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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/29783786/graphene-based-nanomaterials-for-tissue-engineering-in-the-dental-field
#2
REVIEW
Riccardo Guazzo, Chiara Gardin, Gloria Bellin, Luca Sbricoli, Letizia Ferroni, Francesco Saverio Ludovichetti, Adriano Piattelli, Iulian Antoniac, Eriberto Bressan, Barbara Zavan
The world of dentistry is approaching graphene-based nanomaterials as substitutes for tissue engineering. Apart from its exceptional mechanical strength, electrical conductivity and thermal stability, graphene and its derivatives can be functionalized with several bioactive molecules. They can also be incorporated into different scaffolds used in regenerative dentistry, generating nanocomposites with improved characteristics. This review presents the state of the art of graphene-based nanomaterial applications in the dental field...
May 20, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29780907/calcified-amorphous-tumor-a-rare-cause-of-central-retinal-artery-occlusion
#3
Jeffrey H Ma, Manjot K Gill
Purpose: We report the case of a central retinal artery occlusion secondary to presumed embolus from a calcified amorphous tumor of the heart, a very rare non-neoplastic cardiac mass. Observations: A 60-year-old female presented with acute unilateral vision loss of the left eye. Examination revealed hand motion visual acuity of the left eye and a left relative afferent pupillary defect. Fundoscopy showed whitening of the macula with a cherry red spot, consistent with a central retinal artery occlusion...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29773006/antimelanogenesis-and-anti-inflammatory-activity-of-selected-culinary-medicinal-mushrooms
#4
Hazwani Mat Saad, Kae Shin Sim, Yee Shin Tan
Five culinary-medicinal mushrooms are commonly available in the Malaysian market: Agaricus bisporus (white and brown), Ganoderma lucidum, Hypsizygus marmoreus, Pleurotus floridanus, and P. pulmonarius. These species were selected for use in the current study, the aim of which was to investigate the antimelanogenesis and anti-inflammatory activity of these mushrooms in an attempt to evaluate their potential use in cosmeceuticals. Mushroom fruiting bodies were extracted with hot water, and the extracts were freeze-dried before testing...
2018: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29758152/efficacy-of-teeth-whitening-with-a-mouthwash-in-vitro-and-in-vivo-approaches
#5
Franco Gasparri, Bruce Richard Schemehorn, Andrea Zanardi
OBJECTIVES: Two different studies were conducted to evaluate the whitening efficacy of a mouthwash versus a placebo using in vitro and in vivomodels. The tested mouthwash was formulated with no oxidizing or abrasive agents containing chlorhexidine (CHX) and polyvinylpyrrolidone (PVP). METHODS: The purpose of the in vitro study was to determine whether the mouthwash formulation OC15AB could reduce the accumulation of staining in an accepted stain model. Bovine central incisors were cut to obtain enamel specimens of ~8 × 8 mm2...
March 2018: Journal of Clinical Dentistry
https://www.readbyqxmd.com/read/29755181/the-pervasive-role-of-social-learning-in-primate-lifetime-development
#6
REVIEW
Andrew Whiten, Erica van de Waal
In recent decades, an accelerating research effort has exploited a substantial diversity of methodologies to garner mounting evidence for social learning and culture in many species of primate. As in humans, the evidence suggests that the juvenile phases of non-human primates' lives represent a period of particular intensity in adaptive learning from others, yet the relevant research remains scattered in the literature. Accordingly, we here offer what we believe to be the first substantial collation and review of this body of work and its implications for the lifetime behavioral ecology of primates...
2018: Behavioral Ecology and Sociobiology
https://www.readbyqxmd.com/read/29747203/providing-fantastic-whitening-value
#7
(no author information available yet)
No abstract text is available yet for this article.
May 11, 2018: British Dental Journal
https://www.readbyqxmd.com/read/29744907/depigmentation-efficacy-of-galacturonic-acid-through-tyrosinase-regulation-in-b16-murine-melanoma-cells-and-a-three-dimensional-human-skin-equivalent
#8
C S Lee, H S Baek, I-H Bae, S J Choi, Y J Kim, J H Lee, J W Kim
Sugar is a well-known cosmetic ingredient for moisturizing skin with minimal side-effects. Several reports have demonstrated an antimelanogenic effect of sugar in melanocytes. We evaluated the whitening efficacy of galacturonic acid (GA), the main component of pectin, as an anti-melanogenic agent. GA significantly suppressed melanin synthesis and secretion in a concentration-dependent manner in α-melanocyte stimulating hormone-treated B16 melanoma cells, and inhibited tyrosinase activity and expression at a dose of 10 mmol/L...
May 9, 2018: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/29744085/bleachorexia-an-addictive-behavior-to-tooth-bleaching-a-case-report
#9
Denzel Kun-Tsung Lee, Cameron Kastl, Daniel C N Chan
Bleachorexia, addiction to tooth bleaching, is a behavioral disorder similar to anorexia. The patient feels that their teeth are always not white enough and continues to use whiteners to obtain a "perfect" smile. Such behavior falls under the category of a body dysmorphic disorder and may need medical counseling.
May 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29740421/toxicity-of-food-grade-tio-2-to-commensal-intestinal-and-transient-food-borne-bacteria-new-insights-using-nano-sims-and-synchrotron-uv-fluorescence-imaging
#10
Joanna M Radziwill-Bienkowska, Pauline Talbot, Jasper B J Kamphuis, Véronique Robert, Christel Cartier, Isabelle Fourquaux, Esther Lentzen, Jean-Nicolas Audinot, Frédéric Jamme, Matthieu Réfrégiers, Jacek K Bardowski, Philippe Langella, Magdalena Kowalczyk, Eric Houdeau, Muriel Thomas, Muriel Mercier-Bonin
Titanium dioxide (TiO2 ) is commonly used as a food additive (E171 in the EU) for its whitening and opacifying properties. However, a risk of intestinal barrier disruption, including dysbiosis of the gut microbiota, is increasingly suspected because of the presence of a nano-sized fraction in this additive. We hypothesized that food-grade E171 and Aeroxyde P25 (identical to the NM-105 OECD reference nanomaterial in the European Union Joint Research Centre) interact with both commensal intestinal bacteria and transient food-borne bacteria under non-UV-irradiated conditions...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29738481/speech-enhancement-of-mobile-devices-based-on-the-integration-of-a-dual-microphone-array-and-a-background-noise-elimination-algorithm
#11
Yung-Yue Chen
Mobile devices are often used in our daily lives for the purposes of speech and communication. The speech quality of mobile devices is always degraded due to the environmental noises surrounding mobile device users. Regretfully, an effective background noise reduction solution cannot easily be developed for this speech enhancement problem. Due to these depicted reasons, a methodology is systematically proposed to eliminate the effects of background noises for the speech communication of mobile devices. This methodology integrates a dual microphone array with a background noise elimination algorithm...
May 8, 2018: Sensors
https://www.readbyqxmd.com/read/29729698/poria-cocos-wolf-extracts-represses-pigmentation-in-vitro-and-in-vivo
#12
HyunKyung Lee, Hwa Jun Cha
In skin, melanocytes determine skin color using melanogenesis, which induces protective mechanism to oxidative stress and UV damage. However, when melanin is excessive produced by the various stimulus, the accumulated melanin induces hyperpigmentation disease such as melasma, freckles, Melanism ware induced. Therefore, it is implicated to finding potential agents for whitening to be used in cosmetic products. In our present study, we show that Poria cocos Wolf extracts decreased melanin synthesis in B16F10...
April 30, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29728617/depletion-of-nsd2-mediated-histone-h3k36-methylation-impairs-adipose-tissue-development-and-function
#13
Lenan Zhuang, Younghoon Jang, Young-Kwon Park, Ji-Eun Lee, Shalini Jain, Eugene Froimchuk, Aaron Broun, Chengyu Liu, Oksana Gavrilova, Kai Ge
The epigenetic mechanisms regulating adipose tissue development and function are poorly understood. In this study, we show that depletion of histone H3K36 methylation by H3.3K36M in preadipocytes inhibits adipogenesis by increasing H3K27me3 to prevent the induction of C/EBPα and other targets of the master adipogenic transcription factor peroxisome proliferator-activated receptor-γ (PPARγ). Depleting H3K36 methyltransferase Nsd2, but not Nsd1 or Setd2, phenocopies the effects of H3.3K36M on adipogenesis and PPARγ target expression...
May 4, 2018: Nature Communications
https://www.readbyqxmd.com/read/29728537/effect-of-over-the-counter-whitening-products-associated-or-not-with-10-carbamide-peroxide-on-color-change-and-microhardness-in-vitro-study
#14
Ana Lb Jurema, Evaniele S Claudino, Carlos Rg Torres, Eduardo Bresciani, Taciana Mf Caneppele
Aim: The purpose of this in vitro study was to evaluate the color and microhardness of teeth subjected to different over-the-counter (OTC) whitening products in association or not with 10% carbamide peroxide (10% CP). Materials and methods: Enamel-dentin specimens (n = 210) were obtained from bovine incisors and stained. Half of the specimens were then subjected to daily cycles of staining (5 minutes), 10% CP bleaching (8 hours) in association with OTC products, and artificial saliva storage until complete 24 hours, for 2 weeks; the other half was subjected to daily cycles of staining, OTC treatment, and storage in artificial saliva for 12 weeks...
April 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29724435/lung-sounds-classification-using-convolutional-neural-networks
#15
Dalal Bardou, Kun Zhang, Sayed Mohammad Ahmad
Lung sounds convey relevant information related to pulmonary disorders, and to evaluate patients with pulmonary conditions, the physician or the doctor uses the traditional auscultation technique. However, this technique suffers from limitations. For example, if the physician is not well trained, this may lead to a wrong diagnosis. Moreover, lung sounds are non-stationary, complicating the tasks of analysis, recognition, and distinction. This is why developing automatic recognition systems can help to deal with these limitations...
May 1, 2018: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/29721218/combined-effects-of-electric-toothbrushing-and-dentifrice-on-artificial-stain-removal-an-in-vitro-study
#16
Akiko Haruyama, Atsushi Kameyama, Tomoko Ono, Yukako Baba, Toshiko Sugiyama, Setsuko Sugiyama, Toshiyuki Takahashi
Background: This in vitro study aimed to clarify the combined effect of electric toothbrushing and dentifrice on the removal of artificial stain. Material and Methods: Twenty-five bovine incisors were cut at the cervix and the crown was embedded in auto-cured acrylic resin. Specimens were abraded using #240 SiC paper to obtain a flat enamel surface, and 20 specimens were treated with 10% citric acid / 3% ferric chloride solution followed by 1% tannic acid solution to produce surface staining...
March 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29701534/development-and-validation-of-an-hplc-method-with-fluorescence-detection-for-the-determination-of-fluorescent-whitening-agents-migrating-from-plastic-beverage-cups
#17
João F Alberto Lopes, Emmanouil D Tsochatzis, Hendrik Emons, Eddo Hoekstra
An HPLC method with fluorescence detection has been developed and validated for the quantification of six fluorescent whitening agents (FWA) in plastic beverage cups after extraction and in food simulants after migration at 70 o C for 2 h. The sensitivity of the method was high with LODs ranging from 0.053 to 0.251 μg kg-1 and LOQs, from 0.107 to 0.504 μg kg-1 . Accuracy and precision were highly acceptable, with recoveries greater than 82 % and RSDs (%) below 16 %. The expanded combined uncertainty was found to be less than 23% for the measurements of all studied FWAs...
April 27, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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
#18
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/29694122/matching-matched-filtering-with-deep-networks-for-gravitational-wave-astronomy
#19
Hunter Gabbard, Michael Williams, Fergus Hayes, Chris Messenger
We report on the construction of a deep convolutional neural network that can reproduce the sensitivity of a matched-filtering search for binary black hole gravitational-wave signals. The standard method for the detection of well-modeled transient gravitational-wave signals is matched filtering. We use only whitened time series of measured gravitational-wave strain as an input, and we train and test on simulated binary black hole signals in synthetic Gaussian noise representative of Advanced LIGO sensitivity...
April 6, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29689206/social-dynamics-knowledgeable-lemurs-gain-status
#20
Andrew Whiten
A new study shows both that socially well-connected lemurs are more likely to acquire new behavioral innovations, and that individuals displaying such useful new knowledge gain in status. Such positive feedback loops may help explain resilient cultural transmission in animals.
April 23, 2018: Current Biology: CB
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