• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.2
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• pp.856-865
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• 2012

Maintenance systems are demanded to manage malodor-information and deal effectively with the odor-related civil complaints by constructing the database for sources of malodor compounds in real time. In this paper, to carry out these tasks, a real-time monitering system for malodor based on ubiquitous sensor networks(USN) is presented. The constructed monitering system stores the malodor data collected periodically from industrial complex into the database and shows in real time the circumstances of the odor sources being emitted around the industrial complex by indicating on the map where it is taking place. Besides, by clicking an icon indicating the sensor node on the map, we can figure out what firms are located near the malodor source and possible material related with those firms. The proposed system is considered to enhance the efficiency of management of malodor-emitting firms based on the malodor-related information.

• Journal of Korean society of Dental Hygiene
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• v.17 no.6
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• pp.1195-1206
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• 2017

Objectives: The purpose of this study is to analyze relationship between oral health status and subjective oral malodor awareness of public health students. Furthermore, this study aimed to recognize the importance of prevention and treatment of internal and external factors and to contribute to the correct oral health management behavior. Methods: The study subjects were 500 students from 5 health departments of 2 universities located in Jeollanamdo who participated in self-administered survey from September 1 to 15, 2014. For statistical analysis, SPSS 21.0 for Windows was used. Descriptive analysis and a Chi-square test were conducted to investigate the effects of general characteristics, health behavior, oral health behavior, and oral health status on subjective oral malodor awareness. Finally, to investigate the relationship between oral health status and subjective oral malodor awareness logistic regression analysis was performed. Results: Subjective oral malodor awareness was significantly higher in the group requiring dental care with the score of 1.63 (95% CI 1.00-2.65) compared to the group not requiring dental care. Subjective oral malodor awareness was significantly higher in the severe coated tongue group with the score of 5.31 (95% CI 1.45-19.40) and significantly higher in the moderate coated tongue group with the score of 2.56 (95% CI 1.61-4.08). Subjective oral malodor awareness was significantly higher in the often mouth breathing group with the score of 2.13 (95% CI 1.02-4.47) and significantly higher in the sometimes mouth breathing group with the score of 2.66 (95% CI 1.65-4.29). Conclusions: In order to prevent oral malodor, it is emphasized that regular dental checkups, proper brushing after the meal, and brushing of the tongue are necessary to remove the coated tongue. In addition, the use of supplementary oral care products is considered to be a meaningful oral health behavior.

• The Journal of Korean Medicine
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• v.30 no.2
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• pp.79-87
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• 2009

Objective: This study assessed five respective herbs in Cheonggugamrosu (CGGRS) for ability to inhibit malodor in vitro. Methods: We used malodor modeling of the salivary sediment system. Incubation mixtures were prepared with sediment at 16.7% (v/v), amino acids (cysteine and tryptophan) at 6mM and either herb extract at 1% (w/v) or water as control. Mixtures were incubated at $37^{\circ}C$ and odor was monitored organoleptically and for volatile sulfur compounds with the Halimeter. Indole/skatole was determined by Kovac's colorimetric method. Results: Two of the herbs, Caryophilli Flos and Glycyrrhizae Radix, had inhibitory effect on malodor generation. Both of them significantly reduced VSC, organoleptic odor and indole/skatole formation (p<0.05). Conclusions: We found Caryophilli Flos and Glycyrrhizae Radix played a main role in CGGRS. Both herbs have potential as effective anti-malodor agents and this suggests they are worthy of further exploration.

• Journal of Korean society of Dental Hygiene
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• v.9 no.3
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• pp.493-506
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• 2009

The purpose of this study was to examine the awareness of people in general characteristics about oral malodor. The subjects in this study are 184 people who visited the clinical practice lab at J health college to get their teeth scaled. After conducting a survey from May 1 to June 3, 2008, we selected four different ares and then analyzed the answer sheets from 179 respondents including smoking/nonsmoking, scaling experience, toothbrushing frequency and the use of oral hygiene supplies. SPSS WIN 12.0 program was used to make a frequency analysis and cross analysis. The findings of the study are as follows: 1. Concerning an intention of treatment for oral malodor, 37.4% didn't intend to receive treatment even in case of having bad breath. 28.5% didn't yet have any definite idea about that, and 20.7% had no mind to do that at all. 10.6% had an intention to receive treatment, and 2.8% want to receive treatment. 2. As for how to cope with oral malodor in case of suffering from it, 47.5% chewed gums or ate candy. 25.1% scarcely care about that, and 15.6% covered their mouth whenever they spoke. 9.5% had little confidence about talking to others, and 2.2% found it difficult to build an amicable interpersonal relationship. 3. Concerning what to do about another person's oral malodor, 40.8% did nothing, and 19% talked to the person about that. 17.3% gave him or her chewing gum. Among their oral health characteristics, toothbrushing frequency made a significant difference to the way they responded to another person's oral malodor(p<.05). 4. As to subjective feelings about another person's oral malodor, 41.9% just found it bearable. 36.9% were a little displeased, and 9.5% never felt bad about another person's bad breath. 8.9% tried to avoid the person, and 2.8% advised him or her to chew gum. 5. Regarding an intention of participating in a oral malodor program, 46.9% had no idea about that. 31.3% intended to participate in the program, and 13.4% wanted to do that without fail. 6.1% had no mind for that, and 2.2% were never going to do that. Among characteristics of the user oral hygiene device made a significant difference whether to participating in the oral malodor program(p<.05).

• Journal of Oral Medicine and Pain
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• v.40 no.2
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• pp.41-46
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• 2015

Purpose: This study was performed to investigate a correlation among oral hygiene habits, dryness of mouth, and self-perceived oral malodor and therefore to find out self-care methods which could be a help to reduce oral malodor. Methods: A survey of 296 dental undergraduate students of School of Dentistry, Pusan National University, who wrote consents voluntarily and participated in this study, was conducted using a questionnaire consisting of 17 questions and analyzed to investigate a correlation among oral hygiene habits (frequency of tooth brushing, water gargling, and drinking water, etc.), dryness of mouth indicating the amount of salivary secretion, and self-perceived oral malodor. Results: There was no significant correlation between mechanical cleaning factors and self-perceived oral malodor. The factor showing a strong correlation with severe self-perceived oral malodor was dryness of mouth (p=0.000). Conclusions: There was no correlation between mechanical cleaning habits and self-perceived oral malodor. Participants who felt self-perceived oral malodor more tended to have rather good mechanical cleaning habits. The factor showing a strong correlation with severe self-perceived oral malodor was dryness of mouth. Therefore trying to increase salivary secretion is considered to be a help to reduce self-perceived halitosis.

• Journal of Korean Dental Hygiene Science
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• v.1 no.1
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• pp.57-63
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• 2018

The coffee demand market in Korea is growing every year, and the adults drink an average of one cup of coffee every day. In order to investigate the effect of coffee on oral malodor, 15 Korean subjects were recruited. There were no significant differences in the values of oral malodor using BB checker(Taiyo, Japan) in the factors of sex, smoking, drinking, feeling oral malodor by themselves, feeling oral malodor by others, periodic scaling, activity of Streptococcus mutans, bleeding on probing, and coffee drinking habits. Patient hygiene performance index, calculus index, index of coat on the tongue, toothbrushing time, toothbrushing frequency had no correlation with oral malodor. The difference between before and after drinking coffee with syrup(17.93±16.54) was significant, but the difference between before and after drinking coffee without syrup(1.13±14.75) was not significant. We suggested the cause of oral malodor after drinking coffee was syrup, but not coffee.

• Journal of Korean society of Dental Hygiene
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• v.12 no.3
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• pp.465-470
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• 2012

Objectives : In general, the active of volatile compounds which become usually known as the principal ingredient of bad breath is closely connected with temperature. In this study, an investigation was made into the correlation between oral malodor and the temperature of rinsing water. Specifically, an analysis was made of saliva in rinsing water with relation to amount, flow and pH. In addition, a calculation was made of O'Leary index. The results are expected to be basic data for oral malodor reduction plans. Methods : A total of 30 women who are in their 20s without any systemic disease and teeth braces and non-pregnant were chosen for the study. The research was carried during 3 weeks from 28 Mar to 11 Apr in 2011. Results : Saliva was not significantly affected by the temperature of rinsing water, in connection with saliva amount, saliva flow and saliva pH. The O'Leary index and oral malodor was the highest in warm water, but the subjects preferred rinsing with cold water. Conclusions : In conclusion, oral malodor was found to be reduced in inverse proportion to the temperature of rinsing water. Thus, it is recommended to rinsing water with warm water after tooth brushing.

• Journal of Periodontal and Implant Science
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• v.38 no.4
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• pp.699-708
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• 2008

Purpose: The aim of this study was to investigate the effect of tongue cleaner-equipped manual toothbrush on tooth cleanness, tongue cleanness and malodor index. Materials and methods: 504 subjects were included in this study. At 1st visit, basic information such as age, sex, smoking amount and alcohol consumption was recorded. Self assessment by individual subjects was performed regarding satisfaction to old toothbrush and toothbrushing habit. Tooth cleanness, tongue cleanness and malodor index was assessed by professional researcher. Tongue cleaner-equipped manual toothbrush was given to each subject with proper toothbrushing instruction. After 1 month passed, self assessment and researcher assessment regarding the same index were performed and analyzed statistically by chi-square test. Results: At 1st visit subjects seem to ignore tongue cleansing and showed poor tooth cleanness index, tongue cleanness index and malodor index, however the same subjects were motivated to clean their tongue and teeth and presented statistically improved distribution pattern in tooth cleanness index, tongue cleanness index and malodor index after using tongue cleaner-equipped manual toothbrush(p<0.01). Satisfaction to tongue cleaner-equipped manual toothbrush was 98%. Conclusion: Tongue cleaner-equipped manual toothbrush would be an effective tool for maintaining good oral hygiene through improving tooth and tongue cleanness and preventing malodor formation.

• Journal of Korean Society for Atmospheric Environment
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• v.22 no.5
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• pp.679-692
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• 2006

The carbonyl compounds in the atmosphere belong to one of the regulatory pollutants for the malodor control designated by the Korean Ministry of Environment(KMOE). In the present study, the emission concentration levels of carbonyl compounds were measured along with a number of criteria odor pollutants from a total of 47 individual companies(June 2004 to January 2005). The results of our study showed that a number of carbonyl compounds(such as formaldehyde, acetaldehyde, acetone, and butyraldehyde) maintained significantly high mean concentrations of 298 to 372 ppb. In contrast, other carbonyl compounds were low enough with the mean valves of 0.54 to 19.1 ppb. It was found that except for such industries as metal production or leather processing, their emissions were generally quite significant. If the measured values were evaluated in terms of malodor intensity, butyraldehyde appeared to be the most significant contributor to the malodor release. According to the measurements made in strong source areas, it can be concluded that several carbonyl compounds(acetaldehyde, propionaldehyde, butyraldehyde, isovaleraldehyde, and valeraldehyde) are useful enough to diagnose malodor release from those source areas. It should also be addressed that a number of carbonyl compounds added newly as the result of malodor control legislation were not sensitive enough to diagnose malodor release from such sources.

• Journal of Korean society of Dental Hygiene
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• v.8 no.1
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• pp.119-131
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• 2008

This study was peformed in order to find out the relationship between the causing factors and the production of each gas 01 oral malodor, to contribute the oral malodor control at dental clinic as well as to establish the effective application of malodor control project for public oral health program 127 patients from 20 to 40 years old who had been visited for preventive dental cares were participated for the study. Such items as caries status, periodontal status, salivary flow, viscosity, pH. Snyder test, plaque deposit and tongue plaque were checked through the oral examination in order to find out the contributing factors Hydrogen sulfide, Methyl mercaptan, Di-methyl sulfide and Ammonia gas components were checked with Oral-Chroma and Attain, the oral malodor check units. Not only the corelation coefficiencies but also the multi-way variance analysis were calculated between each causing factor and each component of oral malodor gases to estimate the contributing factors of the oral malodor. 1. There was no relationship between the caries status and each component pf the oral malodor such as sulfur compound or Ammonia, both in laboratory test and VAS test (pF0.05). It revealed negative relationship between Hydrogen sulfide and FT(rM-0.1904. pE0.05) as well as the VAS and FT (rM-0.210. pE0.05). S0, it was estimated that the less oral malador was recognized when caries state changed to filled state in Hydrogen sulfide laboratory test or VAS test 2. High relationship was showed between salivary flow and Hydrogen sulfide (rM-0.183, pM0.039), Methyl mercaptan(rM-0.234, p-0.008). Dimethyl sulfide(rM-0.234, pM0.008) and Ammonia(-0.361. pM0.001) gas(pE0.05). 3. There was a high relationship between M-PHP(Modified-Patient Hygiene Performance Index) and tong plaque all kinds of sulfide(rM0.249. pM0.005). Ammonia gas component(rM0.232, pM0.009). 4. It was found that considerable relationship was appeared between the periodontal status and Ammonia gas (rM0.274, pM0.002), so, it should be needed to control Ammonia. Such dental Cares as the prevention or early treatment of periodontal disease and the accelerating the salivary flow as well as reducing the amounts and activities of filament or spiral typed oral micro-organism were recommended for adults, not only for dental care program at the dental clinics but also for public health programs, in order to promote the oral health and quality of file for individual and community peoples.