• Title/Summary/Keyword: 인공 고관절

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Biomechanics of Hip and Hip Replacement Arthroplasty (고관절 및 인공 고관절의 생역학)

  • Lee, Young-Kyun;Choi, Ji Hye;Won, Heejae;Koo, Kyung-Hoi
    • Journal of the Korean Orthopaedic Association
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    • v.54 no.5
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    • pp.377-383
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    • 2019
  • The biomechanics study of the hip is aims to understand and explore the dynamic principles of weight transfer through the hip joint. This basic science knowledge can be applied in a variety of areas, including degenerative joint diseases and hip replacement arthroplasty. In particular, understanding of the biomechanics of the hip has led to the development of materials, design and fixation of implants, and it can be applied in various areas, such as the selection of surgical methods and the location of the implant. Moreover, it is essential to have good knowledge of the biomechanics of the hip to achieve better clinical results for patients. Therefore, this paper introduces the basic knowledge and biomechanical characteristics of a normal hip and hip replacement arthroplasty, which are needed to approach the biomechanics of the hip.

Painful Causes around Hip Joint and Evaluation using Ultrasonography (고관절 주위 통증의 원인과 초음파적 진단)

  • Han, Kye Young
    • The Journal of Korean Orthopaedic Ultrasound Society
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    • v.2 no.1
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    • pp.45-52
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    • 2009
  • Simple radiography, CT and MRI were used for the diagnosis of the hip disease. However ultrasonography could be a good diagnostic tool for the lesion of tendons and bursae. Another advantage of ultrasonography is its usefulness for the follow-up of these lesions. Nowadays hip ultrasonography expanded the horizon to the follow-up study of total hip arthroplasty. However, the limitation of ultrasonography is that there is disparity in results according to the physician's experiences. In this article ultrasonographic findings of normal structures and pathologic lesions of the hip joint are introduced and explained briefly.

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A Study on 3d Reconstruction and Simulated Implantation of Human Femur Using Consecutive CT-Images (연속된 CT-Image를 이용한 고관절 3d 형상의 재구성 및 Simulated Implantation System 구축에 관한 연구)

  • 민경준;김중규;최재봉;최귀원
    • Journal of Biomedical Engineering Research
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    • v.20 no.2
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    • pp.155-164
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    • 1999
  • In this paper, the prototype of SIS(Simulated Implantation System) for human femoral head is introduced. SIS is a software which carries on a virtual femoral head replacement surgery including 3d visualization as well as various numeric analyses between a patient's femur and artificial femur through certain stages of the image processing and of the computer graphics. Also, processes required after acquiring consecutive CT-images and projected image of an artificial femur are discussed, and the corresponding results including prototype of SIS are given.

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Saddle Prosthesis (안장형 인공 고관절 전치환술)

  • Park, I.H.;Ihn, J.C.;Lee, J.M.
    • The Journal of the Korean bone and joint tumor society
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    • v.1 no.2
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    • pp.133-144
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    • 1995
  • After resection of intraarticular, periacetabulum(P2) and pubic rami(P23) and extraarticular, proximal femur(P2-H12) by Enneking classification, reconstruction is very difficult. We experienced three cases of saddle prostheses for reconstruction after P2, P23, and P2-H12 resection in pelvic malignancies. Case 1 was a high grade chondrosarcoma in 36 year-old-man and P2 resection was done. But he died of disease 19 months after operation. Case 2 was a malignant giant cell tumor in 32 year-old-woman. P23 resection was given and she is disease-free 32 months after operation. Case 3 was an osteosarcoma of 27-year-old-man and P2-H12 resection was performed and he is disease-free postoperative 12 months now. According to MSTS functional evaluatin system, all three patients showed no pain(5), intermediate function(2), emotinally satisfied(3), one cane or crutch supported(1), limited walking(3), and minor cosmetic gait(3). There was no significant complication and no dislocation except intermittent inguinal hernia in case 2. All patients started crutch walking 3 weeks after operation. Around 6 months postoperatively, the preserved iliac wing(P1 component) was hypertrophied enough to endure the full weight bearing. All could have squating and kneeling positions. In conclusion, saddle prosthesis would be a very useful method of reconstruction after P2, P23, and/or H1-2 resection to shorten the operation time and to reduce the infection rate without significant loss of function.

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Structural Analysis and Design of Artificial Hip Joint by Using Finite Element Method (유한요소법을 이용한 인공 고관절의 역학적 거동 해석 및 설계)

  • 정재연;황운봉;하성규
    • Composites Research
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    • v.12 no.5
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    • pp.98-109
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    • 1999
  • An investigation has been performed to develop a nonlinear finire element method for the analysis of the long-term behavior of an artificial hip joint. The three dimensional multi-layered brick element is used to analyze the design performances of hip prodtheses with various materials and the thick laminated composite hip prostheses with various layup sequences. The used element can accommodate the varying material properties of the element and allow the ply-drop-off along the eleement edge. The nonlinear finite element analysis program has been verified by the comparison with the exact solution of the bean problem subjected to uniaxial loading. By using the program, the density changes and strength ratios of artificial hip joint are calculated according to the hip prosthesis materials and the layers of composite hip prosthesis. The numerical results are easily applied to evaluate design performances of a hip prosthesis, and decrease the difficulty and time of hip prosthesis design.

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Total Hip Arthroplasty in Patients with Avascular Necrosis of the Entire Femur (전체 대퇴골에 발생한 골괴사 환자에서 인공 고관절 전치환술)

  • Yi, Seung Rim;Im, Se Hyuk;Park, Sang Hoon
    • Journal of the Korean Orthopaedic Association
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    • v.54 no.3
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    • pp.281-286
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    • 2019
  • Avascular necrosis (AVN) is defined as the cellular death of bone and bone marrow components due to the loss of blood supply, and associated with post-traumatic or non-traumatic events. AVN usually involves the epiphysis of a long bone, such as the femoral and humeral heads, which are susceptible to osteonecrosis. Many studies have been conducted but they were restricted to investigations of femoral head avascular necrosis. The presence of osteonecrosis in the proximal femur may impair biological fixation after total hip arthroplasty. We report a 56-year-old male patient with avascular necrosis located not only at the femoral head, but also in the entire femur, including the medullary cavity, who underwent total hip arthroplasty 2 years earlier along with a review of the relevant literature.

A Study on the Contact Stress Analysis of the Artificial Hip Joint Using Finite Element Method (유한요소법을 이용한 인공 고관절의 접촉응력 해석에 관한 연구)

  • 김청균;윤종덕
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1996.10a
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    • pp.189-194
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    • 1996
  • The modern orthopaedics frequently uses the total hip replacement in the artificial hip joint. The wear in this joint requires the re-replacement of the hip joint beacuse it is under the severe load and friction conditions. To solve these problems the previous studies have been mainly focused on the development of the new materials. The research of new material, however, needs much time and effort since it should be experimented for its bio-compatibility, friction, and wear characteristics. To reduce the work, in this study, the finite element analysis is applied to find the new combination of the materials in the total hip replacement which has the excellent contact characteristics. The finite element uses MARC and the 5-node aximetric element. The results show that in case of acetabulum UHMWP has good characteristics, in femoral head, the $Al_2O_3$, and in stem, Ti6Al4V.

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Comparative Study of Compliance for Venous Thromboembolism Prophylaxis (American College of Chest Physicians Guideline and American College of Orthopedic Surgeons Guideline) in High Risk Patients with a Venous Thromboembolism (정맥혈전 색전증 고위험군에서 시행한 혈전색전 예방요법(American College of Chest Physicians 지침 및 American College of Orthopedic Surgeons 지침)의 준수율 비교 연구)

  • Suh, You-Sung;Nho, Jae-Hwi;Jang, Byung-Woong;Kang, Deokwon;Won, Sung-Hun
    • Journal of the Korean Orthopaedic Association
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    • v.54 no.4
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    • pp.317-326
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    • 2019
  • Purpose: To compare and analyze the rate of prevention of two venous thromboembolism prophylaxis guidelines in patients with artificial joint arthroplasty and hip joint fracture. Proper prophylaxis for preventing thromboembolism in orthopedic surgery is significant because of this fetal complication. Materials and Methods: This study compared and retrospective analyzed the rate of prevention using the medical records and radiographs of patients who underwent orthopedic surgery from March 2009 to February 2011 according to the American College of Chest Physicians (ACCP) guidelines and from March 2012 to February 2014 according to the American Academy of Orthopedic Surgeons (AAOS) guidelines. Results: The guidelines for venous thromboembolism prophylaxis have been applied to patients with artificial joint replacement and hip joint fracture, the compliance rate of the ACCP guidelines was 56.0% before surgery, 67.0% after surgery with chemical prophylaxis, and 80.5% with mechanical prophylaxis. In addition, the compliance rate of the AAOS guidelines was 74.1% with chemical prophylaxis, and 88.3% with mechanical prophylaxis, which was higher than the ACCP guidelines. The compliance rates of mechanical and chemical prophylaxis before and after surgery of the ACCP guidelines, and the compliance rate of mechanical and chemical prophylaxis of the AAOS guidelines were compared and analyzed. The results revealed statistical significance (p<0.05) before and after total knee replacement arthroplasty and hip joint fracture internal fixation and total high risk orthopedic surgery. Conclusion: Raising the compliance rate of prophylaxis of venous thromboembolism in high risk orthopedic surgery is necessary and people should follow the guidelines for a unified direction depending on which situation they are in.