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중증 외상성 뇌부종 환자에서 양측 전두-측두부 감압적 개두술의 의의
신형식,김진용,김태홍,황용순,김상진,박상근,Shin, Hyung Shik,Kim, Jin Yong,Kim, Tae Hong,Hwang, Yong Soon,Kim, Sang Jin,Park, Sang Keun 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.9
Objective : The treatment of malignant posttraumatic brain swelling remains a frustrating endeavor for neurosurgeon. Mortality and morbidity rates remain high depite advances in medical treatment of increased intracranial pressure. If conventional therapy fails in patients suffering from intracranial hypertension, there is only small number of second-tier option left including decompressive craniectomy. The role of decompressive craniectomy in posttraumatic brain swelling remains controversial. We assessed the efficacy and indications of decompressive craniectomy. Methods : The authors performed decompressive bifrontotemporal craniectomy in 22 patients with malignant posttraumatic brain swelling. Epidural pressure monotoring was performed in all patients. The clnical data and surgical outcomes were reviewed retrospectively. Result : The favorable outcome(GOS score 4-5) was 59%(13 of 22 patients), whereas the mortality rate was 32% (7 of 22 patients). Two patients(9%) remained in severely disabled state. Increased rate of favorable outcome was seen in the patients who had 8 or more of GCS score at admission and exhibited B wave in ICP monitoring and who showed steady state or slow deterioration in clinical course. Conclusion : If conservative therapy fails, decompressive bifrontotemporal craniectomy should be considered in the management of malignant posttraumatic brain swelling before irreversible ischemic brain damage occur.
Nifedipine이 건강 치은 조직의 치은 섬유모세포에 미치는 영향
신형식,한희란,김명은,Shin, Hyung-Shik,Han, Hee-Ran,Kim, Myung-Eun 대한치주과학회 1996 Journal of Periodontal & Implant Science Vol.26 No.3
Gingival overgrowth is a well known side effect of several drugs, including nifedipine, phenytoin, cyclosporin, dilitiazem, verapamil. A number of studies have been performed to investigate the mechanism by which nifedipine(a calcium channel blocking agent) affects the gingival tissue. The aim of the present work was to investigate the effect of nifedipine on healthy gingival fibroblasts with special emphasis on determining the changes in cellular proliferation and protein and collagen synthesis. Gingival fibroblasts were obtained from the explants of healthy gingiva of extracted 3rd molars or premolar teeth extracted from the patients for orthodontic treatment. To evaluate the effect of nifedipine on cell proliferation, the cells were seeded at a cell density of $1{\times}10^4$cells/well in 24-well culture plates and treated with 100 and 200ng/ml of nifedipine for 10days. After trypsinization, the cells were counted with a haemocytometer on 1st, 3rd, 5th, 7th and 10th days. Then, MTT assay was carried out. For total protein and percent collagen synthesis, $3{\mu}Ci/ml$ $^3H-proline$ was added to each well for the final 4 hours of the incubation period. The results indicate that nifedipine does not influence cell proliferation in healthy gingival fibroblast in vitro and has a specific effect in reducing total protein and percent collagen synthesis. On the above the findings, exogenous nifedipine does not influence on healthy human gingival fibroblast proliferation and protein and collagen synthesis.
미노클린 첨부제의 만성 변연성 치주염의 치료효과에 대한 유효성과 안전성의 평가
신형식,한경윤,정종평,Shin, Hyung-Shik,Han, Kyung-Yoon,Chung, Jong-Pyung 대한치주과학회 1994 Journal of Periodontal & Implant Science Vol.24 No.3
The benefits in using controlled delivery approaches include improved pharmacokinetic response, greater ability to localize the drung adjacent to the disease, and more control of local concentration at a lower total dosage. The purpose of this study was to evaluate the efficacy and safety of Minocline strip on chronic marginal periodontitis. Minocline Strip was applied in the periodontal pocket of 94 patients with a clinically diagnosed as a chronic marginal periodontitis, 4 sites for each patients with a 5mm probing pocket depth were selected in split mouth design and were divided into two group, ie., placebo group ($C_1$, $C_2$) and experimental group ($E_1$, $E_2$). Supragingival scaling and oral hygiene instruction were performed 1 week before experiment. Minocline Strip was applied on day 0 and 7, weekly, Clinical and microbiological tests were performed on day 0, 7, 14, 28 and 42. The results were as follows ; 1. Minocline Strip showed significant improvement on Chronic Marginal Periodontitis in 77 patients (82.0%) and improvement rate was more than 66.7% of all investigational items. 2. Only 6 patients complained mild pruritis during the early therapy but not needed discontinuence of the therapy. 3. The availability of Minocline Strip was 72 patients (76.6%) synthetically evaluating efficacy and safety. In conclusion, Minocline Strip appears to be effective and safe for the treatment of Chronic Marginal Periodontitis.
Hyung-Shik Shin,Mushtaq Ahmad Dar,김영순,서형기,Gil-Sung Kim,Rizwan Wahab,Zubaida A. Ansari,서재명,신형식 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.3
A comparative study for the nucleation of diamond was carried out using surface treatment like (i) surface scratching with 1 μm diamond paste and (ii) surface etching using chlorine plasma at different RF powers (50, 100 and 150 W). Atomic force microscopic study shows variation in roughness from 31 nm to 110 nm. Scratching results in random scratches, whereas plasma etches a surface uniformly. Scanning electron microscopic observations show well faceted crystallites with a predominance of angular shaped grains corresponding to <100> and <110> crystallite surfaces for the scratched as well as plasma etched substrate. Surface etching at 150W plasma power results in a better growth in comparison with 50 and 100 W plasma powers. Chlorine-radical is found responsible for the changes in the growth morphology. Raman spectroscopy shows a sharp peak at 1,332 cm−1 and a peak at ~1,580 cm−1 for both samples
화학증착법에 의한 Y - Ba - Cu - O 계 고온 초전도 박막 제조에 있어서 기판의 표면상태에 따른 박막의 특성변화 연구
신형식 조익준,박정식,양석우,이희균,원동연 ( Hyung Shik Shin,Ik Joon Cho,Joung Shik Park,Seog Woo Yang,Hee Gyeun Lee,Dong Yeon Won ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.2
Since the discovery of superconducting oxides, enormous amount of research has been conducted on the preparation of high-T_c superconducting films. It is obvious that future microelectronic devices will require well-crystallized films of smooth surface and uniform structure prepared at substrate temperatures as low as possible. The high-T_c superconducting Y-Ba-Cu-O thin films in this work were prepared by thermal chemical vapor deposition method on MgO(100) substrate without postannealing using β-diketone metal chelates of Y(thd)₃, Ba(thd)₂, and Cu(thd)₂ as source materials and O₂ as a reactant gas. Superconductivity above liquid nitrogen temperature(T_(C, onset)=90.1 K and T_(C, 0)=87.3 K) was obtained for the film prepared at 650℃ and 0.0126 torr. The thin films consisted of Y-Ba-Cu-O with mostly c-axis perpendicular to the substrate plane and with small amounts of a-axis normal to film surface.
하악 제1대구치 치근본체의 길이가 조직유도재생술의 임상결과에 미치는 영향
피성희,신형식,Pi, Sung-Hee,Shin, Hyung-Shik 대한치주과학회 2006 Journal of Periodontal & Implant Science Vol.36 No.2
The form of furcation influence both the pathogenesis of periodontal destruction and therapeutic results. The present study was performed to evaluate the effect of root trunk length on clinical outcomes of guided tissue regeneration. Total 30 mandibular first molars were evaluated in this study. Probing pocket depth, clinical attachment level, vertical defect depth and horizontal defect depth were measured at baseline and 6 month after GTR. Correlation coefficients between root trunk length and other clinical measurement were analyzed. The results of this study were as follows 1. The mean root trunk length in lower 1st molar was 2.15 mm. 2. Probing pocket depth, clinical attachment level, vertical defect depth and horizontal defect depth were significantly reduced at 6 month postoperatively compared to values of baseline 3. Correlation coefficient between root trunk length and vertical defect depth at baseline was 0.406 showing the positive correlation 4. Correlation coefficient between root trunk length and horizontal defect depth at baseline was -0.463 showing the negative correlation. 5. Correlation coefficient between root trunk length and decrease of horizontal defect depth after GTR was 0.654 showing the positive correlation. In conclusion, the root trunk length maybe effector for clinical outcome after guided tissue regeneration.