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Whitening teeth

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
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
Ghulam Zahara Jahangir, Durre Shahwar Ashraf, Idrees Ahmad Nasir, Madeha Sadiq, Sobia Shahzad, Farah Naz, Muhammad Iqbal, Afifa Saeed
The synthetic oral cleansing and teeth whitening products like mouthwashes exert adverse effects on teeth, gums and mucous membrane of oral cavity and their extensive use is being criticized. Determining the effect of frequent use of mouthwashes, human cheek cells and their DNA have been studied. Five mouthwash brands were tested and their effects were examined on membrane and DNA of human cheek cells which were found to be very expressive and severe. The DNA, also, received severe damage and breaks developed in its double stranded structure resulting in detachment of small fragments from DNA...
2016: SpringerPlus
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
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
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
R Lo Giudice, G Pantaleo, A Lizio, U Romeo, G Castiello, G Spagnuolo, G Lo Giudice
BACKGROUND: Auxiliary power sources (LED and laser) are used in in-office teeth bleaching techniques to accelerate the redox reaction of the whitening gel to increase ease of use, to improve comfort and safety, and to decrease the procedure time. OBJECTIVE: The aim this study is to evaluate the efficiency of the teeth whitening procedures performed with hydrogen peroxide and carbamide peroxide, LED or Laser activated. METHOD: 18 patients, affected by exogenous dyschromia, were treated with a bleaching agent composed by 35% hydrogen peroxide and 10% carbamide peroxide...
2016: Open Dentistry Journal
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
Kevin J Hanley
No abstract text is available yet for this article.
April 2016: New York State Dental Journal
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
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
Ghada A Maghaireh, Hanan Alzraikat, Nessrin A Taha
AIM: The aim of this study was to evaluate the factors influencing the satisfaction of dental appearance and attitude toward treatments to improve dental esthetics among patients attending a dental teaching center. METHODS: A questionnaire was used to collect data of four background variables among 450 patients attended a dental teaching center in the city of Irbid in Jordan. The questionnaire enclosed self-reported questions about the appearance of anterior teeth, received esthetic treatment and desired treatment for improving esthetics...
January 2016: Journal of Contemporary Dental Practice
So Ran Kwon, Deborah V Dawson, Philip W Wertz
OBJECTIVES: To establish time-course of potassium nitrate (PN) penetration into the pulp cavity, and determine whether PN pretreatment would affect whitening efficacy. MATERIALS AND METHODS: Extracted teeth (n = 100) were randomized into five groups of 20 specimens each. Relief ACP (Philips Oral Healthcare, Los Angeles, CA, USA) was applied for 0, 5, 15, 30, and 60 minutes for groups 15, respectively. A nitrate/nitrite assay kit was used for colorimetric detection of nitrate...
March 2016: Journal of Esthetic and Restorative Dentistry
Morgana Oliveira, Eduardo Fernández, Janaína Bortolatto, Osmir Oliveira Junior, Matheus Bandeca, Sharukh Khajotia, Fernando Florez
OBJECTIVE: Evaluate the immediate and cumulative optical whitening efficacy of a blue covarine toothpaste. MATERIALS AND METHODS: 180 bovine tooth specimens with similar shade (ΔE < 3.5) were staining of different beverage: black tea(BT), green tea (GT), red wine (RW), orange soda (OS), and brazilian açai juice (AJ), and then submitted to tooth brushing with a blue covarine toothpaste (Op) or a control abrasive toothpaste (Ab). The whitening effect was evaluated at baseline (B), after staining (S), after 1 day (1D) and 7 days of cumulative use of toothpastes (7D)...
March 2016: Journal of Esthetic and Restorative Dentistry
Janaina Freitas Bortolatto, Andrea Abi Rached Dantas, Ávery Roncolato, Hugo Merchan, Michael Christopher Floros, Milton Carlos Kuga, Osmir Batista de Oliveira Junior
The objective of this study was to analyze the effect of bleaching toothpastes, both conventional and those containing the new whitening agent Blue Covarine, on teeth previously bleached by conventional techniques (in-office and at-home). Squared bovine enamel/dentin blocks (6.0 x 6.0 x 2.0 mm) were randomly distributed in 6 groups (n = 15), according to the technique used to bleach them (in-office: HP35%; at-home: PC10%) and the type of bleaching toothpaste (none: control; Blue Covarine containing: BC; and without Blue Covarine: NBC)...
2016: Brazilian Oral Research
Tamara S Al-Karadaghi, Asmaa A Al-Saedi, Mohammed A Al-Maliky, Ali S Mahmood
This in vitro study aimed to investigate the whitening efficacy of 940 nm and 980 nm diode laser photoactivation in tooth bleaching by analysing pulp chamber temperature, as well as the change in tooth colour. Root canals of thirty extracted human lower premolars were prepared. Laserwhite* 20 bleaching agent containing 38% of hydrogen peroxide was photoactivated with 7 W output power of 940 nm and 980 nm diode lasers for 120 s. Bleaching gel reduced 27-29% of the temperature from reaching the pulp chamber...
December 2016: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
Silvina Limandri, Víctor Galván Josa, María Cecilia Valentinuzzi, María Emilia Chena, Gustavo Castellano
The enamel surfaces of fluorotic teeth were studied by scanning electron stereomicroscopy. Different whitening treatments were applied to 25 pieces to remove stains caused by fluorosis and their surfaces were characterized by stereomicroscopy in order to obtain functional and amplitude parameters. The topographic features resulting for each treatment were determined through these parameters. The results obtained show that the 3D reconstruction achieved from the SEM stereo pairs is a valuable potential alternative for the surface characterization of this kind of samples...
May 2016: Micron: the International Research and Review Journal for Microscopy
J Wei, Y Wang, Q Li
OBJECTIVE: This study aimed to explore the chemical changes and discoloration of endodontically treated teeth using spectroradiometric and chemical analyses. METHODS AND MATERIALS: Ten freshly extracted sound third molars and 10 discolored molars obtained after root canal treatment (RCT) were included in this study. Dentin blocks (3 × 3 × 1 mm) were prepared and treated with an intracoronal bleaching agent. Spectroradiometric evaluations, X-ray photoelectron spectroscopy (XPS), and attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) analyses were performed before and after bleaching...
July 2016: Operative Dentistry
Farzaneh Ahrari, Majid Akbari, Sakineh Mohammadpour, Maryam Forghani
AIMS: This study investigated the effectiveness of laser-assisted in-office bleaching and home-bleaching in sound and demineralized enamel. MATERIALS AND METHODS: The sample consisted of 120 freshly-extracted bovine incisors. Half of the specimens were stored in a demineralizing solution to induce white spot lesions. Following exposure to a tea solution for 7.5 days, the specimens were randomly assigned to 4 groups of 30 according to the type of enamel and the bleaching procedure employed...
December 30, 2015: Laser Therapy
F Y Abdelmegid
OBJECTIVE: The aim of this in vitro investigation was to measure shear bond strength (SBS) of a resin composite and a resin-modified glass ionomer to enamel of primary teeth after application of different whitening toothpastes (WTs). MATERIALS AND METHODS: Eighty labial enamel surfaces of primary incisors were randomly distributed into 8 groups of 10 each according to the surface treatment and bonding material. G1 and G2, control (brushed with water without WT); G3 and G4, (brushed with Colgate Optic White WT [Colgate-Palmolive Company, New York, NY, USA]), G5 and G6, (brushed with Crest Pro-Health Whitening WT [Procter and Gamble, Cincinnati, OH, USA]) and G7 and G8, (brushed with Arm and Hammer Advance White Extreme Whitening with Stain Defense WT [Church and Dwight Co...
March 2016: Nigerian Journal of Clinical Practice
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