成長에 따른 頭蓋顔面骨 變化에 대한 頭部 放射線 計測學的 硏究分析

朴承河,丁銓殷 고려대학교 의과대학 1991 고려대 의대 잡지 Vol.28 No.1

There is a change of the growth pattern and the growth rate of human crarniofacial bone with aging. The three dimensional growth of the each bone is different by the effect of the growth center. By the same token, the gross morphology can change as the bony skeleton changes. In this study, we studied the cephalometric films of normal male Koreans, age range from 7 to 16 years. And then, the data were compared to those from the adult group. The results are as followings ; 1. We are presenting the data of the height, depth, width, and cephalometric angles of the craniofacial skeleton of studied group. 2. The facial bony growth is slower than that of the cranial bone in each direction. The growth rate of the facial bone by depth, width and height is faster than that of cranial bone with the aging. 3. The horizontal growth of the mandible is slower than that of the maxilla and the cranium. 4. The proportional ratio of upper face to that of lower one is constant regardless of the age. The ratio was 43 : 57. 5. SNA and SNB angles are slightly increase with the growing age, but ANB angle is reduced with the aging. 6. As SN-MP and Pal-MP angle are reduced with the aging, so as the opening of the mandibular plane to the cranial bone. Although there is a increment of posterior mandibular height, the position of the mandibular symphysis is constant regardless of the age.

극초단파 이산화탄소 레이저를 이용한 레이저 박피의 피부 조직학적 변화에 대힌 실험적 연구

안덕선,위성윤,구상환,박승하 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.6

The purpose of this study was to evaluate the histological changes and depth of vaporization and thermal injury that occur after resurfacing using an ultrapulse CO2 laser on an animal model. It also addresses the appropriate fluence for skin resurfacing using the ultrapulse CO2 laser in clinical cutaneous surgery. The ultrapulse CO2 laser resurfacing of 9 guinea pig skins were investigated. Macroscopic and microscopic observation of the resurfacing sites were evaluated for 3 months. In groups 1,2, and 3 with a radient exposure if 250 mJ at 5 Watt were irradiated with 1,2, and 3 passes respectively. In groups 4,5, and 6,400 mJ at 5 Watt were irradiated with 1,2,and 3 passes respectively. In group 7,8, and 9,500 mJ at 5 Watt were irradiated with 1,2, and 3 passes respectively. the depth of resurfacing and thermal damage were investigated on the first day of application. The tissue reepithelialization and middermal wound healing were observed after 3 days, 1 week, 2 weeks, 4 weeks, 6 weeks, and 3 months, respectively. The results are as follows : 1. Macroscopically, unscarred skin reepithelialization was seen within 2-3 weeks. Reepithelialization occurred sequentially, beinning at group 1 and ending at group 9. 2. The mean vaporization depths were 13,16, and 22 μm in groups 1,2 and 3, respectively. In groups 4,5 and 6, the mean vaporization depths were 25,31, and 42 μm, respectively. In groups 7,8, and 9, the mean vaporization depths were 32,53, and 83 μm respectively. 3. The depth of thermal damage was approximately 50 μm in group 1, 70 μm in group 4, and 80 μm in group 7; namely it was proportioned to fluence. 4. In wound healing using laser resurfacing , reepithelialization was thicker than the control in groups 1, 2, 3, 4, 5, and 7 on the third day of application. In the other groups, reepithelialization was thinner than the control. All the groups lacked a granular therefore, showing immature appearance. After the first 2 weeks, reepithelialization of the wound using laser resurfacing resulted in the multiplying of epidermal layers. After 1 weeks, all the groups, except group 9, showed epidermal hyperplasia with a focal granular layer. After the second week, the epidermal layer was thicker than the first week. Also , the epidermis showed mature appearance including a granular layer. After the fourth week, the epidermal thickness decreased. In the sixth week, the epidermal thickness was 20-30% thicker and flatter than the control. 5. Capillary congestion and decreased dermal integuments and relative transversely arranged collagen fibers within the papillary dermis were observed at the end of the first week. By the end of 2 weeks, more marked capillary congestion and more transverse arrangement of collagen fibers were observed. By the end of 4 weeks, the restored papillary dermal collagen showed a relative compact configuration and a greater cellularity. By the end of 3 months, these transversely collagen fibers continued their transverse arrangement. In conclusion, the ultrapulse CO2 laser in an effective and safe modality for the resurfacing of aging skin and treatment of cutaneous lesions.

한단계 이개전방 피판을 이용한 남성형 탈모증의 치료

안덕선,윤을식,구상환,박승하 大韓成形外科學會 1996 Archives of Plastic Surgery Vol.23 No.6

Traditionally, the methods of treating male pattern baldness has been classified as hair graft, scalp transposition flap and scalp reduction. The most effective method of treating baldness in the frontal region in the flap technique, which is ideal for getting a sufficial amount of hair to cover an extensive area of baldness at one time. Since the first description by Dardour in 1983, the one-stage preauricular flap has shown the excellent result in the treatment of male pattern baldness. In this paper, the authors used One-stage Preauricular flaps to treat 15 frontal baldness patients with various causes from January, 1995 to April 1996. This method is suitable for Types II and III baldness, which, according to Hamilton classification, is a mild baldness where the hairline retreats in the front and the temporal region is a triangle. Its advantages include high hair density, anterior direction of hair growth, the fact that it can be done in a single stage under local anesthesia, and finally, an aesthetic result characterized by a pleasing frontal hairline with natural temporal recess. This surgical technique is not frequently used when reconstructing frontal hairline but it can bring satisfactory aesthetic results if conducted on the cautiously selected patients under the age of 40 who are non-smokers with good skin elasticity. The technique can also be applied primarily in reconstructing frontal hairlines of male pattern baldness patients belonging to other types of Hamilton classification. Adjuvant micrografting refined the frontal hairline for the most natural-appearing result.

국민건강영양조사자료를 이용한 한국 성인의 관절염 유병율 분석

박승하,이동숙,김영주 한국자료분석학회 2010 Journal of the Korean Data Analysis Society Vol.12 No.4

Arthritis is one of the most common chronic disease in Korean adults and its prevalence is constantly increasing recently. This study aim at identifying risk factors on the prevalence of arthritis of Korean adults by using "The Third Korea National Health and Nutrition Examination Survey(hereafter, KNHANES)". We analyzed the data of Korean adults over thirties and examined risk factors for Korean males and females separately so that risk factors which were available only for females were included in the analysis. Throughout logistic regression models that are adapted the sampling scheme of KNHANES we found the risk factors for all adults such as age, sex, education level, BMI, alcohol intake, and stress. For females only, risk factors such as age, education level, BMI, menopause, and the number of pregnancy were found; however for males only, age and alcohol intake were found significant. If more data were available then more precise result can be expected. 관절염은 우리나라 성인의 주요 만성질환 중 하나로써 최근에 관절염 유병율이 꾸준히 증가하고 있는 추세이다. 본 연구는 국민건강영양조사자료의 3기 자료를 이용하여 한국 성인들의 관절염 유병율에 영향을 미치는 위험인자를 파악하는 데 목적을 두고 있다. 한국 30대 이상의 성인들을 대상으로 하되, 남성과 여성에 대한 관절염 위험인자를 각각 파악하였으며 이를 위하여 여성에 대한 위험인자를 추가 조사하였다. 국민건강영양조사자료의 표본추출방법을 고려한 로지스틱 회귀모형을 이용하여 조사한 결과, 성인 전체에 대한 관절염 위험인자는 나이, 성별, 교육수준, BMI, 음주여부, 스트레스로 나타났다. 그러나 여성만을 대상으로 조사한 경우 나이, 교육수준, BMI, 폐경여부, 임신횟수가 유의하게 나타났고, 남성만을 대상으로 조사한 경우 나이와 음주여부가 위험인자로 나타나 남성과 여성 사이에 관절염 위험인자에 차이를 보였다. 좀 더 충분한 자료가 얻어진다면 보다 정확한 결과를 얻을 수 있을 것으로 기대된다.

제2형 당뇨병에서 좌심실질량지수의 증가에 대한요미세알부민 배설량의 임상적 의의

박승하,이원영,김선우 대한당뇨병학회 2002 Diabetes and Metabolism Journal Vol.26 No.6

法의 使命

朴勝夏 건국대학교 1961 學術誌 Vol.3 No.1

웃음을 찾은 아이

박승하 샘터사 1998 월간 샘터 Vol.29 No.2

成長에 따른 頭蓋顔面骨 變化에 대한 頭部放射線計測學的 硏究 分析

정전은,박승하 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.5

There is a change of the growth pattern an growth rate of human craniofacial bone with aging. The three dimensional growth of each bone is influenced by their growth center. By the same token, the gross morphology may change as the bony skeleton changes. In this study, we studied the cephalometric films of young Korean male with age range from 7 to 16 years. And then, the data were compared to those from the adult group. The results are as followings; 1. We are presenting the data of the height, depth, width, and cephalometric angles of the craniofacial skeleton in each age. 2. The facial bony growth is slower than the cranial bone growth in each direction. The growth rate of the facial bone by depth, width, and height is faster than that of cranial bone with aging. 3. The horizontal growth of the mandible is slower than that of the maxilla and the cranium. 4. The proportional ratio of the upper face to lower one is constant regardless of the age. The ratio was 43:57. 5. The SNA and SNB angles are slightly increased with aging, but ANB angle is reduced with aging. 6. As the SN-MP and Pal-MP angles are reduced with aging, so as the opening of the mandibular plane to the cranial bone. Although there is a increment of posterior mandibular height, the position of the mandibular symphysis is constant regardless of the age.

외적-조절 상황에서의 숙련도와 시각탐색 전략

박승하,김선진,박근상 대한인간공학회 2002 대한인간공학회 학술대회논문집 Vol.- No.-

본 연구는 외적-조절의 특성을 가진 배구 종목을 대상으로 하여 상대팀 세터의 세트 방향을 예측하는 데에 필요한 사전시각단서를 획득하기 위한 시각탐색 전략의 숙련도에 따른 차이를 밝히는 것을 그 목적으로 하고 있다. 시각탐색 전략의 결과는 평균시선고정시간과 시선고정위치로 살펴보았다. 그 결과, 기술 숙련도가 높을수록 높은 탐색율, 즉 시선의 고정시간이 적고 이동 수가 많은 시각탐색 전략을 사용하는 것으로 나타났다. 또한 세터 조건에서는 숙련자는 세터의 머리 영역에 초보자는 세터의 상체 영역에 시선을 고정하는 시간의 비율이 높았으며, 단순 및 복잡 공격 조건에서는 숙련자가 다른 두 집단에 비하여 공격자 영역에 대한 시선고정시간의 비율이 매우 높은 것으로 나타났다. 이는 숙련도와 상황 조건에 따라서 주로 활용하는 사전시각단서가 다르다는 것을 의미하는 것이다.

운동숙련 연구에 대한 고찰 : 지각 기술 훈련을 중심으로

박승하 서울대학교 체육연구소 2000 서울大學校 體育硏究所論集 Vol.21 No.2

This review is focused on the research findings concerned with training of perceptual skill in motor expertise as well as the introduction and theoretical approaches of motor expertise. Although there exist some historical precedents to the morden study of motor expertise, a concerted research focused upon motor experts, especially sport applications, is a relatively recent phenomena. Also, the multidisciplinary and inter-disciplinary research on motor expertise result from the growing interest in expertise in the motor learning and control field. The majority of published research on motor expertise in motor learning and control field, has been concerned with the more theoretical issues of describing the experts' charateristics and developmental precess of motor expertise, including perception, making-decision, and motor execution. Skilled perception, in particular, is considered as an important determinant of sports expertise. Thus, perceptual skills, such as processing of contextual information, visual search strategy, and expectation, and training methods of perceptual skills is thought hot topics in motor expertise.