Three dimensional fit and full analysis and three dimensional non-linear finite element analysis of newly designed femoral stems in cementless total hip arthroplasty.

非骨水泥全髋关节置换术中新设计股骨柄的三维拟合与全分析及三维非线性有限元分析

• 批准号: 07671577
• 负责人: IMURA Shinichi
• 金额: $ 1.22万
• 依托单位: Fukui Medical University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07671577/
• 关键词: cementless total hip arthroplasty; fit & fill; three-dimensional computer simulation; non linear three-dimensional finite element analysis; relative motion; 相対的変位量; Fit & Fill

The fit and fill of the femoral canal are critical to the success of cementless femoral stems in total hip arthroplasty. It is difficult for conventional stems to provide a good fit and fill for the femora of patients with secondary osteoarthritis. We designed two types of Fukui Medical School (FMS) stem with a proximal lateral flare that were different in the medial radius. We compared the fit and fill, the amount of stem-bone relative motions, and load transfer to the femur among the newly designed stems and conventional stems, using a computer simulation and non-linear 3-D finite element (FE) analysis (ADINA6.1 software). The mean proximal fit and total fit of the FMS stems were 46% and 53% respectively, with a significant improvement compared with other stems. The mean fill of FMS stems was 82% at the lower and of the lesser trochanter and 84% at the upper end of the isthmus, which were significantly higher than those of other stems. The FMS showed less proximal lateral relative motion and more load transfer to the proximal femur compared with conventional stem (Omnifit).It suggests that the FMS will be expected to have a better adaptation of the femur with secondary osteoarthritis and biomechanical stability than conventional stems in early postoperative period.

在全髋关节置换术中，股骨髓腔的匹配和填充对于非骨水泥型股骨柄的成功至关重要。传统股骨柄很难为继发性骨关节炎患者的股骨提供良好的配合和填充。我们设计了两种类型的福井医学院（FMS）股骨柄，其近端外侧扩口在桡骨内侧不同。我们使用计算机模拟和非线性三维有限元（FE）分析（ADINA6.1软件），比较了新设计股骨柄和传统股骨柄之间的匹配和填充、股骨柄-骨相对运动量以及向股骨的载荷转移。FMS股骨柄的平均近端配合和总配合分别为46%和53%，与其他股骨柄相比有显著改善。FMS股骨柄的平均填充率在小转子下端为82%，在峡部上端为84%，显著高于其他股骨柄。与传统股骨柄（Omnifit）相比，FMS股骨柄的近端外侧相对运动较小，载荷更多地转移到股骨近端，这表明FMS股骨柄有望在术后早期对继发性骨关节炎的股骨具有更好的适应性和生物力学稳定性。

项目成果

Bo A,Imura S,Okumura Y,et al.: "The femoral component for secondary osteoarthritis of the hip joints in Japan." Proceedings of the Eighth International Symposium on Computer and Communication Systems for Imaging Guided Diagnostics and Therapy. 927-932 (19

Bo A,Imura S,Okumura Y,et al.：“日本髋关节继发性骨关节炎的股骨成分。”

Imura S,Tanaka Y,Omori H,Bo A,Ando M: "Durability of the hip prosthesis." J Chubu Rheum.Assoc.27. 90-95 (1996)

Imura S、Tanaka Y、Omori H、Bo A、Ando M：“髋关节假体的耐用性。”