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用于颅骨修复的多层微晶格生物材料的准静态压缩力学性能
Materials & Design
(
IF
8.4
)
Pub Date : 2022-06-20
, DOI:
10.1016/j.matdes.2022.110871
Yang Zhao
,
Qianqian Wu
,
Linzhi Wu
目前临床手术中使用的颅骨修复生物材料面临着力学性能不匹配、生物相容性差等问题。为了克服这些问题,基于颅骨结构特征提出了兼具合适的力学性能和生物相容性的多层微晶格生物材料(MB)。对MB的准静态压缩力学性能进行了实验、数值和理论研究,并得到了实验结果的验证。观察到典型的变形,例如明显的剪切区和节点的应力集中。上述 MB 试样的强度和模量分别在 86.72 ± 0.84 至 197.73 ± 0.74 MPa 和 2.99 ± 0.13 至 7.56 ± 0.54 GPa 的范围内。同时,具有梯度设计的 MB 的属性,包括正、通过有限元(FE)模拟研究负梯度和混合梯度。具有混合梯度的MB可以更好地匹配颅骨的结构特征。由于所设计的MB具有与颅骨相当的平面外压缩特性和适合细胞生长的生物空间,因此可以很好地植入人体以匹配周围颅骨组织。MB的洞察力与生物材料的设计约束相结合,为设计/调整颅骨修复生物材料提供了一种新的方法,可能会导致优化的临床颅骨手术效果。由于所设计的MB具有与颅骨相当的平面外压缩特性和适合细胞生长的生物空间,因此可以很好地植入人体以匹配周围颅骨组织。MB的洞察力与生物材料的设计约束相结合,为设计/调整颅骨修复生物材料提供了一种新的方法,可能会导致优化的临床颅骨手术效果。由于所设计的MB具有与颅骨相当的平面外压缩特性和适合细胞生长的生物空间,因此可以很好地植入人体以匹配周围颅骨组织。MB的洞察力与生物材料的设计约束相结合,为设计/调整颅骨修复生物材料提供了一种新的方法,可能会导致优化的临床颅骨手术效果。
"点击查看英文标题和摘要"
Quasi-static compressive mechanical properties of multilayer micro-lattice biomaterials for skull repair
Current skull repair biomaterials used in clinical surgery face problems such as unmatched mechanical properties and poor biocompatibility. To overcome these problems, the multilayer micro-lattice biomaterials (MB) combining both suitable mechanical properties and biocompatibility are proposed based on skull structural characteristics. The quasi-static compressive mechanical properties of MB are studied experimentally, numerically and theoretically, which are verified by experimental results. The typical deformations, such as distinct shear zone and stress concentration of nodes, are observed. The strength and modulus of the above MB specimens are in the range of 86.72 ± 0.84 to 197.73 ± 0.74 MPa and 2.99 ± 0.13 to 7.56 ± 0.54 GPa, respectively. Simultaneously, the properties of MB with gradient design, including positive, negative and hybrid gradient are investigated by finite element (FE) simulation. The MB with hybrid gradient can better match the structural characteristics of skull. Since the designed MB has out-of-plane compression characteristics comparable to that of skull and suitable biological space for cell growth, it can be implanted into the human body to matched surrounding skull tissue well. The insight of MB combining with design constraints of biomaterials provides a novel method for designing/tuning skull repair biomaterials that might result in the optimized clinical skull surgery effect.
更新日期:2022-06-25