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- 저자 : 이상훈 ( Sahng Hoon Lee ) (검색결과 3 건)
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슬관절 전치환술에서 대퇴치환물의 회전정렬 -수동조작 시 연부조직 긴장을 고려한 방법-
한혁수 ( Hyuk Soo Han ),이상훈 ( Sahng Hoon Lee ),성상철 ( Sang Cheol Seong ),이명철 ( Myung Chul Lee ) 대한슬관절학회 2010 대한슬관절학회지 Vol.22 No.1
Purpose: This study was undertaken to introduce a modified gap technique using manual distraction for achieving proper rotational alignment of the femoral components in total knee arthroplasty (TKA) and we compared the accuracy of the rotational alignment of the femoral components in TKAs when using a navigation system with that of another conventional technique. Materials and Methods: We randomly used three different methods and implants (group 1: 3˚ external rotation from the posterior condylar axis method, group 2: a modified gap technique using manual distraction and group 3: a navigation system, Orthopilot(R)) in 92 patients. We measured the posterior condylar angles (PCA: the angle between the posterior condylar line and the transepicondylar axis) on computed tomography before and after surgery. Results: The analysis showed no significant differences of the demographic data (age, height, weight, body mass index) and of the mean PCAs for the rotational alignment of the femoral components between the three groups (preoperative PCA: 5.45˚ vs. 5.34˚ vs. 5.24˚, respectively; postoperative PCA: 1.91˚ vs. 1.17˚ vs. 1.37˚, respectively, p>0.05). However, the conventional 3˚ external rotation method showed a higher frequency of outliers (p=0.028). Conclusion: The modified gap technique using manual distraction showed a higher accuracy of the femoral rotational alignment compared with that of the 3˚ external rotation method by reducing the outliers, and the modified gap technique using manual distraction showed similar results compared with those of the navigation method.
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인공 슬관절 전치환술 시 적절한 대퇴 치환물의 회전 정렬을 위한 원위 대퇴골과 경골의 해부학적 고찰
장종범 ( Chong Bum Chang ),성상철 ( Sang Cheol Seong ),이상훈 ( Sahng Hoon Lee ),이명철 ( Myung Chul Lee ) 대한슬관절학회 2010 대한슬관절학회지 Vol.22 No.1
Purpose: This study aimed 1) to identify the rotational axis of the femur that provides a balanced 90˚ flexion space in TKA, 2) to assess the changes in the flexion space in deep flexion, and 3) to assess the changes in rotational alignment, with using the posterior condylar axis (PCA) as a guide, and as the changes are related to asymmetric cartilage erosion of the posterior condyle. Materials and Methods: The axial MR images of the distal femur in knee extension and the coronal images of the distal femur and the entire tibia at 90 and 130˚ were examined in 40 healthy adults. Results: The clinical transepicondylar axis (TEA) provides a balanced 90˚ flexion space on average. The balanced flexion space in 90˚ became an asymmetrical space with relative narrowing of the medial side in 130˚. Every 1 mm of asymmetrical cartilage erosion between the posterior condyles changed the femoral rotation by approximately 1˚ when using the PCA as a guide. Conclusion: This study suggests that the clinical TEA is the rotational reference that provides a balanced flexion space. When using the PCA as a rotational reference, a surgeon should consider the potential change in the rotational angle that is caused by asymmetrical cartilage erosion.
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반월상 연골 재생을 위한 친수화 처리 폴리다이옥사논 지지체의 제조 및 분석
조광준 ( Kwang Joon Cho ),송대근 ( Dae Kun Song ),오세행 ( Se Heang Oh ),고영주 ( Young Joo Koh ),이상훈 ( Sahng Hoon Lee ),이명철 ( Myung Chul Lee ),이진호 ( Jin Ho Lee ) 한국조직공학과 재생의학회 2005 조직공학과 재생의학 Vol.2 No.2
Biodegradable polymers have been widely used to fabricate porous scaffolds for three-dimensional (3-D) cell cultures to regenerate tissue-based artificial organs. Until now, poly(L-lactic acid), poly(glycolic acid), and poly(lactic-co-glycolic acid) as synthetic biodegradable polymers have been most widely used to fabricate 3-D scaffolds. However, these polymers have limitations for some applications because of their brittleness, hydrophobicity, and low cell adhesiveness. Recently polydioxanone (PDO) has been interested in the applications for tissue regeneration since this polymer has good elasticity as well as biocompatibility and biodegradability. However, porous scaffold fabrications from PDO were limited due to its poor solubility (solvents to dissolve PDO are few). In this study, we firstly fabricated porous PDO scaffolds (disc and meniscus shapes) using a melt-molding particulate-leaching method developed by our laboratory. This method does not need any solvents during the fabrication process. To improve the hydrophilicity and cell compatibility of the scaffolds, PDO was blended with polyvinyl alcohol (PVA) with different ratio. The hydrophilicity, morphology, porosity, and mechanical properties of the prepared PDO scaffolds were investigated. The PDO/PVA (5 wt%) blend scaffold was found to have sufficient hydrophilicity, mechanical strength, and elasticity for tissue engineering applications including meniscus regeneration.
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