, Xiaoxiao Zhang, Yibiao Guan, Ersha Fan, Feng Wu, Renjie Chen
A "grave-to-cradle" process for the recycling of spent mixed-cathode materials (LiCoO2, LiCo1/3Ni1/3Mn1/3O2, and LiMn2O4) has been proposed. The process comprises an acid leaching followed by the resynthesis of a cathode material from the resulting leachate. Spent cathode materials were leached in citric acid (C6H8O7) and hydrogen peroxide (H2O2). Optimal leaching conditions were obtained at a leaching temperature of 90 °C, a H2O2 concentration of 1.5 vol%, a leaching time of 60 min, a pulp density of 20 g L(-1), and a citric acid concentration of 0...
October 27, 2017: Waste Management
https://www.readbyqxmd.com/read/29109320/effects-of-the-ratio-between-pigment-and-bleaching-gel-on-the-fracture-resistance-and-dentin-microhardness-of-endodontically-treated-teeth
#18
Marina Og Galloza, Keren Cf Jordão-Basso, Matheus C Bandeca, Samuel O Costa, Alvaro H Borges, Mateus R Tonetto, Fabio C Tirintan, Kátia C Keine, Milton C Kuga
INTRODUCTION: The aim of this study was to evaluate the effects of bleaching gel using 35% hydrogen peroxide (HP), associated with red carmine pigment (RC), in the 3:1 or 1:1 ratio, on fracture resistance and dentin microhardness of endodontically treated teeth. MATERIALS AND METHODS: A total of 40 lower incisors were endodontically treated and divided into four groups (n = 10), according to the bleaching protocol: G1 (HP3), 35% HP + RC (3:1); G2 (HP1), 35% HP + RC (1:1); G3 (positive), 38% HP; and G4 (negative), unbleached...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29080164/determination-of-di-polyamine-oxidase-activity-in-plants-by-an-in-gel-spermidine-oxidation-assay
#19
Panagiotis N Moschou
Diamine and polyamine catabolism controls plant development, resistance to pathogens and stress responses. Diamine and polyamine oxidases control the catabolism of diamines and polyamines, respectively. Two major routes of di-/polyamine catabolism exist: the terminal and the interconverting. The in vitro activity of each route is assayed by the colorimetric or chemiluminescent determination of hydrogen peroxide produced by oxidation of di-/polyamine substrates. However, these assays fail to estimate activity of individual di-/polyamine oxidase isoenzymes...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29071038/evaluation-of-the-effect-of-different-laser-activated-bleaching-methods-on-enamel-susceptibility-to-caries-an-in-vitro-mode
#20
Sajjad Ashnagar, Abbas Monzavi, Mehdi Abbasi, Mahdi Aghajani, Nasim Chiniforush
Introduction: Today, bleaching is a routine noninvasive alternative for treatment of discolored teeth. The aim of this study was to determine whether conventional or laser activated bleaching predispose teeth to develop caries or not. Methods: Sixty human molars were mounted on acrylic cylinders and their Knoop microhardness (KHN) as well as DIAGNOdent (DD) values were recorded. They were divided into 4 experimental groups; G1) conventional bleaching with 40% hydrogen peroxide gel, G2) Diode laser assisted bleaching with same gel, G3) Nd:YAG laser assisted bleaching with the same gel, G4) control group...
2017: Journal of Lasers in Medical Sciences
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