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조사현,양규호,김수지 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3
This report presents a case of adolescent patient who had multiple impacted teeth and no systemic disease, and was treated with removable and fixed orthodontic appliances. The results obtained through these cases were summarized as follows: 1. Even in the case without systemic disease, there can be the delayed eruption of multiple teeth. 2. If the root formation is not completed, root have no excessive curvature, axial inclination of the tooth is not excessive, and there is eruption space, the tooth can be induced to normal occlusion. 3. Since esthetically proper occlusion and dentition was acquired by recovery of the impacted teeth ot normal occlusion, the prosthodontic treatment after extraction of the impacted teeth was less needed. 4. This treatment brought psychological stability to pubertal patient who was interested in his facial profile.
이보영(Bo Young Lee),지동현(Donghyun Jee),대한안과학회 역학조사위원회(Epidemiology Survey Committee of the Korean Ophthalmology Society) 대한안과학회 2016 대한안과학회지 Vol.57 No.2
목적: 포도의 섭취와 당뇨망막증의 유병률과의 연관성을 알아보고자 하였다. 대상과 방법: 국민건강영양조사 2008‐2011 중에서 30세 이상이면서 당뇨병을 가지고 있는 1,555명을 대상으로 하였다. 포도 섭취 빈도는 식품 섭취 빈도 조사법을 기준으로 조사하여, 지난 1년간 평균 포도 섭취의 빈도를 10단계로 나누어 평가하였다. 당뇨망막증은산동 후에 7장의 표준망막사진을 얻어 분석하였다. 당뇨망막증을 Airlie House 분류체계에 따라서 전체 당뇨망막증, 증식 당뇨망막증,그리고 실명위험 당뇨망막증으로 나누어 분석하였다. 결과: 당뇨망막증은 16.9 ± 1.2%에서 발견되었다. 포도 섭취 빈도가 1단계 증가함에 따라 전체당뇨망막증은 14% 감소하였고(odds ratio [OR] 0.86, 95% confidence interval [CI] 0.75‐0.98), 증식 당뇨망막증은 35% 감소하였으며(OR 0.65, 95% CI 0.48‐0.88), 실명위험 당뇨망막증은 23% 감소하였다(OR 0.77, 95% CI 0.60‐0.99). 포도 섭취 빈도가 한 달에 1회 미만일 경우에 비하여 한 달에 2‐3회섭취할 경우에, 전체 당뇨망막증은 46% 감소하였고(OR 0.54, 95% CI 0.33‐0.89), 증식 당뇨망막증은 75% 감소하였으며(OR 0.25,95% CI 0.07‐0.81), 실명위험 당뇨망막증은 64% 감소하였다(OR 0.36, 95% CI 0.13‐0.95). 결론: 포도 섭취가 증가할수록 당뇨망막증의 유병률이 감소하였다. Purpose: To evaluate the association between grape intake and diabetic retinopathy. Methods: A population-based cross-sectional study using a nation-wide, stratified, multistage, clustered sampling method included 1,555 subjects aged ≥30 years who participated in the Korean National Health and Nutritional Examination Survey 2008-2011. All participants performed standardized interviews, food frequency questionnaires (FFQ), and comprehensive ophthalmic examinations. Grape intake was evaluated by an FFQ using 10 intervals of average frequency of grape intake during the past year. Diabetic retinopathy (DR) was evaluated by 7 standard retinal fundus photographs after pharmacological pupil dilatation. DR was classified as any DR, proliferative DR, or vision-threatening DR by the modified Air House classification system. Results: The prevalence of diabetes was 16.9 ± 1.2%. As the grape intake frequency increases in FFQ, the odds ratio (OR) for any DR, proliferative DR, and vision-threatening DR were 0.86 (95% confidence interval [CI], 0.75-0.98), 0.65 (95% CI, 0.48-0.88), and 0.77 (95% CI, 0.60-0.99) respectively. Compared to the group with a grape intake of less than once per month, the OR for any DR, proliferative DR, and vision-threatening DR in the group with a grape intake of more than 2-3 times per month were 0.54 (95% CI 0.33-0.89), 0.25 (95% CI 0.07-0.81), 0.36 (95% CI 0.13-0.95), respectively. Conclusions: The intake of grapes was inversely associated with the prevalence of DR.
김수민,조사현,조세인,계기성,여환호,김영균,정재현 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1
We experienced 152 endosseous implant surgery and prosthodontic restoration with edentulous jaw for 5 years from Mar. 1990. to Oct. 1995. 422 fixtures were implanted. the ratio of male to female was 1.38 : 1 and the range of age from 16 to 74 years. Most dominant group was 41 to 50 years group(36%). In our study, implant success rates showed 96% in mandible and 92% in maxilla. The major causes of implant failure of primery osseointegration(75%), overloading(15%), neurologic problem(5%), psychologic problem(5%).
Al 2013-T8 합금에서 Zr 첨가에 따른 기계적 특성 분석
백민숙,조사현,박만복,윤동주,허기복,Baek, Min-Sook,Cho, Sa-Hyeon,Park, Man-Bok,Yoon, Dong-Joo,Heo, Ki-Bok 한국재료학회 2016 한국재료학회지 Vol.26 No.8
In this study, the recently developed Al 2013 alloy was T8-tempered and, to improve the strength and corrosion-resistance, slight amounts of Zr of 0.2 wt% and 0.5 wt%, respectively, were added and the mechanical properties were analyzed. For microstructure and precipitate analysis, OM observation, XRD analysis, and TEM analysis were performed, and for the mechanical property analysis, hardness and tensile strength tests were done. Also, in order to determine the corrosion rate according to the Zr content, a potentiodynamic polarization test was performed and the properties were compared and analyzed. The size of the precipitate varied with the content of Zr and was finest at Zr content of 0.2 wt%; it grew larger at 0.5 wt%, at which point the hardness value accordingly showed the same trend. On the other hand, as calculated from the aspect of chemical bonding among atoms, it was confirmed that the tensile strength and the corrosion-resistance increased with the same trend.