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자동차 페인트 도장공에 있어서 컴퓨터를 이용한 신경행동검사 수행기능의 평가
사공준,정종학,Sa, Kong-Joon,Chung, Jong-Hak 대한예방의학회 1994 Journal of Preventive Medicine and Public Health Vol.27 No.3
A cross-sectional study was performed to evaluate the effects of chronic low-dose solvent on neurobehavioral performance of 118 male car painters. A control group of 113 workers matched for age was selected from different sections of the factory. The mean age and the mean duration of employment were 33 years and 6.7 years in both groups. Mean years of education were 11.4 years in car painters and 11.8 years in controls. Each worker completed a medical and occupational questionnaire and four tests of Swedish performance evaluation system. These included simple reaction time, symbol digit, digit span and finger tapping speed. Althougth the mean duration of employment was 6.7 years, comparison of mean performance showed a significantly poorer performance on simple reaction time (p<0.05), symbol digit(p<0.01) and digit span(p<0.05) in car painters. In univariate analysis, age and educational level contributed to poorer performance on symbol digit and digit span. Smoking appeared to slow finger tapping speed in car painters. Performance of four tests of car painters exposed to high level of solvent was poorer than that of car painters exposed to low level. In multiple regression models, controlling for age, alcohol, smoking and shift work, solvent exposure was found to be associated with performance of simple reaction time, symbol digit and digit span and exposure to high level of solvent was related to poorer performance of symbol digit and digit span.
사공준 ( Kong Joon Sa ),이승희 ( Seung Hee Lee ) 한국치위생학회 2012 한국치위생학회지 Vol.12 No.3
Objectives: School-age children have mixed dentition and are sensitive to dental caries. Their dental condition is more important as it is directly related with oral health in their life, and parents` attention and education are necessary as the children can not manage their oral health voluntarily. Methods: To evaluate the effect of parents` occupational status on the oral health of children, this study conducted a questionnaire survey and analyzed the results along with the results of oral examination with 952 students and their parents of an elementary school located in Ulsan conducting school oral health projects on May, 2009. Results: As dental caries prevalence rate recorded 33.7%, 56.8% and 66.9% in non-dual income, professional dual income and non-professional dual income families, respectively, the rate of children of dual income families was significantly higher than that of non-dual income ones (p<0.05). Conclusions: For professional dual income families, although working mothers contribute to economic stability, they took less time to care or to educate their children compared to no-working mothers so that they need to pay more attention to oral health of children. In addition, more interest to and education for children of non-professional dual income families showing relatively lower socio-economic level and lack of time for children, were also necessary in school projects on oral health education and prevention.
진혜정 ( Hye Jung Jin ),사공준 ( Joon Sa Kong ),송근배 ( Keun Bae Song ),전은숙 ( Eun Suk Jeon ),김기림 ( Ki Rim Kim ),최연희 ( Youn Hee Choi ) 한국치위생과학회 2015 치위생과학회지 Vol.15 No.2
The objective of this study is to estimate the relationship between amalgam removal and urinary mercury levels. To measure urinary mercury concentration, urine of participants was collected at baseline, immediately, 24 hours and 48 hours after removal of amalgam restorations. The statistical analysis was performed using IBM SPSS Statistics ver. 20.0. The overall mean urinary mercury concentration at baseline, immediately, 24 hours and 48 hours after removal of amalgam restorations was 2.77, 2.75, 2.95 and 4.00 mg/g creatinine, respectively. Logistic regression model shows that the gender leads to increased odds of high urinary mercury concentration in children (odds ratio, OR=1.99), even after adjusting for high amalgam surfaces (OR=1.23) and fish consumption (OR=1.26) at the baseline. Our findings suggest that mercury exposure from dental amalgam adversely impact health and therefore are a health risk.
이승훈 ( Seung Hun Lee ),사공준 ( Kong Joon Sa ) 한국치위생학회(구 한국치위생교육학회) 2015 한국치위생학회지 Vol.15 No.2
Objectives: The purpose of this study was to identify the effects of xylitol and sorbitol mouth rinse on the salivary caries activity levels. Methods: The study subjects were 38 female college students in Gyeongju, Korea. The subjects visited the institution once a week for 4 weeks and the saliva samples were measured for the amount of salivary caries activity levels. The saliva was collected 5 times and incubated in Mitis Salivarius Agar for 48 hours(VS-1203P3L, Vision, Korea) and measured. Results: The Streptococcus mutans CFU decreased by statistically significant amounts as compared to before the experiment within the xylitol group and the sorbitol group(p<0.01). After three weeks of mouth rinse application, Streptococcus mutans CFU of the xylitol group and the sorbitol group showed statistically significant differences(p<0.05). The salivary flow rates within the xylitol group and sorbitol group increased by statistically significant amounts(p<0.01) than before the test. The change in the salivary buffering capacity decreased by a statistically significant amount as compared to before experiment within the xylitol group(p<0.01). Conclusions: The salivary caries activity levels decreased after using xylitol and sorbitol mouth rinse in CFU and the flow rate. The buffering activity levels increased within the xylitol group. Further follow-up studies would be necessary to identify the various effects of xylitol.
아말감 충전물 제거와 뇨중 수은농도의 관련성 평가: 예비연구
백혜진 ( Hye Jin Baek ),사공준 ( Kong Joon Sa ),안서영 ( Seo Young An ),이희경 ( Hee Kyung Lee ),송근배 ( Keun Bae Song ),송근배 ( Youn Hee Choi ) 한국치위생학회(구 한국치위생교육학회) 2012 한국치위생학회지 Vol.12 No.2
Objectives : The aim of this study was assessment of the variation of urinary mercury concentrations after removal of amalgam fillings in children. Methods : 10 elemental school children with amalgam filling tooth surfaces were took part in this study. One dentist recorded the number of amalgam filling surface, and general characteristics of subjects were surveyed by questionnaire. Each urine samples were collected before, immediately after and after 24 hours amalgam removal. The statistical analysis was performed using the SPSS 18.0. Results : The mean concentration urinary mercury immediately after amalgam removal was higher (5.70±1.20 ㎍/g creatinine) than before amalgam removal (5.28±1.53 ㎍/g creatinine). The mean concentration urinary mercury level whose have 1-10 amalgam removal surfaces was increased after amalgam removal compared with before. Conclusions : Mercury concentration in urine was influenced by amalgam removal.
대도시지역 일부 초등학생의 치과용 아말감 충전치아와 요중 수은 농도의 관련성
정윤숙 ( Yun Sook Jung ),사공준 ( Sa Kong Joon ),안서용 ( Seo Young An ),이영은 ( Young Eun Lee ),송근배 ( Keun Bae Song ),최연희 ( Youn Hee Choi ) 한국치위생과학회 2012 치위생과학회지 Vol.12 No.3
Dental amalgam is an alloy composed of a mixture of approximately equal parts of elemental liquid mercury and an alloy powder. Amalgam has been the most popular and effective restorative material used in dentistry. Despite the long history and popularity of dental amalgam as a restorative material, there have been periodic concerns regarding the potential adverse health effects arising from exposure to mercury in amalgam. Since children are more at risk for mercury toxicity, we aimed to assess the association between dental amalgam filling and urinary mercury concentration in children. 581 of elementary school children in grades 1st4th were conveniently recruited from two schools located in Daegu city, Korea. To obtain dental caries experience states, oral examination were conducted using the full term for DFS index, number of amalgam filling surfaces and the type of filling materials. A questionnaire was used to collect information about general characteristics and the frequencies of tooth brushing, gum chewing and fish/seafood consumption. The statistical analysis was done using the SPSS 18.0 program. The mean urinary mercury concentration in children having more surfaces was highest. As a results Urinary mercury concentration of children who have 79 teeth of amalgam filling and more than 10 is higher than without amalgam filling. The number of amalgam filling surface is closely related with urinary mercury concentration.
어린이의 구강 내 아말감 충전물에 의한 수은노출과 뇨중수은농도: 6개월 추적조사
백혜진 ( Hye Jin Baek ),최연희 ( Youn Hee Choi ),사공준 ( Kong Joon Sa ),이영은 ( Young Eun Lee ),이희경 ( Hee Kyung Lee ),진명욱 ( Myoung Uk Jin ),송근배 ( Keun Bae Song ) 대한구강보건학회 2012 大韓口腔保健學會誌 Vol.36 No.4
Objectives: Dental amalgam is a widely used filling material for oral cavity. The released mercury vapor from amalgam could have systemic adverse effects potentially. The purpose of this study is to evaluate the relationship between dental amalgam and urinary mercury levels in children during a 6-month timespan. Methods: A total of 525 elementary school children participated in this study. Oral examination was carried out from one dentist. Urine samples collected at baseline and at 6 month were analyzed for mercury and creatinine excretion. Additionally, general characteristics of subjects were surveyed by a questionnaire. The statistical analysis was performed using the SPSS 18.0. Results: Greater amalgam surfaces were associated to higher urinary mercury levels; this tendency was similar at the 6-month observation after the correct baseline data. In the multivariable model, urinary mercury excretion was only associated with amalgam surfaces positively. Conclusions: Even a small amount of mercury uptake from dental amalgam has been associated to increase the mercury concentration of urine.
우리나라 일부 스쿠버잠수자의 잠수행태와 감압병 증상 경험률
오강진 ( Kang Jin Oh ),박재용 ( Jae Yong Park ),사공준 ( Joon Sa Kong ) 대한스포츠의학회 2008 대한스포츠의학회지 Vol.26 No.1
This study was performed to supply a database for an effective method for preventing Decompression Sickness and in taking care of scuba divers` health. The questionnaires about the characteristics and diving pattern of SCUBA divers were administrated to 1,734 divers who visited a diving shop for the purpose of diving itself and to some diving hobbyists. Mean age of divers was 35.1±7.4 years in professional group, 35.2±7.5 years in adults recreational group, 23.1±4.3 years in students recreational group, and 23.0% of divers were 40 years old and more. When divers were classified by BMI, 32.7% of divers were overweight and 29.8% of divers were obesity. It was found that 56.6% of divers were current smoker. Mean duration of diving was 5.1 years and duration of diving of 26.5% of divers were less than 1 year. Mean diving days per year were 29 days or less in 61.6% of divers. On the average, the divers dived 2 times a day with 40 minutes of diving time at 20~29 min depth. It was found that 5.7% of divers were diving without buddy diver. Only 37.1% of divers were observing decompression stop always during ascending and 42.6% of divers have experienced uncontrolled ascent. Not a few divers were having flight after diving. Musculoskeletal symptoms such as `pain in the upper and lower extremities` were experienced by 12.9% of the subjects. 8.1% of them experienced `dizziness or nausia`, 4.9% `cutaneous itching`, 3.3% `muscle weakness`, and 3.2% `hearing disorder`. The repetitive diving, uncontrolled ascent and flight after diving were proved as significant risk factors for decompression sickness related symptoms in scuba divers. Considering the diving patterns, most SCUBA divers have significant risk factors of decompression sickness. To prevent decompression sickness and diving accidents of SCUBA divers, regular and systematic education on diving safety as well as diving skill is required.
Effect of Environmental Tobacco Smoke (ETS) on Atopic Dermatitis
Ok-hee Yi(이옥희),Ho-Jang Kwon(권호장),Ho Kim(김호),Mi-na Ha(하미나),Soo-Jong Hong(홍수종),Yun-Chul Hong(홍윤철),Jong-Han Leem(임종한),Joon-kong Sa(사공준),Chul-Gab Lee(이철갑),Su-Young Kim(김수영),Dong-mug Kang(강동묵) 한국환경독성학회 2010 한국독성학회 심포지움 및 학술발표회 Vol.2010 No.11
안심연료단지 주변지역 주민의 호흡기계질환에 대한 설문조사 및 건강검진 결과 분석
이관 ( Kwan Lee ),임현술 ( Hyun Sul Lim ),김민기 ( Min Gi Kim ),민영선 ( Young Sun Min ),이영현 ( Young Hyun Lee ),김성우 ( Sung Woo Kim ),최혜숙 ( Hye Sook Choi ),안연순 ( Yeon Soon Ahn ),사공준 ( Kong Joon Sa ),유승도 ( Seung D 한국산업보건학회 2015 한국산업보건학회지 Vol.25 No.3
Objectives: This study was conducted to better understand the relationship between health effects and exposure to dusts from a briquette fuel complex in Ansim, Daegu, Korea. Methods: The subjects of this study consisted of 2,980 persons over 40 years old who had lived 20 years or more around a briquette fuel complex in Daegu. We conducted a questionnaire survey, and chest radiography was performed. In addition, chest computed tomography(CT) (335 cases) and pulmonary function test(PFT) (658 cases) were done. Pneumoconiosis was diagnosed if one of three radiologists determined(or suspected) pneumoconiosis. We also conducted in-depth interviews for pneumoconiosis cases. We defined the exposed group as subjects residing within a 500 meter radius from the walls of the briquette fuel complex, and the others were defined as the control group. Results: Subjects in the exposed and control groups are respectively 715(24%) and 2,265 cases(76%). Major respiratory symptoms in the exposed group such as sputum, dyspnea, chest tightness and wheezing were significantly higher than in the control group. By chest radiography, 173 cases of pneumoconiosis or suspicious pneumoconiosis were detected. By PFT, 62 cases(29.5%) of chronic obstructive pulmonary disease(COPD) among 210 asymptomatic subjects were detected. Finally, by chest CT we concluded 28 cases to be pneumoconiosis, and eight cases among them proved to be pneumoconiosis by environmental exposure. Conclusions: Through this study, we concluded that health outcomes such as respiratory symptoms, pneumoconiosis, and COPD were caused by continuous exposure to dusts from the briquette fuel complex. Policies to reduce environmental exposure are needed, and cases of environmental disease should be intensively followed up by the government.