Susceptibility of Enamel Treated with Bleaching Agents to …

Abstract. Objectives. Controversial reports exist whether bleaching agents cause a susceptibility to demineralization. The aim of this study was to compare the …

A Radical-Free Approach to Teeth Whitening

The effects of HP and CP as bleaching agents improve with longer application times and greater concentrations of available hydrogen peroxide. ... Hydroxyapatite as a nano-sized powder was included to ensure saturation with apatite mineral, to prevent mineral loss and enamel softening. ... KLA Corp., San Diego, CA, …

Effect of highly concentrated bleaching gels on enamel …

Background Dental bleaching is a common clinical practice. The aim of this study is to investigate the effect of 35% hydrogen peroxide (HP) bleaching gel on the morphology and microhardness of enamel, and to analyze the effect of four remineralizing agents. Methods One hundred blocks were prepared. The enamel surfaces were …

Dental Bleaching Techniques; Hydrogen-carbamide …

INTRODUCTION. Despite the large number of techniques described in the literature concerning the external bleaching of vital teeth, all are based on the direct use of hydrogen peroxide (H2O2) or its precursor, carbamide peroxide [].Minoux and Serfaty recognize that tooth whitening is a very complex process that depends on several …

Effects of experimental bleaching agents on the mineral …

Therefore, the tested hypotheses were that (1) the 35% hydrogen peroxide bleaching agent containing either calcium or fluoride would change the surface mineral content of sound or demineralized enamels and that (2) the addition of calcium or …

Effects of the bleaching procedures on enamel micro …

The bleaching agent was activated with a plasma arc unit (Remedent Belgium) for 30s and then allowed to rest for 10s. These cycles were repeated 15 times and the whole procedure repeated 4 times following the manufacturer's instructions. Group 2: laser bleaching by using White 10 gel.

Efficacy of organic and antioxidant agents to regain bond …

Carbamide peroxide or hydrogen peroxide is a regularly employed bleaching agent. 5 Reactive oxygen molecules, free radicals, and anions are released during the oxidation reaction that underlies the bleaching mechanism. They enter the enamel and dentin porosities and break down the double bonds in chromogens of …

Effects of experimental bleaching agents on the mineral …

Therefore, the second hypothesis was rejected, as the addition of Ca or F to the 35% HP bleaching agent was unable to increase mineral concentration of enamel subsurface. Based on the exposed, the addition of F and Ca to the 35% HP agent could keep and increase the mineral content of enamel surface for both sound and …

Effectiveness and Safety of Over-the-Counter Tooth-Whitening Agents

1. Introduction. Tooth-whitening has become a highly sought-after in-office dental treatment [].Beyond that, the market for over-the-counter (OTC) whitening systems has increased over the last years [], due to a rising demand for easy and home-based aesthetic procedures.Dental in-office bleaching systems are primarily based on …

Colorimetric Comparison of Internal Bleaching with and …

The bleaching agent containing 37% carbamide peroxide gel (FGM, Whiteness superendo, Joinville, SC Brazil) was inserted into the access cavities of all specimens and covered with a small cotton pellet, and the cavities were sealed with Coltosol. The bleaching procedure was performed in all teeth 5 times at 6-day intervals.

(PDF) Effects of experimental bleaching agents on the …

Results: According to three-way (FT-Raman and μ-EDXRF analyses) or two-way analysis of variance (ANOVA) (CSMH) and Tukey test (α=5%), the calcium or …

The Effect of In-Office Bleaching with Different …

Manufacturers have introduced a wide range of bleaching agent concentrations and application techniques to improve the bleaching effect. As a result, there has been a significant increase in commercially available in-office tooth-bleaching products that commonly use high levels of hydrogen (15% to 45%) or carbamide (≥37%) …

Optimization of Bleaching Process

Optimization of Bleaching Process. Introduction. The bleaching of edible oils and fats is a part of the refining process of crude oils and fats, which removes contaminants that adversely impact the appearance and performance of these triglyceride (triacylglycerol)-based materials. Typically, edible oils and fats, ranging from soybean and palm ...

Nano-hydroxyapatite-induced remineralization of artificial white …

Objective: To assessed in vitro the effect of nanohydroxyapatite (n-HA) to improve the aesthetic appearance and microhardness of white spot lesions (WSL) when associated with a low-concentration bleaching agent (carbamide peroxide-CP10%). Material and methods: Enamel/dentin specimens (n = 60) of 5 × 5 × 2.2 mm were prepared, of these, 48 were …

Effects of Bleaching Agents Combined with Regular and …

Bleaching. The HP bleaching agent (White Class, FGM, SC, Brazil), pH 6.0-7.0, ... and a significant increase in mineral content of all three groups with a p < 0.05 was observed. Conclusion ...

Light-activated Bleaching: Effects on Surface …

Results: All three in-office bleachers elicited increase in phosphate v1 molecule concentration during bleaching process (p ≤ 0.05), Pola Office, with both types of activation caused significant ...

Influence of two remineralizing agents on bleached enamel …

PMID: 36254958. DOI: 10.4103/ijdr.ijdr_896_21. Abstract. Aim: To investigate the effects of bleaching with 35% hydrogen peroxide on the structure of tooth enamel and the role of …

Developments in application of enzymes for textile processing

Optimized bio-bleaching of cotton, linen and their blends with 25 U/ml GOE, 10 g/l D-glucose, at 85 °C & pH 10 for 90 min: Ramadan, 2008: Glucose-Oxidase (Aspergillus niger) (Biozyme) Amyloglucosidase/pullanase mixture used for sufficient (800 mg/l) H 2 O 2 for bleaching and maximum whiteness obtained in alkaline pH compared …

Effect of Remineralizing Agents on Tooth Color after Home …

It is now a common practice to whiten discolored teeth using low concentrations of carbamide peroxide (CO (NH 2 )2.H 2 O 2) and hydrogen peroxide …

Surface Changes of Mineral Trioxide Aggregate after the …

The surface of the MTA covered with each bleaching agent changed in terms of both color and structure compared with the control. EDX showed that both bleaching agents affected the elemental distribution. A decrease in Ca and an increase in Si were shown, and this tendency was especially pronounced in the higher hydrogen …

The impact of remineralization agents on dental bleaching …

This study evaluated the effect of remineralization agents on bleaching efficiency, enamel mineral changes, and post-bleaching color stability. A total of 112 enamel-dentin blocks were prepared ...

chemical bleaching of minerals to increase whitness

Bleaching Agents Market Size And Forecast. Bleaching Agents Market was valued at USD 694.16 Million in 2018 and is projected to reach USD 1,049.86 Million by 2026, growing at a CAGR of 5.28% from 2019 to 2026.. The rapid increase in the consumption of bread and related bakery products in various parts of the globe have contributed to the …

A Critical Review of Modern Concepts for Teeth Whitening

3. Whiteness of Teeth. In order to assess the performance of a whitening agent, in vitro and in vivo methods have been developed to quantify the degree of whiteness and of staining (e.g., the pellicle cleaning ratio [PCR] is a very prominent in vitro approach) [].Staining solutions to determine the PCR in vitro often contain coffee or tea …

Susceptibility of Enamel Treated with Bleaching Agents to Mineral …

The aim of this study was to compare the calcium loss of enamel treated with different bleaching agents and activation methods. Method and Materials. The specimens obtained from human premolars were treated in accordance with manufacturer protocols; 10% carbamide peroxide, 38% hydrogen peroxide light-activated, 38% …

Textural characteristics, surface chemistry and activation of bleaching …

Among the four stages, bleaching is the most critical stage since it helps to improve the appearance, flavor, taste and stability of the final oil products [1], [5], [6], [7]. During bleaching process, the oil is brought into contact with a surface-active substance that adsorbs undesired particles.

Effect of highly concentrated bleaching gels on enamel …

Bleaching Agent

Bonding with glass ionomer cements and resin-modified glass ionomer cements. C. Rahiotis, S. Schricker, in Orthodontic Applications of Biomaterials, 2017 16.4.4 Bleached teeth. Various bleaching agents and methods exist to whiten discolored teeth at the dental office or at home. The results of studies about the effect of bleaching on the bond …

Home‐based chemically‐induced whitening (bleaching) of …

The same survey reported that there was a 29% increase in patients receiving tooth whitening in a span of 1 year and was expected to increase to 45% and more in the years to come. 70% of patients who opted for bleaching were females. 75% of respondents reported the use of at‐home or over‐the‐counter whitening products. 18% of …

Effectiveness and Safety of Over-the-Counter …

These findings are consistent with the results of a meta-analysis, which concluded that peroxide-based bleaching were more effective than non-peroxide bleaching agents . Furthermore, it was …

(PDF) THE USE OF BLEACHING AGENTS TO AESTHETICALLY …

The bleaching agents used to mask the white/ ... This would increase mineral . deposition, reduce enamel solubility and ... Three in-office bleaching agents had no significant color changes on two ...

Food Bleaching Agents Market Size, Industry Share, …

The bleaching agent in food products acts as an antimicrobial agent and help to improve the shelf life of the final product, which is expected to increase its usage among food products manufacturers. Stringent regulation against the commercialization and usage of bleaching agents in food products is hindering the growth of the bleaching agent ...

Maintenance of enamel properties after bleaching with high …

Changes in enamel morphology and surface hardness reduction by demineralization of this tissue after exposure to bleaching agents have been related to the "nonspecific" oxidizing action of hydrogen peroxide (HP) and its by-products on organic and inorganic structures of the tooth structure [1,2,3].This would lead to significant changes …

Maintenance of enamel properties after bleaching with high …

Experimental bleaching gels containing calcium polyphosphate sub-microparticles as a mineral source reduce the mineral content alteration and superficial …

The Best Natural Teeth Whitening Methods Reviewed

Many healthy foods can improve teeth health, strength, and brightness. These include, but are not limited to: ... Cheese, yogurt, and milk contain lactic acid and the enamel-fortifying mineral calcium, which strengthen the teeth and decrease the risk of stains and damage. ... Hydrogen peroxide (HP) is a natural bleaching agent that can kill ...

Comparison of laser and power bleaching techniques in …

Both techniques were able to increase whiteness and decrease yellowness ratio of the samples. ΔE decrease for laser bleaching and power bleaching groups were 3.05 and 1.67, respectively. Tooth color change in laser bleaching group was 1.88 times more than that of power bleaching group ( p <0.001).

Improving the whiteness and photostability of wool

To further improve its whiteness, wool can be treated with a fluorescent whitening agent (FWA) either after oxidative bleaching or by including the FWA in the reductive bleaching bath. FWA-treated wool absorbs UV light and emits blue fluorescence, which makes it appear much whiter than bleached wool.