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https://www.readbyqxmd.com/read/28921547/a-clinical-randomized-study-on-the-influence-of-dental-whitening-on-streptococcus-mutans-population
#1
André Luiz Fraga Briso, Úrsula Aparecida Escalero Silva, Morganna Borges de Almeida Souza, Vanessa Rahal, Elerson Gaetti Jardim Júnior, Luciano Tavares Angelo Cintra
Dental whitening with peroxides has been popularized through the at-home technique, which employs low concentrations of peroxide applied on individual trays. However, there are few clinical trials reporting the effects of its continuous use on oral microbiota. Thus, the purpose of the present clinical, randomized study was to evaluate the influence of at-home whitening treatment on Streptococcus mutans in saliva, buccal mucosa, and subgingival and supragingival plaque. Thirty volunteers were randomly divided into 2 study groups (n=15) according to the whitening therapy: G CP- whitening using 10% carbamide peroxide 4 hours daily for 21 days and G HP- whitening using 6% hydrogen peroxide 1...
September 16, 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28902240/randomized-clinical-trials-of-dental-bleaching-compliance-with-the-consort-statement-a-systematic-review
#2
Alessandro Dourado Loguercio, Bianca Medeiros Maran, Taíse Alessandra Hanzen, Alexandra Mara de Paula, Jorge Perdigão, Alessandra Reis
We reviewed the literature to evaluate: a) The compliance of randomized clinical trials (RCTs) on bleaching with the CONSORT; and b) the risk of bias of these studies using the Cochrane Collaboration risk of bias tool (CCRT). We searched the Cochrane Library, PubMed and other electronic databases, to find RCTs focused on bleaching (or whitening). The articles were evaluated in compliance with CONSORT in a scale: 0 = no description, 1 = poor description and 2 = adequate description. Descriptive analyses of the number of studies by journal, follow-up period, country and quality assessments were performed with CCRT for assessing risk of bias in RCTs...
August 28, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28899502/melaleuca-quinquenervia-essential-oil-inhibits-%C3%AE-melanocyte-stimulating-hormone-induced-melanin-production-and-oxidative-stress-in-b16-melanoma-cells
#3
Wen-Wan Chao, Chia-Chi Su, Hsin-Yi Peng, Su-Tze Chou
BACKGROUND: Essential oils are odorous, volatile products of plant secondary metabolism, which are found in many leaves and stems. They show important biological activities, which account for the development of aromatherapy used in complementary and alternative medicine. The essential oil extracted from Melaleuca quinquenervia (Cav.) S.T. Blake (paperbark) (MQ-EO) has various functional properties. PURPOSE: The aim of this study is to investigate the chemical composition of MQ-EO by using gas chromatography-mass spectrometry (GC-MS) and evaluate its tyrosinase inhibitory activity...
October 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28890268/novel-acylhydrazone-bond-dynamic-covalent-polymer-gel-monolithic-column-online-coupling-to-high-performance-liquid-chromatography-for-analysis-of-sulfonamides-and-fluorescent-whitening-agents-in-food
#4
Chengjiang Zhang, Xialin Luo, Tianfu Wei, Yufei Hu, Gongke Li, Zhuomin Zhang
A new dynamic covalent polymer (DCP) gel was well designed and constructed based on imine chemistry. Polycondensation of 4,4'-biphenyldicarboxaldehyde and 1,3,5-benzenetricarbohydrazide via Schiff-base reaction resulted in an acylhydrazone bond gel (AB-gel) DCP. AB-gel DCP had three-dimensional network of interconnected nanoparticles with hierarchically porous structure. AB-gel DCP was successfully fabricated as a monolithic column by an in-situ chemical bonding method for online enrichment and separation purpose with excellent permeability...
September 4, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28885631/surface-fouling-as-a-mechanism-for-chemotaxis-in-isotropic-catalytic-swimmers
#5
Keith E Whitener
We present microscopic models for surface fouling of an isotropic spherical catalytic microswimmer at and away from equilibrium and show how a foulant gradient can induce chemotactic behavior. Our simulations establish that the presence of foulant manifests itself in two ways: as a braking effect on propulsive particle motion, and as a drift term which probes the foulant concentration gradient. Our results suggest that, while foulant gradients are unlikely to be directly useful for chemotactically directed particles, they nevertheless exert a non-negligible influence on particle motion under a wide range of conditions...
September 8, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28884442/whitening-and-anti-wrinkle-activities-of-ferulic-acid-isolated-from-tetragonia-tetragonioides-in-b16f10-melanoma-and-ccd-986sk-fibroblast-cells
#6
Hye-Jin Park, Jun-Hyo Cho, Shin-Hyub Hong, Dong-Hee Kim, Hee-Young Jung, In-Kyu Kang, Young-Je Cho
Ferulic acid isolated from Tetragonia tetragonioides was tested for its whitening effect on the B16F10 mouse melanoma cell line and its anti-wrinkle activity on the CCD-986sk human dermal fibroblast cell line. Ferulic acid, one of the primary phenolic compounds that can be isolated from T. tetragonioides, has been reported to show potential as a functional food, for its whitening effect and anti-wrinkle activity. To measure its whitening and anti-wrinkle activities, cells were treated with ferulic acid isolated from T...
September 7, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28872728/changes-to-glazed-dental-ceramic-shade-roughness-and-microhardness-after-bleaching-and-simulated-brushing
#7
Carlos Roberto Teixeira Rodrigues, Cecilia Pedroso Turssi, Flávia Lucisano Botelho Amaral, Roberta Tarkany Basting, Fabiana Mantovani Gomes França
PURPOSE: To evaluate shade stability, surface roughness, microhardness, and compressive strength of a glazed feldspathic ceramic subjected to bleaching and simulated brushing. MATERIALS AND METHODS: Eighty-eight glazed feldspathic ceramic specimens were made from microparticulate leucite and divided into eight groups (n = 10). The whitening products used were: Opalescence Trèswhite Supreme (Ultradent), Opalescence®\ PF 15% (Ultradent), and Oral-B 3D White Whitestrips...
September 5, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28864787/screening-for-diabetes-in-a-dental-school-clinic-to-assess-interprofessional-communication-between-physicians-and-dental-students
#8
Rick Ken Biethman, Cyril Pandarakalam, M Nathalia Garcia, Sara Whitener, Charles F Hildebolt
If a dental student diagnoses a patient in a dental school clinic as being at high risk of prediabetes or diabetes, the patient should be referred to his or her physician for further diagnostic evaluation, and the physician should send back the evaluation results so that the dental team can optimize treatment and health care choices if the diagnosis is confirmed. The primary aim of this study was to evaluate physicians' responses to written and oral requests for information regarding follow-up diabetes testing...
September 2017: Journal of Dental Education
https://www.readbyqxmd.com/read/28863366/fat-enriched-rather-than-high-fructose-diets-promote-whitening-of-adipose-tissue-in-a-sex-dependent-manner
#9
Jochen Dobner, Claudia Ress, Kerstin Rufinatscha, Karin Salzmann, Willi Salvenmoser, Sabrina Folie, Verena Wieser, Patrizia Moser, Guenter Weiss, Georg Goebel, Herbert Tilg, Susanne Kaser
Adipose tissue is a critical regulator of energy metabolism and an effector organ of excessive caloric intake. We studied the effects of high-fructose (HFruD), high-fat (HFD) and mixed high-sucrose and high-fat diet (HFHSD) on adipocyte morphology and biology and consecutive metabolic effects in male and female C57BL/6 mice. Forty male and 40 female mice were randomly assigned to one of four dietary groups and fed for 10 weeks ad libitum. After 10 weeks of feeding, mice were analyzed in regard to glucose metabolism, insulin sensitivity and alteration in adipocyte morphology and function...
July 24, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28863365/a-polyphenolic-extract-from-green-tea-leaves-activates-fat-browning-in-high-fat-diet-induced-obese-mice
#10
Audrey M Neyrinck, Laure B Bindels, Lucie Geurts, Matthias Van Hul, Patrice D Cani, Nathalie M Delzenne
Fat browning has emerged as an attractive target for the treatment of obesity and related metabolic disorders. Its activation leads to increased energy expenditure and reduced adiposity, thus contributing to a better energy homeostasis. Green tea extracts (GTEs) were shown to attenuate obesity and low-grade inflammation and to induce the lipolytic pathway in the white adipose tissue (WAT) of mice fed a high-fat diet. The aim of the present study was to determine whether the antiobesity effect of an extract from green tea leaves was associated with the activation of browning in the WAT and/or the inhibition of whitening in the brown adipose tissue (BAT) in HF-diet induced obese mice...
July 24, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28859964/in-vitro-and-clinical-evaluation-of-optical-tooth-whitening-toothpastes
#11
Danying Tao, Jianing N Sun, Xiaojie Wang, Qiong Zhang, Mojgan A Naeeni, Carole J Philpotts, Andrew Joiner
OBJECTIVES: To measure tooth whitening effects delivered immediately after brushing with silica-based toothpastes containing either blue covarine or a combination of blue covarine and FD&C Blue No. 1 in vitro and in vivo. METHODS: Salivary pellicle coated human extracted teeth were brushed with either a slurry of a toothpaste containing blue covarine (BC) or a formulation containing a matched level of blue covarine and FD&C Blue No.1 (BC+D). The colour of the specimens were measured in vitro using a colorimeter, before and after brushing and changes in CIELAB and tooth Whiteness Index (WIO) values calculated...
August 28, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28846658/the-improvement-of-skin-whitening-of-phenylethyl-resorcinol-by-nanostructured-lipid-carriers
#12
Bo-Sik Kim, Young-Guk Na, Jae-Hwan Choi, Inhye Kim, Eunji Lee, Sung-Yeon Kim, Jae-Young Lee, Cheong-Weon Cho
Phenylethyl resorcinol (4-(1-phenylethyl)1,3-benzenediol) (PR) is a new whitening agent that has been found to have the ability to inhibit tyrosinase activity. However, the application of PR is limited by photo instability and poor solubility. PR-loaded nanostructured lipid carriers (PR-NLCs) were prepared by the hot-melted ultrasonic method. Glycerol monostearate and olive oil were selected as the solid lipid and liquid lipid for considering the solubility of PR in liquid lipid and partition coefficient of PR in solid lipid, respectively...
August 28, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28840865/diy-whitening
#13
A Omran
No abstract text is available yet for this article.
August 25, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28839918/a-second-inheritance-system-the-extension-of-biology-through-culture
#14
REVIEW
Andrew Whiten
By the mid-twentieth century (thus following the 'Modern Synthesis' in evolutionary biology), the behavioural sciences offered only the sketchy beginnings of a scientific literature documenting evidence for cultural inheritance in animals-the transmission of traditional behaviours via learning from others (social learning). By contrast, recent decades have seen a massive growth in the documentation of such cultural phenomena, driven by long-term field studies and complementary laboratory experiments. Here, I review the burgeoning scope of discoveries in this field, which increasingly suggest that this 'second inheritance system', built on the shoulders of the primary genetic inheritance system, occurs widely among vertebrates and possibly in invertebrates too...
October 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28837225/towards-image-quality-assessment-in-mammography-using-model-observers-detection-of-a-calcification-like-object
#15
Ramona W Bouwman, Alistair Mackenzie, Ruben E van Engen, Mireille J M Broeders, Kenneth C Young, David R Dance, Gerard J den Heeten, Wouter J H Veldkamp
PURPOSE: Model observers (MOs) are of interest in the field of medical imaging to asses image quality. However, before procedures using MOs can be proposed in quality control guidelines for mammography systems, we need to know whether MOs are sensitive to changes in image quality and correlations in background structure. Therefore, as a proof of principle, in this study human and model observer (MO) performance are compared for the detection of calcification like objects using different background structures and image quality levels of unprocessed mammography images...
August 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28831862/prunus-mume-extract-exerts-antioxidant-activities-and-suppressive-effect-of-melanogenesis-under-the-stimulation-by-alpha-melanocyte-stimulating-hormone-in-b16-f10-melanoma-cells
#16
KyungBae Pi, KiBeom Lee
In the current study, we examined the antioxidant and skin-whitening properties of Prunus mume extract (PME). The ability of PME to scavenge 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals was investigated in vitro. At a concentration of 1000 μg/mL, PME neutralized >45% free radical activity. Cell viability assessment with the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay revealed that at concentrations <1500 μg/mL, PME does not exert cytotoxic effects on murine B16 melanoma (B16) cells...
August 23, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28829933/effect-of-a-new-bleaching-gel-on-tooth-whitening
#17
T N Barry, C W Bailey, D Ashcraft-Olmscheid, K S Vandewalle
The purpose of this study was to compare the whitening efficacy of a novel bleaching agent containing a unique tribarrel hydremide-peroxide gel (KöR) with a traditional bleaching system of hydrogen peroxide or carbamide peroxide (Opalescence). Bovine incisors were mounted into a custom resin, arch-shaped mounting device. Four groups of 10 teeth were created using mounting devices containing five teeth each. The in-office and home bleaching gels of KöR and Opalescence were applied to the teeth alone and in trays to simulate a combination of in-office and home bleaching or home bleaching only...
September 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28826984/in-vitro-evaluation-of-a-silica-whitening-toothpaste-containing-blue-covarine-on-the-colour-of-teeth-containing-anterior-restoration-materials
#18
Carole J Philpotts, Eufemia Cariddi, Paul S Spradbery, Andrew Joiner
OBJECTIVES: To investigate the effects of a silica-based whitening toothpaste containing blue covarine on the colour of restorations in extracted human teeth. METHODS: Human extracted teeth were mounted in acrylic resin. A cavity was cut into the enamel surface and the specimen restored with either glass ionomer or composite dental materials. Following 4 weeks storage in water, specimens were treated with either water, red wine or a toothpaste containing blue covarine (n=10) for 24h followed by brushing with a silica-based toothpaste...
August 18, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28800901/dentifrices-specifically-formulated-for-tooth-whitening-reduce-extrinsic-tooth-surface-discoloration
#19
Tahira Devji
No abstract text is available yet for this article.
August 6, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28796288/a-novel-topical-agent-in-the-treatment-of-seborrheic-keratoses-a-proof-of-concept-study-by-clinical-and-dermoscopic-evaluation
#20
Francesco Lacarrubba, Maria Rita Nasca, Anna Elisa Verzì, Giuseppe Micali
In this proof of concept study, 50 lesions from 15 patients with multiple seborrheic keratoses (SKs) were treated with a novel aqueous solution containing nitric acid, zinc and copper salts, and organic acids (acetic, lactic, and oxalic acid). Treatment consisted in the application of an amount of the solution sufficient to obtain a whitening/yellowish reaction. Application of the nitric-zinc solution was performed every other week until clinical and dermoscopic clearance or crust formation, for a maximum of 4 applications...
August 10, 2017: Dermatologic Therapy
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