• 한국치위생학회지
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• 제22권5호
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• pp.347-354
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• 2022

Objectives: This study aimed to evaluate the relationship between pit and fissure sealants of the molars, and caries prevalence and experience to assess the effect of sealants on caries prevention. Methods: Data from 16,119 people were extracted from the seventh Korean national health and nutrition examination survey, which was conducted from 2016 to 2018. Demographic, socioeconomic, oral health-related behavioral, and oral examination survey data were collected as independent variables. SAS statistics for complex samples and multiple logistic regression analysis (Windows ver. 9.4) was used for the statistical analyses. Results: Caries prevalence and experience were significantly associated with age, sex, daily toothbrushing frequency, interdental cleaning, and having molar sealant. Multiple logistic regression analysis revealed a significant association between having molar sealants and the caries prevalence and experience among participants under 30 years of age after adjusting socio-economic variables and toothbrushing-related factors. Conclusions: This study confirmed the effect of molar sealants on caries prevention in Korea. Our results support that the application of molar sealants in children, adolescents, and young individuals is effective in preventing caries.

• 한국지형학회지
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• 제18권3호
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• pp.21-36
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• 2011

암석의 풍화작용은 지형발달에 있어 물질의 준비과정으로서 역할을 한다. 이 중 동결-융해작용은 한대지역이나 주빙하 지역뿐만 아니라 심지어 온대지역에서도 암석을 파괴시키는데 효과적인 프로세스로 여겨져 왔다. 화강암(생암, 반풍화층), 편마암, 석회암, 돌로마이트의 슬랩시편 각각 10개를 -25℃~+30℃의 조건으로 동결-융해를 180회 반복하고 이들의 풍화양상과 물리적 특성변화를 검토한 결과, 파쇄는 대기와 토양조건보다는 침수조건에서 좀 더 활발히 진전되었으며 공극률이 높은 석회암과 돌로마이트가 가장 심하게 파쇄되었다. 편마암은 표면에 crack, joint, fissure들이 발달해 있고 암석강도(SHV)가 가장 낮았음에도, 어떠한 물리적 변화나 풍화산물들이 생성되지 않아 풍화에 저항력이 매우 높은 암석으로 나타나고 있다.

• Tuberculosis and Respiratory Diseases
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• 제47권1호
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• pp.66-76
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• 1999

연구배경: 비소세포성 폐암에서 장측 흉막 침범은 CT로 평가된 적이 드물고, CT상 기관지혈관속 비후는 병리적으로 확인되는 적이 드물다. 이들 침범양상이 국소적 재발과 원격 재발 그리고 생존에 영향을 미치는 요인을 분석하고자한다. 방법: 1986년에서 1995년까지 NSCLC로 근치적 수술을 시행 받은 434예 중에서 적어도 18개월에서 최장 103개월까지 추적 관찰하여 국소적 재발과 원격 전이 그리고 생존 여부를 확인한 81예를 대상으로 하였다. 장측 흉막 침범 여부 그리고 동측 폐엽 기관지혈관속 비후 여부에 따른 국소적 재발과 원격 전이 그리고 생존에 미치는 영향을 분석하였다. 장측 흉막 침범의 평가를 위해 고해상도 전산화 단충 촬영을 시행하고, 흉막이나 폐열에 근접한 종괴가 있었던 32예를 가지고 장측 흉막 침범 여부에 대한 고해상도 전산화단층촬영의 유용성을 알아보았다. 결과: CT상 종괴가 폐열을 건너간 경우에 장측 흉막 침범 진단에 대한 각각 높은 양성, 음성 예측도를 보였다(100%, 100%). 종괴와 면한 열이 종괴와 붙어 있거나 누르고 있는 경우 중에 불규칙한 변연을 보이는 2예에서는 모두 장측 흉막 침범을 보였다. 병리학적으로 확인된 장층 흉막 침범 여부는 국소적 재발에 유의한 차이가 있었고 (p<.05), 생존율에도 차이가 있었다(p<.05). CT상 동측 폐엽 기관지혈관속 비후 여부는 국소적 재발과 원격재발 모두 유의한 차이가 없었으나, 생존율에는 유의한 차이가 있었다(p<.05). 결론: 창측 흉막 침범 여부 그리고 CT상 동측 폐엽 기관지 혈관속 비후 여부는 재발와 생존에 영향을 미치는 요인으로 확인되었다. 따라서 장측 흉막 침범에 대한 CT의 분석과 기관지혈관속 비후의 병리학적 확인은 폐암환자의 예후 추정에 중요하다.

• 대한두개안면성형외과학회지
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• 제10권2호
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• pp.67-70
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• 2009

Purpose: Anatomical basis around orbit can be helpful in periorbital surgery, and there are many articles about measurement between periorbital reference points. In 1967, Jones and Evans measured the orbital wall thickness of Asian cadavers and this article has been cited more than 50 times. But there is no research in orbital thickness in Vivo. Author's idea was based on difference between live human and human cadaver. Material & Method: We conducted this study from 63 consecutive blow out fracture patients between January, 2000 to june, 2005 by collecting the bone fragments and measured the thickness of that fragment using vernia calipers. Anatomically, orbital floor is separated two area by inferior orbital fissure and we measured each area. Three areas were zone I (medial wall), zone II (medial to inferior orbital fissure) and zone III (lateral to inferior orbital fissure). Result: When the overall results were considered, the thickness of Zone I (medial wall of orbit) was average $0.131{\pm}0.006mm$ in male and $0.129{\pm}0.007mm$ in female and Zone II (medial side of orbital floor) was $0.251{\pm}0.005mm$ in male and $0.245{\pm}0.006mm$ in female, Zone III (lateral side of orbital floor) was $0.237{\pm}0.006mm$ in male and $0.226{\pm}0.006mm$ in female. There were no statistical difference between orbital wall thickness of male and female. Also, orbital wall thickness of adults measured $0.130{\pm}0.005mm$, $0.250{\pm}0.005mm$, $0.232{\pm}0.006mm$ in Zone I, Zone II, Zone III and $0.128{\pm}0.006mm$, $0.233{\pm}0.005mm$, $0.215{\pm}0.007mm$ in Zone I, Zone II, Zone III from childs, and there were no statistical difference between adult and child. Conclusion: This article is the first study about Korean orbital wall thickness, and can be helpful to periocular surgery.

• 한국안광학회지
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• 제7권2호
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• pp.33-39
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• 2002

18세에서 30세 중반 사이의 남자 35명 여자 21명 총 56명을 대상으로 2시간 동안 VDT 작업을 하도록 한 후, 안구 및 전신 증상 등을 조사하고 순목 횟수, 눈물층파괴시간(BUT), 안검열의 높이, 시력, 타각적 굴절력, 조절력 등을 측정하였다. 안구증상에서는 눈의 피로를 느끼는 사람이 34%로 가장 많았고 시기능증상에서는 물체가 흐려 보이는 증상이 83%, 전신증상에서는 어깨가 아픈 사람이 38%로 가장 높게 나타났다. VDT 작업 중의 순목 횟수가 8/min로 휴식 때의 22/min에 비해 많이 감소했다. VDT 작업 직후의 눈물층파괴시간도 약 7초로 작업 전의 약 12초보다 현저히 감소되었다. 안검열의 높이는 작업 전 7.69mm보다 작업 중에는 9.04mm로 증가하였다. 평균 나안시력은 VDT 작업 전에 0.63에서 작업 후에는 0.57로 약 9.5% 감소하는 경향을 보였고, 타각적 굴절이상은 0.28D 정도 근시화 경향이 보였다. VDT 작업 후 조절력은 1.49D 정도 감소하였는데 주로 조절근점 굴절력의 감소가 원인인 것으로 보인다. 폭주근점 굴절력도 0.87D 감소하였다.

• 대한소아치과학회지
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• 제45권3호
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• pp.299-306
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• 2018

본 연구의 목적은 산부식 시간과 접착제 적용에 따른 유구치 치면열구전색제의 미세인장 결합강도를 평가하여 비교하는 것이다. 40개의 발거된 건전한 하악 유구치를 선정하여 산부식을 시행하지 않은 군과 산부식을 각각 15, 30, 60초 시행한 군으로 분류하였다. 이를 다시 접착제를 적용하지 않은 군과 적용한 군으로 나누었다. 각 군의 치아에 치면열구 전색제를 도포하여 시편을 제작한 후 미세인장 결합강도를 측정하였다. 산부식을 시행한 15, 30, 60초에 따라 미세인장 결합강도는 유의한 차이가 없었다. 전색제를 적용하기 전에 접착제를 적용한 경우가 산부식만 시행한 경우보다 더 높은 결합강도를 보였으며(p < 0.05), 산부식 시간에 따른 유의한 차이는 없었다. 결론적으로, 유구치의 교합면 법랑질에서 산부식 시간이 15초 이상이면 전색제의 미세인장 결합강도는 유의하게 증가하지 않았으며, 치면열구전색제 도포 전에 접착제를 적용하는 것은 결합강도를 증가시켰다.

• 한국치위생학회지
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• 제1권2호
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• pp.201-211
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• 2001

Dental caries causes the majority of tooth loss among Koreans. Korea is experiencing an increase in dental caries. And it shows a high prevalence of caries in preschool children, which contrasted with the much-improved situation in developed countries. So, it is important to control caries from preschool periods in Korea. Recently, inspections of the teeth of preschool children for evidence of dental disease became a legislative duty in Korea following Oral Health Act(2000). But, standardized oral health programs in preschool children is not yet proposed. Therefore, it is necessary to develop an community based oral health program in preschool children. The purpose of this study was to obtain basic data for the development of community based oral health program in preschool children of Sungnam city. Oral health status in primary dentition were surveyed in 862 2-6 year-old preschool children of Sungnam city by WHO criteria. From the data, df rate, percentage of preschool child ren with active caries, dft index, dt rate, percentage of preschool children with pit and fissure sealant of each age were calculated, and discussed. The obtained results were as follows : 1. The experience of dental caries in primary dentition showed a tendency to increase quickly between 2 and 3 year old children. So, the oral health program in preschool children should be developed to prevent dental caries and control their oral health under three years of age. 2. In 5 year-old children, the percentage with active caries was 60.8% and dft index was 5.06. The dt rate showed a tendency to decrease as proportion to age, but even though 6 year-old children, the dt rate was 47.7%. Therefore, the annual screening dental examination and oral health education programs at the institution for preschool children should be developed to detect and treat dental caries in primary dentition at early stage. 3. The percentage of preschool children with pit and fissure sealant at six years of age was 10.2%. So, pit and fissure sealant and professional fluoride application programs in Public Health Center should be developed to prevent dental caries. 4. Also, it is necessary to establish oral health goals in preschool children and develop water fluoridation program 10 improve and preserve oral health of preschool children in Seongnam city, effectively.

• 대한소아치과학회지
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• 제28권3호
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• pp.522-529
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• 2001

본 실험은 소아치과에서 널리 이용하고 있는 우식예방법인 불소도포가 치면열구전색재와 법랑질과의 결합에 미치는 영향을 알아보는 것이다. 1, 2, 3, 4군은 unfilled sealant인 Teethmate A(Kuraray, Japan)를, 5, 6, 7, 8군은 filled sealant인 Ultraseal XT(Ultradent, U.S.A.)를 이용하였고 1군과 5군은 불소로 전처리를 하지 않았으며 2군과 6군은 1.23% APF인 60 second taste(Pascal Company, U.S.A.)로 전처리하고 3군과 7군은 2.0% NaF인 Swirl(Biomedica Concepts, U.S.A.)로 전처리하였으며 4군과 8군은 불소를 함유한 세마재인 Nupro(Johnson & Johnson Consumer Product Inc., U.S.A.)로 치면세마를 시행하였다. 준비된 시편은 산부식한 후 직경 3mm, 높이 2mm의 몰드를 이용하여 30초간 전색재의 중합을 시행하였고 열순환 후 전단강도를 측정하였다. unfilled sealant의 경우 각 군간에 유의한 차이가 없었지만 filled sealant의 경우 5군과 8군에 비해 6군과 7군은 유의하게 낮은 결합강도를 나타내었다(p<0.05).

• 대한약침학회지
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• 제21권3호
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• pp.139-150
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• 2018

Averagely 80% to 90% of breastfeeding women experience the nipple pain and fissures. The important factor for successful breastfeeding is to treat this problem. This study has done as a review with the aim of analysis of the clinical trials in the field of the prevention and treatment of the nipple fissures and pain due to the importance of breastfeeding. For this purpose, the key words of sore, nipples, fissure, trauma, wound, prevention, treatment, therapeutics, therapy, clinical trial, breastfeeding and their Persian synonyms and all of their possible combinations were searched in the national databases: SID and Iran Medex and Magiran, and in the international databases: PubMed, Scopus, Medline, Science direct by May 2017. The Jadad criterion was used to assess the quality of the articles and the articles with a score of 3 or more were included in this study. Finally, 48 clinical trials were reviewed that 17 of them (sample size 1801) scored 3 or more based on the Jadad criterion. Seven articles were also in the non- drug treatment group (sample size 491) and 2 articles in the drug treatment group (sample size 337) and 8 articles in the herbal treatment group (sample size 973).The results show that menthol and warm water compress as well as teaching the correct breastfeeding methods are effective treatments to prevent and treat the nipple pain and fissures. Moreover, applying the herbal medicine for prevention and treatment of the issues raised from breastfeeding may have beneficial such as Aloe vera, Portulaca olearacea. However, more studies with a great methodology are necessary to obtain more accurate evidence.

• 대한치과의사협회지
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• 제56권4호
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• pp.194-207
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• 2018

Objectives: The water fluoridation program has been implemented since 2008 at the Daesan water treatment plant, Changwon City. The aim of this study is to evaluate caries preventive effect of permanent teeth from community water fluoridation program Methods: Evaluation surveys were conducted on 8-, 10- and 12-year olds in the fluoridated and non-fluoridated area of Uichang-gu and Seongsan-gu, Changwon City in 2015. The number of the subjects in 2015 was 722 in fluoridated area and 707 in non-fluoridated area. The caries preventive effect of permanent teeth by community water fluoridation was estimated by the differences in adjusted DMFT and DMFS scores between the program and control groups. Cofounders of mean number of fissure-sealed teeth or surfaces, and number of subjects by gender were adjusted to estimate the caries preventive effect of permanent teeth. Results: The mean DMFT score or DMFS score of children aged 8-, 10- and 12-years adjusted for the number of fissure-sealed teeth or surfaces in fluoridated area were significantly lower than those in non-fluoridated area in 2015. The caries preventive effect of permanent teeth estimated based on the difference of mean DMFT scores adjusted for fissure-sealed teeth, age and number of subjects by gender between control and program group among children was 37.3%. Conclusions: These results suggest that the caries preventive effect of permanent teeth from water fluoridation program at Daesan water treatment plant, Changwon City was so high that the water fluoridation program should be developed in other regions in Korea.