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이개부 병변을 가진 하악 대구치의 치료에 있어 치근절제술과 터널화의 임상결과 비교
김철우,박진우,서조영,이재목,Kim, Cheol-Woo,Park, Jin-Woo,Suh, Jo-Young,Lee, Jae-Mok 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.1
Purpose: The resective treatment in mandibular Degree III furcation areas includes root resection and tunnel preparation. The purpose of this retrospective study is to evaluate which treatment procedure(root resection vs tunnel preparation) has more favorable prognosis in mandibular Degree III furcation involvement. Materials and methods: The subjects of this study were patients who were treated their mandibular posteriors with either root resection(22 teeth on 22 patients) or tunnel preparation(24 teeth on 22 patients) and have participated in periodic recall check program for at least 2 years. Failure rate, plaque index, bleeding on probing and probing pocket depth were measured and the results were compared and statistically analysed. Results: Failure rates of root resection and tunnel praparation were 13.6% and 16.7%, respectively, and showed no significant difference between two procedures. No significant differences were observed between two procedures with respect to plaque index, bleeding on probing and probing pocket depth. Conclusion: root resection and tunnel preparation are both effective procedures to treat mandibular posterior furcation involvement, if adequate treatment of choice is made and patient's cooperation is accompanied. However, tunnel preparation is more preservative procedure in mandibular posterior furcation involvement since root canal treatment and prosthetic restoration are needed additionally, in case of root resection.
김철우,김영조,Kim, Cheol-Woo,Kim, Young-Cho 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.9
A measurement method of the particle-based reflective display is proposed, estimated, and compared with reported method. The reflectivity measurement by previous studies is simply obtained by integrating sphere, but it has a limitation for the estimation of real moving particles because its data include surface reflection and incomplete attachment on electrodes. To get the number of real moving particles, the area by attached particles on the electrodes is calculated at microscopic signals. The moving particles on subthreshold voltage are observed and this fluctuational variation of surface on subthreshold voltage gives a tip to understand the driving mechanism. By this measurement we ascertained the relationship of a particle layer and real driving particles, and the feasibility of observation and estimation for moving color particles, which were measured by the reflectivity and CIE (Commission Internationale de I'Eclairage) system of color specification at previous studies.
한국산 집먼지진드기 진중체 항원 알레르겐 표준화 : In vivo 방법에 의한 표준화
김철우,박중원,홍천수 (Cheol Woo Kim,Jung Won Park,Chein Soo Hong) 대한천식알레르기학회 1998 천식 및 알레르기 Vol.18 No.2
Backgound and objective. House dust mites have been known as the most important allergens in respiratory allergic disease. Since environmental factors may have influences on the pathogenesis of allergic disease, the study using Korean house dust mites for immune and biologic reactions in house dust mite-sensitive allergic disease is considered as significant. Material and method: We made two in-house allergenic extracts of Korean house dust mites (D. farinae and D. pteronpsssinus) and performed this study for the allergen standardization by in vivo methods and for the evaluation of the reliabilities for clinical applications. Result: As a results of biologic standardization using skin prick test teachnique, the activity of 1: 1,500w/v of D. farinae extract was estimated 1,000 biology unit(BU), concentration that elicits a wheal of the same size as that of histamine dihydrochloride 1mg/ml. The activity of 1: 1,000w/v of D. pteronyssinus was condiered as 1,000BU. The activity of 1:100w/v of both D. farinae and D. pteronpssiuns extracts were considered as 100,000 Allergy Unit(AU), based on intradermal skin testing of 30 subjects with strong sensitive reaction. The concordant rates between results of skin prick test done with 5,000BU/ml concentration of in-house allergenic extracts and thoae with the commercially available allergen(Bencard Co., UK) were 84.6% and 81.0% for D. farinae and D. pteronpssinus, respectively. The wheal erythema size and A/H ratios induced by in-house extracts were significantly correlated with those induced by Bencard allergen. Conclmion '. This results suggest that in-house extracts of the whole bodies of two house dust mites have good allergenic activities in vivo. It is considered to be clinically useful and reliable allergenic extracts.
김철우 ( Cheol Woo Kim ) 대한내과학회 2010 대한내과학회지 Vol.78 No.6
Although cough is a physiologic reflex of the respiratory tract clearing the airways, it is one of the most common complaints for medical attention. Chronic cough lasting for more than 8 weeks is a major clinical problem and responsible for large socioeconomic burden. The causes of chronic cough can be divided into two categorizes; airway and extra-airway disorders. Airway disorder causing chronic cough is comprised of upper airway disorder such as upper airway cough syndrome and lower airway disorders including asthma and non-asthmatic eosinophilic bronchitis (NAEB). This article reviewed airway disorders causing chronic cough. Most patients with chronic cough can be managed and cured by treatment of these underlying causes of chronic cough. In some patients, however, effective control of cough may require not only controlling underlying diseases but also desensitization of cough pathways because chronic cough is often associated with sensitization of cough pathways and an increased response to tussive agents. (Korean J Med 78:665-669, 2010)