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通过有限元分析评估腓肠肌重建对股骨肿瘤旋转铰链膝关节假体应力分布的影响。

Assessing the influence of gastrocnemius reconstruction on stress distribution of femoral tumor rotating hinge knee prosthesis via finite element analysis.

作者信息

Jiang Jie, Zeng Fanwei, Tang Xiaodong

机构信息

Department of Musculoskeletal Tumor, People's Hospital, Peking University, Beijing, China.

Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China.

出版信息

Front Bioeng Biotechnol. 2024 Apr 19;12:1391298. doi: 10.3389/fbioe.2024.1391298. eCollection 2024.

DOI:10.3389/fbioe.2024.1391298
PMID:38707499
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11066193/
Abstract

BACKGROUND

After femoral oncological knee arthroplasty, some patients suffer from rotating axis fracture, which significantly impacts the life span of the rotating hinge knee (RHK) prosthesis. This research aimed to analyze the biomechanical response of anatomical gastrocnemius reconstruction and assess whether it could reduce the risk of rotating axis breakage by finite element (FE) analysis.

METHODS

A femur-prosthesis-tibia FE model was established using the data from CT scans. The mechanical properties of the RHK implant were quantitatively compared before and after gastrocnemius reconstruction at 6 angles: 10°, 20°, 30°, 40°, 50°, and 60°.

RESULTS

Our results showed that gastrocnemius reconstruction effectively altered the stress distribution around the rotating axis, considerably relieving the stress in the fracture-prone region. In addition, the peak stress in the rotating axis, bending axis, prosthesis stem, and femoral condyles decreased variably.

CONCLUSION

In distal femoral resection knee arthroplasty, the rebuilding of gastrocnemius substantially improved the stress distribution within the prosthesis, thereby having the potential to reduce the risk of prosthetic fracture and prolong the overall durability of the prosthesis.

摘要

背景

股骨肿瘤性膝关节置换术后，部分患者会发生旋转轴骨折，这对旋转铰链膝关节（RHK）假体的使用寿命有显著影响。本研究旨在通过有限元（FE）分析来分析解剖型腓肠肌重建的生物力学反应，并评估其是否能降低旋转轴断裂的风险。

方法

利用CT扫描数据建立股骨-假体-胫骨有限元模型。在6个角度（10°、20°、30°、40°、50°和60°）下，对腓肠肌重建前后RHK植入物的力学性能进行定量比较。

结果

我们的结果表明，腓肠肌重建有效地改变了旋转轴周围的应力分布，显著减轻了易骨折区域的应力。此外，旋转轴、弯曲轴、假体柄和股骨髁的峰值应力有不同程度的降低。

结论

在股骨远端切除膝关节置换术中，腓肠肌的重建显著改善了假体内部的应力分布，从而有可能降低假体骨折的风险并延长假体的整体耐用性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/770275de8b69/fbioe-12-1391298-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/749236b2b012/fbioe-12-1391298-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/053df5611a4b/fbioe-12-1391298-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/e2e6b634d71e/fbioe-12-1391298-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/4561672ef2cb/fbioe-12-1391298-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/06d323187124/fbioe-12-1391298-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/770275de8b69/fbioe-12-1391298-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/749236b2b012/fbioe-12-1391298-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/053df5611a4b/fbioe-12-1391298-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/e2e6b634d71e/fbioe-12-1391298-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/4561672ef2cb/fbioe-12-1391298-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/06d323187124/fbioe-12-1391298-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d99b/11066193/770275de8b69/fbioe-12-1391298-g006.jpg

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