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한국인의 후경골 신경 자극에 의한 체성감각 유발전위 반응의 정상치
김승헌,임영진,김태성,김국기,이봉암,임언 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.2
This study was undertaken to obtain the normal somatosensory evoked potential pattern from stimulation of the posterior tibial nerve in order to provide basic data for clinical use in diagnosis and management of patients with brain and spinal cord lesions. Thirty-six patients, free of neurological disease and 14 volunteers were tested with 4-Channel Nicolet CA 1000 Clinical Averager. There were 26 male and 24 female, ranging in height from 156 to 178 centimeter, with a mean height of 165.2 centimeter. the results were as follows : 1) All lumbar waves(LP1. LN1) and early cortical waves(P1, N1, P2, N2) were easily identified in all of normal subjects, but P3 was obtained in 52% of them. 2) Mean latency of each wave was P1(38.10msec. 2.23), N1(47.04msec.±2.18), P2(N59.98msec.±2.97), N2(76.48msec.±4.97), LP1(17.99msec.±1.75) and LN1(20.72msec.± 1.53). 3) There was significant correlations between height of individuals and latency of the P1 and LP1. 4) Condction time between LN1 and P1 was 16.55msec.±1.03 and mean latency of left to right difference was 0.23msec.± 0.19.
시효처리와 마모체가 치과용 콤포짓트 레진의 마모에 주는 영향
김승헌,임범순,문현정,이용근,김철위 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4
Over the last decade, the use of posterior resin composites has grown considerably. Wear resistance of restorative materials is important for clinical longevity, esthetics, and resistance to dental plaque. The purpose of this study was to evaluate the effect of artificial saliva and 75% ethanol solution on the wear resistance of composite resins by measuring the amounts of wear, and compare the effect of antagonistic materials on the wear resistance of composite resins. Four universal composite resins (Z100, Aelitefil, Spectrum, and Unifill F) and two condensable composite resins (Surefil and Synergy Compact) were measured. Cylinder type specimens were light-cured for 40 sec on the wear surface, and 20 sec on each side surface. The surface for wear testing was polished by 600 grit SiC paper. Three different antagonistic materials (600 grit SiC paper, amalgam, and procelain) were used as an antagonist for 2-body wear test. After speciments were aged in 37℃, artificial saliva and 75% ethanol solution for specific periods (1 day, 1 month and 2 month), 2-body wear testing was performed by the FRP-2000 friction tester with applying 500 g load (80 kPa) to the specimen. The wear test was performed for 10 min and 30㎖ distilled water was used as lubricant. Amount of wear was measured by microscopic measuring device of Micro Hardness Tester in 0.1㎛ scale. There was significant difference in wear resistance of composite resins (p<0.05). Composite resins with filler content below 59 vol.% showed higher wear resistance that composite resins those with filler content above 62 vol.%. In composite resins from 1 day to 1 months (p<0.05). On the contray, the wear amounts of groups which filler fraction were above 62 vol.% did not show any significant differences with increasing aging period (p>0.05). In 1 day aged groups, the wear amounts of the groups aged in 75% ethanol solution were more than those of the groups aged for 1 month (p=0.045) and Spectrum group aged for 2 month (p=0.006). Amounts of wear were significantly decreased with changing antagonist from 600 grit SiC paper to amalgam or porcelain (p<0.05).
외상성 경동맥해면동누공 환자의 Trapping치료에서 뇌혈류 변화 : 증례 연구 예비보고 Case Study, Preliminary Report
김태성,김승헌,김광명,김국기,이봉암,임언 대한신경외과학회 1986 Journal of Korean neurosurgical society Vol.15 No.4
Carotid cavernous sinus fistula is abnormal communication between the carotid artery and the cavernous sinus. It can be classified according to three criteria: 1) pathologically into spontaneous or traumatic; 2) hemodynamically into high flow or low flow fistula; 3) angiographically into direct or dural fistula. We studied the regional cerebral blood flow changes in traumatic carotid cavernous sinus fistula. Regional cerebral blood flow checked 7 times during trapping procedure. The results are as follows; 1) regional cerebral blood flow decreased in normal side than in lesion side hemisphere in the state of carotid cavernous fistula. 2) After compression of lesion side common carotid artery over 10 minutes, cerebral blood flow increased in both side. 3) Cerebral blood flow decreased temporaly after operation on both side but normalized 2 or 3 weeks later.
이기홍,김승헌,임영진,김태성,김국기,이봉암,임언 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.4
We have experienced 80 cases of primary pontine hemorrhage who were admitted to Kyung Hee Medical Center from October 1982 to September 1987. All cases were confirmed by brain CT scan and treated conservatively. The hematomas have classified according to their modes of extension on computerized tomography. The outcome was assessed on their basis of activity of daily living. The results were as follows : 1) Pontine hemorrhage represented 7.8% of all primary intracerebral hemorrhages. 2) Age distribution was ranged from 3rd decade to 7th decade, and 65% of them were in 4th and 5th decade. The ratio of male to female was 5 : 3. 3) 91.2% of patients had history of systemic hypertension and most of them did not received antihypertensive medication. 85% of patients showed the systolic blood pressure on admission above 160㎜Hg. 4) Outcome Ⅰ and Ⅱ according to ADL were only 7.5%. The prognosis was affected by level of consciousness, blood pressure on admission, and size and extent of hemorrhage. 5) Majority of causes of death were injury to brain itself, and the mortality rate was 33.7%.