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CT사진을 이용한 한국인의 C형 치근관의 분포에 대한 연구
전록원,허경회,이원진,허민석,이삼선,최순철 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2
Purpose : To investigate the incidence and prevalence of C-shaped root canal using computed tomographic images of head and neck in Korean population. Materials and Methods : Regardless of each examination purpose, randomly selected 268 examples which have serial axial computed tomographic images with 8 normal molars in maxilla and mandible were selected and investigated. Defined C-shaped root canal and we could get 82 proper image examples in view of this definition. These were detected and investigated of incidence and prevalence of C-shaped root canal. Results : C-shaped root canals were found in 82 examples among 268 (30.6%) and 147 teeth. They were only found on molar area, and the highest incidence was 37.41% of left mandibular second molars, and the lowest was 2.04%of right maxillary second molars. On prevalence of tooth position, mandibular second molar was the highest, 65% of C-shaped root canal teeth and maxillary second molar was 6% the lowest. Conclusion : 31% of randomly selected CT images no considering check-up reason have C-shaped root canals. The C-shaped root canals of mandibular second molar are found most frequently and they are also detectable on maxilla. On Korean population, C-shaped root canals are one of conditions that have to concern with dental treatment for it appears at a high prevalence relatively.
박영록,홍순기,허철,김헌주,한용표 대한신경외과학회 1992 Journal of Korean neurosurgical society Vol.21 No.6
The authors analyzed 32 cases with lower cervical spine injuries according to their etiologies, the findings of cervical spine X-ray and computed tomography, initial neurological grading scales and time of operation. The results are summarized as follow : 1) Lower cervical spine injuries occurred in 32 of the 49 cervical spine injuried patients. 2) The important factors affecting on outcome were the initial neurological state(p=0.038) and the degree of spinal canal narrowing on cervical computed tomogram(p=0.046). 3) The degree of prevertebral soft tissue swelling and displacement of vertebral body on initial cervical spine X-ray did not significantly affect on outcome(p=0.052). 4) The most suitable operative time for lower cervical spine injuries was 10∼20 days after injuries and the mortality was 9.3%.
심호식,장문준,하영록,정순미,이한식 大韓應急醫學會 1997 대한응급의학회지 Vol.8 No.1
Overcrowding of emergency departments is a growing problem. Delays in admitting patients to inpatient units have been reported as a contributing factor to overcrowding. Overcrowding in ED results in many patients not receiving needed care and impairs the ability of the ED provider to meet the needs of those patients that are treated. The effect of the critically ill patients on the overcrowded emergency department make emergency physicians frustrated. So we created the 'special unit for observation' of critically ill patients and managed them continuously and closely. The special unit for observation have 4 physical beds and monitors and 2 ventilators. One nurse and senior ED residents were asigned to the management of the patients in the special unit. 160 patients(3.4% of all ED visits) admitted to special unit during the period of March 1, 1996 to May 31, 1996. we could continue assessment and management of critically ill patients without psychologic strain or burnout generated by overcrowding. We think that special unit for critically ill patients is a very effective alternative to overcrowded ED.
Soon Hwa Kwon,Rok Yeun Hwang,Cheol Woo Choi,Jae Wook Hyun,Dong Soon Kim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
The citrus leaf miner (CLM) is an important citrus pest. A thorough understanding of the biology and population dynamics of CLM are essential for development of reliable pest population prediction system. We investigated the developmental periods of the species under ten constant temperature schemes (12.5℃~39℃). Furthermore, we established a development model of CLM, based on the result of a laboratory experiment. The immature developmental duration of CLM at constant temperatures were 63.5 days at 15℃, 23.9 days at 21℃, 15.6 days at 27℃, and 12.3 days at 33℃, showing statistically significant difference among temperature regimes. The lower threshold temperature and thermal constant were 11.3℃ and 243.7 DD, respectively, for immature development. In relation to temperature, non-linear development models were established for each developmental stage of CLM.
Soon Hwa Kwon,Rok Yeun Hwang,Cheol Woo Choi,Jae Wook Hyun,Dong Soon Kim 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
The citrus leaf miner (CLM) is a of important citrus pests in Jeju island, but it’s not clear about ecology of over-wintering in Jeju. We investigated the developmental stage to know how the CLM overwinters in 20 sites. And we investigated the mortality of larvae, pupae and adult stage of CLM in open citrus cultivated field December, 2017 to April 2018 and growth chamber conditions(from –10 to 5 ℃). As a result, no larvae and adult survived open field during winter. We concluded that the CLM usually overwinters as pupa during winter.