치아 맹출전 시행한 기관 삽관이 유치열기에 미치는 영향에 대한 증례보고

신윤경,Hyun, Hong-Keun,김영재,김정욱,장기택,이상훈,김종철,한세현 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.3

유치 맹출전에 치조융기에 가해진 외상은 유치의 맹출 지연 및 형태이상,치배의 변위 등을 일으킬 수 있으며 심한 경우 구개의 흠 형성,절치의 결함 및 후천성 구개열 등을 야기할 수 있다. 본 증례는 치아가 맹출하기 전에 수차례의 기관 삽관을 시행한 병력이 있는 심한 저체중아에서 맹출지연,형태이상,법랑질 저형성,영구치 치배 등의 변위가 관찰되어 이를 보고하는 바이다. Delayed eruption and abnormal morphology of the primary incisors following intubation may be due to follicular displacement and localized trauma caused by the process of intubation. Result of such damage included palatal groove formation, defective incisors and acquired clefts. This clinical report presents effect of intubation on the primary dentition of premature low-birth-weight children prior to tooth eruption.

Single Median Maxillary Central Incisor(SMMCI) 환아의 증례보고

신윤경,김영재,김정욱,장기택,이상훈,한세현,김종철 大韓小兒齒科學會 2007 大韓小兒齒科學會誌 Vol.34 No.4

Anatomic abnormalities of teeth development include the presence of a single maxillary central incisor at midline instead of two central incisors. The incidence of cases with a single maxillary central incisor is approximately 1 in every 50,000 live births. single median maxillary central incisor(SMMCI) may be a integral manifestation of anyone of a number of syndromes. It has been reported an association with several midline disorders which have varied in severity. A SMMCI has also been reported as an isolated finding. But in some cases, it has been considered as an incomplete expression of autosomal dominant holoprosencephaly. So any patient who appears for treatment with a SMMCI should be referred for a detailed medical examination to exclude other associated systemic abnormalities and for mutation analysis to facilitate correct diagnosis and the provision of appropriate genetic counseling. Early orthodontic treatment is needed to minimalize emotional trauma of child. This case report was about three patients with a SMMCI as isolated finding. The purpose of these case reports was to present cases of single maxillary central incisor not associated with other disorders. Single Median Maxillary Central Incisor(SMMCI)는 상악 중절치 형성부전으로 하나의 상악 중절치가 정중앙에 위치하는 치아 발달의 해부학적 이상을 의미한다. 50,000명 중에 1명 꼴로 발생할 정도로 아주 드물며 각종 증후군 및 정중선 이형성을 보이는 발달장애와 연관되어 나타나는 것으로 보고되고 있다. SMMCI는 다른 이상과 연계되지 않고 독립적으로 나타날 수도 있으나 상염색체 우성유전인 전전뇌증(holoprosencephaly)의 경미한 발현일 가능성이 있으므로 유전자 상담이 필요하다. 또 특징적인 안모 및 구강 상태를 보이므로 환아의 바람직한 신체적,정서적 발달을 위해 조기에 교정적 접근이 필요하다. 본 증례는 다른 이상 소견을 보이지 않는 세 명의 SMMCI 환아의 증례를 보고하는 바 이다.

Williams 증후군의 치의학적 소견에 대한 증례보고

김종철,한세현,김진태,이선경 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.2

Williams syndrome is one of congenital disorder characterized by cardiac defect, peculiar facial features. This syndrome shows characteristic facial appearance which includes full lips, rounded cheeks, broad forehead, flattened bridge of nose, small nose with anteverted nostril, long filtrume and epicanthal folds. In oral features, quite a few dental caries, partial anodontia, microdontia, malocclusions have been found. We are reporting on two girls with Williams syndrome in this paper. The oral findings are as follows. 1. Oligodontia, anomalies in the size of teeth, anomalies in tooth morphology can be found. 2. Due to high rate of dental caries and cardiac defect, diet control and routine oral check up are needed. 3. Frequency of malocclusion is higher than normal children. 4. Characterized facial features are shown such as full lips, rounded cheeks, broad forehead, flattened bridge of nose, small nose with anteverted nostril, long filtrum and epicanthal folds.

한국인 혼합치열기 아동의 두부방사선계측학적 연구

손동수,김진태,이상훈,한세현,김종철,선예경 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2

The purpose of this study was to obtain roentgenocephalmetric norms of the Korean mixed dentition children which are used in the occlusal guidance treatment. The 121 subjects(57 males and 64 females) were consisted of mixed dentition children who showed up in Department of Pediatric Dentistry Seoul National University Hospital from June 1990 till February 1993 and contestants of the Heathy Dentition Contest in 1992 and 1993. The subjects had normal profiles and occlusions without severe carious lesions or missing teeth. Following results were obtained from Sassouni, Ricketts and McNamara analysis; 1. Norms and standard deviations of the children were obtained. 2. ANS, upper incisor, pogonion, upper 1st molar and gonion were located posterior to their reference arcs and B was located anterior to its reference arc. 3. Lower anterior facial height was longer than upper anterior facial height and upper posterior facial height was longer than lower posterior facial height. Mandibular corpus length was longer than anterior cranial base length. 4. Anterior cranial length was longer in male(p<0.05) and mandibular corpus length was longer in male than in those of female(p<0.01). Porion was located more posterior in male than in those of female(p<0.05) 5. Effective mandibular length and lower anterior facial height were longer in male than in those of female(p<0.005). Effective midfacial length was longer in male than in those of female(p<0.05).

Case Study for Sustainable Management of Jeju Experimental Forest

( Se Kyung Chong ),( Hyung Ho Kim ),( Hyun Kyu Won ) 한국임학회 2006 Forest Science And Technology Vol.2 No.2

Analysis of Forest Land Aggregation Methods for Timber Supply Modelling

Se Kyung Chong 한국산림과학회 1992 한국산림과학회지 Vol.81 No.1

The difference in compartment based and stand based land classification tin the predicted allowable cuts resulting from various timber supply models has recently been recognized as a potential problem. The only work on this problem is by Jamnick(Jamnick 1988 and Jamnick et al. 1990). Using a forest of about 1000 hectares, this research found that larger present values were predicted using stand based classification, but that the differences diminished as the number of management choices increased. A number of questions still remain on the applicability of these results to large forest management agreement(FMA) holders in Alberta : (1) are the results from the previous study appropriate for a large scale (10^6 hectares) industrial forest such as an FMA ? , (2) what is the predicted loss in allowable cut of using compartment based management units instead of stand based management units?, (3) how important are forest road access constraints on the optimal timber harvest schedule?, (4) what are the differences between compartment based and stand based management units in regards to data aggregation and computer operation?, and (5) do upper limit constraints on costs per period affect the relationships above?. In order to address some of these questions, an FMA in Alberta of about 106 hectares was used to examine the difference in the volume of the predicted allowable cut between various scenarios of compartment based and stand based land classification and various scenarios of constraints over time on access, cost, and volume 11ow. Results of this study support those of Jamnick et al. (1990) in that larger allow able cuts(1.31 to 2.10%) are predicted using models with stand based units. Additionally, increases in predicted allowable cut of 1.33-2.13% were found if the five independent allowable cut units on the forest were condensed to one allowanle cut unit. Removal of the current access constraints led to an increase of predicted cut of 15-16%. Maximun cost constraints per period were found to. (a) on average, increase predicted differences from unconstrained stand based versus compartment based analysis, (b) decrease differences found by reducing the number of allowable cut units, and (c) show no meaningful measurable results with access constraint analysis. Differences in computer time(cost) for determining solutions and differences in data preparation effort were examined. Stand based analysis for this study led to larger problems, which took more computer time to solve. When logging and hauling cost are included in the analysis, data for these stand based methods are more difficult to develop as well. However, in spite of the increased costs and effort, it is estimated that the actual increase in cost is from one third to one half of a cent per cubic meter gain in allowable cut. Use of the cost constraints led to the ability to develop marginal cost of allowable cut cures to compare stand based and compartment based analyses. Individual managers can use these curves as a policy decision making tool to determine which type of land classification analysis is best(most economical per cubic meter cut) as a function of allowable cut level. These curves can also help the individual manager to set a price policy for the external purchase of wood supplies.

지속가능한 산림경영을 위한 몬트리올 프로세스 기준과 지표의 가용성과 적용성에 대한 분석

정세경(Se Kyung Chong),김외정(Wae Jung Kim),이봉수(Bong Soo Lee) 한국산림과학회 2001 한국산림과학회지 Vol.90 No.5

Since the development of a new paradigm of sustainable forest management, concerns have been focused on how the sustainability of forests will be assessed and measured objectively. This study examined the conceptual displacement on what is sustainability of forests, and analyzed the progress made by international and regional initiatives on criteria and indicators for sustainable forest management in terms of comparability and compatibility. Regarding data availability and applicability of criteria and indicators for sustainable forest management, the data reports gathered from Montreal Process member countries were analyzed. Within this context, Korean case were examined, using all possible existing information sources such as Forest Statistics, on 6 items of concepts of criteria and indicators, degree of difficulties, measurement units, data availabilities, problems and needs of future improvements for data gathering. The study also analyzed the applicability of criteria and indicators for sustainable forest management.

국부통계 산출을 위한 입목자산 분류기준의 정립

정세경 ( Se Kyung Chong ),김영환 ( Young Hwan Kim ) 한국산림과학회 2007 한국산림과학회지 Vol.96 No.6

Neuroimaging in Randomized, Multi-Center Clinical Trials of Endovascular Treatment for Acute Ischemic Stroke: A Systematic Review

Chong Hyun Suh,Seung Chai Jung,Byungjun Kim,Se Jin Cho,Dong-Cheol Woo,Woo Yong Oh,Jong Gu Lee,Kyung Won Kim 대한영상의학회 2020 Korean Journal of Radiology Vol.21 No.1

Appropriate use and analysis of neuroimaging techniques is an inevitable aspect of clinical trials for patients with acute ischemic stroke. Neuroimaging examinations were recently used to define the core eligibility criteria and outcomes in acute ischemic stroke research. Recent clinical trials for endovascular treatment in acute ischemic stroke have also demonstrated the efficacy or safety of endovascular treatment using various imaging modalities as well as clinical indices. Furthermore, independent imaging reviews and imaging core laboratory assessments are essential to manage and analyze imaging data in order to enhance the reliability of the outcomes. Therefore, we systematically reviewed the use of neuroimaging in recent randomized clinical trials for endovascular treatment of acute ischemic stroke in order to provide a thorough summary, which would serve as a resource guiding the use of appropriate imaging protocols and analyses in future clinical trials for acute ischemic stroke. This review will help researchers select appropriate imaging biomarkers among the various imaging protocols available and apply the selected type of imaging examination for each study in accordance with the academic purpose.

소화성궤양 환자의 위액내 당단백 및 Pepsin 활성도의 변화

장세경,김종숙 중앙대부설한국의과학연구소 1988 한국의과학 Vol.20 No.4