• Tuberculosis and Respiratory Diseases
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• v.40 no.6
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• pp.700-708
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• 1993

Background: Lung cancer has become one of the most common cancers in Korea. It is important to determine the accurate histologic types and stages because of different therapeutic modlaity, especially in small cell carcinoma. This study was designed to evaluate diagnostic yields according to variable diagnostic methods in lung cancer. Methods: The records of 683 patients with a confirmed diagnosis of primary lung cancer during the period of 7 years, from January, 1986 until December, 1992 at Presbyterian Medical Center were analyzed retrospectively. Results: 1) Age and sex distributions Male: female sex ratio was 5.57:1 and age distributions were 7th decade 41.4%, 6th decade 30.2%, 8th decade 17.0%, 5th decade 7.9%, 4th decade 2.5%, 9th decade 1.3%, and 3rd decade 0.2% in decreasing order. 2) The frequencies according to histologic cell types were squamous cell carcinoma 44.7%, small cell carcinoma 23.9%, adenocarcinoma 22.8%, alveolar cell carcinoma 2.5%, large cell carcinoma 1.2%. mixed forms 1.2%, undifferenciated cell carcinoma 0.6% and malignant fibrous histiocytoma 0.2%(1 case) in decreasing order. 3) The most common locations of lung cancer were in left upper lobe and right lower lobe, and no differences of diagnostic methods according to locations were noted. 4) In central lesions, bronchoscopic examination was very accurate and frequently used diagnostic method, and in peripheral lesions, transthoracic lung biopsy(TTLB) was apparent1y accurate method. 5) The diagnostic yields of bronchoscopic biopsy, bronchial brushing, sputum cytology, transthoracic lung biopsy and transbronchial lung biopsy(TBLB) were 81.3%, 57.5%, 31.1%, 69.6% and 61.6%, respectively. 6) The concordance rates between the histologic diagnosis with bronchial brushing and sputum-cytology were 91.3% and 98.4%, respectively. 7) It was appropriate in lung cancer to repeat sputum cytology 3 to 5 times. Conclusion: Bronchoscopic examination is important to determine the histologic cell types in lung cancer. In addition, we should be interrested in improving diagnostic yields of sputum cytology as an easy method.

• Korean Journal of Microbiology
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• v.44 no.4
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• pp.289-292
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• 2008

Trisodium phosphate 12 hydrate and citric acid monohydrate mixture showed the strong anti-sticking effect on Streptococcus mutans, Streptococcus mitis, and Streptococcus salivarius, which are adhered to glass beads. Each Streptococcus species was shaking-cultured in brain heart infusion broth containing three glass beads. After 18 hr, glass beads were slightly washed into normal saline by three-pin-pointed pincette. Each three glass-beads set was put into reagent -containing tubes, which have 40 mg of bits of weighing paper for gaining brushing effect as similar as brushing one's teeth. The tubes were shaken by vortex mixer for 10 min except non-oral microbe, Streptococcus agalactiae (5 min). The samples were colony-counted by serial agar dilution method. Experiment was repeated three times for each Streptococcus species. The relative ratios of bacterial de-adherence by reagents were calculated in comparison with normal saline control. The de-adherence degree of citric acid-trisodium phosphate-saline mixture (CTS, pH 6.0) against Streptococcus mutans came to an average of 12.5 times compared with normal saline control. Trisodium-saline (TS, pH 8.4) showed the average of 7.5 times, and citric acid-saline (CS, pH 4.6) showed 6.0 times compared to the control group. The bacterial de-adherence degree against Streptococcus salivarius was each 7.2,2.6 and 2.8 times in above reagent sequence in comparison with saline control. CTS and TS showed 2.4 and 3.4 times of anti-sticking effect on Streptococcus mitis respectively, but CS had no anti-sticking effect on this bacterium. CTS, TS and CS showed 0.7, 0.6, and 0.6 times on non-oral microbe, Streptococcus agalactiae, separately compared with saline control. These results show that oral Streptococcus mutans, Streptococcus salivarius, and Streptococcus mitis, which are causative of dental caries or subacute endocarditis, may be easily removed from oral cavity by CTS mixture. It is conceivable that our experimental results will enable the development of a new conceptive toothpaste to prevent dental caries or subacute endocarditis after drawing teeth.

• Korean journal of food and cookery science
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• v.20 no.1
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• pp.1-10
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• 2004

This study was executed to find the effects of dietary control and oral health care on dental caries and oral problems in elementary school students, including the effects of nutritional and oral health education on the prevention of dental caries. 1. The oral health study found that 88.9％ of students brushed their teeth everyday, 63.7％ 2 times a day, and 50.4％ in the morning and at night. 2. According to the general characteristics whether or not, the female students had more dental caries than the males, and 29.1％ of the students that had dental caries ate snacke 1 or 2 times a day. 3. After the nutritional education, more students brushed their teeth in the after meal 4. According to gender, grade and nutritional education for oral health care, male students and higher grade students were more aware that “brushing teeth after meals is better than before”. The male and higher grade students, after the nutritional education, were more aware that “Bones and teeth are made from calcium”, and “Fluorine prevents teeth from dental caries” and the differences between the genders were statistically significant in relation to both these facts (p〈0.05) and before and after education (p〈0.01). The male and higher grade students, and those nutritionally educated were more conscious that “vegetables and fruits are good for teeth”, with the differences before and after the nutritional education were statistically significant (p〈0.05). The male and higher grade students were well aware that “Foods that have sugar cause dental caries”, and significant differences were shown between grades (p〈0.05). The male and higher grade students, after the nutritional education and were well aware that “Milk is good for teeth”, with a significant gender difference (p〈0.05). The female and higher grade students, and those after nutritional education were well aware that “Dental caries can not be perfectly cured once it had already occurred”. after nutrition, but not much differences.

• Journal of the Korean Society of School Health
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• v.13 no.2
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• pp.295-317
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• 2000

This study was conducted to prevent oral disease of primary school, middle school, and high school students, providing basic data for the development of oral health education programs. Data were collected from 898 primary school, middle school, and high school students from March 2, 1999 to May 31, 1999. The results of this study are summarized as follows; 1) The subjects of this study were primary school students(32.6%), middle school students(33.0%), and high school students(34.4%). Boy students were slightly more prevalent than girl students. That is, primary school boys were 56.3%, middle school boys were 53.2%, and high school boys were 52.6%. 2) According to the self-judgement of oral health, primary school students were better than middle/high school students and boy students were better than girl students, 63.5% of primary school students and 57.8% of middle/high school students brushed their teeth once or twice a day. 3) 76.3% of middle/high school students and 63.5% of primary school students experienced dental caries. Girl students were higher than boy students in experiencing dental caries, 35.9% of primary school students and 27.6% of middle/high school students experienced periodontal disease. 4) 22.9% of primary school students and 7.9% of middle/high school students received oral examinations periodically. Girl students showed a higher rate than boy students in primary school, while boy students showed a higher rate than girl students in middle/high school. 5) Explaining to the reasons for reluctant visits to dental hospitals and clinics, 'no time to go' was highest(22.9% of primary school students; 27.4% of middle/high school students) and the rate of 'feeling scared' was second highest. Middle/high school students were more reluctant to visit dental hospitals and clinics than primary school students. In case of problematic symptoms in the mouth, the rate of 'feeling painful or cold in teeth when eating cold or hot foods' was highest, 71.3% of primary school students was concerned about oral health, while 68.6% of middle/high school students was concerned about it. 6) In gathering to the sources of information on oral health, the rate of medical institutions was highest(30.0%) in primary school students, while the rate of family members or persons around them was highest in middle/high school students. 7) 54.9% of primary school students received oral health education, while 13.1% of middle/high school students received it. Only 4.7% of middle school and high school girls received it. In relation to dental health education, the rate of 'possibility of prevention of oral caries or disease of the gum' was highest. 79.5% of primary school students and 80.3% of middle school students answered that they would attend oral health education. 8) 60.4% of primary school students and 60.2% of middle/high school students think the purpose of oral health is to prevent dental caries and disease of the gums. In preventing dental caries, 78.8% of primary school students and 71.8% of middle school students thought that periodical oral examination was effective, 88.4% of primary school students and 88.8% of middle/high school thought that brushing one's teeth was effective and 64.1% of primary school students and 50.7% of middle school students thought that the use of toothpaste containing fluoride was effective. In preventing periodontal disease, 91.1% of primary school students and 90.2% of middle/high school students thought that brushing one's teeth was effective, while 72.4% of primary school students and 70.3% of middle/high school students thought that teeth cleaning was effective. 9) 16.0% of middle school students and 12.7% of high school students thought that their oral health condition was healthy. According to individual experiences in dental treatment, the rate of experience of middle school students was higher than that of high school students, 12.7% of middle school students received oral examinations periodically, while only 3.3% of high school students did so. 10) In cases of 'having no problematic symptoms in the mouth' and 'concerns about oral health', the rate of middle school students was higher than that of high school students. In gathering obtaining information on oral health, the rate of obtaining it through broadcast media including TV, Radio, etc. was highest in middle school students, while the rate of obtaining it through family members or persons around them was highest in high school students. 11) 81.7% of middle school students have not received oral health education. In case of girl students, 97.3% have not received it in high school students. 85.6% of middle school students and 151.2% of high school students think that oral health education is necessary. 12) According to the knowledge level of oral health, the point of high school students($26.33{\pm}2.33$) was similar to the point of high school students($26.23{\pm}2.30$). It appeared that the point of primary school students was highest($26.35{\pm}2.50$) The more concerned about oral health the students were the higher the knowledge level of oral health was. In conclusion, the middle/high school students' knowledge level of oral health was lower than primary school students. The rate of middle/high School students' experience in oral health education was too low. Therefore, it is necessary to intensify oral health education for middle/high school students. Especially, the necessity of oral health education to girl students is strongly recommended. Developing an oral health education program for primary school, middle school, and high school students, related public authority and organizations, teachers; and dentists must actively make efforts together in order to maintain healthy teeth through having students prevent dental caries and periodontal disease.

• Journal of Korean society of Dental Hygiene
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• v.10 no.1
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• pp.157-172
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• 2010

Objectives : This study is to grasp the efficacy, locus of control, oral disease management beliefs, etc and to make a close inquiry the relevance between theses key figures and oral health promotion practice for a teacher and oral care about children and to provide the basic materials of oral health education for the teachers of infant nursery. Methods : This study was made from July to September in 2009 to nursery teacher by having the self-report questionnaire for teachers of infant nursery who are performing nursry school tearcher. Total 187 questionnaire were distributed and among these, 167 questionnaire excluding 20 questionnaire of incomplete responses were statistically analyzed with SPSS12.0. Results : The efficacy is highly in a married person(p=0.001) according to the teacher's age(P=0.006), perceived good oral status(p=0.001) according to the oral conditions and has the significant difference. The internal locus of control is highly in a married person(p=0.006) according to the teacher's age(P=0.037) and the marital status and has the significant difference statistically. The external locus of control is the highest(p=0.038) in the age of 40 among teacher's age and has the significant difference statistically. The oral disease management beliefs is the highest in the age of 20 ~ 29(p=0.001), highly in married(p=0.003) and has the significant difference according to the marital status and perceived good oral status(p=0.045) according to the oral conditions. There has no significant difference in the efficacy, the internal locus of control, the external Lotus of Control, oral disease management beliefs following by the infant oral care after taking medicines and oral care of infants after tooth brushing. Conclusions : Therefore, the oral health promotion activities should be induced by educating the nursery teacher and it needs to spread out the oral care education with the development to operate practically. It is considered in need of the infant oral care which is not burden on to the nursery teacher but helpful to the infant by connecting the subjects of dental hygiene and oral health education training.

• Journal of Korean society of Dental Hygiene
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• v.11 no.6
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• pp.973-983
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• 2011

Objectives : The oral care during early childhood plays an important role to maintain sound oral health during adulthood. As the number of children's using child care facilities is on the rise recently, the children's oral health awareness and behavior of the educators at nurseries and kindergartens are to be examined. Methods : A self-recording survey was conducted on 194 educators at the nurseries and kindergartens in Chungnam region. Results : The most frequently given snack was milk, 91.8 percent of the facilities had children brush their teeth, 63.4 percent made them apply fluoride and 56.2 percent kept children's toothbrushes in an ultraviolet rays sterilizer. There was a meaningful difference in the awareness of the necessity to educate children about oral health according to the offer of the opportunity to apply fluoride (p<0.05). A meaningful difference was found in the recognition of the necessity to educate children according to their grade (p<0.05) and to train teachers themselves (p<0.05). The most desirable persons in charge of oral health education were dentists in health centers (46.9%) in order. The more experience in teaching they have had (p<0.05), when they're married (50.5%) (p<0.05) and when they're not homeroom teachers (52.6 percent), the more regular checkups they have had (p<0.05). As for the importance of oral health and the results of regular checkups, those who had answered 'very important'(42.4%) showed higher rate of regular checkup (p<0.05) than those who had answered 'important'(23.9%). When teachers have the experience to get trained about oral care (96.3%), the practice frequency of brushing teeth was proved to become higher (p<0.05). Conclusions : The educators for children should recognize the importance of oral health education, educate children to practice oral health care, and the environment and systematic foundation should be established which the educators manage effectively.

• Journal of dental hygiene science
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• v.11 no.3
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• pp.163-171
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• 2011

This study aims to investigate the effect of four-week oral health promotion program operated through the cooperation between professionals and teachers of community child centers by reflecting characteristics of the centers and to suggest oral health promotion program applicable to community child centers. 4 community child centers has an enrollment of 119. 53 (44.5%) children completing the first and the second questionnaire survey were analyzed in this study. When dental plaque scores of 41 participants joining all of the first- to the fourth- week program and undergoing the dental plaque examination were compared before and after the oral health promotion program for community child center, the plaque control score was improved after the repeated education(p<0.05). Oral health knowledge and awareness of children in community child center were positive improved by oral health promotion program(p<0.05). And number of tooth-brushing a day improved by oral health promotion program. These findings suggest that there was a need for various oral health promotion program development in the community.

• Journal of dental hygiene science
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• v.11 no.3
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• pp.273-278
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• 2011

This study was performed to compare the status of oral care knowledge, oral care practice, and the patterns of the oral health care utilization before and during the pregnancy. It was conducted on the basis of a survey of 291 pregnant women who were in 9 post-natal care centers for post-natal care after delivery located in Daegu Metropolitan city and Changwon city of Gyeongsangnam-do from April 1st till April 29th on 2010. Forty five percent of them were experienced with the gum bleeding before pregnancy and 55.7% were experienced during pregnancy. The number of average tooth brushing per day was 3.05 times before pregnancy and 2.99 times during pregnancy in the survey. The patients who were experienced in dental health care during pregnancy out of the subjects for study were 51 for 17.5%. The score for the dental health knowledge was 7.82 for 10 grade scale and 5.38 before pregnancy and 5.14 during pregnancy for 10 grade scale in the actual performance scoring for dental care. Pre-dental care, experience in activity restriction due to dental disease, concern about oral health and regular visit to dental clinic were significant associated with use of dental care services during pregnancy.

• Journal of dental hygiene science
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• v.12 no.1
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• pp.55-62
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• 2012

The purpose of this study was to obtain database for development of education and programs of dental examination in industries. survey and dental examination was conducted by dental hygienist and dentist, and the data from 1016 respondents were analyzed. The result obtained was as follows: 1. Dental disease was 58.2% among 1,016, there was most a lot of peridontal disease, and overlapping disease, dental caries, missing tooth, fracture and abrasion, in order. 2. Utilization of dental care was 40% for last six months, it was significant high that age and working periods, married in marriage state, and unhealthy in subjective dental health state. 3. It was significant high that woman, fourty ages, middle economic state and working periods in above three times of tooth brushing a day. 4. Utilization of dental hygiene auxiliary devices was 41.8%, it was significant high that age, marriage state, economic state and working periods. 5. As for relationship between dental disease status and dental health behaviors, a person without periodontal disease was significant high in above three times a day, and a person without extraction, a person with fracture and abrasion, a person without overlapping disease was significant high in utilization of dental hygiene auxiliary devices.

• Journal of dental hygiene science
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• v.13 no.2
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• pp.174-181
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• 2013

The objective of this research is to compare and analyze regional accessibility of Korean primary school students to oral health services from the perspective of public health geography by using geographic information system in which the choropleth map has been regarded as the most popular method. Statistical proximity on the basis of calculus of 205 regions-based school oral health data is optimized to set five class intervals for five maps. These choropleth maps of oral heal programs such as oral health education, tooth-brushing method education, preventive dental care and curative dental care, demonstrate that there exist wide regional discrepancies throughout the country in terms of primary school students' accessibility to oral health services within the programs. The paper not just contributes to overcoming the existing paradigm by actively considering an interdisciplinary research among public health dentistry, dental hygiene and geography of public health, but provides clear evidence for national oral health policy in South Korea.