인공 고관절 비구컵의 끼워맞춤에 따른 변형량의 예측
Deformation of Acetabular Cup due to the Press-fitting in Total Hip Arthroplasty
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Abstract
In a total hip arthroplasty, the artificial hip joint is composed of an acetabular cup and a femoral head. To minimize the wear of the joint, the bearing surface should be precisely spherical. There were concerns that the press-fitting of the acetabular cup to the pelvis may cause the deformation of the cup and accelerate the wear of the joint, but its in-vivo measurement was challenging. In this paper, 3 dimensional finite element(FE) models of a pelvis and acetabular cups of Metasul 50mm and Pinnacle 50-60mm cups were used to simulate the deformation of the acetabular cups. For Metasul cups, the change of inner radius with respect to the location and the maximum shrinkage of the inner radius were found. For the Pinnacle cups, maximum change of the outer diameter were found and compared with the literature. FE model showed that the maximum shrinkage of the inner radius of the Metasul cup was 23μm (1.0mm press-fit, Bone stiffness 17GPa case). The shrinkage occurred mainly on the anterior and posterior side of rim of the cup, and the amount was proportional to the press-fit amount. The diametric change of the Pinnacle cup was 0.16mm on average, which was in same range of the clinically reported value. In conclusion, under the normal condition the reduction of the inner radius of the Metasul cup was too small to cause the jamming or the excessive wear.
참고문헌 (13)
- Charnley, J, "Low friction arthroplasty of the hip: Theory and practice", ~
- Long, WT, "The clinical performance of metal-on-metal as an articulation surface in total hip replacement", Iowa Orthop J, 25, pp.10~16 (2005)
- Williams, S, "The 2007 otto aufranc award: Ceramic-on-metal hip arthroplasties: A comparative in vitro and in vivo study", Clin Orthop Relat Res, 465, pp.23~32 (2007)
- Dumbleton, JH, "Metal-on-metal total hip replacement: What does the literature say", J Arthroplasty, 20(2), pp.174~188 (2005)
- Silva, M, "Metal-on-metal total hip replacement", Clin Orthop Relat Res, 430, pp.53~61 (2005)
- "2006", 통권 : 220
- Liu, F, "Effect of bearing geometry and structure support on transient elastohydrodynamic lubrication of metal-on-metal hip implants", J Biomech, 40, pp.1340~1349 (2007)
- Liu, F, "Transient elastohydrodynamic lubrication analysis of metal-on-metal hip implant under simulated walking conditions", J Biomech, 39(5), pp.905~914 (2006)
- Chang, C, "Transfer of metallic debris from the metal surface of an acetabular cup to artificial femoral heads by scraping: Comparison between alumina and cobalt-chrome heads", J.of Korean Orthopaedic Research Society, 8(2), pp.137~143 (2005)
- Squire, M, "Acetabular component deformation with press-fit fixation", J Arthroplasty, 21(6), pp.72~77 (2006)
- "2006", 통권 : 220
- "2006", 통권 : 220
- Dalstra, M, "Development and validation of a three-dimensional finite element model of the pelvic bone", J Biomech Eng, 117(3), pp.272~278 (1995)