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https://www.readbyqxmd.com/read/28149472/effect-of-tooth-bleaching-on-the-carbonate-concentration-in-dental-enamel-by-raman-spectroscopy
#1
Tatiana Vargas-Koudriavtsev, Óscar-Andrey Herrera-Sancho
BACKGROUND: There are not many studies evaluating the effects of surface treatments at the molecular level. The aim of this in vitro study was to analyze the concentration of carbonate molecules in dental enamel by Raman spectroscopy after the application of in-office and home whitening agents. MATERIAL AND METHODS: Sixty human teeth were randomly divided into six groups and exposed to three different home bleaching gels (Day White) and three in-office whitening agents (Zoom! Whitespeed and PolaOffice) according to the manufacturer´s instructions...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28149462/effect-of-bleaching-agents-on-enamel-surface-of-bovine-teeth-a-sem-study
#2
Ana-Cristina Pimenta-Dutra, Rodrigo-de Castro Albuquerque, Luís-Fernando-Dos Santos-Alves Morgan, Geraldo-Magela Pereira, Eduardo Nunes, Martinho-Campolina-Rebello Horta, Frank-Ferreira Silveira
BACKGROUND: This study aimed to evaluate changes in the enamel surface of bovine teeth after whitening with exogenous bleaching agents: 10% carbamide peroxide (group 1), 16% carbamide peroxide (group 2) and 35% hydrogen peroxide activated by a light-emitting diode (LED) (group 3). The evaluations were performed by scanning electron microscopy (SEM). MATERIAL AND METHODS: Ninety bovine teeth were divided into five groups (n = 18). The bleaching agents 10% and 16% carbamide peroxide were applied for eight hours a day for 14 consecutive days...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28116437/-study-of-the-effect-of-fluoride-removal-agent-and-microabrasion-technology-in-led-teeth-whitening-of-dental-fluorosis
#3
Yan Jia, Rong Zhang, Hong-Xia Luo, Ping Li, Chun-Lei Zhang
PURPOSE: To evaluate the effect of fluoride removal agent and microabrasion technology in LED teeth whitening of dental fluorosis. METHODS: One hundred and twelve patients with moderate dental fluorosis treated from August 2012 to July 2015 were divided into experimental group and control group according to random number table, with 61 cases in each group. In addition to pretreatment for all patients, patients in the control group were given combined treatment of Beyond LED whitening and fluoride removal agent; while patients in the experimental group were given microabrasion before LED whitening, with the same subsequent treatment process as that in the control group...
October 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28091877/influence-of-enamel-dentin-thickness-on-the-toxic-and-esthetic-effects-of-experimental-in-office-bleaching-protocols
#4
C C de Oliveira Duque, D G Soares, F G Basso, J Hebling, C A de Souza Costa
OBJECTIVES: This paper aims to assess the whitening effectiveness and toxicity of tooth-bleaching protocols applied to enamel/dentin disks simulating mandibular incisors (ICs) and premolars (PMs). MATERIALS AND METHODS: A 10% hydrogen peroxide (H2O2) gel was applied for 3 × 15, 1 × 15, or 1 × 5 min to enamel/dentin disks simulating mandibular ICs and PMs, and the trans-enamel and trans-dentinal diffusion products were applied to human dental pulp cells (1 h)...
January 14, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28068974/an-in-vitro-screening-assay-for-dental-stain-cleaning
#5
Changxiang Wang, Robert Lucas, Anthony J Smith, Paul R Cooper
BACKGROUND: The present study aimed to develop an in vitro model for stain removal from natural enamel for the assessment and comparison of oral hygiene products. METHODS: Bovine teeth (n = 8 per group) were ground/polished to provide flat enamel specimens and ferric-tannate deposits were precipitated onto the enamel surfaces. The ferric-tannate stained enamel specimens were brushed using an in vitro tooth-brushing simulator with slurries containing commercially available toothpaste products, dental abrasive particles, and sodium tripolyphosphate (STP) solutions of different concentrations...
January 9, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28068263/chemical-burn-to-the-gingiva-after-misuse-of-an-over-the-counter-oral-whitening-mouthwash
#6
John K Brooks
A well-recognized consequence of the use of tooth whitening gels and strips, particularly prescription strength formulations, is gingival irritation and tooth sensitivity. Limited information is available in the literature on the risk of gingival chemical burns associated with over-the-counter (OTC) oral whitening rinses. This case report details the development of gingival chemical burns consequent to misuse of a whitening rinse. The affected patient had rinsed for 30 seconds daily for 3-4 days but had failed to rinse with water after usage, as specified by the manufacturer...
January 2017: General Dentistry
https://www.readbyqxmd.com/read/27792268/in-office-bleaching-during-orthodontic-treatment
#7
Mauricio Neves Gomes, Hélio Dutra, Alexandre Morais, Ricardo Sgura, André Guaraci Devito-Moraes
OBJECTIVE: To demonstrate that it is possible to pursue teeth whitening treatment protocols during orthodontic treatment with no esthetic loss. CLINICAL CONSIDERATIONS: Many patients undergoing orthodontic treatment desire to have a straight and well aligned dentition, but also whiter teeth. For many years, it was believed that carrying out a whitening treatment with positioned orthodontic brackets in place would result in localized spots on the enamel labial surfaces of teeth...
October 28, 2016: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/27737352/effect-of-whitening-dentifrices-a-double-blind-randomized-controlled-trial
#8
RANDOMIZED CONTROLLED TRIAL
Karen Pintado-Palomino, Cecília Vilela Matias Vasconcelos, Roberto Juns da Silva, Andre Luiz de Macedo Fressatti, Bianka Jurca Gonçalves da Motta, Fernanda de Carvalho Panzeri Pires-DE-Souza, Camila Tirapelli
The aim of this clinical study was to evaluate tooth color changes (ΔE) and tooth sensitivity (TS) associated with whitening dentifrices. Sixty participants were selected according to inclusion and exclusion criteria and then allocated to three groups (n = 20): Colgate Luminous White (G1), Close Up White Now (G2) and Sorriso dentifrice (G3-control). The participants were instructed to use only the provided dentifrice and toothbrush in standardized oral hygiene procedures for 4 weeks. ΔE was assessed by spectrophotometry (CIELab System) whereas TS was determined by a visual analog scale at baseline and weekly using four assessment points...
October 10, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27723425/efficacy-of-home-use-bleaching-agents-delivered-in-customized-or-prefilled-disposable-trays-a-randomized-clinical-trial
#9
N R Carlos, E C Bridi, Flb Amaral, Fmg França, C P Turssi, R T Basting
The purpose of this study was to evaluate bleaching methods containing hydrogen peroxide (HP) or carbamide peroxide (CP), dispensed in customized or prefilled trays, in terms of color change, tooth sensitivity, gingival irritation, acceptance, and comfort. Seventy-five volunteers were randomly selected and distributed according to the whitening agent (n=25): 10% HP dispensed in prefilled trays (Opalescence Go 10%) and 9.5% HP (Pola Day) and 10% CP both delivered in customized trays (Opalescence PF 10%). HP was applied for 30 min/d for 14 days (d), and CP for 8 h/d for 14 days...
January 2017: Operative Dentistry
https://www.readbyqxmd.com/read/27649456/clinical-evaluation-of-genotoxicity-of-in-office-bleaching
#10
M Rezende, J L De Geus, A D Loguercio, A Reis, D Kossatz
OBJECTIVE: The aim of this study was to evaluate the genotoxicity of in-office bleaching with 35% hydrogen peroxide in epithelial cells from the gingival and lip tissues. METHODS AND MATERIALS: Thirty volunteers with central incisors shade A1 or darker were selected for this study. The gingival tissue of the teeth to be bleached was isolated with a light-polymerized resin dam, and the 35% hydrogen peroxide gel was administered during three 15-minute applications over the course of the 45-minute application period...
November 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27608553/brexit-implications-for-tooth-whitening
#11
R Yee, V Wong
No abstract text is available yet for this article.
September 9, 2016: British Dental Journal
https://www.readbyqxmd.com/read/27530080/evaluating-a-cobalt-tetraphenylporphyrin-complex-functionalized-with-a-reduced-graphene-oxide-nanocomposite-for-improved-tooth-whitening
#12
I-Hsuan Su, Chen-Fu Lee, Yu-Pin Su, Lai-Hao Wang
OBJECTIVES: To study using cobalt-tetraphenylporphyrin/reduced graphene oxide (CoTPP/RGO), a nanocomposite highly catalytic both for oxidizing and for reducing hydrogen peroxide (H2 O2 ), to whiten teeth. METHODS: Dyes (D&C Red 34, Orange No. 4), tea, and betel nuts (Areca catechu) were used to stain the tooth specimens for three days and subsequently bleached using H2 O2 alone, H2 O2 plus CoTPP, or H2 O2 plus CoTPP/RGO for 0.5-70 hours. The process was photographed using an electronic chromometer and a camera...
September 2016: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/27513289/the-effect-of-delivery-system-and-light-activation-on-tooth-whitening-efficacy-and-hydrogen-peroxide-penetration
#13
Soyoung Park, So Ran Kwon, Fang Qian, Philip W Wertz
PURPOSE: To evaluate the whitening efficacy of a new two-layer technology in-office system compared to a conventional gel-type system and determine hydrogen peroxide penetration (HPP) into the pulp cavity. MATERIALS AND METHODS: Extracted molars (n = 60) were assigned to group NC: glycerol gel; group QPRO: 20% HP varnish (Zoom Quick Pro, Philips Oral Healthcare); group ZOOM_NL: 25% HP gel (Zoom Chairside Whitening); and group ZOOM_WL: 25% HP gel (Zoom Chairside Whitening) with light-activation...
September 2016: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/27506134/on-the-permanence-of-tooth-bleaching
#14
Yacoub Al-Tarakemah, Brian W Darvell
OBJECTIVE: Bleaching (alias whitening) is increasingly the chosen means of modifying the appearance of teeth for cosmetic reasons. Behbehani et al. (2012) acquired the largest known data set for the effects of bleaching over time (300 patients for ∼1year), but the analysis then was rather superficial and did not exploit the full depth of information available in it. METHODS: Data collected by Behbehani et al. (2012) were re-analysed to explore in detail the variation in outcome between patients and over time...
October 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27473693/factors-affecting-the-quality-of-tooth-enamel-for-in-vivo-epr-based-retrospective-biodosimetry
#15
Céline M Desmet, Philippe Levêque, Bernard Gallez
In vivo electron paramagnetic resonance biodosimetry on tooth enamel is likely to be an important technology for triage of overexposed individuals after a major radiological incident. The accuracy and robustness of the technique relies on various properties of the enamel such as the geometry of the tooth, the presence of restorations, whitening treatments or exposition to sunlight. Those factors are reviewed, and their influence on dosimetry specifically for triage purposes is discussed.
December 2016: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/27352147/a-single-blind-randomized-trial-about-the-effect-of-hydrogen-peroxide-concentration-on-light-activated-bleaching
#16
A P Mena-Serrano, E Garcia, I Luque-Martinez, Rhm Grande, A D Loguercio, A Reis
OBJECTIVE: To compare the bleaching efficacy and tooth sensitivity (TS) of two hydrogen peroxide (HP) concentrations (20% and 35%) used for in-office bleaching associated or not with a light-emitting diode (LED)/laser light activation. METHOD: Seventy-seven patients with a right maxillary canine darker than A3 were selected for this single-blind randomized trial. The participants were distributed in four groups: bleaching with 35% HP, 35% HP + LED/laser, 20% HP, and 20% HP + LED/laser...
June 28, 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27290611/comparison-of-efficacy-of-tray-delivered-carbamide-and-hydrogen-peroxide-for-at-home-bleaching-a-systematic-review-and-meta-analysis
#17
REVIEW
Issis Luque-Martinez, Alessandra Reis, Marcos Schroeder, Miguel Angel Muñoz, Alessandro D Loguercio, Danielle Masterson, Lucianne C Maia
OBJECTIVES: The aim of the study was to compare the color change produced by tray-delivered carbamide peroxide [CP] versus hydrogen peroxide products [HP] for at-home bleaching through a systematic review and meta-analysis. MATERIALS AND METHODS: MEDLINE via PubMeb, Scopus, Web of Science, Latin American and Caribbean Health Sciences Literature database (LILACS), Brazilian Library in Dentistry (BBO), and Cochrane Library and Grey literature were searched without restrictions...
September 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27206915/effect-of-enamel-sealants-on-tooth-bleaching-and-on-the-color-stability-of-the-result
#18
N Corcodel, A J Hassel, S Sen, D Saure, P Rammelsberg, C J Lux, S Zingler
The purpose of this in vitro study was to evaluate the effect of enamel sealants on bleaching of natural teeth by use of 40 % hydrogen peroxide in a dental surgery. The color stability of the results from bleaching was, furthermore, determined 10 months after the bleaching procedure. In a standardized setting, four sealants (Pro Seal(®), Light Bond™ Sealant, Protecto(®), and Clinpro™ XT Varnish) were applied to and removed from human teeth in accordance with the manufacturer's instructions. Natural teeth served as medium; half of the teeth were sealed and the others served as controls...
May 20, 2016: Odontology
https://www.readbyqxmd.com/read/27197087/enamel-alteration-following-tooth-bleaching-and-remineralization
#19
Emilija Coceska, Elizabeta Gjorgievska, Nichola J Coleman, Dragana Gabric, Ian J Slipper, Marija Stevanovic, John W Nicholson
The purpose of this study was to compare the effects of professional tooth whitening agents containing highly concentrated hydrogen peroxide (with and without laser activation), on the enamel surface; and the potential of four different toothpastes to remineralize any alterations. The study was performed on 50 human molars, divided in two groups: treated with Opalescence(®) Boost and Mirawhite(®) Laser Bleaching. Furthermore, each group was divided into five subgroups, a control one and 4 subgroups remineralized with: Mirasensitive(®) hap+, Mirawhite(®) Gelleѐ, GC Tooth Mousse™ and Mirafluor(®) C...
June 2016: Journal of Microscopy
https://www.readbyqxmd.com/read/27134991/effect-of-whitening-dentifrice-on-micro-hardness-colour-stability-and-surface-roughness-of-aesthetic-restorative-materials
#20
K B Roopa, N Basappa, A R Prabhakar, O S Raju, Gagandeep Lamba
INTRODUCTION: Whitening agents present in the novel whitening dentifrices may have deleterious effects over the aesthetic restorations. AIM: The present study evaluated the invitro effect of whitening dentifrice on micro hardness, colour stability and surface roughness on aesthetic restorative materials. MATERIALS AND METHODS: Forty specimens each of compomer and of composite were prepared using brass mould. Specimens were equally divided into 4 groups...
March 2016: Journal of Clinical and Diagnostic Research: JCDR
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