연폭로 근로자들에서 적혈구 Pyrimidine 5'-Nucleotidase 활성도 및 요중 N-Acetyl-β-D-Glucosaminidase 활성도와의 상관관계 연구

서홍규,이병국,황천현,장성훈,이성수,이원진,최재욱 大韓産業醫學會 1997 대한직업환경의학회지 Vol.9 No.2

In this study, we measured the activity of the erythrocyte pyrimidin 5'-nuclectidase(P5N) and urinary N-acetyl-β-D-glucosaminidase(NAG) from 154 workers exposed to lead and 43 workers not exposed. We analyzed the correlation of the P5N activity and NAG activity with other biololgical exposure indices of lead such as blood lead(PbB) and zinc protoporphyrin(ZPP). The measurement was performed by using high performance liquid chromatography(HPLC), spectrophotometer and atomic absorption spectrophotometer. The results are as follows : 1. The mean value of P5N activity for workers exposed to lead was 9.50±3.13 μmol uridine/hr/g Hb and 11.60±2.2 μmol uridine/hr/g Hb for workers not exposed. The P5N activity showed a normal distribution, but the other indices of lead showed logarithmic normal distributions. 2. The P5N activity and ZPP were decreased as PbB was increased. But the NAG activity had no correlation with changes of PbB. 3. The correlation coefficients of the P5N activity with other biological exposure indices of lead such as PbB, ZPP, NAG activity were -0.72, -0.55, and 0.05, respectively. We speculated that the P5N activity can be used as a reliable biological exposure index of lead but NAG activity can be used as a biological management index of lead.

정상교합자의 치관경사도에 관한 연구

이신재,안석준,,김태우 대한치과교정학회 2005 대한치과교정학회지 Vol.35 No.5

치관경사도 연구는 부정교합 진단과 치료 계획 수립 및 더욱 편리한 교정 장치 개발과 관련한 기초 자료로써 중요시 되어 왔다. 이에 본 연구는 307명(남자 187명, 여자120명)의 대표본 성인 정상교합자를 연구대상으로 삼아, 자료의 신뢰성 검증이 병행된 치관경사도를 보고함으로써 치과교정학 임상에 도움이 되는 기초자료를 도출해 보고자 시행되엇다. 치관경사도 측정을 위하여 정상교합자 표본의 모형 상에서 개개, 치아의 근원심 각도 및 협설측 각도를 측정하였으며, 측정 전후 측정자간 및 측정자 내의 신뢰성 검증을 시행하였고, 남녀간의 성차와 기존 연구자료와의 차이를 검증하였다. 연구 결과 본 연구가 대표본을 대상으로 하여 높은 신뢰성 지표를 보였음에도 불구하고 정상교합자의 치관경사도는 변동이 심한 것이 관찰되었고 이에 따라 기존 연구들에 대비하여 임상적으로 유의한 자료상의 차별성은 고찰할 수 없었으며 변동의 양상 또한 선학들이 보고한 자료와 유사하였다. 결론적으로 치관경사도 측정시 드러난 정상변동을 해석하여 개별 적합성이 최대로 증진된 효율적인 치과교정장치를 개발하기 위해 좀 더 발전된 수학적 · 통계학적 모형 구성이 필요할 것으로 생각되었다. Angulation and inclination of clinical crown is important for diagnosing. Treatment planning and developing convenient orthodontic attachments. The aim of the study was to establish normative data with higher reliability on the angulation and inclination of clinical crown of Koreans with normal occlusion. This study employed the dental casts of 307 (male, 187: female. 120) adult normal occlusion samples. The angulation and inclination of clinical crown were measured by set-up model checker. In order to ensure reliability. intra- and inter-rater error were evaluated 3 times. The resultant data obtained had excellent reliability. however. when compared with the previous data as well as with gender difference clinically signiflcant interpretation was impossible because the whithin-dataset normal variation was high. which was common pattern of angulation and inclination measuring data of previous research. The result of this biometric study seemed to suggest more substantive design of the multivariate. high-dimensional interpretation methodology of these normal variation is required if more compatible orthodontic appliance could be developed.

복직근 및 박근 근피판술을 이용한 골반 및 서혜부 연부조직 결손의 재건

이재화,정윤규,김주봉,유대현,황성관,이훈범,김석원 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.6

Many operations for the reconstruction of the pelvic area have been studied until now. The local muscle flap is often used for the closure of these complex wound. But, these local muscle flaps may not be available for reconstruction due to the factors of infection, radiation, and surgical trauma. Since rectus abdominis muscle and gracilis muscle were introduced, their use has been steadily increased for the reconstruction of soft tissue defect of the pelvic area. Inferiorly based rectus abdominis muscle flap and the gracilis muscle flap have been adopted for well-vascularized soft tissue coverage of the defect of pelvis and groin area. These techniques were utilized in seven patients. Of these patients, rectus abdominis muscle flap was used on four patients and three patients were treated with gracilis muscle flap. Among these, chronic osteomyelitis of pelvic bone has been managed with inferiorly based rectus abdominis muscle flap in three patients. No complication has been found. The mean postoperative follow-up period was 26 months, with a range of 12 to 39 months. In conclusion, these muscles are functionally expandable , and provide adequate tissue volume with sufficient blood supply away from the zone of injury, and readily transposed into the pelvis and groin area through subcutaneous tunnel, and serve as an antibiotic delivery system that aids in the eradication of infection. These findings suggest a reconstructive option for the defect of pelvis and groin, and/or bone infection in this area.

한국인 키 및 몸무게 신 평가표에 관한 연구

이신재,김영재,안석준,,김태우 대한치과교정학회 2006 대한치과교정학회지 Vol.36 No.2

성장기 환자를 다루는 경우가 많고 치료기간이 긴 교정치료는 성장과 발육에 대한 지식이 필수적이다. 현재 활용되고 있는 일반 체성 성장 관찰 도표는 현 시대의 성장기 환자의 체성 성장 추이를 적절히 반영하지 못하고 있는 바 이는 이용된 자료가 오래되었기 때문이다. 이에 따라 본 연구는 2004년 산업자원부 기술표준원에서 시행하고 대한인간공학회에서 주관한 2004년 제5차 한국인 인체치수조사사업보고서 자료를 토대로 현시성있고 유용한 성장 곡선 및 성장 속도 곡선을 제작하는 과정을 소개할 목적으로 시행되었다. 자료를 처리하고 재배열하는 과정을 통하여 자료의 변이를 사분위수를 기본 골격으로 하고 1, 5, 95, 99 백분위수를 추가하여 남녀별 키ㆍ몸무게 성장 곡선을 제작하였고 이와 아울러 기하 평균에 기초한 성장 속도 곡선도 제작하였다. 본 연구 결과 생성된 한국인 키 및 몸무게 신 평가표는 성장 발육의 지표로 이용될 수 있으며, 성장 발육과 관련, 교정환자와의 의사 소통에 도움이 될 수 있을 것으로 생각되었다. For orthodontic treatment of growing patients and those which involve long treatment times, knowledge of growth and development are essential. Data from the general growth observation chart being used at present does not reflect the growth transition of modem times. This is because these data are out of date. The present study, therefore, aims to introduce the process of producing a growth curve and growth rate curve based on data which represents a more accurate description of the present situation. The data used were from the 5th nationwide survey, SIZE KOREA 2004 study, carried out by the Technology and Standards Policy Division, Department of Technology and Standards Planning, Ministry of Commerce. Processing and rearranging produced data with variations divided into the three quartiles and the 1st, 5th, 95th and 99th percentiles were included to produce a growth observation chart according to sex, height and weight differences. In the same way, a growth rate curve based on the geometric mean value was produced. The resulting growth charts can be used as an index for growth and development, and used for better communication between the orthodontist, patients and parents.

수면장애호흡환자의 두부방사선학적 특징

이금숙,김재형,김병국,정성수 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.2

Objective : The objectives was to compare the measurement on skull lateral projection, skull posteroanterior projection, and lateral cephalogram in normal control group and Sleep-disordered breathing(SDB) group. Material and methods : A prospective study of 20 adult group with SDB and 24 normal control group was done. The skull lateral projection, skull posteroanterior projection, and lateral cephalometric indexes were measured to assess skeletal structures, dental structures, and velopharyngeal anatomic features. Results : The compromised radiographic parameters that may be found in patients with SDB include dental convexity, SPAS, minimum PAS, PNS-P, and minimum transverse diameter of posterior airway space. Conclusion : SDB is associated with structural changes in a number of radiologic mesurements. The analysis of the skull lateral projection and skull posteroanterior projection may provide some informations regarding the prediction of the SDB.

수술-교정 치료 환자의 통제 소재

이신재,안석준,백승학,김태우,장영일,양원식,서정훈,남동석 대한치과교정학회 2002 대한치과교정학회지 Vol.32 No.4

교정치료와 악교정 수술을 필요로 하는 환자가 점증하는 현 시점에 비추어, 이에 대한 기술적인 측면의 발전과는 달리 수술-교정 치료 환자에 대한 정신사회학적 혹은 정신심리적 양상에 대한 객관적인 정보는 그리 많은 주목을 받는 편이 아니었다. 수술-교정치료는 과학적인 치료과정이긴 하지만, 어느 정도 심미적 혹은 예술적인 측면을 지니는 선택 치료의 면모를 지닌다. 그러므로 치료에 대한 환자의 주관적인 느낌은 치료 기술이나 치료의 의학적 성공 여부보다 더 큰 영향을 미칠 수 있다. 그러므로, 수술-교정 (혹은 교정) 치료에 대한 환자의 반응을 예측하기 위한 정신심리적인 정보는 치료에 유용한 지표가 될 수 있다고 가정할 수 있다. 통제 소재에 대한 연구는 인간의 다양한 행동을 예측하기 위한 유용한 지표로 알려져 왔는데, 본 연구에서는 42명의 수술-교정치료 환자와 성별/연령별로 표본 추출된 42명의 통상적 교정치료 환자를 대상으로 삼아 정신=심리적 비교 및 분석의 방법으로 두 가지 종류의 내외 통제 소재(internal/external locus of control) 검사를 시행하였다. 그 결과 수술-교정치료군에서만 남자가 여자에 비하여 낮은 외적 통제(높은 내적 통제)의 경향을 보였다. 결론적으로 수술-교정치료 환자의 정신심리적 기반은 성형 수술 환자와는 달리 교정치료 환자와 유사한 경향을 지닌 것으로 생각되었다. Surgical-orthodontic treatment is an increasingly more common dental procedure whose unique psycho-social or psychological feature has not been fairly quantified objectively. Since the treatment of a surgical-orthodontic (or orthodontic) patient is part science and part art, a subjective recognition of a patient about his or her own treatment may be more important than technical success during and after treatment. Therefore, the knowledge of the patient''s underlying psychological status could be useful in the prediction of patient's response to surgical-orthodontic (or orthodontic) treatment. The purpose of this study was to investigate and evaluate the psychological difference between conventional orthodontic patient and surgical-orthodontic patient by using locus of control (LOC) examination. Locus of control scale has been proven to be extremely useful in the prediction of a variety of human behaviors. Two types of locus of control data (I-score, Internal locus of control score ; E-score, External locus of control score) were obtained for 42 surgical-orthodontic patients and randomly selected 42 conventional orthodontic patients (as a control group) matched for age and gender. No statistically significant difference was observed in the scale of internal and external locus of control between the groups of surgical-orthodontic patients, males showed lower E-score (external locus of control score, higher internal locus of control tendency) than females. The results of this study suggested that the psychological background of surgical-orthodontic patients, in contrast with that of cosmetic surgery patients, has a similar disposition with that of orthodontic patients.

0.2% 불화나트륨 용액으로 5년간 양치한 초등학교 아동의 영구치 우식증 예방효과

손석환,이재화,김지영,김진범 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.2

Supervised weekly fluoride mouthrinsing(FMR) program with 0.2 percent neutral sodium fluroide solution has been implemented at primary schools in Pusan, Korea since 1995 to prevent the prevalent dental caries. Children of sixth grade in 2000 who had joined the weekly FMR program at four primary school in Pusan with a 0.2 percent sodium fluoride solution for five years from first grade in 1995 to fifth grade in 1999 were selected as experimental group. Children of sixth grade in 2000 who had not joined the FMR program until sixth grade and had not drunk fluoridated pulic water at two primary schools in the Bukgu(Norhtern) District of Ulsan were selected as control group. Samples were 295 in FMR group and 312 in control group. To estimate caries preventive effect, epidemiologic dental survey was performed at the schools of FMR and control group in 2000 for 11-year-old children. The surveyed data were analyzed with SPSS statistical package. The obtained results were as follws. 1. Children who experienced caries on permanent teeth were 71.2% in FMR group and 83.3% in control group. 12.1% of DMF rate decreased in FMR group compared to control group. 2. The DMFT scores were 2.68 in FMR group and 3.29 in control group. The difference of DMFT scores was 0.61 between fluoride mouthrinsing group. The caries reduction rate from 5-year FMR program was calculated as 18.5% by the difference of DMFT scores between FMR group and control group. 3. The DMFS scores were 4.04 in FMR group and 5.05 in control group. The difference of DMFS scores was 1.01 between FMR group and control group. The caries reduction rate from 5-year FMR program was calculated as 20.0% by the difference of DMFS scores between FMR group and control group. 4. Significant Caries Index of permanent teeth was 5.46 in FMR group and 6.02 in control group. 5. We suggest that fluoride mouthrinsing program should be developed to all primary schools to prevent dental caries.

섬광검출기를 이용한 공기 및 수중에서의 감마선 에너지 분광 분석

박재우,김은숙 濟州大學校工科大學産業技術硏究所 1996 尖端技術硏究所論文集 Vol.7 No.1

This is a study carried out for analyzing the energy spectrum of the γ-rays emitted from the sources in the air and water using NaI(Tl) scintillation detector. The main purpose of the study is to apply the theoretical response functions, that are constructed by simplifying the response functions proposed for high-purity germanium detector, to generating the γ-ray energy spectrum of the scintillation detector. Experiments have been carried out to determine the empirical parameters constituting the response functions as function of γ-ray energy. For the γ-ray sources, Cr-51, Cs-137, Mn-54, Zn-65, and Na-22 are used in this experiment. The empirical parameters of the response functions determined for the γ-ray sources both in the air and water are compared and analyzed. It is concluded that the functional form of the parameters of the response functions and the method used in this study to determine the empirical parameters can be effectively applied to predicting the energy spectrums of various γ-ray sources.

비틀림을 받는 正四角斷面 棒의 應力擴大係數에 關한 硏究

權在度,黃在錫 嶺南大學校工業技術硏究所 1979 연구보고 Vol.7 No.1

Many papers for stress intensity factor analysis of crack tip have been read recently. And then, the authors suggested the experimental analysis method of mode Ⅲ stress intensity factors by the displacement freezing method utilized membrane analogy and moire out-of-plane method. In this paper, stress intensity factor of square bar with the external boundary crack is measured by using (수식-입력불가)

任意의 Crack을 가진 正三角形棒의 K_Ⅲ/M_z에 關한 硏究

黃在錫 영남이공대학 1979 論文集 Vol.8 No.-

Up to now, there is no analysis on the Kr/M: in the cas where equilateral triangular bar with partial crack is under pure torsional moment. In this paper, an arbitrary circular bar which is equal to the torsional rigidity factor of equilateral triangular bar has the similar external partial crack as the equilateral triangular bar on the boundary condition. And then, the theoretical equation of the circular bar with crack is nearly in accord with experimental analysis of equilateral triangular with crack under pure torsional moment. Therefore. Stress analysis of equilateral triangular with crack under pure torsional moment can analyzed as equivalent circular bar under pure torsional moment which has the saint; torsional rigidity factor as torsional rigidity factor of equilateral triangular bar. the equation of 9a resulted from using membrane analogy in this paper is shown by equation(21).