중년여성의 골밀도와 운동 : 여성의 폐경기를 중심으로

석민화 서울대학교 스포츠과학연구소 2008 스포츠과학리뷰 Vol.2 No.1

현대인들은 수명이 늘어나고 노년기가 길어지면서 건강에 대한 관심이 증가되고 있다. 특히 여성은 남성에 비해 기대여명이 길고, 폐경기 이후 신체적, 생리적 변화를 겪으면서 심혈관질환, 당뇨병, 심근경색, 골다공증 등 성인병으로의 유병률이 증가하고 있다. 이는 이후 장기간의 병원생활, 신체 활동의 부자유, 사회생활의 부자유로 삶의 질에 큰 영향을 미치게 된다. 특히 여성호르몬인 에스트로겐의 저하로 골소실로 인한 골다공증 현상이 나타난다. 골에 대한 체중의 역학적인 부하를 증가시키고 골다공증을 예방하기 위한 방법 중 운동은 골밀도 감소를 억제하기 위한 효과적인 방법 중 하나이다. 이에 본 연구에서는 폐경기 여성의 신체적, 생리적 변화와, 그 중 골밀도 변화의 기전과 운동을 통해 유지‧향상하기 위한 선행연구를 알아보고자 한다. Health and related fitness are growing medical problems especially with the enhanced longevity in recently. Therefore, it is important to know the factors that regulate bone mass and to develop effective therapeutic methods. In addition, menopause transition may have an influence on circulating estrogen concentration, since ageing has been associated with a decrease physical activity and physical and physiological changes. Many studies suggest that enhancing the exercise training might be beneficial for menopausal women with reduced bone mass. It is demonstrated in the present study that exercise increases bone mass by reducing fat mass and increasing muscle mass.

하악구치부 유리단결손의 임플란트 수복에 관한 임상적 연구

손형민,오화선,임재석 고려대학교 임프란트 연구소 2000 임프란트연구지 Vol.2 No.1

Many long-term study have demonstrated the successful use of osseointegrated implants to replace posterior teeth in the partially dentate patients. Implant were recently selected as the treatment of the choice for this population, instead of the previous resolves for the shortened dental arch (removable partial dentures, single or multiple cantilevers, or continued premolar occlusion). Advantages of patients with implant-supported prosthesis included an improved masticatory apparatus, reduced stress on the remaining anterior segments of the dentition, esthetics, comfort, and psychological benefits etc. But, there are many obstacle to implant placement in posterior mandible. The shape, quantity, and quality of bone in the mandible as anatomicla limitation and heavy occlusal force as mechanical disadvantage are significant factors in deciding which implant options possible. Consideration of these factors is necessary for the successful diagnosis and implant treatment of partially edentulous arches. PURPOSE : The purpose of this retrospective longitudinal study is to evaluate the long-term outcome, determinants of outcome, and the type and prevalance of prosthetic complications in the series of the patients treated with implants in the partially edentulous posterior mandible. MATERIAL AND METHODS : A total of 107 consecutively placed implants were inserted in 38 partially edentulous patients and restored with single-tooth and fixed partial dentures restoration at Korea University Guro-hospital from April 1991 to December 1999. The patients ranged in age from 22 to 72 years, and 54% were female. We analysed statistically long-term outcome according to type. RESULTS : The results were as follows : 1. The overall outcome showed an implant success rate of 97.2% in posterior partially edentulous mandible 2. In the proportion of the fixture length ; 10mm (22.4%), 11.5-12.0mm (19.6%), 13.0mm (19.6%) fixture were respectively predominant in order. In the proportion of the fixture width ; 3.75mm (47.7%), 5.0mm (36.4%) were predominant in order. 3. According to surface types of fixture, success rate were pure titanium 95.9%, TPS coating 100%, HA coating 100%. 4. A total of the 107 implants showed 20 complications (18.7%) the most common complications (7cases) was loosening of the abutment screw and gold screw. 5. Prosthetic complications with regard to fixture number showed higher prevalence one implant (30%) two implant (12.9%), three implant (11.1%) in order. 6. According to the prosthetic type, complications of screw type were 10 cases and cementation type were 4 cases. CONCLUSION : This study offers efficacious results of implant supported fixed prostheses as an alternative to traditional prostheses in patients with posterior partial edentulism. Therefore, we think that implant prosthesis is a relatively safe and predictable method for restoring partially posterior edentulous areas.

원적외선 광조사에 의한 도핑되지 않은 반절연성 GaAs의 광전류 전이와 열자극 전류

김화민,박승환,김종재,고석중,최병두 대구효성가톨릭대학교 자연과학연구소 1994 基礎科學硏究論集 Vol.1994 No.1

도핑되지 않은 반절연성 GaAs의 광전류 급냉과 열적 회복효과를 조사하기 위하여, 성장 방법이 다른 두개의 반절연성 GaAs시료에 대해 원적외선 영역(hv≤1.12eV)의 광조사에 의한 열자극 전류(TSC)스펙트럼들이 측정되었다. LEC방법에 의하여 성장된 As가 풍부한 반절연성 GaAs시료에 대한 50K에서의 광전류의 급냉 과정은 두 단계로 대별된다. 광전류 값이 최소가 되는 시간으로 전이시간 t_T를 정의할 때, (1) IR 광조사 시간 t<t_T이면, EL2(기저상태)→EL2^*(준안정상태) 전이에 의하여 광전류가 감소하고, (2)t>t_T이면, persistent photocurrent (PPC)효과에 의하여 광전류는 다시 증가하였다. 이러한 차이는 성장 방법과 조성비에 따른 잔류불순물의 농도가 광전류 변화에 영향을 준 때문으로 판단된다. 한편, 광조사 시간에 따른 TSC 피크들의 급냉과 급냉된 피크들의 열적 회복에 대한 온도 의존성은 EL2의 기저상태와 준안정 상태 간의 전이 또는 열적 회복과정과 거의 일치하였다. 따라서, 광전류의 급냉 전과 후에 각각 다른 형태로 관측되는 TSC스펙트럼 구조는 EL2 또는 EL2^*와 직접적인 관련을 갖는 트랩들의 분포에 의해 결정되고, 이 트랩들은 EL2-점결함 또는 EL2-잔류불순물로 형성된 complex에 의한 것으로 추론되었다. To study the photoquenching and thermal recovery effects in undoped semi- insulating (Sl) GaAs,the thermally stimulated current (TSCI) spectra, by illuminating infrared light (hv≤ 1.12 eV), are measured with two different Sl-GaAs samples, grown by the liquid-encapsulated Czochraski (LEC) and the horizontal bridgeman (HB) methods. In the As-riched Sl-GaAs sample by LEC method, the photo-current (I_ph) quenching process at 50 K consists of the following two stages: (1) quenching of I_ph due to the transition EL2→EL2^* before a transition time t_T and (2) enhancement of I_ph due to persistent photocurrent (PPC) after t_T, where t_T is defined as the time in which I_ph becomes minimum. However, neither re-enhancement of I_ph nor PPC are observed in the Sl-GaAs sample by HB method. This distinction results from the difference on the concentration of residual impurities, dependent on the growing method and composition rate, in the above two samples. The illumination time dependence of the quenching of TSC peaks and the temperature dependence of their thermal recovery are nearly fitted into those of the ground-to-metastable-state transition or thermal recovery process of EL2. Asa result, it is inferred that the TSC spectral structure, showing different feature before and after IR-quenching, is determined by the distribution of traps associated directly with EL2 or EL2^* and the traps are originated from a complex of EL2-point defect or EL2-residual impurities.

무용수의 식사제한 후유증에 대한 생리학적 고찰

이석인,민경화 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

In recent years, eating disorders have increased and are appearing at younger ages. Dancers are usually placed to maintain the low body weight according to the physical demand of choreography and performance schedules. Such chronic dietary restriction exerts a bad effect on the body of dancers, Leptin is a hormone involved with satiety and energy balance and imposed to be an anti-obesity factor, In this study, the problems of chronic dietary restriction made by ballet dancer have been reviewed in the viewpoint of the function of leptin. We have consider the prevalence of eating disorder and the sequelae of dietary restriction such as menstrual dysfunction, bone loss, and some nutritional deficiencies. The physiological approach would be complementary to the self-questionnaire methods to assess the true prevalence of eating disorder end nutritional status of dancers.

남제주 화력발전소의 증설과 저감대대책의 영향 분석

이화운,김유근,정우식,오은주,임헌호,노순아,반수진,최현정,김민선,김헌숙 부산대학교 환경문제연구소 2002 環境硏究報 Vol.20 No.-

In the view of the results investigated the effect of air pollutants that is emitted from a new generator facilities, the total estimated concentration which is the summation of a contributional concentration and observational concentration is much less than that of atmospheric environment criterion for the air pollutants. So we can predict that the operation of the new generator facilities with mitigation equipment don't seriously affect around environment. At the same time, we compared the contributional concentration of before mitigation equipment with that of after it to examine the decreasing amount due to mitigation equipment. The result showed that the concentration of SO2, NO2 and PM-10 is reduced to 25%, 30% and 26% of original value, respectively.

미용업 종사자들의 피부, 호흡기 및 근골격계 자각증상에 관한 유병률

이종태,박봉진,엄상화,김성준,강동묵,손혜숙,정귀원,강민숙,박성희 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.3

Objectives: Present study was conducted to evaluate work-related symptom prevalence among hairdressers. Methods: Exposed group comprised 184 employee employed 73 hair salons in 6 district of Pusan city, and non-exposed group comprised 119 people living recent apartments. A trained interviewer interviewed them with organised questionnaire which included dermatologic, respiratory and musculo-skeletal symptoms. Results : Prevalence of hand eczema was 28.3% in exposed group, and 5.8% in non-exposed group. Adjusted odds ratio for age and atopy history was 4.30(2.34-7.93). Prevalence of respiratory symptom (coughing) in exposed group was 22.1%, and 9.4% for non-exposed group. Adjusted odds ratio for coughing which was adjusted for age, smoking and atopy history was 2.76(1.32∼5.78). Prevalences of musculo-skeletal symptoms among exposed group were neck(59.9%), shoulder(76.6%), upper back(41.2%), lower back(72.2%), arm and elbow(31.3%), wrist(44.2%), finger(35.0%), leg(71.1%). Adjusted Odds Ratios for musculo-skeletal symptoms which was adjusted for age were neck 2.13(1.29∼3.51), shoulder 2.52(1.50∼4.24), upper back 1.71(1.01∼2.88), lower back1.78(1.06∼2.99), arm and elbow 3.10(1.62∼5.94), wrist 2.09(1.23∼3.57), finger 4.83(2.41∼9.68), leg 3.46(2.07∼5.79). Conclusions : These results show that employees in hair salon are likely to have high risk for work-related dermatologic, respiratory and musculo-skeletal symptoms and diseases. Hence, prevention methods from those work-related diseases are required to be developed. Also, the scope of occupational and environmental medicine should be expanded to service area including hairdressers.

생약성분 항암제 Tianxian의 흡수동태에 관한 연구

양은정,김원배,심창구,이민화,정석재 서울대학교 1995 藥學論文集 Vol.20 No.-

하악 제1대구치의 치근 만곡에 영향을 주는 요인

최항문,이원진,허민석,이삼선,김정화,최순철,박태원 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Purpose : To find the cause of root curvature by use of panoramic and lateral cephalometric radiograph. Materials and Methods : Twenty six 1st graders whose mandibular 1st molars just emerged into the mouth were selected. Panoramic and lateral cephalometric radiograph were taken at grade 1 and 6, longitudinally. In cephalometric radio graph, mandibular plane angle, ramus-occlusal plane angle, gonial angle, and gonion-gnathion distance (Go-Gn distance) were measured. In panoramic radio graph, elongated root length and root angle were measured by means of digital subtraction radiography. Occlusal plane-tooth axis angle was measured, too. Pearson correlations were used to evaluate the relationships between root curvature and elongated length and longitudinal variations of all variables. Multiple regression equation using related variables was computed. Results : The Pearson correlation coefficient between curved angle and longitudinal variations of occlusal plane-tooth axis angle and ramus-occlusal plane angle was 0.350 and 0.401, respectively (p<0.05). There was no significant correlation between elongated root length and longitudinal variations of all variables. The resulting regression equation was Y=10.209+0.208X_(1)+0.745X_(2) (Y: root angle, X_(1): variation of occlusal plane-tooth axis angle, X_(2): variation of ramus-occlusal plane angle). Conclusion: It was suspected that the reasons of root curvature were change of tooth axis caused by contact with 2nd deciduous tooth and amount of mesial and superior movement related to change of occlusal plane. (Korean J Oral Maxillofac Radiol 2006; 36 : 55-62)

방사선사진에서의 골질과 임상적으로 평가한 골질 분류의 상관관계

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

Purpose : To investigate the validity of digital image processing on panoramic radiographs in estimating bone quality before endosseous dental implant installation by correlating bone quality in radiographic images with clinical bone quality classification. Materials and Methods : An experienced surgeon assessed and classified bone quality for implant sites with tactile sensation at the time of implant placement. Including fractal dimension eighteen morphologic features of trabecular pattern were examined in each anatomical sites on panoramic radiographs. Finally bone quality of 67 implant sites were evaluated in 42 patients. Results : Pearson correlation analysis showed that three morphologic parameters had weak linear negative correlation with clinical bone quality classification showing correlation coefficients of -0.276, -0.280, and -0.289, respectively (p<0.05). And other three morphologic parameters had obvious linear negative correlation with clinical bone quality classification showing correlation coefficients of -0.346, -0.488, and -0.343 respectively (p<0.05). Fractal dimension also had a linear correlation with clinical bone quality classification with correlation coefficients -0.506 significantly (p<0.05). Conclusion : This study suggests that fractal and morphometric analysis using digital panoramic radiographs can be used to evaluate bone quality for implant recipient sites. (Korean J Oral Maxillofac Radiol 2006; 36 : 25-32)

Comparison of tests for measuring maximal exercise ability in elite swimmers

Min-Hwa Suk,Kyung-Hun Yu,Yun-A Shin 한국운동재활학회 2016 JER Vol.12 No.3