• Maxillofacial Plastic and Reconstructive Surgery
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• 제21권2호
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• pp.120-130
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• 1999

This investigation studied the effect of ovariectomy on the temporomandibular joint (TMJ) of rat. Forty female Sprauge-Dawley strain white rats, each weighing about 200grams were used and divided into two groups. The one group was performed ovariectomy, and the other was performed sham operation. Both group were killed at the intervals of 3 days, 1, 2, 4, and 8 weeks postoperatively, paraffin section were stained with H&E, MT and histomorphometric study of the TMJ was performed in a synchronous manner with an sham operated control group The result were as follows: 1. At 4 weeks after ovariectomy, an adhesion between the inferior surface of the articular disc and the condyle was observed in the central portion. At 8 weeks after ovariectomy, a focal thickening of the bone (osteophyte) was observed in anterior portion and there was a marked decrease in the trabecular bone in the posterior region. 2. The thickness of cartilage zone was increased at 2 weeks postopratively in the central portion, and decreased at 4 weeks postopratively in the posterior portion. The thickness of transitional zone was decreased at 1 week postoperatively in the anterior and proliferating zone was decreased postoperatively. The thickness of articular zone was decreased at 3 days postopratively in the anterior portion, and decreased at 1 week postoperatively in the central portion. From the above finding, we could conclue that estrogen deficiency in rats causes alteration of TMJ in marked early stage.

• 한국방사선학회논문지
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• 제7권3호
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• pp.205-211
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• 2013

이 연구는 동결견 진단을 받은 환자에 대한 한국전통 정골요법(이하 KTO)을 적용하여 통증완화에 대한 유의성 연구가 진행하였던 환자를 대상으로 통증의 감소가 견관절의 가동범위도 증가하는지를 추가적으로 확인하기 위하여 진행하였다. 대상자는 총 14명으로 구성되어 있으며, 두 개 그룹으로 나누어 7명의 실험군과 7명의 대조군으로 하여 2그룹으로 나누어 연구를 진행하였다. 7명은 KTO를 총 10회 시술하고, 7명은 시술하지 않았다. 견관절의 가동범위의 경우 항목별로 살펴보면 KTO를 적용한 그룹은 가동치의 변화를 살펴보았을 때 굴곡(7.33) 신전(10.00) 외전(8.76) 내전(9.05) 외회전(8.10) 내회전(10.00)의 변화가 나타났다. KTO를 적용하지 않은 그룹의 가동치의 변화를 살펴보았을 때 굴곡(4.67), 신전(7.50), 외전(7.14), 내전(9.14), 외회전(6.59), 내회전(9.31)의 변화가 나타났다. 동결견 환자에게 한국전통정골요법을 적용하면 견관절의 가동범위 증가를 가져올 수 있음을 확인하였다.

• 대한골관절종양학회지
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• 제2권1호
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• pp.38-46
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• 1996

The traditional methodology in Ewing's sarcoma was chemotherapy and radiotherapy. Recently surgery is reemerging as an important therapeutic tool and some paper report increased survival with it. The purpose of this nonrandomized study is to evaluate our result of Ewing's sarcoma with surgery, retrospectively. We experienced 30 cases for seven years and among them 6 were extraskeletal. In location, axial was 10 cases and peripheral was 20. By Enneking's classification, state IIB was 26 cases and IIIB was 4. Eighteen patients took operation, chemotherapy and/or radiotherapy, and remaining twelve took chemotherapy and/or radiotherapy only. Type of operation was limb salvage in 16 cases and amputation 2. Average dosage of radiation was 45.1Gy. Six kinds of chemotherapeutic regimen were used, but among them main protocols were Ifosfamide-Adriamycin(17 cases) and IESS(Cytoxan, Adriamycin, Methotrexate, Vincristine:8 cases). Complications were as follows. In operation group, there were 3 local recurrence and one case of nonunion. In nonoperated group, one local recurrence and one pancytopenia resulting in death. Average follow up was 29.7 months. Kaplan-Meier's ten year actuarial survival rate for the whole 30 cases was 26.8%. Significant difference in survival exists between central and peripheral lesions(p=0.05, by log rank test). Types of chemotherapy and surgery itself showed no significance. But surgery is important in function and local control. More intensive chemotherapeutic regimen to prevent distant metastasis and combined surgery and radiotherapy may be needed in Ewing's sarcoma.

• 근관절건강학회지
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• 제29권1호
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• pp.60-68
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• 2022

Purpose: This study aimed to investigate the changes in reality shock among new nurses and their influencing factors to identify turnover reduction methods. Methods: A total of 146 new nurses from 6 general hospitals participated in the survey. The survey data were collected from August 5 to November 10, 2015. Results: The mean scores for factors related to turn over were 2.75 for nurse practice environment, 2.84 (4point scale) for reality shock, and 3.08 (5point scale) for turnover intention. A significant difference in the impact of reality shock was observed depending on whether the nurses selected their work unit (F=6.24, p=.003) and whether they could take the possibility of holiday on the desired day at will (t=-2.57, p=.013). Changes in reality shock correlated with turnover intention, with the 'increased reality shock' group demonstrating an odds ratio of 2.37 (CI: 1.41~3.98) for turnover intention. Conclusion: The current findings indicate the need for lowering reality shock and turnover intention by considering nurses' work-related characteristics and improving their practice environments. To further study the changes in reality shock new nurses experienced, additional research is warranted while homogenizing the participants in terms of preceptorship duration and timing of independence.

• 한국전문물리치료학회지
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• 제21권1호
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• pp.55-62
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• 2014

For professional drivers, there is a possibility to have musculoskeletal disorders on ankle joint due to repetitive pedaling operation. Therefore, this study have focused to examine ankle active range of motion (AROM), dorsiflexor strength, and pressure pain threshold (PPT) of tibialis anterior muscle (TA) in taxi drivers compared to a age-matched control group. Thirty male taxi drivers with at least 10 years of driving experience and thirty male sedentary workers were evaluated for ankle AROM, dorsiflexor strength, and PPT of TA. Multiple independent t-tests were used to identify significant differences between two groups. For the results, taxi drivers had significantly less AROM in dorsiflexion and greater AROM in external tibial rotation compared to the control group. Also, dorsiflexor strength and PPT of TA in taxi drivers was significantly lower than in the control group. This study indicates that the repetitive ankle movements associated with driving have an effect on ankle AROM, dorsiflexor strength, and PPT of TA and may lead to work-related musculoskeletal disorders on ankle. Professional drivers may need to be educated to prevent a potential musculoskeletal disorders associated with repetitive movement.

• 대한기계학회논문집 C: 기술과 교육
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• 제4권2호
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• pp.117-122
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• 2016

세계적으로 무인기 활용이 증가하고 이와 관련한 사고 보도도 잇따르고 있는 가운데 각국 정부 당국, 관련 기관 및 산업체 등에서는 무인기 운영 관련 정책 및 규정 제 개정을 위한 노력에 박차를 가하고 있다. 또한 이와 동시에 국제민간항공기구에서 관련 연구조직(UASSG, Unmanned Aerial System Study Group)을 통해 국제 표준 마련을 위한 공동 연구를 진행해 왔다. 최근에는 국제민간항공기구에서 무인기패널체(RPASP, Remotely Piloted Aircraft System Panel)를 조직하여 무인기의 민간공역 통합 운영을 목표로 관련 부속서, 표준 및 권고 등을 제 개정하기 위한 논의를 수행하고 있다. 본 논문에서는 국제민간항공기구의 무인기 정책 연구 및 개발 동향을 조사하고, 이를 통해 국내 무인기 정책 마련을 위해 필요한 사항을 제안하였다. 이는 국제적인 무인기 정책 및 규정 개발 동향을 파악하여 관련 산업개발 방향 설정 및 국내 규정 마련에 기초자료로 활용할 수 있을 것이다.

• 대한정형외과학회지
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• 제54권3호
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• pp.244-253
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• 2019

목적: 일반 수술용 침대와 길이가 짧은 대퇴 주대(short stem)를 이용하여 인공 고관절 전 치환술을 직접 전방 도달법(direct anterior approach, DAA)을 이용하여 시행하고, 임상적 영상의학적 결과를 변형된 전 측방 도달법(modified Hardinge; anterolateral approach, ALA)을 시행한 경우와 비교하여 알아보고자 하였다. 대상 및 방법: 2013년 1월부터 2015년 11월까지 단일 술자가 DAA로 인공 고관절 전 치환술을 시행한(DAA group) 102명(102예)과 동 수의 ALA를 사용한 환자(ALA group)를 후향적으로 비교 분석하였다. 수술시간과 출혈량을 비교하였고, 수술 후 통증의 개선 정도와 보행 능력 및 고관절의 기능 회복을 알아보았다. 영상의학적으로 비구 컵과 대퇴 주대의 삽입 위치를 평가하였고, 두 군 간에 발생한 합병증을 알아보았다. 결과: 출혈량은 DAA group에서 유의하게 적었다(p=0.018). 수술 후 3주까지는 하지 근력의 회복이 DAA group에서 유의하게 높았다(굴곡/신전력 p=0.023, 외전력 p=0.031). Harris hip score를 이용한 기능 평가는 3개월까지(p≤0.001), Koval score를 이용한 보행 능력 평가는 6주까지(p≤0.001) DAA group에서 유의하게 나은 결과를 보였고, visual analogue scale score를 이용한 통증의 개선은 7일까지는 DAA group에서 유의하게 높았다(p=0.035). 비구 컵의 경사각(p≤0.001)과 전염각(p≤0.001)은 DAA group에서 ALA group보다 더 안정 범위에 위치하였고, 대퇴 주대의 위치와 하지 길이는 통계적 유의한 차이를 보이지 않았다. DAA group에서 수술 중 2예의 대전자 골절이 발생하였다(p=0.155). 결론: 길이가 짧은 대퇴 주대를 이용하여 일반 수술 침대에서 시행하는 DAA는 수술 후 조기 기능 회복을 보이며, 술자에게 친숙한 해부학적 자세로 수술 중 영상 증폭기 사용이 간편하여 원하는 위치에 인공 관절물을 삽입하는 것과 하지 부동 방지에 유용한 도달법으로 생각된다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.264-267
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• 2005

COMS (Communication, Ocean, and Meteorological Satellite) will be launch at end of year 2008. For speedy and security communication of COMS, KARl (Korea Aerospace Research Institute) decided encryption and compression design. Encryption design is based on DES (Data Encryption Standard), so that encryption key generation and management are important issues in COMS operation. And Compression is based on loss and lossless JPEG (Joint Photographic Export Group) standard. JPEG is one of generally using compression algorithm in image.

• Archives of Plastic Surgery
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• 제36권5호
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• pp.543-547
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• 2009

Purpose: Adhesion is the most common and troublesome complication after repair of flexor tendon injury. Recently, use of sodium hyaluronate derivatives for adhesion prevention is increasing. A commercial product, Guardix$^{(R)}$, sodium hyaluronate(NaHe) combined with carboxymethylcellulose(CMC) has been newly developed as a preventive material for adhesion. We have investigated its effect in rabbits. Methods: Twenty seven male New Zealand white rabbits were operated under ketamine anesthesia. After tendon repair in zone II of the hind paw, Guardix$^{(R)}$(experimental group) or normal saline(control group) was administered. Biomechanical tests were performed to estimate adhesion formation at 2, 4, 8, and 12 weeks after the operation. Maximum tensile load to flex the distal interphalangeal joint 50 degree from its resting state(MTL50) was measured, depicting the amount of adhesion formed. Subsequently, breaking strength was assessed. Results: There were no postoperative complications such as infection, wound dehiscence, or hematoma. MTL50 was significantly lower in the experimental group than in the control group at 4, 8, 12 weeks (p<0.05). Mean value of MTL50 was 6.64N in the experimental group and 28.53N in the control group at 12 weeks after surgery. There were no significant differences in breaking strength. Conclusion: Our results indicate that Guardix$^{(R)}$ is helpful in reducing adhesion formation and does not interfere with normal healing processes of the tendon.

• 한방재활의학과학회지
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• 제20권1호
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• pp.61-77
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• 2010

Objectives : The purpose of this study was to investigate the effects of Bee Venom (BV) and Cervi Cornu Parvum pharmacoacupuncture (CC) in monosodium iodide induced arthritis rats. Methods : The subjects were divided into 5 groups ; Normal, Control (no treatment after MIA), BV (Bee Venom pharmacoacupuncture $100{\mu}{\ell}$ daily at Dokbi (ST35) after inducing MIA), CC (Cervi Cornu Parvum pharmacoacupuncture $100{\mu}{\ell}$ dailyat Dokbi (ST35) after inducing MIA) and BV+CC (Bee Venom pharmacoacupuncture and Cervi Cornu Parvum pharmacoacupuncture $100{\mu}{\ell}$daily at Dokbi (ST35) after inducing MIA). After each operation, the present author observed the motor behavior recovery, hematological (Prostaglandin E2, AST, ALT), histological and immunological changes. Rats were tested at the 7th, 14th and 21st day. Results : Results are as follows. 1. All the experimental groups were improved compared with control group in plantar test. 2. All the experimental groups were improved compared with control group in touch test for sensory evaluator. 3. All the experimental groups were significantly decreased compared with control group in prostaglandin E2. 4. In histological observations, knee joint in all the experimental groups were improved compared with control group. 5. In immunological observations, all the experimental groups were significantly decreased compared with control group in COX-1, 2. Conclusions : It can be suggested that Bee venom and Cervi Cornu Parvum pharmacoacupuncture may improve motor behavior, hematological, histological and immunological findings in MIA-induced osetoarthritis rats. Especially, combination of these two treatments will be somewhat better in osteoarthritis recovery and motor function improvement.