베어링 구름마찰의 발열상태에 관한 연구

오성섭,임재환,김경모,박태원,정인성 전북대학교 공업기술연구소 1997 工學硏究 Vol.28 No.-

This paper studied the heat generation of rolling friction in the rolling bearing. This contact temperature affects on the bearing stiffness and life. If the contact of the ball bearing is especially metal to metal, the life of the bearing is affected by the high shear and compressure stress. In order to compare with surface temperaure, temperature measurement at the contact point of the outer race was carried out by digital thermometer.

과도한 출혈을 동반한 다발성 안면부 외상 환자의 치험례

오성섭,유대진,김일규,최진호,김형돈,오남식,황홍준,Oh, Seong-Seob,Yoo, Dae-Jin,Kim, Il-Kyu,Choi, Jin-Ho,Kim, Hyung-Don,Oh, Nam-Sig,Hwang, Hong-Jun 대한악안면성형재건외과학회 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.1

Multiple facial trauma patient should be carefully treated because of severe bleeding on extraoral and intraoral wound, possibilty of airway obstruction and hypovolemic shock. Hypovolemic shock may be divided to hemorrhagic shock and non-hemorrhagic shock. Also hemorrhagic shock is divided to mild, moderate and severe shock according to the degree of blood volume depletion. Mild shock occurs in blood loss of less than 20% of blood volume and moderate shock does in blood loss of 20-40% of blood volume. And Severe shock occurs in blood loss of more than 40% of blood volume. The goal of emergency care of trauma patient is that respiration and perfusion should be recovered to satisfactory level and that normal vital sign is maintained. We reported the case of multiple facial trauma patient with severe bleeding and hopovolemic shock and metabolic acidosis who was treated with adequate supply of fluid transfusion, intubation, tracheostomy and emergency operation.

성남지역의 안악골 골절에 관한 임상적 연구

김일규,손성준,오성섭 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.4

This is a clinical and retrospective study who sustained a total of 306 maxillofacial bone fracture and who were treated in our department between 1990-1994. This results were obtained as follows : 1. The ratio of men to women was 3.2 : 1. 2. The age frequency was the highest in the third decade(35%). That of man was the highest in the third decade but that of women in the fourth decade. 3. In respect of incidence, the number of patients has not been increased year after year. There were the highest frequency in September and the lowest frequency in January. 4. The most frequent cause of facial bone fracture was fall down(40.2%), traffic accident(28.1%), fist blow(20.9%), industrial accident(6.2%) and others in order. 5. The most common location of facial bone fracture was mandible(69%), maxillar with zygoma and zygoma in order of frequency. 6. The age frequency of mandible was the third decade(36.5%), the fourth decade(23.2%) and the fourth decade(22.2%) and the fifth decade(15.6%) in order. 7. In respect of incidence of associated injuries, the ratio of absence to presence was 0.7 : 1. 8. In 306 patients of facial bone fracture, the frequency of associated injuries was laceration, extrimities, chest in order.

선상 낭포성 암종을 동반한 석회성 건막 섬유종의 치험예

김일규,오성섭 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.2

This is a case report of calcifying aponeurotic fibroma occurred in the right pterygopalatine fossa & ramus area accompanied by adenoid cystic carcinoma of the right sublingual gland of a 44-year-old female. Calcifying aponeurotic fibroma is benign tumor, but it is characterized by poorly marginated, infiltrated growth pattern and a stubborn tendency to local recurrence, but there is no record of malignant transformation or metastasis, and surgical management should be conservative(excision and reexcision). Most cases been reported at the hands and feet, but no reported case occuring in the head region is found in the literature. Adenoid cystic carcinoma is a slow-growing infiltrative tumor with high recurrence rate, and it's treatment requires radical excisin and radiotherapy. Wide surgical excision of tumor, RND and partial resection of mandible were done. And then, immediate mandibular reconstruction was performed by means of reimplantaion technique after autoclaving of the resected bone.

악안면 근막극감염의 임상적 고찰

오성섭(Seong-Seob Oh),박은진(Eun-Jin Park),김일규(In-Kyu Kim),김형돈(Hyung-Don Kim),최진호(Jin-Ho Choi),오남식(Nam-Sik Oh) 대한치과의사협회 2000 대한치과의사협회지 Vol.38 No.1

신체 타부위 손상을 동반한 악안면골 골절환자의 손상중증도 평점(Injury Severity Score)에 관한 임상적 연구

오성섭(Seong Seob Oh),이의웅(Eui Wung Lee) 대한구강악안면외과학회 1987 대한구강악안면외과학회지 Vol.13 No.2

This is a retrospective study about ISS (Injury Severity Score) of facial bone fractures with multiple injuries on other sites. The study was based on a series of 416 patients with facial bone fractures treated as patients at Severance Hospital and Won Joo Christian Hospital during the period of Jan., 1981 through Dec., 1986. The results were obtained as follows: 1. The most common location was head and neck (57%) among multiple injuries with facial bone fracture. The extremities (27%), chest (9%), abdomen (7%) were then next in order of frequency. 2. Mandible fracture was predominent as 39% and there were also zygoma fracture (25%), Le Fort Ⅱ fracture (24%), Le Fort Ⅲ fracture (12%). 3. In Dept. of first admission, Neurosurgery was predominant as 73% and Orthopedic Surgery (10%), Oral Surgery (6%), others in order. 4. The mean Injury Severity Score was 24 in survival patients and 38 in died patients, but there were variable changes on minimum and maximum score. 5. The most common causes of death were intracranial injury (60%) hypovolemic shock (12.5%), sepsis (12.5%), pneumothorax (6%) respectively. 6. Emergency operation was carried in 60 patients (14%) for facial bone fractures. 7. The ratio of male to female was 4.1: 1, and 3rd decade (37%) was the highest age group in incidence.

성인에 발생한 낭포성활액종

오성섭,전혜경,김일규 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.3

Cystic hygroma is the benign proliferation of lymphatic tissue and has been categorized as a part of a larger spectrum that includes lymphangiomas recently. The majority of lymphangiomas occur in the head and neck as cystic hygromas with the posterior cervical region as the most common site. Cystic hygromas present in infancy or early childhood as compressible masses that may rapidly and intermittently enlarge. Cystic hygromas of the head and neck are especially difficult to manage since enlargement cause serious sequela such as airway obstruction, feeding difficulties, and speech pathology. Surgical exision remains the treatment of choice. But complete extirpation of these lesions is often impossible, and recurrence rates are accordingly different respectively ; these are high in suprahyoid lesions compared with infrahyoid involvement. This is a case report about 22 year old male patient with cystic hygrom. We obtained the successful, functional and esthetic results by surgical excision of the mass. Therefore, we report the case with literatural reviews.

색채치료에 이용되는 가시광선 제시 시스템 개발

오성섭 ( S. S. Oh ),양길태 ( G. T. Yang ),유충기 ( C. K You ),홍철운 ( C. U. Hong ),송철규 ( C. G. Song ),김남균 ( N. G. Kim ),이강민 ( K. M. Lee ) 한국감성과학회 2001 춘계학술대회 Vol.2001 No.-

본 연구는 가시광선영역에서 각각의 색을 구현하여 색채치료에 이용하기 위한 시스템을 개발하는데 있다. 사용된 광원은 에너지 밀도가 전파장에 걸쳐서 일정한 Dichroic reflector hallogen lamp를 사용하였고, 광원에서 발생하는 적외선을 차단하기 위하여 IR filter를 사용하였다. 색채치료에 사용 가능한 순수한 파장의 색을 분리하기 위하여 long pass filter와 short pass filter로 구성되는 color filter set를 사용하여 구성하였다. 개발된 가시광선 제시 시스템은 빨강, 파랑, 노란 광을 낼 수 있도록 되어 있으며 각각의 광도는 2390 lx, 1020 lx, 17400 lx이다. 개발된 시스템의 객관적 효과를 검증하기 위하여 피부 서식균으로 항균 실험을 하나 결과 노란 광이 빨강이나 파란 광에 비해 세포성장 억제가 컸다. 대식세포와 피부암세포로 실시한 항염 실험은 각각의 색광에 대한 영향이 크지 않았다.

한국인 구강 편평세포암종에서의 Ha-ras gene의 점돌연변이(point mutation)에 관한 연구

오성섭(Seong Seob Oh),이의웅(Eui Wung Lee) 대한구강악안면외과학회 1994 대한구강악안면외과학회지 Vol.20 No.3

The possible causes of oral squamous cell carcinoma include smoking, alcohol, viruses and chemicals. About 24 oncogenes involving the Ha-ras gene are known to be related to human and animal cancer. The ras gene point mutation varies among different tumors; for examples, Ha-ras gene is more frequent in human bladder carcinomas, Ki-ras gene is more frequent in lung and colon carcinomas, and N-ras gene in hematological tumors. The Ha-ras gene point mutation of oral SCC(squamous cell carcinoma) is variant from the race and geography, it appears to be frequent(about 35%) in Indian, but appears to be rare(about 3%) in Western. This study was undertaken to investigate the rate of Ha-ras gene point mutation of the oral SCC in Korean. DNA extraction, PCR and SSCP, DNA sequencing of Ha-ras gene were done, and the point mutation was searched in the formaline fixed, paraffin-embeded tissues of the oral SCC from the 39 Korean patients (M:29, F:10). Results were as follows: 1. The exon 1 of Ha-ras gene of 39 oral SCC was found in the 3 types(A, B, Ctypes) of band shift in the SSCP. 2. Each SSCP type A & B (37cases) of exon 1 has a normal DNA sequence, and no point mutation was detected. 3. Confirmation of SSCP type C of exon 1 was not possible presumably because of the artifact associated with DNA template purities. 4. The exon 2 of the Ha-ras gene in 39 ora SCC was found as a regular type of band shift in SSCP universally. From these results, the point mutation of the Ha-ras gene of oral SCC in Korean proved to be rare, and other oncogenes than the Ha-ras gene may be related to carcinogenesis of oral SCC. Verifying the other oncogenes thought to be quite helpful in the treatment, prediagnosis, carcinogenesis of oral cancer.

패혈증으로 진행된 치성 감염 : 증례보고

오성섭(Seng Seob Oh),박은진(Eun Jin Park),김일규(Il Kyu Kim),최진호(Jin Ho Choi),김형돈(Hyung Don Kim),오남식(Nam Sik Oh) 대한구강악안면외과학회 1999 대한구강악안면외과학회지 Vol.25 No.4

Incidence and mortality rate of maxillofacial infection is relatively low in the era of antibiotics. Despite the use of antibiotics, delayed treatment, underlying systemic diseases, drug-resistant microorganisms may result in life-threatening situations. The deep neck infection developed from odontogenic infection may result in sepsis, mediastinitis, aspiration pneumonia, asphyxia. Sepsis is the most dangerous complication which can quickly result in a number of lethal situations. The treatment of sepsis includes awareness of such complication, use of sensitive antibiotics, removal of infection source, and hemodynamic, respiratory and metabolic support. We experienced a patient who died of sepsis, which developed from odontogenic infection. The initial diagnosis was a buccal space cellulitis. However, in spite of medical and surgical treatment, this progressed to Ludwig s angina and then deep neck infection and finally sepsis. On the 10th hospital day, the patient died of multiorgan failure caused by sepsis. 우수한 항생제 요법이후 치성 감염으로 인한 Ludwig s angina의 합병증으로 인한 사망은 극히 드문 것으로 알려져 왔다. 본 교실에서는 고혈압의 기왕력을 지닌 57세 여환이 하악 전치부의 치근단 농양을 원인으로 하는 좌측 협간극의 감염으로 인하여 개구장애와 동통을 주소로 내원하여 입원치료중, Ludwig s angina 및 심경부감염으로 확산되고 입원 10일째 패혈증과 성인 호흡장애 증후군(ARDS)및 산발성 혈관내 응고증(DIC)의 진단하에 사망한 증례를 통하여 패혈증의 소견과 진단 및 그에 따른 처치 등에 대한 지견을 얻었기에 진단과 예방에 도움을 주고자 문헌 고찰과 함께 보고하는 바이다.