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The prediction of the tooth size in the mixed dentition for Korean
Moon, Sung-Hwan,Kim, Seong-Oh,Yu, Hyung-Seong,Choi, Byung-Jai,Choi, Hyung-Jun,Lee, Jae-Ho 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.2
이번 연구의 목적은 혼합치열기 아동에서 미맹출된 견치와 소구치의 크기를 예측하는데 있어서 한국인에 맞는 방정식을 만들기 위함이다. 미맹출 치아의 크기를 예측하는 것은 혼합치열기 교정 진단과 치료계획 수립에 있어서 매우 중요하다. 미맹출된 견치와 소구치 크기를 예측하는 방법은 몇가지가 있지만 그중에서도 가장 흔하게 쓰이는 것이 모이어의 예측표와 다나카와 존스턴의 방정식이 있다. 하지만 그것들은 백인을 위해서 제작된 것이고 치아 크기는 인종에 따라서 다르다고 알려져 있다. 이번 연구에서는 치아크기를 측정하여 하악 영구 절치의 크기 합과 견치 및 소구치의 크기 합 사이의 상관관계를 구하고 회귀방정식을 이용해서 한국인에 맞는 예측표를 만들었다. 연세대학교 치과대학에 재학중인 178명의 한국 학생(남 108명, 여 70명, 평균연령 21.63)을 대상으로 실험하였다. 영구치의 근원심 폭경을 석고모형상에서 calipers를 이용해서 측정하였다. 성별간의 치아 크기는 차이가 있었다(p<0.05). Correlation coefficient는 0.57에서 0.64의 범위였고, standard errors of the estimates 는 여성에서 0.6으로써 남성보다 우수하였다. r^(2)값은 0.27에서 0.41의 범위를 나타내었다. Estimating the size of unerupted teeth is an essential aspect of orthodontic diagnosis and treatment planning in the mixed dentition. Several methods were introduced and used for the prediction. The most common methods among these would be Moyers probability chart and Tanaka and Johnston equations. These are currently used widely, but they were developed for Caucasians. Because there are clear racial differences in teeth size, the objectives of this study were to produce correlation coefficients between the combined mesiodistal widths of the permanent mandibular incisors and those of the canines and premolars for each quadrant, and prediction tables with regression equations, specifically for Korean. 178 young adults (70 women, 108 men, mean age 21.63 years) were selected from the College of Dentistry, Yonsei University, Seoul, Korea. The mesiodistal crown diameters of the permanent teeth were measured with calipers. Significant sexual dimorphism was found in tooth sizes. The correlation coefficients between the total mesiodistal width of the mandibular permanent incisors and those of the maxillary and mandibular canines and premolars were found to be between 0.52 and 0.64. The standard error of the estimatation was better (0.60) for women and the r^(2) values ranged from 0.27 to 0.41 for both sexes, Prediction tables were prepared for Korean. This study showed larger canine and premolar diameters than Tanaka and Johnston's and Moyers' studies which might be due to the racial differences. Further investigations with a larger sample size will be needed for more representative data on the Korean population.
Primary intraosseous carcinoma of the mandible
Hwang, Eui-Hwan,Choi, Yong-Suk,Lee, Sang-Rae 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4
A very uncommon tumor, primary intraosseous carcinoma (PIOC), is a carcinoma arising within the jaw. The definite diagnosis of PIOC is often difficult as the lesion must be distinguished from alveolar carcinoma that may invade the bone from the overlying soft tissues or from the tumors that have metastasized to the jaw from a distant site. A case of PIOC arising in the mandible is presented. The clinical, radiologic, and histologic features are described. This rare lesion should be considered in any differential diagnosis of a jaw radiolucency.
( Sung Bum Cho ),( Yen Joo Kim ),( Won Hyung Choi ),( Chung Hwan Cheon ),( Ki Hoon Lee ),( Nam Kyu Zang ),( Jin Woong Kim ),( Young Eun Joo ),( Sung Kyu Cho ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.-
Background: Liver abscess was very rare but serious complication lead to liver failure and fatal outcomes after transarterial chemoembolization (TACE) for hepatocellular carcinoma (HCC). This study was evaluated to clinical features of TACE related liver abscess and predicting risk factors among HCC patients who developed postembolization syndrome after TACE. Methods: From January 2008 to December 2010, 13 patients of liver abscess which was undergone percutanous drainage developed in 2582 sessions of TACE. There was retrospectively analyzed to clinical features and predicting risk factors of liver abscess compared with control group who was selected 181 patients with fever after TACE. Results: The incidence of liver abscess was 0.5%. The etiologic types were necrosis related abscess (7 cases, 54%), biloma related abscess (4 cases, 31%), indirect abscess (2 cases, 15%). The mean interval time between percutanous drainage and TACE was 51±38 days. The positive culture rate was 69 % (9 cases) and organisms were enterococcus (4), Klebsiella pnemumoniae (2), Escherichia coli (1), Citrobacter (1) and Clostridium difficile (1). Abscess group was more higher peak AST level, peak bilirubin level, single nodular type HCC, Choledocholithiasis, air forming tumoral necrosis than control group. Independent predicting risk factors to abscess was only large air forming tumoral necrosis. The overall mortality rate of abscess was 61%. 6 patients were died caused by directly related to abscess. Conclusions: TACE related liver abscess was fatal infectious complication related to extensive air forming tumoral necrosis. The clinician should be considered to possibility of developing abscess in HCC patient with high risk factors after TACE.
Choi, Kyung Mook,Park, Hye Soon,Han, Jee Hye,Lee, Jee Sung,Lee, Juneyoung,Ryu, Ok Hyun,Lee, Kye Won,Cho, Kyung Hwan,Yoon, Dokyong,Baik, Sei Hyun,Choi, Dong Seop,Kim, Seon Mee Lippincott Williams Wilkins, Inc. 2006 Journal of hypertension Vol.24 No.8
OBJECTIVE: The present study aimed to determine the prevalence of prehypertension and hypertension, and their association with the risk factors in a Korean population. DESIGN: The Korean Nation Health and Nutrition Survey 2001, a cross-sectional survey, was a nationally representative survey in which a stratified multistage sampling design was used. METHODS: Data from a comprehensive questionnaire, together with a physical examination and blood sample, were obtained from 6074 Korean adults (2620 men and 3454 women) aged ≥ 20 years, and analysed. RESULTS: The estimated age-adjusted prevalence of hypertension and prehypertension was 22.9% (26.9% in men, 20.5% in women) and 31.6% (41.9% in men, 25.9% in women), respectively, in the Korean population according to Joint National Committee 7 criteria. Multivariate analysis revealed that age, gender, body mass index, fasting plasma glucose, total-cholesterol and alcohol consumption were significantly associated with hypertension. Overall, only 30.2% of the hypertensive individuals had been previously diagnosed. Furthermore, 22.9% of the hypertensive individuals were being treated with antihypertensive medication, but only 10.7% had their blood pressure adequately controlled. The rates of awareness, treatment and control were higher for the women than for the men, and these rates increased with age. CONCLUSION: Hypertension and prehypertension are common in Korea, and more than one-half of the hypertensive patients have not been diagnosed. These results place great emphasis on the urgent need for a public health program to improve the detection, prevention and treatment of hypertension and prehypertension.