고교 야구 선수들의 견관절 외회전 및 내회전근의 근력 및 그 특성

이제운,윤승호 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

The imbalance of rotator muscles of shoulder frequently causes shoulder injury in many baseball players. This study was intended to evaluate the strength characteristics of external and internal rotator muscles in high school baseball players. Isokinetic tests of external/internal rotators were performed using Cybex Ⅱ^+ Isokinetic dynamometer in nine pitchers, thirteen nonpitchers and twenty normal control subjects. And the flexibility of external rotator muscles of shoulder was evaluated by the hand-to-shoulder-blade Test. The results were as follows : 1) In pitchers, mean peak torque ratios of external/internal rotators were significantly high in nondominant side at 180 and 300 deg/sec, mean peak torque and mean peak torque body weight ratios of external rotators were significantly high in nondominant side at 180 deg/sec, 180 and 300 deg/sec respectively, mean peak torque of internal rotators were significantly high in dominant side at 300 deg/sec. 2) In nonpitchers, peak torque ratios of external/internal rotators were significantly high in nondo minant side at 180 deg/sec, but peak torque and peak torque body weight ratios of internal rotators were both significantly high in dominant side at 180 and 300 deg/sec. 3) In comparison between pitchers and nonpitchers, peak torque ratios of external/internal rotators in dominant side were significantly high in nonpitchers at 180 and 300 deg/sec, but there were no significant differences in nondominant side. 4) In flexibility tests of external rotators, pitchers showed statistically significant tightness in external rotators than nonpitchers and control group in dominant side, but there were no statistically significant differences in nondominant side. In conclusion, pitchers showed weakness and tightness in shoulder external rotators, which may lead to major shoulder injury. Therefore evaluation of muscle power and flexibility was thought to be one of the very useful screening tests for the prevention of shoulder injury.

다구치법에 의한 고 규소 내산주철의 용해주조공정 최적화

신제식,이상목,문병문,김정철,한동운,백승한 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.2

In this study, Taguchi method, one of the design tools of experiments, was applied to optimize casting process parameters of the high silicon corrosion-resistant iron. Three casting process parameters such as melting temperature, rare earth metal (mischmetal) addition, and pouring temperature were chosen. Using SN (signal-to-noise) ratio calculated from ultimate tensile strength of each experimental casting run, the relationship between the casting parameters and mechanical properties was statistically evaluated. The casting condition of a melting temperature of 1,650℃, 0.2% rare earth metal addition, and a pouring temperature of 1,350℃ led to an excellent ultimate tensile strength above 11 kgf/mm², which is beyond the industrial criterion. The effects of the casting parameters on mechanical properties and corrosion resistance were further confirmed by combined analysis of fractography, hydrogen content determination, microscopic test, and acid resistance test. (Received August 23, 2004)

파노라마 X선 사진을 이용한 무치악 환자의 방사선학적 연구

문제운,최순철 大韓口腔顎顔面 放射線學會 1992 Imaging Science in Dentistry Vol.22 No.2

The author has examined the abnormalities in panoramic radiographs of 668 edentulous patients. The distribution, type, incidence, and location of all abnomalities were analized, and the distances between alveoar crest and anatomical structures were measures. (Maxillary measurements were performed between alveloar crest and lower margin of the maxillary sinus and mandibular measurements between alveolar crest and upper edge of the mental foramen). The obtained results were as follows ; 1. Of the 668 panoramic radiographs examined, 103(15.4%) showed one or more abnormalities. 2. The incidence of abnormalities was decreased by years, which was 22.0% in 1970's and 16.8% in 1980's and 12.1% in 1990's. 3. The distribution of abnormalities as follows ; 43(40.2%) superficial root fragments, 24(22.4%) impacted teeth, 9(8.4%) imbedded root fragments, 7(6.5%) cysts, 7(6.5%) fractures, 5(4.7%) foreign bodies, 5(4.7%) abnormal radiolucencies, 4(3.7%) abnormal radiopacities, 2(1.9%) bony defects, 1(0.9) tumor. 4. In the location of abnormalities, 42 cases(35.3%) were in the maxillary posterior region, 26 cases(21.8%) were in the maxillary anterior region, 20 cases(24.4%) were in the mandibular posterior region and 18 cases(15.1%) were in the mandibular anterior region. 5. In the distance between alveolar crest and maxillary sinus, 109 cases(9.7%) were below 0.5mm, 757 cases(67.6%) were between 0.5mm and 10mm, 254 cases(22.7%) were above 100mm. In the distance between alveolar crest and mental foramen, 73 cases(8.8%) were below 0.5mm, 501 cases(60.7%) were between 0.5mm and 10mm and 252 cases(30.5) were above 100mm.

방사선조사 후 유표피암종세포내 칼슘농도의 변화와 apoptosis 발현에 관한 연구

이삼선,문제운,허민석,박태원,유동수,최순철 大韓口腔顎顔面 放射線學會 1999 Imaging Science in Dentistry Vol.29 No.1

Purpose: Ionizing radiations have been reported as an apoptosis initiating stimulus in various cells and it has established that sustained elevations in [Ca²+] can lead to DNA fragmentation by Ca²+-dependent endonucleases, ultimately resulting in apoptotic cell death. The previous experiments have been reported by using primarily thymocytes and lymphocytes and the change of [Ca²+] was measured only by minutes or hours respectively. We need to evaluate [Ca²+] in both several minutes and hours after irradiation of radiation of radiation therapy and verify the apoptotic cells. Materials and Methods: We have measured [Ca²+] in human gingival epitheloid cancer cell with 10 Gy irradiation, at minutely intervals and hourly intervals using digitized video-intensified fluorescence microscopy and the fluorescent Ca²+ indicator dye, fura-2. In order to find out that the transient rise in [Ca²+] could induced apoptosis, cells were incubated for 1 hour at 37℃ with TdT enzyme, rinsed and resuspended containing fluorescence and observed under a confocal fluorescence microscope. MTT assay was done to determine cell activity and LDH assay was done to determine the amount of necrotic cells. Results: After irradiation, the transient and temporal increasing of [Ca²+] in the KB cells was founded. Though, there was no change in the intracellular [Ca²+] at 30 minutes and 2 hours after irradiation. We could detect of DNA fragmented cells at 4 hours after 10 Gy irradiated cells. There were no significant differences between 4 hour, 1 day, 3 day cells. There were no significant differences in MTT and LDH assay between the irradiated group and the control group after 4 hours and 1 day. Though after 3 days there were differences in MTT and LDH assay between the irradiated group was significantly decreased than the control group, in LDH assay the number of necrotic cell death of the irradiated was higher than the control group. Conclusion: In KB cells there were incipient and temporal increasing of the [Ca²+] with 10 Gy irradiation and the apoptosis was founded from 4 hours later which was earlier than seeing of the change of the amount of the cellular ability and necrosis.(J Korean Oral Maxillofac Radiol 1999:29:109-117)

등록된 장애인의 장애등급 재평가

김봉옥,이제운,윤승호 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.1

The purposes of this study were to obtain information about the registered physically disabled and to find out problems in current disability grading for the registration of the disabled. Fortynine registered disabled people who lived in Wolpyeong Dong, Taejon as of June 1, 1994 were evaluated to grade their disability according to the disability grading table currently in use by one physiatrist, one senior resident in rehabilitation medicine and one general physician at the same time allowing no mutual communication among the raters. These re-evaluated disability grades were compared to the initial disability grades recorded in their disability registry. The results were as follows ; 1) The most common disability group was cerebrovascular accident group(10 cases, 20%), and most frequently participated physician in initial evaluation was orthopedic surgeon(16 cases, 33%). 2) The period from initial evaluation to re-evaluation was from 2 months to 6 years(mean 2.9 years). 3) There were statistically significant differences (P<0.05) between initial disability grades and re-evaluated disability grades. 4) There was no statistically significant differences(P>0.05) among re-evaluated disability grades by three examiners. 5) For the group from cerebrovascular accident and traumatic brain injury, there was no statistically significant differences(P>0.05) between physiatrist and resident, but there was statistically significant differences(P<0.05) between physiatrist and general physician, resident and general physician, respectively. From the above results, the disability grade table seemed to be so general that can be used by the physicians regardless of training in rehabilitation medicine. The disability grade table should be modified and supplemented specifically in statements of symptoms of the acquired brain dysfunction such as cerebrovascular accident and traumatic brain injury, and should include the criteria for the duration since the onset of disability to the evaluation for registration and necessity of re-evaluation over time.

결합조직형성 법랑모세포종의 방사선학적 소견 : 증례보고 3례

최다혜,허경회,문제운,이원진,허민석,이삼선,최순철,박관수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Desmoplastic ameloblastoma is a rare histologic variant of ameloblastoma. It shows important differences in anatomic distribution, histologic appearance, and radiographic findings compared with the general type of ameloblastoma. It is histologically characterized by an abundance of densely collagenous stroma and radiographically a mixed radiolucent-radiopaque lesion. We present three cases of desmoplastic ameloblastoma. All the patients complained on buccal swelling with or without pain and the sites of occurrence were the anterior and the premolar region. Plain radiographs showed mixed radiopaque-radiolucent lesion with ill-defined or diffuse sclerotic margin and no external root resorption. Additionally, CT scans revealed buccal expansion and relatively well-defined margin of the lesions. The clinical and radiographic features of the presented cases were compared with those of the desmoplastic ameloblastoma in the previous literatures. (Korean J Oral Maxillofac Radiol 2006; 36 : 63-8)

상악골 침범 소견을 동반한 선천성 침윤 지방종

허경회,이향옥,이서영,최형길,하병각,문제운,이삼선 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.2

Infiltrating lipoma is a rare mesenchymal neoplasm that, in spite of benign nature, characteristically infiltrates adjacent tissues and tends to recur after surgery. It has a predilection for the extremities and the trunk and is extremely rare in the head and neck region. We present a case of congenital infiltrating lipoma of the face, describing the intrabony invasion and osseous dystrophy as well as the soft tissue changes seen on plain radiographs and magnetic resonance imaging.

HBV : PE-001 ; Comparison of clinical outcomes between the antiviral-naive patients with entecavir treatment and the patients with adefovir add-on lamivudine combination treatment

( Woon Je Heo ),( Hong Joo Kim ),( Yong Kyun Cho ),( Byung Ik Kim ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.1

Background: The aim of the current study is to compare the clinical outcomes between the antiviral-naive patients with entecavir (ETV) treatment and the patients who received adefovir (ADV) add-on lamivudine (LVD) combination treatment. Methods: One hundred nineteen patients who initiated the entecavir 0.5 mg once a day (n=64) or adefovir add-on lamivudine combination treatment (n=55) from July 2006 to July 2010 were enrolled to the current study. Adefovir add-on lamivudine combination treatment was a rescue therapy for patients who exhibited genotypic resistance to lamivudine. Results: There were no significant differences in baseline demographic characteristics between the ETV and ADV add-on LVD treatment group, except for follow-up period (months, 36.1 ± 9.0 for ETV group vs. 48.8 ± 11.6 for ADV add-on LVD group, p < 0.01). Biochemical (normalization of serum ALT) and virologic (HBV-DNA undetectability (< 300 copies/ml)) responses at 6 months after the initiation of treatment were significantly more frequent in ETV group compared to ADV add-on LVD treatment group. However, there were no significant differences in the frequency of treatment failure (< 2log10 decrease in HBV-DNA 6 months after initiation of treatment), the emergence of viral breakthrough and genotypic resistance, the occurrence of hepatocellular carcinoma, and the progression of disease between ETV and ADV add-on LVD treatment groups. Conclusions: The long-term clinical outcomes between the antiviral-naive patients with ETV treatment and LVD resistant patients with ADV add-on LVD combination treatments were comparable in terms of the emergence of hepatocellular carcinoma and disease progression.

Virtual Reality Presentation for Nondestructive Evaluation of Rebar Corrosion in Concrete based on Inverse BEM

Je-Woon Kyung,Masaru Yokota,V. Leelaterkiet,Masayasu Ohtsu 한국비파괴검사학회 2005 한국비파괴검사학회지 Vol.25 No.3

Poster Session:PS 0223 ; Gastroenterology : The Frequency and Risk Factors of Anti-Tuberculosis Therapy-Induced Hepatotoxicity

( Je Woon Lee ),( Sang Su Lee ),( Hong Jun Kim ),( Chang Yoon Ha ),( Hyun Jin Kim ),( Tae Hyo Kim ),( Ok Jae Lee ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: Hepatotoxicity is one of common adverse effects of anti-tuberculosis therapy (ATT) and major etiology of suspension or failure of ATT. This study was conducted to evaluate the frequency of ATT-induced hepatotoxicity and its risk factors. Methods: We reviewed retrospectively the medical records of 2,204 patients who had taken ATT for =2 weeks from January 1, 2005 through June 30, 2010. The patients` demographic, social, clinical, and laboratory data were collected and analyzed for the relationships between hepatotoxicity and variables. Hepatotoxicity was determined by investigation of liver tests at the time of pretreatment and 1, 2, 4, 8, 12 and 24 weeks of ATT. Results: Among 2,204 patients taken ATT, 202 (9.2%) developed hepatotoxicity. Mean age of the patients with ATT-induced hepatotoxicity was 52.5 ± 18.7 years and 64.6% were male. Hepatotoxicity was more frequent in patients with abnormal baseline liver function than the ones with normal liver function (16.3% vs. 6.9%, p=0.000), hepatitis B virus (HBV) or hepatitis C virus (HCV) infected than non-infected (18.7% vs. 8.5%%, p=0.000), and the patients with hepatocellular carcinoma (HCC) than the ones without it (41.2% vs. 8.9%, p=0.000). Gender, age (>35 or 65 years), BMI, and alcohol drink were not signifi cantly related to ATT-induced hepatotoxicity. Abnormal baseline liver function, underlying HCC and HBV or HCV infections were risk factors for ATT-induced hepatotoxicity on univariate and multivariate analysis. The majority of patients (84.2%) developed hepatotoxicity within fi rst 30 days of ATT, and 31.7% within fi rst 7 days. Conclusions: The frequency of ATT-induced hepatotoxicity was 9.2%, and its risk factors were abnormal baseline liver function, and underlying HBV or HCV infection and HCC. Closed monitoring should be required for the patients with these risk factors during fi rst 30days of ATT, especially fi rst 7days.