Improvement of Bleaching Effect on the Color of Enamel Surface with TiO&lt;sub&gt;2&lt;/sub&gt; Catalysis Convergence Bleaching Agent

Hwang, Gab Woon; Choi, M.-J.; Lim, sun-a

doi:10.15207/jkcs.2015.6.5.165

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…Teeth are stained by intrinsic factors such as the pathology of the pulp, certain drugs and systemic diseases, and extrinsic factors such as tobacco, coffee and coke (Jeong 2021). Teeth bleaching is to improve the color of teeth while minimizing structural damage to the stained (Hwang et al, 2015), and carbamide peroxide composed of urea and hydrogen peroxide, or hydrogen peroxide (H 2 O 2 ) are used for teeth bleaching (Mazilu et al, 2019). Hydrogen peroxide is a strong oxidizing agent divided into water and active oxygen (Dahl and Pallesen, 2003).…”

Section: Introductionmentioning

confidence: 99%

Teeth bleaching effect and anti-oral microbial activity of water-extracted apple (Malus asiatica)

Jeong

2022

JANS

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Apple contains nutrients such as sugars, dietary fiber, and vitamins as well as bioactive phytochemicals such as organic acid, fatty acid and phenolic compounds. This study was conducted to confirm the applicability of apples as a bleaching agent and functional substances for the prevention of oral infectious diseases and maintenance of oral health by investigating the bovine teeth bleaching effect, anti-oral microbial activity, and inhibitory effect of halitosis of water-extracted apple (WEA). From the results of quantitative analysis of the surface color of bovine teeth, the application of WEA significantly increased the ΔE value, indicating a bleaching effect. In the case of 100mg/ml, the ΔE value increased as the WEA application time increased, and the bleaching effect was the greatest. Based on the results of the disk diffusion test and selective culture using CRT bacteria test kit, WEA showed anti-oral microbial activity against the dental caries bacteria, Streptococcus mutans and Latobacillus casei, the periodontal bacteria, Aggregatibacter actinomycetemcomitans, and Eschericha coli, but showed no antifungal effect against Candida albicans, causing oral candidiasis. From the results of colony formation and generation of halitosis from salivary microorganisms, WEA inhibited the growth of salivary microorganisms and generation of components inducing halitosis such as hydrogen sulfide, methyl mercaptan and dimethyl sulfide, that occur during the metabolic process of oral microorganisms. Therefore, WEA is a functional substance derived from a safe and useful natural product that can be used for the prevention of oral infectious diseases and maintenance of oral health

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Section: Introductionmentioning

confidence: 99%

Teeth bleaching effect and anti-oral microbial activity of water-extracted apple (Malus asiatica)

Jeong

2022

JANS

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“…Tooth discoloration is caused by intrinsic and extrinsic factors. Intrinsic factors are associated with a pathology of the pulp, drugs, such as tetracycline and fluoride, certain systemic diseases, and tooth dysplasia, while extrinsic factors are associated with externally colored substances, such as cigarettes, coffee, and wine 3) .…”

Section: Introductionmentioning

confidence: 99%

“…As a treatment for discoloration of teeth, tooth bleaching is mainly used to preserve the tooth body and improve the tone of the teeth 3) . There are two types of tooth bleaching: in-office bleaching using 30 to 35% high concentration hydrogen peroxide (H2O2), performed at dental clinics, and home bleaching using a low concentration of 10 to 15% H2O2 [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Effects of Citrus limon Extract on Oxidative Stress-Induced Nitric Oxide Generation and Bovine Teeth Bleaching

Jeong

2021

J Dent Hyg Sci

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Background: We aimed to investigate the effect of Citrous limon extract (CLE) on oxidative stress-induced cytotoxicity and nitric oxide (NO) generation and the tooth bleaching effect of CLE as a substitute for hydrogen peroxide (H2O2) and determine the feasibility and application of CLE as a safe and effective natural tooth bleaching agent. Methods: The protective effect of CLE on H2O2-induced cytotoxicity in Raw264.7 macrophages was investigated by the MTT assay. The inhibitory effect of CLE on the generation of H2O2-induced NO was confirmed by the NO assay, and the changes in inducible nitric oxide synthase (iNOS) protein expression were confirmed by western blotting. Stained bovine teeth were treated with/without 15% and/or 35% CLE and H2O2, 15% sodium bicarbonate (NaHCO3) for 3 hours, and were irradiated with/without bleaching light (BL) for 15 minutes. The color change of the treated bovine tooth surface was measured using a colorimeter. Results: The viability of Raw264.7 cells treated with each concentration of CLE and 500 M H2O2 significantly increased as CLE increased, and NO generation and iNOS protein expression were significantly reduced in cells treated with 300 g CLE+/500 M H2O2+ and 300 g CLE+/500 M H2O2+/150 g NaHCO3+. The bleaching effect of 35% CLE+ was higher than that of 15% CLE+ and 15% NaHCO3+, and the effect was similar to that of 15% H2O2+. The 35% CLE+/15% NaHCO3+ showed the greatest bleaching effect and was higher than that of the groups irradiated with the BL. The greatest bleaching effect was observed with 35% CLE+/15% NaHCO3+, followed by 35% H2O2+/BL+. Conclusion: CLE inhibited oxidative stress-induced cytotoxicity and NO generation in Raw264.7 cells and, could replace H2O2, which causes side effects and risks in teeth breaching treatment. It showed greatest teeth bleaching effect when combined with NaHCO3. CLE is an effective and safe natural tooth bleaching substitute.

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A Gender and The Beauty Showed in Politician's Facial Appearance as an Element of Winning in the Election Process

Park¹

2016

Journal of Digital Convergence

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There will be coming soon a sequence of the so-called election season in Korea. That is the 20th session of general elections and the 19th presidential election which are taking place one after another. When we talk about presidential candidate, we may realize that the choice were relied upon candidate's facial appearance and speech, voice, dress, and so on. One poll showed that capacity and policy were ranked high and figure and image were ranked next by asking "what is the most important factor when you vote for the president?" This study looked into the candidate's face of a newly elected public office through the election voting. I studied how the factors of sex and beauty may affect on the election results. I analyse survey of candidate's photo on the election leaflets. Analyzed result said that candidate's competency and trust have strong relations in the voting choice rather than beauty even if it is statistically significant. I also find that both beauty and competency are positively interrelated.

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Improvement of Bleaching Effect on the Color of Enamel Surface with TiO<sub>2</sub> Catalysis Convergence Bleaching Agent

Cited by 4 publications

References 11 publications

Teeth bleaching effect and anti-oral microbial activity of water-extracted apple (Malus asiatica)

Teeth bleaching effect and anti-oral microbial activity of water-extracted apple (Malus asiatica)

Effects of Citrus limon Extract on Oxidative Stress-Induced Nitric Oxide Generation and Bovine Teeth Bleaching

A Gender and The Beauty Showed in Politician's Facial Appearance as an Element of Winning in the Election Process

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