Clinical efficiency of a sodium perborate - hydrogen peroxide mixture for intracoronal non-vital teeth bleaching

Introduction/Objective. The aim was to evaluate initial efficiency of sodium perborate (tetrahydrate) and 30% hydrogen peroxide mixture for intracoronal non-vital teeth bleaching (?walking bleach? technique). Methods. Forty patients with discolored teeth were included in the study. Based on their history and clinical examination, causes of discoloration were classified as necrotic pulp, ?endo-sealer? or unknown. The ?walking bleach? technique was performed by applying sodium perborate (tetrahydrate) and 30% hydrogen peroxide mixture intracoronally to cavity dentin walls. The mixture was renewed in seven-day intervals. Tooth color was assessed visually before, during, and after the procedure using the Vita Classical shade guide (Vita Zahnfabrik, Bad Sackingen, Germany). Numerical values or shade guide units (SGU) were assigned to Vita shade tabs on a bright-dark scale. Analysis of variance, t-test, correlation and regression analysis were used to analyze the data (p < 0.05). Results. On average, 26 ? 9 days or 3?4 appointments were required for intracoronal bleaching to achieve the desired or best possible shade. Better clinical efficiency was found in the necrotic pulp group (17 ? 6 days; 8 ? 3 SGU) than in the ?endo-sealer? group (42 ? 13 days; 4 ? 2 SGU) (p < 0.05). Age significantly influenced bleaching efficiency (p < 0.05). There was no significant correlation between bleaching efficiency and initial shade (p > 0.05). Conclusion. Intracoronal, non-vital teeth bleaching (?walking bleach? technique) using sodium perborate (tetrahydrate) and 30% hydrogen peroxide mixture showed satisfactory clinical efficiency. Discoloration caused by pulp necrosis was treated more efficiently than that caused by endodontic sealers. Younger age had a positive effect and discoloration intensity had no effect on bleaching efficiency.

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Combination of at-home and in-office bleaching techniques: case series

RGO - Revista Gaúcha de Odontologia ◽

10.1590/1981-863720200003620190149 ◽

2021 ◽

Vol 69 ◽

Author(s):

Marcela Alvarez FERRETTI ◽

Matheus KURY ◽

Beatriz Curvello de MENDONÇA ◽

Marcelo GIANNINI ◽

Vanessa CAVALLI ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Case Series ◽

Tooth Bleaching ◽

Central Incisor ◽

Carbamide Peroxide ◽

Tooth Sensitivity ◽

Tooth Color ◽

Shade Guide ◽

At Home

ABSTRACT Tooth bleaching is one of the most conservative aesthetic techniques. At-home and in-office bleaching may be performed, as well as the combination of both techniques. As this combination may be done in different manners, distinct orders of combinations were proposed in this report. A 24 years-old man, whose upper central incisor and canine shades were A2 and A3 respectively, was initially treated by chair-side with 40-min application of 40% hydrogen peroxide (HP) for two sessions. Afterwards, an two-week overnight at-home bleaching was performed with 10% carbamide peroxide (CP). The shade of upper central incisors changed to 1M1 and canine was B1. Conversely, a 30 years-old woman was firstly conducted with at-home bleaching (overnight 4-weeks 10% CP) and, subsequently, with a single appointment of in-office bleaching for 45 minutes (35% HP). The shade of her upper central incisor changed from A1 to 0.5M1 and the upper canine from A3 to B1. The VITA classical (A1-D4) shade guide and VITA Bleached guide 3D-MASTER were used to determine the tooth color during the treatments. In both bleaching treatments, patients reported no significant tooth sensitivity and the final outcomes met their expectation.

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In-Office Tooth Bleaching for Adolescents Using Hydrogen Peroxide-Based Gels: Clinical Trial

Brazilian Dental Journal ◽

10.1590/0103-6440201701516 ◽

2017 ◽

Vol 28 (6) ◽

pp. 720-725 ◽

Cited By ~ 4

Author(s):

Marcela Leticia Leal Gonçalves ◽

Antonio Carlos da Silva Tavares ◽

Ana Carolina Costa da Mota ◽

Luiz Alberto Plácido Penna ◽

Alessandro Melo Deana ◽

...

Keyword(s):

Clinical Trial ◽

Hydrogen Peroxide ◽

Statistical Significance ◽

Young Patients ◽

Tooth Bleaching ◽

Controlled Clinical Trial ◽

Tooth Sensitivity ◽

Tooth Color ◽

Bleaching Procedure ◽

Shade Guide

Abstract The aim of the present study was to evaluate colorimetric changes and tooth sensitivity in adolescents and young patients submitted to tooth bleaching with 20% and 35% hydrogen peroxide. A randomized, controlled, clinical trial was conducted with 53 patients aged 11 to 24 years who were allocated to groups based on the use of the following commercial products: Whiteness HP - FGM® (35% hydrogen peroxide); Whiteness HP Blue Calcium - FGM® (35% hydrogen peroxide); and Whiteness HP Blue Calcium - FGM® (20% hydrogen peroxide). After the bleaching procedure, the visual analog scale was used to measure tooth sensitivity and the Vita Classical Shade guide was used to determine changes in tooth color. Statistical analysis involved the Friedman, Kruskal-Wallis and Student-Newman-Keuls tests, with p≤0.05 considered indicative of statistical significance. The addition of calcium contributed to a reduction in tooth sensitivity, especially when the lower concentration of hydrogen peroxide (20%) was used. Tooth sensitivity occurred in a transitory way and did not influence the tooth bleaching process. Significant differences in color were found after each of the two bleaching sessions. In-office tooth bleaching was considered an effective method for adolescents and young adults. Further studies in this population are necessary in order to fully evaluate the effects of bleaching in young teeth.

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Evaluation of the effectiveness of skin preparation methods for the reduction of Cutibacterium acnes (formerly Propionibacterium acnes) in shoulder surgery: a systematic review

Shoulder & Elbow ◽

10.1177/17585732211032523 ◽

2021 ◽

pp. 175857322110325

Author(s):

Maria Sagkrioti ◽

Stephen Glass ◽

Georgios Arealis

Keyword(s):

Systematic Review ◽

Hydrogen Peroxide ◽

Side Effects ◽

Cost Effective ◽

Shoulder Surgery ◽

Skin Preparation ◽

Preparation Methods ◽

Cutibacterium Acnes ◽

Surgery Outcomes ◽

Positive Effect

Background Cutibacterium acnes ( C. acnes) is the most common pathogen responsible for post-operative shoulder infections. The purpose of this study was to evaluate the effectiveness of skin preparation methods against C. acnes in shoulder surgery. Methods A systematic review was conducted evaluating the effectiveness of skin preparation methods in the reduction of C. acnes in patients undergoing shoulder surgery. Outcomes were assessed based on the effectiveness of the method used; side effects and cost were also analysed. Results Of the 19 included studies, 9 evaluated pre-surgical home treatments: 8 assessed benzoyl peroxide (BPO) and 6 concluded it is effective in reducing C. acnes. Nine studies assessed surgical skin preparation and concluded that Chlorhexidine gluconate (CHG) was not effective; in contrast hydrogen peroxide reduced C. acnes. Finally, one study evaluated an aseptic protocol using CHG and concluded that it was not effective. Conclusions It was demonstrated that BPO as home treatment is effective in reducing C. acnes load on skin ; it rarely causes side effects and is also cost-effective. This study highlights non-effectiveness of CHG. There was some evidence that the addition of hydrogen peroxide could have a positive effect in the reduction of C. acnes skin load; however, more studies are required.

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Aferição do pH de diferentes agentes clareadores indicados para o clareamento intracoronário

Clinical and Laboratorial Research in Dentistry ◽

10.11606/issn.2357-8041.clrd.2018.143185 ◽

2018 ◽

Author(s):

João Felipe Besegato ◽

Gabriela Dos Santos Ribeiro Rocha ◽

Marlene De Sousa Amorim ◽

Fabio Martins Salomão ◽

Daniel Poletto ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Statistical Analysis ◽

Multiple Comparisons ◽

The Other ◽

Sodium Perborate ◽

Distilled Water ◽

Friedman Test ◽

Time Intervals ◽

Ph Values ◽

Evaluation Time

Objective: to measure pH values of bleaching agents that are indicated to intracoronal bleaching technique in different time intervals. Methods: Each group (G) received five samples (n=5): G1 – distilled water (AD); G2 – hydrogen peroxide (H2O2) 30%; G3 – sodium perborate (PbS) + AD; G4 – PbS + H2O2 30%; G5 – sodium percarbonate (PcS) + AD; and G6 – PcS + H2O2 30%. pH values were stated using a digital pHmeter, in different time intervals: immediately after handling (T0), 24 hours (T1) and 168 hours after handling (T2). The results were submitted to statistical analysis through Kruskal-Wallis and Mann Whitney tests, in this order, allowing multiple comparisons among the groups. To verify the effect of time in each group, Friedman test was applied. Results: In the evaluation of the effect of time in each group, it was observed that G2 presented acid behavior, while the other groups exhibited values close to neutrality or alkaline. Conclusions: H2O2 30% was the only agent that showed acidic behavior in every evaluation time. Meanwhile, PcS + H2O had the highest pH values.

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TOPLAM KALİTE YÖNETİMİNİN İŞGÖREN PERFORMANSINA ETKİLERİ: TEKSTİL İŞLETMELERİ ÜZERİNE BİR ARAŞTIRMA

Business And Management Studies An International Journal ◽

10.15295/v6i3.385 ◽

2018 ◽

Vol 6 (3) ◽

Author(s):

Ergün KARA

Keyword(s):

Quality Management ◽

Total Quality Management ◽

Total Quality ◽

Economic Gain ◽

Face To Face ◽

Correlation And Regression Analysis ◽

Career Opportunities ◽

Personal Skills ◽

Positive Effect ◽

Textile Sector

Total quality management is a management perception which has to increase quality and productivity in managements of all opportunities mobilised systematically to provide client satisfaction. To reach success in total quality management (TQM) perception depends on various reasons so satisfying the employees' request and expectations is quite essential for this success. For this reason, providing increase of the employees' economic income in management gain parallel, increasing their motivation, presenting career opportunities to prove themselves, taking performance increase precautions and using awarding systems are necessary factors for TQM success. The effect of total quality management which is practised in the sectors such as textile sector especially which requires employees' personal skills was researched on the basic factors which affects employees' performance. The research was done by face to face technique with 275 staff working in textile managements in Bursa province. In the conclusion of correlation and regression analysis, it was determined that total quality management has a positive effect on the employees' economic gain and motivation.

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Bleaching Process Investigation of Tunisian Dromedary Hair

ISRN Textiles ◽

10.1155/2013/532396 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

T. Harizi ◽

S. Dhouib ◽

S. Msahli ◽

F. Sakli

Keyword(s):

Mechanical Properties ◽

Hydrogen Peroxide ◽

Adverse Effects ◽

Oxalic Acid ◽

Review Of The Literature ◽

Bleaching Process ◽

Bleaching Efficiency

Successful bleaching of pigmented fibres was, generally, evaluated by a maximum whiteness, a minimum yellowness, and less damage to the bleached fibers. A review of the literature reveals that many studies on pigmented fibre bleaching are concerned with improving the whiteness and mechanical properties of bleached fibres. In this study, we investigate the effects of the hydrogen peroxide concentration, bleaching time, and clarification bath on the bleaching efficiency of Tunisian dromedary hair. It was showed that 30 min bleaching time gives better result in term of whiteness. However, an increased bleaching time gives an excessive damage to the bleached fibers. Further, the damage incurred by the dromedary hair was more important than that for wool, as is shown by the tenacity results. We found that oxalic acid, which is used for rinsing dromedary hair (after bleaching), provides improved results in term of whiteness obtained with bleaching. Certainly, oxalic acid made it possible to remove the maximum of iron remaining on fibre after bleaching. Bleaching methods demonstrate the excessive damage incurred by the fibre when using hydrogen peroxide particularly with raise concentration. This damage leads to adverse effects on the tenacity fibre.

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Hydrogen Peroxide Might Bleach Natural Dentin by Oxidizing Phosphoprotein

Journal of Dental Research ◽

10.1177/0022034518784260 ◽

2018 ◽

Vol 97 (12) ◽

pp. 1339-1345 ◽

Cited By ~ 5

Author(s):

T. Jiang ◽

Y.R. Guo ◽

X.W. Feng ◽

Y. Sa ◽

X. Yang ◽

...

Keyword(s):

Amino Acids ◽

Hydrogen Peroxide ◽

Acetic Acid ◽

Aromatic Amino Acids ◽

Disodium Salt ◽

Tooth Bleaching ◽

Distilled Water ◽

Fluorescent Properties ◽

Fluorescent Intensity ◽

Tooth Color

Recent studies suggested that bleaching agents may whiten teeth by oxidizing the fluorescent materials, which are the proteins located in the organic-inorganic interface. Therefore, we postulated that fluorescence of dentin came from dentin phosphoprotein (DPP) and that bleaching agents might bleach dentin by oxidizing DPP. Fifty-six specimens were randomly divided into 4 groups and exposed to distilled water, hydrogen peroxide (HP), ethylenediamine tetraacetic acid disodium salt (EDTA), and acetic acid for 24 h. After measuring the organic and inorganic components, fluorescence, and color characteristics of dentin before and after exposure, we found that when DPP was removed from dentin by EDTA, fluorescent intensity declined proportionally with the reduction in Raman relative intensity, and dentin was whitened considerably, with an Δ E value 6 times higher than that of the distilled water group. On the contrary, due to the incapability of acetic acid to dissolve DPP during decalcification, fluorescent intensity values and tooth color remained nearly unchanged after exposure to acetic acid. Dentin exposed to neutral HP showed no obvious morphologic and organic/inorganic component changes except for the destruction of DPP. Similarly, dramatically decreased fluorescent intensity and lightened color were found in the HP group. Moreover, DPP solution of the HP group exhibited decreased ultraviolet absorbance, especially between 250 and 300 nm, which arose from aromatic amino acids. The results indicated that DPP was responsible for the fluorescent properties of dentin and that HP might bleach dentin by the oxidization of aromatic amino acids in DPP. These findings are of great significance in promoting our further understanding of the mechanism of tooth bleaching and the fluorescent property of normal dentin.

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An in-vitro Comparison of the Bleaching Efficacy of 35 Percent Carbamide Peroxide with Established Intracoronal Bleaching Agents

Journal of Dentistry and Oral Sciences ◽

10.37191/mapsci-2582-3736-3(1)-062 ◽

2020 ◽

Author(s):

Nandita Bansal

Keyword(s):

Hydrogen Peroxide ◽

Sodium Perborate ◽

Distilled Water ◽

Carbamide Peroxide ◽

Human Teeth ◽

Anterior Teeth ◽

Group I ◽

Group Ii ◽

Control Evaluation

Introduction: Intracoronal bleaching is the simplest, least invasive, and least expensive means available to lighten non-vital discolored teeth. The objective of the study: To evaluate the intra coronal bleaching efficacy of 35% Carbamide peroxide relative to 35% Hydrogen peroxide and Sodium perborate using artificially stained extracted human teeth. Materials and Methods: Eighty extracted human permanent maxillary and mandibular anterior teeth and single-rooted premolars were artificially stained using whole human blood and root canal treatment was completed. They were bleached twice 7 days apart using: Group I (n=20) – 35% Carbamide peroxide gel, Group II (n=20) – 35% Hydrogen peroxide gel, Group III (n=20) – 2 gm Sodium perborate mixed with per ml of distilled water, Group IV (n=20)– Distilled water only (control). Evaluation of shade was performed on day 0,7,14. Results: On day 7, In Groups I and Group II, there was a reduction in the shade by 2 vita tab positions, whereas Group IIIlightened by 1-tab position only. On day 14, CP and HP lightened by overall 3-tab positions and SP by 2-tab positions. There were no statistical differences between the groups on day 7 and day 14. Conclusion: 35% Carbamide peroxide, 35% Hydrogen peroxide and Sodiumperborate were equally effective for Intra coronal bleaching.

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Removal of color substances using photocatalytic oxidation for membrane filtration processes

Water Science & Technology ◽

10.2166/wst.2001.0651 ◽

2001 ◽

Vol 43 (10) ◽

pp. 319-325 ◽

Cited By ~ 13

Author(s):

J. H. Tay ◽

D. Chen ◽

D. D. Sun

Keyword(s):

Hydrogen Peroxide ◽

Membrane Filtration ◽

Photocatalytic Oxidation ◽

Removal Rate ◽

Membrane Surface ◽

Rejection Rate ◽

Solution Treated ◽

Low Concentrations ◽

Photo Catalytic Oxidation ◽

Positive Effect

This study aims to remove the color substances, which normally cause difficulties in membrane filtration processes due to fouling using heterogeneous UV/TiO2/H2O2 reactor. It is confirmed that the technique used in this study was effective to remove TOC at 38% and color400 at 89% within 150-min irradiation. The experiment results showed that low concentrations of hydrogen peroxide dosage (less than 0.016 M) to UV/TiO2 system accelerated the TOC and Color400 removal rate from 9% to 38% and 40% to 89% respectively, while over-dosage made this positive effect decline. The humic acid solution treated by photo catalytic oxidation in UV/TiO2/H2O2 reactor did not change the zeta potential on membrane surface and membrane rejection rate.

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A literature review to investigate the link between psychosocial characteristics and treatment adherence in cancer patients

Oncology Reviews ◽

10.4081/oncol.2012.e5 ◽

2012 ◽

Vol 6 (1) ◽

pp. 5 ◽

Cited By ~ 8

Author(s):

Paraskevi Theofilou ◽

Helen Panagiotaki

Keyword(s):

Cancer Treatment ◽

Cancer Patients ◽

Treatment Adherence ◽

Observational Studies ◽

Search Strategy ◽

Depression And Anxiety ◽

Psychosocial Characteristics ◽

Adherence To Medication ◽

Younger Age ◽

Positive Effect

Adherence to medication has been recognized as a key issue in health outcomes and efforts to improve patients’ adherence are being made by the pharmaceutical industry, experts, and government bodies alike. This paper presents a review of these issues according to previous descriptive findings. Relevant studies written in English, published in 1976 or later, were identified through Medline, Embase and PsycInfo databases and reviewed. Review articles and clinical trials were excluded; all observational studies and surveys were considered. Articles were reviewed for any discussion of patients’ characteristics and psychosocial characteristics affecting <em>adherence</em> to <em>cancer</em> treatment. The search strategy included a combination of key words adherence and cancer in titles. The major findings are summarized and presented under two main headings: i) patients’ characteristics; and ii) psychosocial characteristics. In general, factors associated with increased likelihood of adherence to cancer treatment included younger age, higher education, higher income and Caucasian ethnicity. With regards to the psychosocial factors, lower levels of depression and anxiety, optimism as well as social support seemed to have a positive effect on treatment adherence. Studies of patterns of care in cancer treatment can help identify challenges in health care provided to particular subgroups of cancer patients and can aid researchers in designing studies that account for such factors in clinical and outcomes’ research.

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