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오염된 유치 상아질에 대한 자가 부식 프라이머의 결합강도에 관한 연구
서주희,이광희,김대업,Seo, Ju-Hee,Lee, Kwang-Hee,Kim, Dae-Eup 대한소아치과학회 2002 大韓小兒齒科學會誌 Vol.29 No.1
연구목적은 자가부식 프라이머의 적용 시기에 따른 타액과 혈액 오염에 대한 결합력에 미치는 영향을 알아보는 것이었다. 유치 시편을 각각 10개씩 제작하여 대조군, 접착전 타액 오염, 접착제 중합후 타액 오염, 접착전 혈액 오염, 접착제 중합후 혈액 오염된 상황으로 2가지 종류의 자가부식 접착제와 복합레진을 적용하여 만능 물성 시험기로 전단결합강도를 측정, 분석하였다. 접착제 적용전 타액 오염(I군)시에는 대조군과 비교하여 결합력이 유사하거나 약간 감소되었으나, 통계학적 유의한 차이가 없었다(P>0.05). 접착후 타액 오염(II군)이나 접착 전후의 혈액 오염(III, IV군)시 유의하게 결합력이 감소하였다. (P<0.01). Clearfil SE Bond가 AQ Bond보다 유의하게 높은 결합강도를 보였다(P<0.05). The purpose of this study was to determine and compare the shear bond strength of two self-etching primer systems to primary teeth contaminated with saliva and blood. Clearfil SE Bond and AQ Bond were evaluated. One hundred specimens were made by seventy-five deciduous teeth(fifty anterior and twenty-five posterior teeth) and divided randomly into ten groups. Small flat dentinal surfaces were prepared by grinding the buccal, lingual and labial areas. Specific surface treatments were applied to each group: (1) a self-etching primer application(control group), (2) saliva contamination followed by primer(Group I), (3) primer curing followed by saliva contamination (Group II), (4) blood contamination followed by primer(Group III), (5) primer curing followed by blood contamination(Group IV). After bonding of composite resin(Z100, 3M, USA) to contaminated sample surfaces and thermocycling(1,000 cycles), shear bond strengths were measured using Universal Testing Machine(Zwick Z020, Zwick Co., Germany). The results were as follows; 1. Group I showed lower shear bond strength than control group but no statistically significant difference was found(P>0.05). 2. Group II and blood contamination group(Group III & IV) showed significantly lower shear bond strength than control group(P<0.01). 3. The shear bond strength of Clearfil SE Bond was significantly higher than that of AQ Bond(P<0.05).
Face mask를 이용한 유치열기 골격성 반대교합의 치료
서주희,이광희,김대업,이지영,Seo, Ju-Hee,Lee, Kwang-Hee,Kim, Dae-Eop,Lee, Ji-Young 대한소아치과학회 2002 大韓小兒齒科學會誌 Vol.29 No.1
III급 부정교합은 서양인에서 약 5%의 발생빈도를 보이며, 일본인과 한국인에서 교정환자중 50%정도로 증가하는 추세이다. 이런 III급 부정교합자의 63%가량이 상악골의 열성장 또는 상악골의 열성장과 하악골의 과성장에 의한 것이라고 알려져 있다. 일반적으로 환자의 나이가 많을수록 악정형력보다는 치열에서의 변화량이 크므로 치료는 조기에 시행하는 것이 바람직하다고 하였다. 조기치료시 성장조절, 환자의 협조도, 치료의 관리와 같은 결정요소들을 잘 판단하여 시행함으로써 상악골의 더 많은 전방이동이 가능하며 정상 성장을 도모하고 교합관계가 증진되며 안모의 개선으로 인해 정상적인 사회 심리적 발육이 이루어질 수 있다. 본 증례는 반대교합을 주소로 원광의료원 치과병원 소아치과에 내원한 유치열기 환아에게 facemask를 이용한 조기 치료로 양호한 결과를 얻었기에 보고하는 바이다. The prevalence of Class III malocclusion is approximately 5% in the Caucasian population, rising to as mush as 50% in the Japanese and Korean population. Recent studies have suggested than 63% of this malocclusion display maxillary retrusion. If left untreated, the malocclusion tends to worsen. Consequently, early treatment is commonly indicated to obtain a more normal jaw relationship. This report is 2 cases treated patients who diagnosed as skelectal Class III malocclusion due to deficient maxilla using facemask.
초등학교 저학년을 대상으로 한 융합인재교육(STEAM) 프로그램 개발 및 적용 효과
서주희,신영준 경인교육대학교 과학교육연구소 2012 과학교육논총 Vol.25 No.-
This study established below research problems in order to suggest a new teaching and learning plan and examine the effects to the lower grades of elementary school through an assimilated approach of the 2007 revised curriculum. As a result of this study, first, the scientific class in which STEAM was applied didn't influence very much the formation of scientific content knowledge of the lower grades of elementary school. However, according the characteristics by student, it could be understood that it is effective to the formation of scientific content knowledge for a short time of period. Second, the scientific class in which STEAM was applied influenced the interest of the lower grades of elementary school in the science class and the formation of scientific interest and confidence in science learning. Based on these results, it can be considered that the scientific class in which STEAM was applied influenced the interest of the lower grades of elementary school in science and science learning and confidence improvement.
오염된 유치 상아질에 대한 자가 부식 프라이머의 결합강도에 관한 연구
서주희,이광희 원광대학교 치의학연구소 2002 圓光齒醫學 Vol.11 No.1
Objective: The purpose of this study was to determine and compare the shear bond strength of two self-etching primer systems to primary teeth contaminated with saliva and blood. Materials and Methods: Clearf l SE Bond and AQ Bond were evaluated. One hundred specimens were made by seventy-five deciduous teeth(fifty anterior and twenty-five posterior teeth) and divided randomly into ten groups. Small flat dentinal surfaces were prepared by grinding the buccal, lingual and labial areas. Specific surface treatments were applied to each group: (1)a self-etching primer application(control group), (2)saliva contamination followed by primer(Group Ⅰ), (3)primer curing followed by saliva contamination (Group Ⅱ), (4)blood contamination followed by primer(Group Ⅲ), (5)primer curing followed by blood contamination(Group Ⅳ). After bonding of composite resin(Z100, 3M, USA) to contaminated sample surfaces and thermocycling(1,000 cycles), shear bond strengths were measured using Universal Testing Machine(Zwick Z020, Zwick Co., Germany). Results: The results were as follows; 1. Group Ⅰ showed lower shear bond strength than control group but no statistically significant difference was found(P>0.05). 2. Group Ⅱ and blood contamination group(Group Ⅲ & Ⅳ) showed significantly lower shear bond strength than control group(P<0.01). 3. The shear bond strength of Clearfil SE Bond was significantly higher than that of AQ Bond(P<0.05).
서주희,김승업,박준용,김도영,한광협,전재윤,안상훈 연세대학교의과대학 2013 Yonsei medical journal Vol.54 No.1
Purpose: Refractory ascites (RA) is closely related to a high morbidity and mortality. In this study, we investigated predictors of RA development in patients with hepatitis B virus (HBV)-related cirrhosis who were hospitalized to control ascitic decompensation,and determined predictors for survival in patients who experienced RA. Materials and Methods: We analyzed 199 consecutive patients with HBV-related cirrhosis who were hospitalized to control ascitic decompensation between January 1996 and December 2008. Results: Multivariate analyses showed that only serum potassium at admission predicted RA development independently [p=0.013; hazard ratio (HR), 2.800; 95% confidence interval (CI), 1.166-6.722]. During the follow-up period, 16 (8.0%) patients experienced RA within 4.2 (range, 1.0-39.2) months after admission for controlling ascitic decompensation, and they survived a median of 8.7 (range, 3.9-51.3) months. Child-Pugh class and RA type were identified as independent prognostic factors affecting the survival in patients with RA (p=0.045; HR, 8.079; 95% CI, 1.231-67.984 and p=0.013; HR, 14.510; 95% CI, 1.771-118.874, respectively). Conclusion: Serum potassium was an independent predictor of RA development in patients with HBV-related cirrhosis who were hospitalized to control ascitic decompensation. After RA development, Child-Pugh class and RA type were independent predictors for survival.
An 18-year experience of tracheoesophageal fistula and esophageal atresia
서주희,김도연,김대연,김성철,김인구,김기수,윤종현,피수영,김애란 대한소아청소년과학회 2010 Clinical and Experimental Pediatrics (CEP) Vol.53 No.6
Purpose: To determine the clinical manifestations and outcomes of patients with tracheoesophageal fistula (TEF) and esophageal atresia (EA) born at a single neonatal intensive care unit. Methods: A retrospective analysis was conducted for 97 patients with confirmed TEF and EA who were admitted to the neonatal intensive care unit between 1990 and 2007. Results: The rate of prenatal diagnosis was 12%. The average gestational age and birth weight were 37+2 weeks and 2.5±0.7 kg,respectively. Thirty-one infants were born prematurely (32%). Type C was the most common. The mean gap between the proximal and distal esophagus was 2 cm. Esophago-esophagostomy was performed in 72 patients at a mean age of 4 days after birth; gastrostomy or duodenostomy were performed in 8 patients. Forty patients exhibited vertebral, anorectal, cardiac, tracheoesophageal, renal,limb (VACTERL) association with at least 2 combined anomalies,and cardiac anomaly was the most common. The most common post-operative complications were esophageal stricture followed by gastroesophageal reflux. Balloon dilatation was performed for 1.3 times in 26 patients at a mean age of 3 months. The mortality and morbidity rates were 24% and 67%, respectively, and the most common cause of death was sepsis. The weight of approximately 40% patients was below the 10th percentile at 2 years of age. Conclusion: Mortality and morbidity rates of patients with TEF and EA are high as compared to those of infants with other neonatal surgical diseases. Further efforts must be taken to reduce mortality and morbidity and improve growth retardation.
마키베리(Aristotelia chilensis)의 안토시아닌 색소를 이용한 모발 염색 특성
서주희,박철호 대한미용학회 2019 대한미용학회지 Vol.15 No.3
The purpose of this study is to examine the potential utility of anthocyanin pigments from maquiberry for natural hair dyeing under different experimental conditions. The levels of hair dyed and maquiberry color change were measured at the maximum absorption wavelength of anthocyanin following exposure to varying dyeing temperature, dyeing time, and pH. Several mordants were used, and the mordanting effect and colorfastness were investigated in accordance with the mordanting method and mordant concentration. As the dyeing temperature and dyeing time increased, the K/S increased and L* decreased; the K/S were in the 37.139-63.584 range. Anthocyanin pigments had the highest K/S value (63.334) and a* value (2.480) at pH 4. Anthocyanin pigments are especially sensitive to pH, and K/S decreased with increasing pH. Based on the K/S value only, pre-mordanting with FeSO4, MgSO4, MnSO4, AlK(SO4)2, CH3COOH, Co(NO3)2, CaCO3, Na2CO3 was effective; only CuSO4 was effective for post-mordanting. The changes of K/S values at mordant concentrations were 63.701 for 1% FeSO4 and 66.537 for 10% and 20% CuSO4. AlK(SO4)2 and Co(NO3)2 showed high K/S changes of 67.541 and 66.537 at 20%, respectively. The color fastness to washing decreased with repeated shampooing. The K/S was in the 60.144-38.646 range after washing. The results presented herein suggest that maquiberry may be useful to be used as a hair dye.