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.

Angiotensin Ⅱ로 유도된 혈관신생에 대한 日川芎의 억제효과

文成一,金亨煥,趙貞姬,安德均,崔湖榮 대한본초학회 2002 大韓本草學會誌 Vol.17 No.2

Objective : To estimate the angiogenic effect of water extract of Cnidii Rhizoma (ECR), we employed the rat sponge model for angiogenesis. Methods : It was based on subcutaneous implantation of sterile polyester sponges in the SD rat and we have characterized the dye method that incorporates 5% carmine red and 1% cresyl violet in 10% gelatin. vascularity index (V.I.) expressed as ㎍ dye/mg tissue. Subcutaneous implantation of sterile polyester sponges in SD rats enhanced the neovascularization over 14 days, as determined by measurements of relative sponge blood flow by a vascularity technique. The angiogenic response was verified by histological evaluation of vascularized sponges. Results : Daily oral administration of ECR (100 mg/kg for 14 days) produce no apparent effect on angiogenesis. The vasoconstrictor peptide, angiotensin Ⅱ (AⅡ), in daily doses of 100 nmol, caused an intense neovascularization but lower doses of AⅡ produced no apparent effect (1 nmol and 10 nmol). Co-administration of 100 nmol AⅡ and 100 mg/kg ECR p.o. depressed 100 nmol AⅡ-induced angiogenic effect. Conclusion : We have shown that p.o. daministration of 100 nmol AⅡ accelerated angiogenesis. Meanwhile, co-administration of 100 nmol AⅡ and 100 mg/kg ECR highly suppressed angiogenic property.

물시멘트비 및 단위수량에 따른 고품질 재생잔골재를 사용한 재생콘크리트의 공학적 특성에 관한 실험적 연구

문형재,송민섭,김재환,장종호,김용로,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

The purpose of this study is to investigate and analyze experimentally and positively engineering properties of recycled concrete using high quality recycled fine aggregate according to w/c ratio and unit water contents. And it is intend to present fundamental data for the mix design and the improvement of quality. The results are as follows; According to the increase of W/C ratio, the addition ratio of superplasticizer was reduced, the strength of compressive and tensile showed low and carbonation depth and chloride penetration depth showed high. And according to the increase of unit water contents, the addition ratio of superplasticizer was reduced, the strength of compressive and tensile showed low and carbonation depth and chloride penetration depth showed high.

자발성 기흉을 동반한 폐림프관평활근종증 1예

안용환,정종훈,김소영,김휘정,김학렬,양세훈,최순호,문형배,조향정,정은택 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.1

Electron Cyclotron Resonance O_2 Plasma에서 증착한 규소 산화 박막의 특성

안명환,서문석,장재선,서성모,이기방,윤창주,이형재,남기석,최규현,손춘배,김용섭,강석희 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.17 No.-

규소 산화막을 ECR-CVD(electron cyclotron resonance-chemical vapor deposition) 증착방법으로 5인치 기판위에 상온에서 증착하고, 증착공정조건인 증착율, 기판온도, 마이크로파의 세기변화 및 플라즈마 혼합기체의 비에 따른 규소 산화막의 특성을 조사하였다. 또한 산화막의 구조적인 특성을 비교하기 위해 FTIR을 이용하여 ECR-CVD 증착한 산화막, RPE-CVD(remote plasma enhanced-CVD) 증착한 산화막 및 열 산화막의 stretching frequency를 측정하였다. 측정된 결과 ECR-CVD로 증착된 산화막이 구조적인 면에서 열 산화막과 거의 같음을 보였다. ECR-CVD로 증착된 산화막의 전기적인 특성을 전류-전압 및 축전-전압 측정에의하여 분석하였다. 축전된 산화막의 전기적인 특성은 산화막의 전하 밀도는 1×10 exp (11)/㎠이였고, 평균 절연 파괴 전압은 약 6 MV/㎝이다. We have grown thin films of SiO_2 at room temperature by using an ECR-CVD system and have investigated the changes in the properties of the deposited films with changes in the processing conditions such as the deposition rate, the substrate temperature, the microwave power and the plasma gas mixing ratio. We also measured the stretching frequency of three kinds of oxides, and ECR-CVD-grown oxide, a PECVD-grown oxide, and a thermally grown oxide, using FTIR analysis to compare their structural properties. The result shows that the structural properties of the ECR-grown oxide are similar to those of the thermally grown oxide. Additionally, the electrical properties of the ECR-grown oxide were investigated by using current-voltage and capacitance-voltage measurements. These electrical results indicate that the oxide charge density and the average breakdown voltage are 1×10 exp (11) ㎝^-2 and 6 MV/㎝, respectively.

영아의 상순에 발생한 유피낭종

김성오,문성환,이제호,최형준,최병재 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.3

유피낭종(dermoid cyst)은 표피형태의 상피세포로 이루어진 낭종의 벽에 피부부속조직을 포함하는 발생학적 낭종이다. 눈썹 부근이나 구강저의 중심선에 호발하지만 혀, 입술, 협점막의 병소도 보고된 바 있다. 이 병소는 천천히 커지고 무통성이며 임파선비대는 동반하지 않는다. 내용물은 피지성, 화농성등이며 크기는 수 mm에서 12cm까지 다양하다. 조직학적 특징은 상피세포 이장과 낭종벽내의 땀샘, 피지샘, 모낭동의 피부부속조직의 존재이다. 유피낭종의 치료는 완전절제이다. 완전한 절제시 재발의 가능성은 거의 없다. 본 증례의 2세 여자 환아는 1년 전에 넘어진 이후 상순에 딱딱한 것이 생겼다는 것을 주소로 연세대학교 치과대학병원 소아치과에 내원하였다. 임상 구강검사 결과 둥근 고무질감의 종괴가 상순에서 관찰되었다. 조직학적 검사를 위해 조직생검을 시행하였으며, 낭종의 벽에서 피지샘이 관찰되었다. 이에 상순에서는 드물게 발생하는 유피낭종으로 진단되어 보고하는 바이다. Dermoid cyst is a developmental cyst that is lined by epidermis-like epithelium and contains dermal adnexal structures in the cyst wall. Dermoid cyst most occur in the eye brow although occasionally develop in other locations such as midline of the floor of the mouth, tongue, lip and buccal mucosa. The lesion is slow growing and painless without lympadenopathy. The contents of the dermoid cyst can be caseous or sebaceous. The size can vary from a few millimeters to 12cm in diameter. Histologically, dermoid cyst is lined by epidermis and adnexaes such as sweat gland, sebaceous glands and hair follicles are present in the cyst wall. The 2-year-old female of this case visited Department of Pediatric Dentistry, College of Dentistry, Yonsei University with a chief complaint of the emergence of mass on her upper lip. An excisional biopsy was carried out for a histological examination and sebaceous gland was observed in the cyst wall. The lesion was diagnosed as dermoid cyst. Delmoid cyst does not recur if complete excision is accomplished.

고카라트 Au-Zn-Pt 합금의 등온시효경화 거동

이희경,박영환,문희만,이정은,김형일 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

The isothermal age-hardening behavior of a high carat Au-Zn-Pt alloy was investigated by means of hardness test, X-ray diffraction study, microscopic observation and electron probe micro analysis. By the isothermal ageing of the solution-treated specimen at 300∼400℃, the hardness increased slowly at the initial stage of ageing and reached a maximum hardness values at 300∼400℃ was similar and suitable to use as the crown & bridge. By the isothermal ageing of the solution-treated specimen at 300∼400℃, three phases of the Au-rich α_1 phase with face-centered cubic structure,the Pt_3Zn a_2 phase with an ordered AuCu_(L1_2) type(f.c.c) and the Pt-rich a_3 phase with face-centered cubic structure were transformed into three phases of the α_1 phase, the α_3 phase and the PtZn β phase with an ordered AuCu I(L1_0) type. The hardening seemed to be attributed to the lattice strains of the matrix resulting from the transformation of the a_2 phase to the β phase. The overageing with softening was attributed to the coarsening of the nodule precipitates which seemed to be composed of the β phase and α_1 matrix.

림프질 전이가 있는 하인두암과 하부식도암의 진단에 활용된 내시경초음파 유도하 Trucut 생검 1예

광명옥,이정환,문정섭,김유선,류수형,총배천,김형훈,김현태 仁濟大學校 白病院 2010 仁濟醫學 Vol.31 No.-

The incidence of double primary cancer is about 10% in all kinds of cancers. Double primary cancer is usually accompanied by gastrointestinal cancer. Esophageal cancer is supposed to be frequently accompanied by squamous cell carcinoma of the head and neck or the upper respiratory tract, because of such common carcinogens as smoking and alcohol ingestion. Esophageal cancer and hypopharyngeal cancer are usually diagnosed by esophagogastric endoscopy with biopsy. We performed endoscopic ultrasound-guided Trucut biopsy(EUS-TCB) to diagnose a mediastinal mass in a 49 year-old patient, who visited our hospital because of voice change. During procedure, we accidently found enlarged celiac lymph node, and obtained tissue from the mediastinal lymph node and the celiac lymph node. We confirmed double primary cancer of squamous cell carcinoma in the esophagus and the hypopharynx via esophagogastric endoscopy.

前腕部 經穴 取穴에서 骨度分寸法과 一夫法의 比較 硏究

박히준,채윤병,차웅석,박종배,이혜정,이향숙,인창식,고형균,김수영,최일환,김강식,문정배,배기태,유경환,육근영,정병주,손인철,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-

Background : The cun measurement System, an essential and convenient method in locating acupoints, has been widely used in the practice of acupuncture. However, traditional cun measurement has been criticized for its lack of reliability. Objectives : The purposes of this study are to determine if one cun measured by the directional methods have a consistency with that of proportional methods and to investigate which factors are related with these differences, especially in forearm. Methods : The distance between the elbow crease and the wrist crease of forearm was compared to a reference value of one cun obtained by the directional method. In this method, one cun is one third of the distance between index finger and Small finger of a subject, measured at proximal interphalangeal joint. In addition, to investigate the factors influencing the differences between these two methods, we measured the height and body weight and calculated body mass index (BMI). Finally we analyzed the factors correlated with these lengths by linear regression test. Results : The results showed that one cun obtained by the directional methods were significantly different from one cun by the proportional methods in forearm. It was demonstrated that the length acquired with the directional method was more correlated with body weight and body mass index, while the length obtained by the proportional method was more correlated with the height.

Asymptomatic Arterial-Venous Fistulas Following Cadaveric Liver Transplantation in a Adult: A Case Report

( Hyung Hwan Moon ),( Musheer Shafqat ),( Dong Hoon Shin ),( Young Il Choi ) 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1

Aims: Intrahepatic arterioportal fistula is a rare but treatable cause of portal hypertension following liver transplant. Results: In the present case report, a 62-year-old female underwent cadaveric liver transplant for chronic hepatitis B with severe liver cirrhosis 8 years ago. Her immediate liver transplant post-operative course was complicated by episodes of acute cellular rejections. After then, this patient underwent percutaneous liver biopsies from the right anterosuperior area using a Tru-cut needle under ultrasound guidance before post transplant rejection therapy; however, no complications were encountered during procedures. Her episodes of acute cellular rejection responded to steroid therapy. After then this patient was performed routine follow-up for 8 years. An CT performed at this time showed a some vascular lesion in the superior aspect of the liver with turbulences and a mixture of arterys and portal veins consistent with an AV fisulas. The percutaneous liver biopsy of the right lobe, which was suspected to be causally related to the formation of the fistula. Follow-up endoscopy showed no esophageal and gastric varix. Her most recent liver enzymes are normal. She has no clinical symptom and sign and so the decision was made to watch and wait rather than intervene.