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https://www.readbyqxmd.com/read/29296113/effect-of-different-types-of-toothpaste-on-the-frictional-resistance-between-orthodontic-stainless-steel-brackets-and-wires
#1
Tahereh Hosseinzadeh Nik, Tabassom Hooshmand, Homa Farhadifard
Objectives: The purpose of this study was to investigate the effect of different types of toothpaste on the frictional resistance between stainless steel brackets and archwires. Materials and Methods: Ninety stainless steel orthodontic brackets with stainless steel wires were bonded to bovine teeth and were divided into 6 groups for application of the following toothpastes: Colgate® Total® Advanced Whitening, Colgate® Total® Pro Gum Health, Colgate® Anticavity, Ortho...
September 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29279667/shade-changing-effectiveness-of-plasdone-and-blue-covarine-based-whitening-toothpaste-on-teeth-stained-with-chlorhexidine-and-black-tea
#2
Vania Bergesch, Flávio Henrique Baggio Aguiar, Cecilia Pedroso Turssi, Fabiana Mantovani Gomes França, Roberta Tarkany Basting, Flávia Lucisano Botelho Amaral
Objective: This study evaluated the effectiveness of toothbrushing with whitening toothpaste in altering the shade of stained human enamel. Materials and Methods: Thirty fragments of human enamel, stained with chlorhexidine/black tea underwent 1000 and 5000 brushing cycles (BC) with (n = 10): PLS (Gel Dental Day, Bitufo), Close Up White Now, Unilever (COVB) and regular (Gel Dental Night, Bitufo) toothpaste. Images were taken before staining (baseline), after staining (STN) and following 1000 and 5000 BC and were analyzed using the CIELAB parameters (ΔE, Δb and ΔL)...
October 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/29233260/tooth-whitening-evaluation-of-blue-covarine-containing-toothpastes
#3
Danying Tao, Richard N Smith, Qiong Zhang, Jianing N Sun, Carole J Philpotts, Stephen R Ricketts, Mojgan Naeeni, Andrew Joiner
OBJECTIVES: To measure the tooth whitening effects delivered immediately after brushing with silica-based toothpastes containing blue covarine 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), a formulation containing an increased level of blue covarine (BC+) or a negative control toothpaste containing no blue covarine. The colour of the specimens were measured in vitro using either a Minolta chromameter or a VITA Easyshade spectrophotometer, before and after brushing and changes in CIELAB values and tooth Whiteness Index (WIO) values calculated...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29233258/investigation-of-the-perceptual-thresholds-of-tooth-whiteness
#4
Stephen Westland, Wen Luo, Yuan Li, Qianqian Pan, Andrew Joiner
OBJECTIVE: To investigate the tooth whiteness perceptibility thresholds of the average observer to changes in the CIELAB values and an optimised whiteness Index for dentistry (WIO) based on psychophysical studies. METHODS: A psychophysical experiment based on visual assessments of digital images of teeth on a calibrated display with a group of observers (n=32) has been conducted to determine the perceptual thresholds in tooth whiteness. Digital simulations of a tooth that is identical in shape to the left incisor in the image of teeth were superimposed on to images...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29178728/a-randomized-clinical-study-to-evaluate-the-effect-of-an-ultra-low-abrasivity-dentifrice-on-extrinsic-dental-stain
#5
Sarah Young, Stephen Mason, Jeffery L Milleman, Kimberly R Milleman
PURPOSE: To investigate the stain-removal efficacy of an experimental ultra-low abrasivity anti-sensitivity dentifrice containing sodium tripolyphosphate (STP) and a cocamidopropyl betaine/sodium methyl cocoyl taurate detergent system. METHODS: This was a single-center, examiner-blind, randomized, parallel-group study. Extrinsic dental stain was assessed on the facial surfaces of the six maxillary and six mandibular anterior teeth and the lingual surfaces of the six mandibular anterior teeth using the Macpherson modification of the Lobene Stain Index (MLSI)...
October 2017: American Journal of Dentistry
https://www.readbyqxmd.com/read/29169307/adult-orthodontics-in-the-republic-of-ireland-specialist-orthodontists-opinions
#6
Siobhán Mary McMorrow, Declan T Millett
OBJECTIVES: To report the opinions of specialist orthodontists regarding the profile, characteristics and treatment of adults currently undergoing orthodontic treatment in the Republic of Ireland (ROI) Design/setting: A national cross-sectional questionnaire study in the ROI. METHOD: A pilot-tested questionnaire was distributed to 122 specialist orthodontists in the ROI. Questions addressed general and treatment information for current adult orthodontic patients...
November 24, 2017: Journal of Orthodontics
https://www.readbyqxmd.com/read/29144879/effectiveness-and-impact-of-the-walking-bleach-technique-on-esthetic-self-perception-and-psychosocial-factors-a-randomized-double-blind-clinical-trial
#7
C Bersezio, J Martin, F Peña, M Rubio, J Estay, R Vernal, Ob Oliveira Junior, E Fernández
OBJECTIVE: This trial evaluates the impact of psychosocial and esthetic self-perceptions of patients undergoing nonvital tooth bleaching using the walking bleach technique. We also assessed the clinical effectiveness of bleaching tooth discoloration. METHODS: Fifty volunteers with nonvital tooth discoloration were enrolled. Teeth were randomized into two groups: 35% hydrogen peroxide (n=25) and 37% carbamide peroxide (n=25). Intracoronal bleaching was performed over four sessions using the walking bleach technique...
November 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29130776/new-insights-into-effects-of-aromatic-amino-acids-on-hydroxyapatite
#8
Y R Guo, X Yang, X W Feng, Y Sa, M Wang, P Li, T Jiang
Biomimetics inspired by superstructures and extraordinary properties of teeth have resulted in tooth repair and the generation of novel materials. However, little attention has been paid to tooth color, whose origin remains unknown. Based on recent studies, fluorophores-mainly aromatic amino acids (AAAs) in proteins-might be responsible for tooth color. We synthesized carbonated hydroxyapatite (HA; the mineral phase of teeth) in the presence of different amino acids (AAs; the basic units of protein matrix of teeth) as a simplified model of teeth to explore the color source at the AA level...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29125909/calcium-phosphate-microspheres-as-a-delivery-vehicle-for-tooth-bleaching-agents
#9
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/29123632/management-of-post-endodontic-retreatment-pain-with-low-level-laser-therapy
#10
Mohammad Asnaashari, Hengameh Ashraf, Amir Houshang Daghayeghi, Seyed Masoud Mojahedi, Saranaz Azari-Marhabi
Introduction: Pharmacotherapy with analgesics and non-steroidal anti-inflammatory drugs has been traditionally used to relief post-operative pain of endodontic treatments. However, due to the side effects reported for these drugs, some efforts have been made to decrease the post-operative pain of the endodontic treatments through laser irradiation. The present study aimed to evaluate the effects of low level laser therapy (LLLT) on the reduction of pain after root canal retreatment. Methods: In this clinical trial, 61 patients requiring endodontic retreatments in posterior teeth were selected...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29109310/in-situ-effect-of-nanohydroxyapatite-paste-in-enamel-teeth-bleaching
#11
Yasmin Sb de Lima Gomes, Larissa D Alexandrino, Cristiane de M Alencar, Eliane B Alves, Kelson Cf Faial, Cecy M Silva
AIM: Evaluate in situ the effect of nanohydroxyapatite paste (nano-HAP) before bleaching with hydrogen peroxide 35% (HP35%) by ion chromatography (IC) Knoop hardness number (KHN) and tristimulus colorimetry (TC). MATERIALS AND METHODS: A total of 60 fragments were obtained from third molars included (3 mm × 3 mm × 3 mm) and the specimens were divided into three groups (n = 20): Gas chromatography (CG) (negative control group) = no bleaching; HP35% (positive control group) = HP35% whitening (whiteness HP35%); nano-HAP = application for 10 minutes before bleaching treatment + HP35%...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29069156/effectiveness-of-a-new-non-hydrogen-peroxide-bleaching-agent-after-single-use-a-double-blind-placebo-controlled-short-term-study
#12
Mozhgan Bizhang, Julia Domin, Gholamreza Danesh, Stefan Zimmer
INTRODUCTION: Tooth whitening represents perhaps the most common aesthetic procedure in dentistry worldwide. The efficacy of bleaching depends on three aspects: bleaching agent, bleaching method, and tooth color. OBJECTIVE: This in vivo study aimed to examine whitening effects on frontal teeth of the upper and lower jaws using an over-the-counter (OTC) non-hydrogen peroxide bleaching agent in comparison to a placebo after one single use. MATERIAL AND METHODS: Forty subjects (25 female; 15 male) participated in this double-blind randomized placebo-controlled trial...
September 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29036235/-medicaments-and-oral-healthcare-5-adverse-effects-of-medications-and-over-the-counter-drugs-on-teeth
#13
C de Baat, P G M A Zweers, C van Loveren, A Vissink
Intrinsic tooth discoloration may occur as an adverse effect of fluoride and tetracyclines. Extrinsic tooth discoloration may occur as superficial staining or as discoloration of the superficial pellicle and/or biofilm due to chlorhexidine, liquid iron salts, essential oils, some antibiotics and stannous fluoride. Inhibition of orthodontic tooth movement has been reported due to the use of prostaglandin synthetase inhibitors. If medications or over-the-counter drugs induce hyposalivation or contain much sucrose, caries may develop...
October 2017: Nederlands Tijdschrift Voor Tandheelkunde
https://www.readbyqxmd.com/read/28932242/analysis-of-the-chemical-modification-of-dental-enamel-submitted-to-35-hydrogen-peroxide-in-office-whitening-with-or-without-calcium
#14
Rudá França Moreira, Fábio Pinheiro Santos, Estevão Antero Santos, Ramon Silva Dos Santos, Marcelino José Dos Anjos, Mauro Sayão de Miranda
PURPOSE: The purpose of this study was to evaluate changes in calcium and phosphorus content in dental enamel when subjected to "in-office" whitening for an extended time by using a 35% hydrogen peroxide solution, with and without calcium. MATERIALS AND METHODS: 10 human teeth, from which the roots had been removed, were embedded in epoxy resin, and their surfaces were smoothed. The specimens were divided into two groups; in group 1, a whitening solution without calcium was used, while in group 2, the solution included calcium...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28928097/tooth-colour-and-whiteness-a-review
#15
Andrew Joiner, Wen Luo
OBJECTIVES: To review current knowledge concerning the application of colour science on tooth colour and whiteness description, measurement, distribution and its psychological impact. DATA SOURCES: "Scopus" databases were searched electronically with the principal keywords tooth, teeth, colour, white, whiteness. Language was restricted to English and original studies and reviews were included. Conference papers and abstracts were excluded. CONCLUSIONS: The appearance and colour of teeth is a common concern for patients across many populations and is associated with an increased desire for treatments that improve dental aesthetics, including tooth whitening...
September 16, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28859964/in-vitro-and-clinical-evaluation-of-optical-tooth-whitening-toothpastes
#16
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 30, 2017: Journal of Dentistry
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 19, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28734081/whitening-dependent-changes-of-fluorescence-of-extracted-human-teeth
#19
Natalie Pereira Sanchez, Aleksandar Aleksic, Miroslav Dramicanin, Rade D Paravina
OBJECTIVE: To evaluate in vitro the fluorescence properties of extracted human teeth whitened with 40% hydrogen peroxide. MATERIALS AND METHODS: A total of 28 extracted human teeth were pumiced for 1 minute using a low-speed dental handpiece and a disposable rubber cup. Pre-whitening fluorescence measurements (T0), maximum excitation (Exmax ), maximum emission (Emmax ), and maximum intensity (Imax 10(8) ), were performed using a spectrofluorometer. After T0 measurements, the teeth were whitened using the in-office method with 40% hydrogen peroxide, three times for 20 minutes...
July 22, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28713111/effect-of-hydrogen-and-carbamide-peroxide-in-bleaching-enamel-morphology-and-mineral-composition-in-vitro-study
#20
Carmen Llena, Irene Esteve, Leopoldo Forner
AIM: The aim of the study was to evaluate the bleaching effect, morphological changes, and variations in calcium (Ca) and phosphate (P) in the enamel with hydrogen peroxide (HP) and carbamide peroxide (CP) after the use of different application regimens. MATERIALS AND METHODS: Four groups of five teeth were randomly assigned, according to the treatment protocol: HP 37.5% applied for 30 or 60 minutes (HP30, HP60), CP 16% applied for 14 or 28 hours (CP14, CP28). Changes in dental color were evaluated, according to the following formula: ΔE = [(La-Lb)(2)+(aa-ab)(2) + (ba-bb)(2)](1/2)...
July 1, 2017: Journal of Contemporary Dental Practice
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