Journal of Experiental Mechanicals

Mbone仿真骨压缩及扭转生物力学等效性研究

Compression and torsion biomechanical equivalence study of Mbone

Received:August 12, 2023 Revised:October 07, 2023

英文关键词:mechanical equivalence compression torsion Mbone Sawbones femur

基金项目:

Author Name	Affiliation
LI Yu	1.College of Engineering, China Agricultural University, Beijing 100083, China； 2.State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
XIN Peng	Department of Orthopaedics, General Hospital of Southern Theater Command of PLA, Guangzhou 510010, Guangdong, China
LIU Moyu	1.State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China；2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
WANG Zhixuan	State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
WANG Jun*	1.State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China 2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China 3.Research Center for Frontier Fundamental Studies, Zhejiang Lab, Hangzhou 311121, Zhejiang, China
HUAN Yong*	1.State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China 2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

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中文摘要:

在临床应用及骨力学研究中，尸体骨样品稀缺且一致性较差，因此力学等效仿真骨不可或缺。美国Sawbones合成骨是目前世界上最具认可度的力学等效仿真骨，但其模型基于西方人开发，与中国人骨型有差异，尤其是股骨前弓角和前倾角与中国人有较大不同。本文旨在通过生物力学实验，研究基于中国人骨特点自研的新型力学等效仿真骨Mbone股骨的压缩及扭转力学性能，验证其力学等效性。本文测试并对比了新型自研力学等效仿真骨Mbone股骨和Sawbones股骨的压缩及扭转力学性能，结果显示：受压时，Mbone股骨压缩刚度比Sawbones略高7.2%，且其压缩破坏载荷在尸体骨范围内，破坏后呈现出与临床相符的股骨颈骨折；Mbone股骨内侧中段偏后方的压应变明显高于Sawbones，其他15个区域压应变与Sawbones高度一致。受扭时，Mbone股骨内旋扭转刚度比Sawbones略低6.7%，外旋扭转刚度比Sawbones低18.3%。Mbone力学等效仿真股骨在压缩及扭转力学性能上均表现出良好的力学等效性，且更贴合中国人骨型，因此认为其可以替代进口产品作为尸体骨的力学等效模型。

英文摘要:

Cadaver bone is often used in clinic and bone biomechanical research, but its samples are scarce and the consistency between samples is poor. Therefore, a simulated bone with mechanical equivalence to cadaver bone is indispensable. Sawbones is currently the most recognized artificial bone with mechanical equivalence, but it is developed based on the American bones, which is quite different from the Chinese bones, especially the femoral anteversion and anterior arch of the femur. The purpose of this paper is to research the compressive and torsional mechanical properties of the new Chinese mechanical equivalent simulation bone Mbone femur by biomechanical test, and to verify its mechanical equivalence. In this paper, the compression and torsion mechanical properties of the Mbone femur and Sawbones femur were tested and compared. Results showed that the compressive stiffness of Mbone femur was slightly 7.2% higher than that of Sawbones, and its compressive failure load was within the range of cadaver bones. After destruction, it presented a femoral neck fracture that was consistent with clinical cases. The posterior compressive strain in the middle of the medial femur of Mbone was significantly higher than that of Sawbones, and the compressive strain in the other 15 regions was highly consistent with that of Sawbones. When subjected to torsion, the inward torsional stiffness of Mbone femur was slightly 6.7% lower than that of Sawbones and the outward torsional stiffness was significantly lower than that of Sawbones. Mbone femur showed satisfactory mechanical equivalence in compression and torsion mechanical properties, and was more suitable for Chinese bone. Therefore, it is considered that it can replace imported products as mechanical equivalent samples of cadaver bone.

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