수종 치과임프란트의 세포반응에 관한 연구

김기영,류선열,방몽숙 전남대학교 치과대학 1990 전남치대논문집 Vol.2 No.1

Recently, titanium, hydroxylapatitie-coated titanium have been widely used as dental implants. This study was undertaken to evaluate the cellular responses of mouse fibroblasts which cultured in MEM to the implants. Morphologic changes were observed and cell count and DNA contents were measured on the 1st, 3rd and 7th day. The results obtained from this study were as follows ; 1. The number of the cell was increased accordingly as time at monolater in all groups including control group. Morphologically, cell process and nucleus became prominent but macroscopic difference to the implants were not observed. 2. As a result of the cell count, there was increased in number of the cell with increasing time. On 1st day, there was no remarkable difference in each group. On 3rd day, control group showed the highest increase of cell number and nikel titanium implant group was higher than other group. On 7th day, increase of cell number was observed in all groups. Titanium implant group showed the highest and nickel titanium implant group were appeared as similar result. 3. In DNA contents meaurement, S and G_2M phase cell is less than 20% on 1st day and more than 20% on 3rd and 7th day. Especially, S and G_2M phase cell was measured 17% and 12% in the titanium and nickel titanium implant group on 1st day. 4. Cell size and DNA content were increased accordingly as time and the highest increase was observed in titanium implant group. These results suggest that all implant materials of titanium that used in this study didn't complicate proliferation of the cultured fibrollasts and are sutiable for the clinical use.

분광분석기를 이용한 치과용 콤포짓트레진의 착색도 측정

최기열,김철위 대한구강생물학회 1986 International Journal of Oral Biology Vol.10 No.2

The purpose of this study was to evaluate the staining property of dental composite resins in various solutions. Eleven kinds of dental composite resins were used in this study, five of them were chemically cured composite resins and the others were visible light cured composite resins. Specimens (diameter 20㎜, thickness 1.3㎜) were immersed in 2% of coffee solution, cola, distilled water, orange juice, soy sauce solution and tea solution for 1.2.3 and 4 weeks. The value of Hunter's color difference E)was measured by Spectrophotometer(MS-2000, Macbeth, U.S.A) with integrating sphere. From the experiment following results were obtained : 1. Staining tendencies of composite resins were higher in coffee, tea and soy sauce solution. 2. Composite resins were stained much after one week and thereafter the degree of staining was not much increased as in the first week. 3. Chemically cured composites showed higher tenency of staining than visible light cured composites. 4. Blended composites showed the highest value of staining, followed in order by convetional and microfilled composites. 5. Posterior composites showed higher value of staining than anterior and anterior/posterior composites and this was significant.

중·고 필드하키 선수들의 스포츠 상해에 관한 연구

하태열,이기광,정종윤 창원대학교 체육과학연구소 2002 경남 체육연구 Vol.7 No.2

중·고 필드 하키선수들에게 발생하는 스포츠 상해 유형을 규명하기 위하여 2000년 제1회 중·고 연맹 회장기 대회에 참가한 남·여 하키 선수 434명을 대상으로 한 설문 조사를 분석한 결과 다음과 같은 결론을 얻었다. 첫째, 상해 빈도는 신체 부위별로 다리, 팔, 머리, 몸통 순으로 나타났다. 남·여별로는 다리부위에서는 여자, 상지부위에서는 남자가 부상 빈도가 높게 나타났다. 학교별로는 팔, 다리 부위의 부상빈도에 있어서 고등학교가 중학교보다 높게 나타났다. 위치별로는 GK가 다른 위치의 선수들보다 상대적으로 팔부위의 부상 빈도는 높고 다리 부위의 부상 빈도는 낮은 것으로 나타났다. 둘째, 상해 증상에 있어서는 피부와 근육상해가 뼈와 관절 상해 빈도의 약 3~4배 정도로 높게 나타났다. 위치별로는 유의한 차이가 나타나지 않았으나. 남자와 고등학교가 여자와 중학교에 비해서 피부와 근 상해의 빈도가 높은 것으로 나타났다. 셋째, 상해 이유에 있어서 본인 부주의에 의한 상해원인은 남자는 지나친 승부욕, 여자는 정신력 부족이 가장 높게 나타났으며, 고등학교는 과도한 연습, 중학교는 정신력부족이 가장 높게 나타났다. 시설결함에 의한 상해원인은 모두 장비 불량으로 인해 상해발생이 가장 높게 나타났으며, 장소부적응에 의한 상해원인에 있어서 모두 타구장 부적응에 의한 상해발생률이 가장 높은 것으로 나타났다.

四君子湯 및 四物湯이 人體波動과 活性酸素에 미치는 影響에 關한 實驗的 硏究

조기용,柳同烈 대전대학교 한의학연구소 2000 한의학연구소 논문집 Vol.9 No.1

To prove the effect of Sagunjantang(SGJT) and Samultang(SMT) extract on the wave of Human Body and Active Oxygen experimentally, QRS & Free Radical of extract and precipitate of SGJT and SMT was measured. The results were summarized as follows; 1.SGJT extract and precipitate, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & pituitary gland. 2.BaekBokRung of SGJT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of heart & spleen. 3.BaekChul and Gamcho of SGJT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of stomach & duodenum. 4.YinSam of SGJT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & spleen. 5.SMT extract and precipitate, as a result of measuring QRS and Free radical, had a considerable effect on the function of immunity & uterus. 6.SukJiHwang of SMT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & liver. 7.DangGui of SMT, as a result of measuring QRS and Free Radical, had a considerbale effect on the function of heart & spleen. 8.ChunGung of SMT, as a result of measuring QRS and Free Radical, had a considerbale effect on the function of spleen & pituitary gland. 9.BaekJakYak of SMT, as a result of measuring QRS and Free Radical, had a considerbale effect on the function of stomach & duodenum. 10.SMT extract had an effect on the function of female Urogenital system,SGJT extract had an effect on the function of male Urogenital system. These results suggested that SGJT and SMT extract might be usefully applied for suppresing of Active Oxygen formation, preventing the aging, curing all the disease resulted from Active Oxygen.

인체 지방 및 간장조직 중 유기염소제류 및 PCB의 확인 및 정량기법 체계화 : 2차년도

이상기,양자열,김기욱,이수연,오승민,김대현,정규혁 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

한국인 20대남녀 정신질환자의 타액성 우식유발요인에 관한 비교연구

최기열,박상숙 국립서울정신병원 1986 臨床硏究論文集 Vol.1986 No.-

오존 처리된 TiO2 나노튜브 분말로 제조된 광양극의 염료감응형 태양전지 특성

천기영,박민우,성열문 경성대학교 공학기술연구소 2008 공학기술연구지 Vol.15 No.-

Membranes of TiO2 nanotube arrays were produced by potentiostatic anodic oxidation of 100㎛ thick Ti plate The anodization was performed under constant potential of 60V at ~22℃ for up to 96 hours Electrolyte used was an Ethylene Glycol(EG) solution with an addition of H2O (2.0 vol. %) and NH4F (0.3 wt.%) TiO2 nanotube arrays having lengths of ~200㎛ were grown in vertical direction to the Ti plate TiO2 nanotube membrane was grinded to produce fine particles of nanotubes TiO2 nanotube particles were treated with ozone to improve dye attachment A slurry made with the TiO2 nanotube particles was coated onto transparent conducting oxide(TCO) by doctor blade method to produce dye-sensitized solar cells(DSCs) Electrical properties of the DSC cells were haracterized.

외과적 보조의 급속상악확장술 : 치험 5예 REPORT OF 5 CASES

박충열,이용욱,송종운,김영운,박홍주,오희균,유선열,이기현,황현식 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.1

Five adults (3 cases of bilateral posterior crossbite, 2 cases of unilateral posterior crossbite) with intermaxillary discrepancy of over 5㎜ due to maxillary transverse deficiency were treated by surgically assisted rapid maxillary expansion (SARME). Bilateral maxillary horizontal osteotomies, osteotomies of pterygomaxillary junction and anterior lateral nasal wall, ans anterior palatal osteotomy were performed in 4 cases, and unilateral osteotomies in 1case, followed by palatal expansion with tooth-borne orthopedic applicance. No significant complication was observed. The mean palatal expansion was 7.2㎜ (5.8∼10.0㎜) in the maxillary first molar region. During the mean follow-up period of 4 years (5 months∼8 years 7 months), no recurrence of crossbite was observed in all cases. The SARME seemed to be a simple, stable, and reliable procedure for achieving a permanent increase of over 5㎜ in skeletal maxillary transverse width of adults.

팔공산 화강암지역 지하수에 대한 지구환경화학적 연구

李基完,朴喜烈 東新大學校 1997 論文集 Vol.9 No.-

Recently, the importance of groundwater is higher as the use of groundwater for drinking, agriculture and industry sisnificantly increases. However, groundwater has been contaminated by industrial waste, domestic sewage, landfill leachate and seawater intrusion. Therefore, it is necessary to understand the chemical characteristics and water-rock interaction of groundwater for the preservation of groundwater resources. The purpose of this study is to find out the magnitude of groundwater contamination, and its water-rock interaction characteristics in granitic regions. The Cretaceous Palgongsan granitic regions are selected as the study area. The results are as follows : Groundwater is contamimated by NO_3^- in a Part (CP-3, CP-4, CP-5) of study region. K^+/Na^+ in groundwater of study legion is equivalent to 1/10 for K_2O/Na_2O of rock. Groundwater's evolution is being progressed to noncarbonate hardness tupe of Ca^2+ -HCO_3^-, continuously noncabonate alkali type of Ca^2+, Cl^-, SO_4^2-. Saturation index of aluminosilicate minerals for groundwater is dominated kaolinite. This indicates the initial evolution process of groundwater.

가토에서 하악골 신연 양에 따른 하치조신경의 조직학적 변화

김기영,류선열 전남대학교 치과대학 1998 전남치대논문집 Vol.10 No.1

The purpose of this study was to evaluate the histologic change of the inferior alveolar nerve according to distraction amount following mandibular lengthening. Seven rabbits weighing about 4 kg were used. Corticotomy was performed on the mandibular body area anterior to the right first premolar region. A unilateral external fixation device was placed. Every effort was made to preserve the inferior alveolar nerve during the corticotomy. The rabbits were then allowed to heal for 7 days without distraction of the device. The mandible was lengthened 0.36 mm/day, 0.76mm/day or 1.0 mm/day. Corticotomy and lengthening of Mandible were not perofrmed in control group. After the completion of the lengthening process, a 14-day-consolidation period was allowed. After consolidation, rabbits were sacrificed, and histologic examination of the inferior alveolar nerve was performed. The results obtained were as follows : 1. In the control group, normal trifascicular pattern of inferior alveolar nerve was observed. Epineurium, perineurium, endoneurium, and axon with myelin sheath were observed in normal appearance. 2. In 0.36 mm/day distraction group, the trifascicular pattern was normally shown, and there was no destruction in epineurium, perineurium, and endoneurium. The mild changes including myelin attenuation, axoplasmic swelling and darkening were observed. 3. In 0.72 mm/day distraction group, it was possible to differentiate the epineurium from the perineurium. Two normal fascicles and one unjuried fascicle were observed with a partially destructed perineurium. Most of the axons had axoplasmic swelling and darkening. 4. In 1 mm/day distraction group, it was difficult to differentiate the nerve structures such as fascicles, epineurium, perineurium, and endoneurium. The axons were severely destroyed, except few which showed decreases in size and changes in shape. Some collagen matrices were observed around the axons. These results suggest that the higher the distraction amount, the more severe the injury to the inferior alveolar nerve, fascicles, axons. Although distraction osteogenesis may be useful, the amount of distraction should be carefully selected.