• The Korean Journal of Health Service Management
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• v.8 no.2
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• pp.187-195
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• 2014

To improve oral hygiene management, the effects of toothbrush training on general oral hygiene based on the simplified oral hygiene index(S-OHI) and degree of knowledge about toothbrushing were examined. Pre-and post-training changes in the S-OHI (lower score = better oral health status) showed a significant decrease in score in all variables (gender, age, marital status, occupation, and level of education).Pre- and post-training changes in the degree of knowledge about toothbrushing showed a significant increase. Negative correlations between the S-OHI, oral health status, and degree of knowledge about toothbrushing and the S-OHI and the Decayed, Missing, Filled (DMF) index (the better the oral cavity environment, the lower the DMF index) were observed. Positive effects of repeated toothbrush training on the maintenance of healthy oral cavity environment and continuous oral health management were observed, as reflected by the correct toothbrushing-related knowledge and skills.

• Journal of the korean academy of Pediatric Dentistry
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• v.28 no.2
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• pp.300-309
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• 2001

The purpose of this study was to investigate the caries prevalence and caries pattern of preschool children in a small city. Six hundred twenty four kindergarten children in Milyang city were examined for their caries experience of individual teeth and surfaces by dmf index. The obtained results were as follows. 1. The rate of children with caries experience(dmft rate) in primary teeth was 74.0% in 3-year-olds, 83.8% in 4-year-olds, and 90.6% in 5-year-olds. The mean number of decayed, missed, and filled primary teeth(dmft index) was 3.47 in 3-year-olds, 5.41 in 4-year-olds, and 6.01 in 5-year-olds. 2. The caries prevalence of children in this study was higher than those of other researches in past and in other cities. 3. The caries-experienced teeth in order in 5-year-olds were as follows : mandibular 2nd primary molar, mandibular 1st primary molar, maxillary 2nd primary molar, maxillary primary central incisor and maxillary 1st primary molar. 4. The pattern of dental caries development was different between the incisors and molars. The prevalent surface of caries was proximal surface in primary incisors, but occlusal surface in primary molars.

• Journal of dental hygiene science
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• v.6 no.1
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• pp.19-22
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• 2006

To prepare basic data for oral health promotion of high school students through the survey of the recognition of oral health, a questionnaire survey was conducted for 369 students. Statistical analysis was conducted using the SPSS 11.5 with $x^2$-test, fisher's exact test, t-test. The obtained results were as follows 1. The average of the high school student's DMF rate, DMFT index and SiC Index was 87.53%, 3.36, 6.50. 2. The average of the high school student's oral health knowledge was more than 3, 70% of highschool did right toothbrushing. But toothbrushing frequency of student of more than 60% was less than 2 a day. 3. In SiC Index, Only 30% of high school students received oral health education and 80% of them recognized oral health manpower's education needs.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.24 no.3
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• pp.345-352
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• 2014

Objectives: This study is aimed to describe the current situation about urinary biomarker N-methylformamide(NMF) for workers exposed to N,N-dimethylformamide(DMF) according to industrial classification. Materials: Special health examination records of the workers who had undergone urinary biological monitoring in 2013 were collected. The numbers and percentage of workers, whose urinary NMF values were above the limit of detection(LOD) and above the biological exposure index(BEI) were calculated. Health relatedness with DMF as judged by their doctors was also described. All description was classified according to the $9^{th}$ Korean Standard Industrial Classification(KSIC). Results: It appeared that most workers exposed to DMF belong to manufacturing section(80.7%). The geometric mean(GM) values of urinary NMF were 6.25 mg/L, 3.54, and 3.86 for the manufacturing section, professional, scientific and technical activities section, and for the construction section respectively. In detail, it seemed that division of textiles(except apparel) (GM 7.51 mg/L), division of leather, luggage and footwear(11.59 mg/L), and division of rubber and plastic products(6.89 mg/L) were highly exposed to DMF with a high percentage of workers with urinary NMF values above BEI. This was probably due to the effect of skin absorption that the division of leather, luggage and footwear showed the highest urine NMF GM. Conclusions: It seemed that workers in manufacture industries such as textile, leather, luggage, footwear, rubber and plastic products were highly exposed to DMF. So, efforts should be focused on those industries in order to effectively diminish worker's exposure. Further studies to compare DMF air-monitoring with bio-monitoring according to industrial classification should be considered.

• Journal of Korean Society of Environmental Engineers
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• v.36 no.7
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• pp.492-497
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• 2014

This study investigated removal characteristics of organic matters in pretreatment and reverse osmosis (RO) membrane processes for seawater desalination. Also, the influence of the changes in characteristics of organic matters on the membrane fouling was assessed. The pretreatment processes included dual media filtration (DMF), pressurized membrane filtration (MF), and submerged membrane filtration (SMF). Turbidity, UV absorption at 254 nm, dissolved organic carbon, size exclusion chromatography (SEC), fluorescence excitation emission matrix (FEEM), and transparent exopolymer particles (TEP) in raw and processed waters were analyzed. Ions and minerals were not removed by any pretreatment process tested, but were removed over 99% through the RO membrane process. Hydrophobic organics, which can play major role in organic membrane fouling, were relatively readily removed compared with hydrophilic ones. Membrane based pretreatment such as MF and SMF exhibited better removals of organics than conventional DMF. As the levels of organics in pretreated water decreased, the silt density index (SDI) decreased. MF treated water exhibited the lowest SDI value; this is possibly due to the lowest TEP ($0.1-0.4{\mu}m$) concentrations.

• Journal of dental hygiene science
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• v.10 no.4
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• pp.251-257
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• 2010

The purpose of this study was to examine the demographic characteristics, oral health awareness and oral health behavior of 1,356 Korean senior citizens based on the fourth raw materials of the 2008 national health and nutrition survey, and to analyze their DMFS, DMFT and FS-T indexes, which were oral health indicators. The findings of the study were as follows: 1. The mean DMFS index of the Korean senior citizens was 26.62, and their average DMFT index was 6.76. Their mean FS-T index was 21.51. 2. Out of the demographic characteristics of the Korean elderly people, education made statistically significant differences to the DMFS(p<0.05) and FS-T(p<0.001) indexes, and whether they worked or not made statistically significant differences to the DMFT(p<0.01), DMFS(0.001) and FS-T(0.001) indexes. There were no significant gaps according to gender, age and presence or absence of a spouse. 3. The oral health awareness of the Korean senior citizens(subjective oral health status, whether to need a dental treatment, concern for oral health and mastication) had no statistically significant relationship to their DMFS, DMFT and FS-T indexes. 4. Among the oral health behaviors of the Korean elderly people, whether they got a dental checkup over the past year made statistically significant differences to the DMFT(p<0.01), DMFS(p<0.001) and FS-T (p<0.001) indexes, and there were statistically significant gaps in the DMFT(p<0.010, FS-T(p<0.01) and DMFS(p<0.001) indexes according to yesterday's toothbrushing frequency. The time when they went to a dentist made a significant difference to the FS-T(p<0.01) index only.

• Journal of Korean society of Dental Hygiene
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• v.4 no.1
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• pp.31-48
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• 2004

Dental caries taking place with milk teeth affects eruption of permanent teeth adversely, and thus, it is very important to prevent dental caries from taking place with a child in maintaining his/her physical, mental and emotional health. In this study as conducted to obtain basic data to be required for development of a program for letting preschool children form a habitual life for oral health and right dietary life, a total 172 children aged 5 years and 6 years were selected from children who lived in Hwasung-si, Kyunggi-do and attended preschools (childrens houses) located there with the consent of their guardians. Then, the weight length index (WLI) and blood components of each child were analyzed, and each relation between the weight length index (WLI) and dental caries of milk teeth and between blood components and dental caries of milk teeth was comparatively examined, and thereby, the following results were obtained. When the dmf rate of each group according to the obesity was examined, it was found to be 87.50% in the under-weight group, 71.20% in the normal weight group and 83.87% in the overweight group. And when the dmft rate of each group was examined, it was found to be 48.43% in the under-weight group, 37.10% in the normal weight group and 47.17% in the overweight group. Also, when the dmft index of each group was examined, it was found to be 3.9 in the under-weight group, 3.0 in the normal weight group and 3.8 in the overweight group. That is to say, the under-weight group and the overweight group having an abnormal weight were found to be higher in all of the dmf rate, the dmft rate and the dmft index than the normal weight group. It could be, therefore, known that normal weight should be maintained in order to prevent dental caries of milk teeth. And, it is thought that a right dietary life habit ensuring intake of balanced nutrients should be formed for maintenance of a normal weight. As a result of examining the relation between nutrient components in blood and dental caries of milk teeth, in the case of children with no dental caries, inorganic nutrient components of blood had a tendency to be a little higher, but no statistical significance was observed therein. Meanwhile, it was found that there was a relation between blood type and the dmft index.

• Journal of Korean society of Dental Hygiene
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• v.5 no.1
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• pp.29-38
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• 2005

In 2001, as a subject of this study, the first grade 165 kids in Yomju elementary school had been guided in pit and fissure sealant, fluoride rinse, group tooth brushing, and Dental health education as a part of oral disease preventive program. From the data, this author has estimated incremental dental health care program in school dental clinic in order to make it more effective and enlarge it. For that purpose, the program has been continued at six month intervals for two years. The retention condition of pit and fissure sealant in first molar and DMF rate had been investigated. The conclusions are as follows: 1. Full and partial retention of pit and fissure sealant was measured as 80.69% in maxillary right first molar, 83.20% in maxillary left first molar, and 86.72% in mandibular right first molar, and 86.28% in mandibular left first molar. 2. Retention of pit and fissure sealant in first molar was measured as 76.55% in maxillary right first molar, 81.03% in maxillary left first molar, 80.65% in mandibular left first molar, and 82.03% in mandibular right first molar. 3. Among Yomju elementary school students, DMF rate was measured as 8.7%, and DMFT index as 1.03. However, in Yangdong elementary school students the former was measured as 13.8% and the latter as 1.76. When the DMF rate difference between Yomju and Yangdong elementary school kids was considered, the oral health condition of the former was much better than that of the latter because the former had received incremental dental health care program for two years and on the other hand, the latter had not. So it is necessary that we should enlarge school dental clinic, improve and keep students' oral health.

• Journal of the korean academy of Pediatric Dentistry
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• v.5 no.1
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• pp.39-43
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• 1978

I have studied on the dental caries incidence of 172 poliomyelitis children who are housed in rehabilitation hospital age from 3 to 13 years compared to a group of normal children. The results were as follows; 1. def rate of the poliomyelitis children was 68.63% (male 66.67%, female 71.43%) and was low value compare with that of control group of 78.64% (M 75.93%, F81.63%). 2. def index per person of poliomyelitis children was 2.37 (M 2.00, F 2.91) and was low in number compare with that of 3.29 (M 3.33, F 3.24) in control group children. 3. DMF rate of the poliomyelitis children was 59.41% (M 54.55%, F 62.79%) and was higher value than that of 48.28% (M 37.88%, F 59.96%) in control group. 4. DMF incidence per person in poliomyelitis was 1.62 (M1.48, F1.89) and was also higher in number than that of 1. 220 (M 0.85, F 1.49) in control group. 5. The dental caries incidence was higher in female than in male.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.1 no.1
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• pp.25-32
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• 2005

The purpose of this study was to furnish data on the disabled's oral health status of the disabled in Busan, Korea. Material and Methods: Two dentists who were well experienced in caries examination surveyed the oral health status on 793 of disabled men in Busan from March to June in 2000 under natural solar light with plane mirror by the criteria which are suggested by World Health Organization (WHO). Results: The number of present permanent teeth of the disabled are lower than the undisabled. DMF rate and DMFT indices of the disabled were higher than the undisabled. DT rate of the disabled was higher than the undisabled. Conclusions: The development of community oral health care programs for the prevention and treatments of dental caries for the disabled is needed and active administrative policies should be established for the promotion of the disabled's oral health.