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- 저자 : 안옥균(Ok Kyun Ahn) (검색결과 12 건)
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슬관절 전치환술에서 후방 안정 임플란트의 오정렬이 경골 기둥에 미치는 영향
김상훈,안옥균,배대경,김윤혁,김경수,이순걸,Kim, Sang-Hoon,Ahn, Ok-Kyun,Bae, Dae-Kyung,Kim, Yoon-Hyuk,Kim, Kyung-Soo,Lee, Soon-Gul 대한의용생체공학회 2007 의공학회지 Vol.28 No.1
Recently, it has been reported that the posterior stabilized implant, which is clinically used for the total knee replacement (TKR), may have failure risk such as wear or fracture by the contact pressure and stress on the tibial post. The purpose of this study is to investigate the influence of the mal alignment of the posterior stabilized implant on the tibial post by estimating the distributions of contact pressure and von-Mises stress on a tibial post and to analyze the failure risk of the tibial post. Finite element models of a knee joint and an implant were developed from 1mm slices of CT images and 3D CAD software, respectively. The contact pressure and the von-Mises stress applying on the implant were analyzed by the finite element analysis in the neutral alignment as well as the 8 malalignment cases (3 and 5 degrees of valgus and varus angulations, and 2 and 4 degrees of anterior and posterior tilts). Loading condition at the 40% of one whole gait cycle such as 2000N of compressive load, 25N of anterior-posterior load, and 6.5Nm of torque was applied to the TKR models. Both the maximum contact pressure and the maximum von-Mises stress were concentrated on the anterior-medial region of the tibial post regardless of the malalignment, and their magnitudes increased as the degree of the malalignment increased. From present result, it is shown that the malalignment of the implant can influence on the failure risk of the tibial post.
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정덕환,한정수,김진원,안옥균,조종훈,Chung, Duke-Whan,Han, Chung-Soo,Kim, Jin-Won,Ahn, Ok-Kyun,Cho, Jong-Hoon 대한미세수술학회 1993 Archives of reconstructive microsurgery Vol.2 No.1
The authors analyzed the clinical results of the reconstructive surgery for injured hands and feet due to frostbites and electrical burn with microsurgery in 7 patients, 12 cases at the department of orthopaedic surgery, school of medicine, Kyung Hee university from Jan. 1989 to Jul. 1992, and the results were as foollowings. 1. The age at the time of injury was av 24.6 yrs ranging from 4 to 35 yrs, and all cases were male. 2. The follow up period was av. 24.4 Mo ranging from 12 Mo. to 56 Mo. 3. The causes of injury were frostbite in 9 cases, electrical burn in 2 cases. 4. Initial operative treatment was performed av. 69.3 days ranging from 2 to 210 days. 5. For the reconstructive procedure, scapular free flap was applied in 6 cases, radial forearm flap in 4, dorsalis pedis 1ffap in 1, neurovascular island flap in 1. 6. Among total 12 cases, there were 5 cases(41.7%) of wound infection and 3 cases (25.0%) of partial necrosis of donor flap. 7. In 11 cases(90.1%), the end result was satisfactory. In the analysis of above results the reconstruction with microsurgery is effective procedure for reconstruction of Injured hand and foot due to frostbite and electrical burn.
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이승(Seung Lee),남궁재균(Jae-Kyun Namgung),모형규(Hyung-Kyu Mo),안옥균(Ok-Kyun Ahn) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
The noise generated by the engine propagates into the air and it can be radiated as noise inside the vehicle interior. One of the best ways to reduce the interior noise is to identify noise source. Engine encapsulation has not only reducing the noise but reducing the engine friction on the thermal management of the engine. This paper presents the noise contribution analysis of the engine encapsulation to reduce the interior noise level and analyze the temperature change of engine oil by the engine encapsulation.
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