http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김종현,심준성,이근우,Kim, Chong-Hyun,Shim, June-Sung,Lee, Keun-Woo 대한치과보철학회 2000 대한치과보철학회지 Vol.38 No.4
Before impression making in the fixed restorations or other prosthesis, hemostatic solutions are used for hemostasis and moisture control. Hemostatic solutions effectively control bleeding but their major ingredients, acid removes smear layers which are formed in the tooth preparation, exposes the dentinal tubular orifices which are occluded by smear layers, makes dentinal tubular fluid displace more easily to the various external stimulus, and according to the hydrodynamic theory, consequently causes dentin hypersensitivity. To know the effect of hemostatic solutions on dentin permeability, coronal dentin discs, 1mm in thickness, were prepared from extracted third molars free from decay and wear, and a split chamber device was used. Hydraulic conductance values and SEMs, which were measured before and after treatment with $Astringedentr^{(R)},\;Altract^(R)\;and\;Epri-dent^{(R)}$, were compared and ana-lysed. The following conclusions were drawn: 1. Hydraulic conductance values which were measured after the treatment of hemostatic solutions were increased in all groups(p<0.05). 2. %change values of hydraulic conductance were compared but no significant difference was found among the three hemostatic solutions(p<0.05). 3. On SEM observations of all groups, after treatment smear layers were removed and dentinal tubular orifices were partially exposed. On the basis of these conclusions, the reckless use of hemostatic solutions should be restricted, and when in use, various methods should be considered to protect dentin.
상악 중절치 삭제 시 수복 디자인과 변연부 위치에 따른 부피 변화
김종현,박영범,김성태,이근우,Kim, Chong-Hyun,Park, Young-Bum,Kim, Sung-Tae,Lee, Keun-Woo 대한치과보철학회 2011 대한치과보철학회지 Vol.49 No.2
연구 목적: 상악 중절치에 여러 가지 수복물 설계와 변연부 위치를 설정하여 치아 삭제를 하였을 때 나타나는 치아 삭제량의 변화를 평가하기 위함이다. 연구 재료 및 방법: 36개의 상악 중절치 레진 인공치가 실험에 사용되었다. 수복물의 디자인에 따라 이들은 4개의 군으로 나뉘었다. 그리고 각각의 군은 다시 변연부의 위치에 따라 3개의 세부 군으로 나뉘었다. 삭제되지 않은 치아의 부피가 미세단층촬영을 이용해 측정되었고 같은 방법으로 삭제 후의 치아의 부피가 측정되었다. 이 측정된 영상들을 서로 겹쳐서 비교함으로 삭제 전과 후의 부피 변화를 알아보았다. 결과: 수복물 설계에 따른 삭제 전과 후의 부피 변화량은 다음과 같은 순서로 변화량의 차이를 보였다: traditional laminate veneer < full laminate veneer < all ceramic crown < metal ceramic crown. One-Way ANOVA와 다중비교 Tukey로 유의수준5%에서 통계 분석한 결과 각각의 군에서는 다음과 같은 순서로 변화량의 차이를 보였다: CEJ 1 mm 상방 < CEJ < CEJ 1 mm 하방 (P<.05). 부피 변화를 백분율로 나타낸 수치를 보면 all ceramic crown과 metal ceramic crown 에서는 31 - 48% 로 나타났고 laminate veneer에서는 14 - 30%로나타났다. Laminate veneer에서 나타난 부피 변화량은 metal ceramic crown의 1/3로 나타났다. The full laminate (CEJ 1 mm 하방)와 all ceramic crown (CEJ 1 mm 상방)는 유사한 부피 변화를 보였다. Metal ceramic crown은 all ceramic crown과 비교하였을 때 13.7% 더 많은 부피 변화를 보였다. 결론: 수복물의 설계와 변연부 위치의 변화에 따라 부피 변화의 차이가 존재한다. Purpose: The aim of this study was to evaluate the volumetric change of teeth after preparation for various designs and margin locations through Micro CT analysis (Skyscan 1076: SKYSCAN, Konitch, Belgium). Materials and methods: The 36 artificial teeth were used to determine reduction volume of upper central incisor. According to the restorative design these 36 teeth were divided into 4 groups and according to the marginal location each group was divided into 3 subgroups. The volume of unprepared teeth was obtained by using Micro CT and the volume of prepared teeth was obtained in the same method. The CT scanned images before and after preparation were superimposed. Results: The volume difference was significantly increased as follows: traditional laminate veneer < full laminate veneer < all ceramic crown < metal ceramic crown. One-way ANOVA and Tukey multiple comparison analyses were used to analyze the data in this study. In each group the volume difference was significantly increased as follows: 1 mm above CEJ < CEJ < 1 mm below CEJ (P<.05). The % volume difference of all ceramic crown and metal ceramic crown was 31 - 48% and that of laminate veneer was 14 - 30%. The volume difference of the traditional laminate veneer was 1/3 of that of metal ceramic crown. The full laminate (1 mm below CEJ) and all ceramic crown (1 mm above CEJ) showed a similar volume difference. Metal ceramic crown showed 13.7% more volume difference than all ceramic crown. Conclusion: There exists the difference in volumetric change according to designs of restoration and margin locations of preparation.
김종현(Chong Hyun Kim),정명현(Myung Hyun Chung) 한국생약학회 1975 생약학회지 Vol.6 No.1
Attempts were made to determine the characteristics of the morphology of Codonopsis lanceolata TRAUT`s root. Its saponin and crude powder were examined by foaming and hemolytic tests and by observing transverse sections: 1) The cork-layer was consisted of multiple cells, and some of the cork cells contained monoclinic prism crystals of calcium oxalates. 2) The vascular bundle was formed of radial arrangement by the preminentic bursting pith and the irregular cambium ring with the abnormal growth. 3) The latex vessel and latex of the cortex were brown-gray or yellowish-brown. The latex vessel and sieve tube were consisted of the independent aggregates which had a number of layers. It had much more independent aggregates than Platycodi Radix. 4) The xylem was less than the phloem portion. The thick-walled vessels which had one to five lines ware more distributed than in Platycodi Radix. 5) The inulin distribution on a piece of section which is dipped in alcohol was observed through out the tissues, but starch grain was not found in it. 6) The duration time of foaming reaction of the crude powder in test tubes was shorter than that of Platycodi Radix. Foaming index of the foaming test of five percent decoctions was 3.33, 7) In the hemolytic test which used 10 percent decoction and one percent saponin solution, hemolytic action was very weak.
Stimulating Effect of Panax Saponins on the $C^{14}$-Leucine Incorporation
한병훈,김종현,한용남,Han, Byung-Hoon,Kim, Chong-Hyun,Han, Yong-Nam 생화학분자생물학회 1973 한국생화학회지 Vol.6 No.2
인삼에서 분리한 Panax Saponin A (protopanaxatriol 계)가 지효성 및 지속성의 anti-inflammatory activity를 나타내는 것은 이마 보고한 바 있다. 이 성분은 mouse의 간 및 혈청에서$C^{14}$-leucine의 동화를 촉진하였고 이 효과를 경시적으로 추구한 결 과 anti-inflammatory activity에 대한 경시적인 실험결과와 동일한 경향을 나타내었다. Maximum incorporation을 일으키는 시점 (투여후 4시간)에서 PSA (1~2 mg/mouse)는 $C^{14}$-leucine의 incorporation을 41 또는 61% 촉진하였고 이 효과는 부신피질 호르몬의 개입이 없이 일어난 것으로 밝혀졌다. Delayed and long-lasting characteristics of stimulating effect of Panax Saponin A, one of protopanaxatriol diglucoside of Korean ginseng, on the incorporation of labeled amino acid into liver and serum protein of mouse appear to be correlated with characteristics of anti-inflammatory activity of the substance. Intraperitoneal administration of PSA (1~2 mg/mouse) enhanced the incorporation rate of labeled amino acid into protein by 41~61% over that of control. At the time of maximum incorporation, The stimulating effect was proved not to be correlated with the intervention of corticak hormone.