수직적 안모형태와 치아성숙도의 상관관계에 대한 연구

구용한,현홍근,김정욱,장기택,이상훈,한세현,김종철 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.1

본 연구는 수직적 안모형태와 치아성숙도의 관계를 평가하고 이러한 연관성에 대한 사춘기 성장의 영향을 평가하기 위한 것이다. 이번 연구를 위해 7세에서 9세, 13세에서 15세 환자 1306명을 Ricketts의 VERT index를 이용하여 수직적 안모 형태를 분류하였고 환자들의 치령을 Demirjian법으로 평가하여 다음과 같은 결과를 얻었다. 1. 모든 군에서 치령이 역령과 비교 시 통계적으로 유의한 수준에서 크게 측정되었다. 2. 사춘기 연령군에서 brachyfacial type의 경우가 dolichofacial type 보다 치아성숙도가 크게 나타나는 경향을 보였다. 여성의 경우는 통계적으로 유의성있게 차이가 나타났으며, 남성의 경우는 통계적 유의성은 보이지 않았다. 3. Brachyfacial type의 경우 사춘기전 군들과 비교 시 사춘기 군들에서 치아성숙도가 유의성있게 높게 나타났으며, dolichofacial type의 경우는 연령층간 치아성숙도의 차이를 보이지 않았다. The purpose of this investigation was to study the relationship between vertical facial pattern and dental maturation in children in pubertal and pre-pubertal periods. The material consisted of lateral head films and panoramic radiographs of 1306 patients. The subjects were selected according to Ricketts's VERT index and other including criteria. These subjects were divided by VERT index to brachyfacial group and dolichofacial group. In each selected subject, dental age was determined according to Demirjian's dental maturity score. All subjects were distributed according to age, vertical facial type and sex, mean and standard deviation of chronological age, dental age and age difference were determined in each group. And the data were analysed to find the difference of tooth maturation by facial pattern. Findings of this study include: 1. In all groups, dental age was determined higher than chronological age in statistically significant level. 2. Compared by vertical facial pattern, in pubertal age groups, it seems that subjects with brachyfacial type presented the tendency to have an advanced dental maturation, only in female group. 3. Compared by pubertal period, brachyfacial groups presented more advanced dental maturation in pubertal groups than pre-pubertal groups.

유한요소법을 이용한 유도전동기 d-q 모델의 회로정수 해석

구태만,최종선 울산대학교 2000 공학연구논문집 Vol.31 No.1

본 논문에서는 3상 유도전동기의 d-q등가모델의 회로정수를 구하는 한 방법을 제시하였다. 자기해석은 철심과 슬롯 형상을 정확하게 반영할 수 있는 유한 요소법을 이용하였고, 철심의 자기포화현상도 고려하였다. 제시된 방법은 반복계산을 통하여 회로정수를 구하는 방법에 비해 계산시간을 절약할 수 있다. 그리고 산출된 각 회로정수는 전류의 변화에 따라 다른 값을 가짐을 확인할 수 있었다. This paper presents a method for determining of the equivalent d-q model parameters of three-phase squirrel cage induction motors. The method is based on the use of a finite-element field calculation which enables the precise slot geometry to be modelled accurately, and includes the effects of magnetic saturation of iron core. The proposed mothod can reduce computational costs compared with the method that needs the iterative field analysis to obtain the parameters. It is verified that the circuit parameters are shown as functions of the current.

서울대학교치과병원 소아치과를 내원한 교정환자의 분포양상에 대한 연구

구용한,현홍근,김정욱,장기택,이상훈,한세현,김종철 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.4

과거에 비해 소아 및 청소년기에 교정치료를 시작하는 경우가 증가하고 있으며 따라서 소아치과에서 교정치료가 차지하는 비율 역시 증가하는 추세이다. 이러한 변화에 맞추어 소아치과에 내원하는 교정환자의 분포 양상을 파악하기 위하여 본 연구를 시행하였다. 2006년 1월부터 2008년 12월까지 서울대학교 치과병원 소아치과를 내원한 환자 중 교정 진단 받은 792명을 대상으로 조사를 진행하였으며 다음과 같은 결과를 얻었다. 1. 교정 진단을 받은 환자의 연령 분포는 8세가 22%로 가장 많았고 7세(19%), 9세(16%) 순서로 나타났다. 2. 골격 분포는 골격성 1급 부정교합이 52%로 가장 많았고 3급(29%), 2급(19%)순서로 나타났으며 연령이 낮은 경우 3급 부정교합 환자의 비율이 높은 경향을 보였다. 3. 총 792명의 환자 중 28%인 218명에서 전치부 반대교합을 보였으며 연령이 낮은 경우 그 비율이 높은 경향을 보였다. Distribution of orthodontic patients in pediatric dental clinics has increased recently. So it is worth to study about the present status of orthodontic patients in pediatric dental clinics. The purpose of this study was to recognize the characteristics and orthodontic patterns of orthodontic patients in pediatric dental clinics. The material consisted of distribution and orthodontic analysis records of 792 new patients in the department of pediatric dentistry, Seoul National University Dental Hospital, from 2006 to 2008. Results were as follows 1. In age distribution, 8-year-olds group comprised 22%, 7-year-olds 19%, 9-year-olds 16%, 10-year olds 15%, 11-year-olds 11%, and other age groups comprised 18%. 2. In skeletal patterns, skeletal class Ⅰ patients comprised 52%, class Ⅱ 29%, and class Ⅲ 19%. 3. In vertical facial types mesofacial comprised 41%, brachyfacial 35%, and dolichofacial 24%. 4. Out of 792 patients 218 patients(28%) showed anterior cross-bite, and the occurrence ratio of anterior cross-bite increased as the age decreased.

腸重量을 利用한 泌尿器科的 手術

薛鍾求,羅容吉 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2

Urologic operations using bowel segments are urinary diversion, augmentation cystoplasty and ureteral replacement. Among these, urinay diversion and augmentation cystoplasty are most commonly used. But, among the complications, reflux, upper tract infection and metabolic disorders are troublesome for the urologists. So, in order to reduce these problems, intussuscepted bowel surgery is developed and modified. So, we reviewed 25 cases of bowel surgery using intussuscepted bowel segment in our urologic department. The results were as followings; 1. Operative procedures using intussuscepted bowel segments were 19 cases of urinary diversion (12 cases of Kock’s continent ileal reservior and 7 cases of ureteroileocecal sigmoidostomy) and 6 cases of augmentation cystoplasty(4 cases of Hemi-Kock’s ileocystoplasty and 2 cases of ureteroileocecal cystoplasty), and the most common disease was bladder cancer in urinary diversion and was tuberculosis in augmentation systoplasty. 2. The most common postoperative complication was would infection, and most of complications were developed in Kock’s continent ileal reservior, but there was no complication in augmentation cystoplasty. In Kock’s continent ileal reservior, stones and urine extravasations were the main complication, and in Hemi-Kock’s ilecystoplasty and ureteroileocecal cystoplasty, would infection was the main complication. 3. The postoperative BUN was increased significantly in the small bowel, but not in large bowel. And postoperative serum creatinine K^+ and Cl^- were slightly increased without significance. As a above result, intussuscepted bowel surgery in urology would be an effective method with relative low incidience of complications.

泌尿生殖器系 腫瘍에 對한 臨床的 考察

薛鍾求 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.2

A clinical analysis was made on 1085 patients with tumors of the genitourinary tract during 10 years from Jan. 1985 to Dec. 1994 in the department of Chungnam University Hospital, with the review of the literature. The results were as follows : 1. Of the 1085 tumor patients, male patients were 959 (88.7%), and female patients were 126 (11.6%). And annual incidence of the tumor was 16.9-29.0% (mean 23.6%). 2. The incidence of the malignat tumor was 98.0% in male and 90.5% in female. And most tumors were distributed in 6th to 8th decade and incidence of the tumor was increased after 5th decade. 3. Of the 1085 cases, prostate was most commonly involved, and then bladder, kidney, penis, urethra, ureter, testis, retroperitoneal space, adrenal and epididymis were involued in its freguency, but in male prostate, bladder, kidney, penis, ureter, testis, urethra, etc. were involued, and in femdle bladder, kidney, urethra, ureter, retroperitoneal space, adrenal were involved in its fregueucy. And the most commonly involved organ according to age were kidney in below the 3rd decade, bladder in 4th to 6th decade and prostate in above the 7th decade. 4. Of the 1085 cases, BPH was most frequent, and then, bladder transitional cell carcinoma, prostate adenocarcinoma, renal cell carcinoma, penile squmous cell carcinoma, Wilms' tumor, ureteral transitional cell carcinoma, urethral transitional cell carcinoma, seminoma, renal pelvis transitional cell carcinoma and etc. were developed. But in male BPH bladder transitional cell carcinoma, prostate adenocarcinoma, renal cell carcinoma, penile squmous cell carcinoma, Wilms' tumor and etc. were deveveloped in its fregueucy, and in femdle bladder transitional cell carcinoma, renal cell carcinoma, pelvis and ureteral transitional cell carcinoma, and etc. were deveveloped in its fregueucy, And the most common tumor according to age was Wilms' tumor in below the 2nd decade, bladder transitional cell carcinoma and renal cell carcinoma in 3rd decade, bladder transitional cell carcinoma in 4th to 6th decade, BPH in 7th to 9th decade, and prostatic adenocarcinoma in above the 90 years old.

요도하열의 임상적 고찰

설종구,나용길 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

A clinical observation was made on 60 patients with hypospadia who had been admitted to the Department of Urology Chungnam National University Hospital during 10 years and 10 monthes from January, 1979 to October, 1988. The results were as follows: 1. Incidence of the age group under 5 years old was 35.0%(21 cases). 2. The most common type of hypospadia was penoscrotal type(23 cases, 38.3%). 3. Associated anomalies were noted in 33.3% (20 cases)of hypospadia, and cryptorchism was the most common anomaly. 4. One-staged operative procedure was performed hypospadia and two-stag In one-staged operative procedure, Duckett's method, Hodgson's method and Hortone-Devine's method were used, and in two-staged operative procedure, Denis-Brown method was used. 5. The total incidence of operative complications was 40.0%(24 cases)and types of operative complication according to the operative procedures were 4 cases of urethrocutaneous fistula (14.3%)and 4 cases of urethral stricture(14.3%)in one-staged operative procedure(8 cases, 28.6%), and 15 cases of urtehrocutaneous fistular (46.9%) and 1 case of urethral stricture (3.1%) in two-staged operative procedure(16 cases, 50.0%). 6. Incidence of the operative complications according to the type of urinary diversion in one staged operative procedure was 29.3%(5 cases) in diversion group and 27.3%(3 cases) in urethral stent catheter group, and in two-staged operative procedure, incidence of operative complications was 50.0% (11 cases) in diversion group and 50.0%(5 cases) in urethral stent catheter group.

혈액투석을 하기 위한 Shunt 술에 관한 임상적 고찰

설종구 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

Shunt operation for hemodialysis is the mainstem in the treatment of acute and/or chronic renal failure. This study was aimed to investigate the results of the each type of shunt operations in 44 patients from January, 1982, to September, 1985, with the review of the literatures. The results were summerized as followings: 1. Of the 44 patients, male to female ratio was 1.3:1 and 50% of the patients were distributed from 4th decades to 6th decades. 2. The cases of the external and internal shunt were 35 cases in each(total; 70 cases). And 27 cases were recieved one time operation(61.4%), two time operations were 11 cases (25.0%), three times were 4 cases(9.1%), four times and five times were 1 case in each(2.3%). 3. The complication rates were 38.6%(27 cases) in total cases, 48.6%(17 cases) in external shunt and 28.6%(10 cases) in internal shunt. 4. The most common complication was obstruction(20.0%) in total cases of shunt operation and in external shunt(34.3%), and malfunction in internal shunt(22.9%). 5. The types of operations in internal shunt operation were Side-Side(20 cases; 57.0%) End-Side(9 cases; 26.0%), and End-End(6 Cases; 16.0%), and the most common complication in internal shunt was malfunction(6 cases).

腎細胞癌에 있어서, α-2b Interferon과 Vinblastine 倂用療法 : 第 1 報 Phase Ⅰ Study

薛鍾求,金瑩洙 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

Results of treatment of patients with advanced or metastatic renal cell carcinoma are most unsatisfactory. Hormonal treatment with progesterones and/or androgens has proved to be ineffective, and the tumor is considered to be almost completely resistant to signle-agent and combination chemotherapy with the possible exception of vinblastine, for which modest activity has been reported. In recent years, encouraging results were reported with combination of recombinant α-interferon with vinblastine, so we reviewed the effect of recombinant α-2b interferon and vinblastine combination therapy in renal cell carcinoma in the Department of Urology, Chungnam National University Hospital. The results are as follows; 1. Renal cell carcinoma was most prevalent in 6th decades male(male to female ratio was 1.5:1), and bilateral cases were 2(3.4%). 2. Treatment modalities were radical nephrectomy(24 cases), recombinant α-2b interferon and vinblastine combination therapy(21 cases), hormone therapy(4 cases), chemotherapy(4 cases), palliative selective renal arterial embolization(4 cases), and postoperative radiation therapy(2 cases). 3. The most frequent metastatic site of renal cell carcinoma was lung. 4. In the recombinant α-2b interferon and vinblastine combination therapy(21 cases), death cases were in 9 patients, whose distribution according to stage, grade and tumor cell type were 3 cases in lower stage(10 cases) and 6 cases in high stage(11 cases), 3 cases in lower grade(10 cases) and 6 cases in high grade(11 cases), and 4 cases in clear cell type(11 cases), 3 cases in granular cell type(6 cases) and 2 cases in sarcomatoid cell type(2 cases). 5. 5 years survival rate was slightly higher in the group of recombinant α-2b interferon and vinblastine treated patient group than in not treated patient group(50%) (p>0.1).

九州의「지역 생활조직」

이종구 서울대학교 국제지역원 1993 국제지역연구 Vol.2 No.3

九州(큐슈)의 도시에 있는 「지역생활조직」에 대한 조사를 통해 고도성장에 따른 급속한 사회이동 과정에서 해체되어 온 거주공간을 단위로하는 「공동성」의 복원이 사회적 과제로 등장하고 있는 모습이 관찰되었다. 소학교구를 단위로하여 조직된 지역발전을 위한 「협의회」가 수행하는 각종 주민조직의 통합 기능이 부각되고 있다. 이는 지연의 통합효과가 감소함에 따라 생활과정에서 새로운 공동서의 기반이 모색될 필요가 있기 때문이다. 「공동성」의 내용 가운데는 거주 지역 단위의 이익을 넘어서는 새로운 보편성이 포함되어 있는 모습에 주목할 필요가 있다.즉 「복지」와 「환경」이라는 키워드에는 지역사회를 포괄하고 있는 상위의 사회적 단위인자치체·국가의 생존과도 밀접한 관계를 가지고 있다. 이러한 사회적 가치의 추구는 자치체 수준의 의사결정과 밀접하게 결부되어 있다. 내부적으로는 국제화 외부적으로는 지역경제통합이 부각되는 가운데 지방의 주체성이 강조되는 방향으로 사회의 재조직화가 진행되는 현상에 주목할 필요가 있다. This field research has been organized forthe purpose of providing first-hand information about the urban neighborhood associations of kyushu region in Japan. The role of neighborhood association as an agent of social integration has been remained effective despite of the rapid social mobility and the apathy of the young generation towardlocal community. At primary school district level, community leaders emphasized the need oforganizing welfare system based in mutual help and and voluntary garbage dispose system. In fact, these functional requirements cannot be met without the cooperation of the neighborhood association. The community center established at the primary school district level has provided the recurrent education programme and the place for the activities of the various organizations including neighborhood association. The local authorities have supported the community center expecting the effect of social integration based on the sense of community. In these efforts, we can see the trend toward the reorganization of social relations and the redefinition of the autonomous local identity. But this emphasis upon the of the local identity can be interpreted as the other side of the globalization, which has been the social consensus in Japan since the 1980s.

尿路結石의 化學的 成分 分析

薛鍾求 충남대학교 의과대학 지역사회의학연구소 1979 충남의대잡지 Vol.6 No.2

A clinical study was made on 103 cases of urinary calculi among the number of 464 inpatients during 2 years and 8 months from January 1977 to August 1979, and chemical analysis was performed on 80 cases of urinary calculi which were collected. The results were as followings ; 1. The incidence of urinary calculi was 22.2% in inpatients, and male to female ratio was approximately 1.9 : 1, and 81.6% of the patients of urinary calculi were distributed in 20 to 49 years old. 2. The location of urinary calculi were ureter 53.4%, kidney 30.1%, bladder 13.6% and urethra 2.9%, and upper urinary tract calculi was 83.5% and lower urinary tract calculi was 16.5%. The most common size was 1.0-2.9cm(68.8%), and below 0.9cm and above 6.0cm in its diameter were 5% respectively. 3. The results of chemical analysis of 80 urinary calculi revealed oxalate salt in 72.5%, phosphate salt in 70.0%, and single composition was 22.5%. Among the upper urinary tract calculi, oxalate salt were 60.0% and phosphate salt were 51.3%, but in lower urinary tract, especially in bladder stores, ammonium salt were 83.3%. 4. The calculi which composed with ammonium salt were closely related with infection than other composed calculi.