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In order to construct a bone scaffold structure with good biological properties, P-type, FRD-type homogeneous multi-porous scaffolds and P&FRD gradient multi-porous scaffolds with different porosities and unit cell scales were designed based on the triply periodic minimal surface(TPMS).The effects of unit cell types, porosities and unit cell scales on the mechanical and biological properties of TPMS multi-porous scaffolds were investigated by tests and finite element simulation.The results show that the internal pores of homogeneous and gradient multi-porous scaffolds based on TPMS have good connectivity.The mechanical properties of multi-porous scaffolds decrease with the increase of porosity, but the permeability increases with the increase of porosity.Increasing the unit cell scale can significantly improve the permeability of multi-porous scaffolds.The permeability of the gradient multi-porous scaffold is also affected by the seepage direction.The gradient multi-porous scaffolds can synthesize the performance characteristics of each homogeneous unit cell structure, and show different mechanical and biological properties in different regions of the scaffold, which is closer to the structure and biological properties of human bone.
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为构建具有良好生物学性能的骨支架结构,基于三周期极小曲面(Triply Periodic Minimal Surface, TPMS)设计不同孔隙率、单胞尺度下的P型、FRD型匀质多孔支架,以及P&FRD梯度多孔支架;并通过试验和有限元仿真的方法,探究单胞类型、孔隙率及单胞尺度对TPMS多孔支架力学和生物学性能的影响。研究结果表明,基于TPMS建立的匀质和梯度多孔支架内部孔道具有良好的连通性;多孔支架的力学性能随着孔隙率的增加而降低,但渗透性则随着孔隙率的增加而提高;增大单胞尺度可以明显提高多孔支架的渗透性;梯度多孔支架的渗透率还受渗流方向的影响;梯度多孔支架能综合各匀质单胞结构的性能特点,在支架不同区域表现出不同的力学和生物学性能,更接近人体骨骼的结构和生物学性能。
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秦世坤,男,1996年生,河南商丘人,硕士研究生;主要研究方向为计算机辅助设计与快速成型设备、仿生制造技术等;E-mail:qks13619875791@163.com。
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秦世坤,男,1996年生,河南商丘人,硕士研究生;主要研究方向为计算机辅助设计与快速成型设备、仿生制造技术等;E-mail:qks13619875791@163.com。
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P&FRD gradient porous scaffold, figureFileSmall=7UqvJTbV8/QAWvQYTVV1oQ==, figureFileBig=tMMYc6IKroCwp3xmpW/+1g==, tableContent=null), ArticleFig(id=1240594169488535655, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图1, caption=
P&FRD 梯度多孔支架, figureFileSmall=7UqvJTbV8/QAWvQYTVV1oQ==, figureFileBig=tMMYc6IKroCwp3xmpW/+1g==, tableContent=null), ArticleFig(id=1240594169685667958, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.2, caption=
Multi-porous scaffold sample, figureFileSmall=eO3ehgEjKDVpMgzIpOWiQw==, figureFileBig=Gh0mTuqNn8QOSqczTl1mvQ==, tableContent=null), ArticleFig(id=1240594169824079996, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图2, caption=
多孔支架试样, figureFileSmall=eO3ehgEjKDVpMgzIpOWiQw==, figureFileBig=Gh0mTuqNn8QOSqczTl1mvQ==, tableContent=null), ArticleFig(id=1240594169933131908, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.3, caption=
Boundary conditions of mechanical simulation, figureFileSmall=XG/ZiB5bn34QULdr3vx4Tg==, figureFileBig=9Mk4UJ4bzcKjY9DScNV68g==, tableContent=null), ArticleFig(id=1240594170046378129, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图3, caption=
力学仿真边界条件, figureFileSmall=XG/ZiB5bn34QULdr3vx4Tg==, figureFileBig=9Mk4UJ4bzcKjY9DScNV68g==, tableContent=null), ArticleFig(id=1240594170205761689, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.4, caption=
Results of test and simulation, figureFileSmall=hKMN4qqj4FHMVgQWTov0fg==, figureFileBig=KAxlh4vLRl5RcIIuPuG5zw==, tableContent=null), ArticleFig(id=1240594170348368029, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图4, caption=
试验结果与仿真结果, figureFileSmall=hKMN4qqj4FHMVgQWTov0fg==, figureFileBig=KAxlh4vLRl5RcIIuPuG5zw==, tableContent=null), ArticleFig(id=1240594170482585770, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.5, caption=
Stress distribution of P type homogeneous multi-porous scaffold, figureFileSmall=w7nwmWzBe1ngFPLD3urKXQ==, figureFileBig=jrrXkloELNQB0lj9NSoyNg==, tableContent=null), ArticleFig(id=1240594170558083245, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图5, caption=
P型匀质多孔支架的应力分布, figureFileSmall=w7nwmWzBe1ngFPLD3urKXQ==, figureFileBig=jrrXkloELNQB0lj9NSoyNg==, tableContent=null), ArticleFig(id=1240594170654552241, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.6, caption=
Stress distribution of FRD type homogeneous multi-porous scaffold, figureFileSmall=J6Vn96uABhMxTZHfJheTAA==, figureFileBig=9QMaJEEjrbV5OBemN5XsGg==, tableContent=null), ArticleFig(id=1240594170717466806, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图6, caption=
FRD型匀质多孔支架的应力分布, figureFileSmall=J6Vn96uABhMxTZHfJheTAA==, figureFileBig=9QMaJEEjrbV5OBemN5XsGg==, tableContent=null), ArticleFig(id=1240594170805547196, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.7, caption=
Stress distribution of P&FRD type gradient multi-porous scaffold, figureFileSmall=+Mqe73iT5kELCmWPH0ckRQ==, figureFileBig=i5B/a0c4rq/m4MZrBdPjvQ==, tableContent=null), ArticleFig(id=1240594170876850372, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图7, caption=
P&FRD型梯度多孔支架的应力分布, figureFileSmall=+Mqe73iT5kELCmWPH0ckRQ==, figureFileBig=i5B/a0c4rq/m4MZrBdPjvQ==, tableContent=null), ArticleFig(id=1240594170960736462, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.8, caption=
Fluid domain extraction process and fluid simulation boundary condition, figureFileSmall=+53lr/dXVWZYEqCRFujtgA==, figureFileBig=TE3qjFmyDl5ZjAtI75X58w==, tableContent=null), ArticleFig(id=1240594171057205459, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图8, caption=
流体域提取过程与流体仿真边界条件, figureFileSmall=+53lr/dXVWZYEqCRFujtgA==, figureFileBig=TE3qjFmyDl5ZjAtI75X58w==, tableContent=null), ArticleFig(id=1240594171145285850, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.9, caption=
Streamline distribution of P type,FRD type homogeneous multi-porous scaffolds, figureFileSmall=cXh7Fkl8tNUNEIUb5X5Opg==, figureFileBig=drz+n3Vo4G7tVYgR+MnCSQ==, tableContent=null), ArticleFig(id=1240594171229171937, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图9, caption=
P型、FRD型匀质多孔支架流线分布, figureFileSmall=cXh7Fkl8tNUNEIUb5X5Opg==, figureFileBig=drz+n3Vo4G7tVYgR+MnCSQ==, tableContent=null), ArticleFig(id=1240594171313058026, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.10, caption=
Streamline distribution of P&FRD type gradient multi-porous scaffolds, figureFileSmall=qYq5UdUgK3EpSFfGA0WXEw==, figureFileBig=Ts+zvzNj9OiVYDJIWQKlLg==, tableContent=null), ArticleFig(id=1240594172793647345, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图10, caption=
P&FRD型梯度多孔支架流线分布, figureFileSmall=qYq5UdUgK3EpSFfGA0WXEw==, figureFileBig=Ts+zvzNj9OiVYDJIWQKlLg==, tableContent=null), ArticleFig(id=1240594172978196730, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.11, caption=
Streamline velocity of gradient multi-porous scaffolds, figureFileSmall=lFsz8fJ/9kMdREwFt69Qgw==, figureFileBig=pioTYI0zqImuhqCPwqk56Q==, tableContent=null), ArticleFig(id=1240594173104025852, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图11, caption=
梯度多孔支架流线流速, figureFileSmall=lFsz8fJ/9kMdREwFt69Qgw==, figureFileBig=pioTYI0zqImuhqCPwqk56Q==, tableContent=null), ArticleFig(id=1240594173263409409, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.12, caption=
Velocity streamline distribution of P&FRD type gradient porous scaffold at different scales, figureFileSmall=ObhqtbDK0VEkHOVo8JcSvQ==, figureFileBig=2ep+89dwNlmG09QLgPfr5g==, tableContent=null), ArticleFig(id=1240594173364072712, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图12, caption=
不同尺度下的 P&FRD型梯度多孔支架的速度流线分布, figureFileSmall=ObhqtbDK0VEkHOVo8JcSvQ==, figureFileBig=2ep+89dwNlmG09QLgPfr5g==, tableContent=null), ArticleFig(id=1240594173582176525, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.13, caption=
Permeability of multi-porous scaffolds, figureFileSmall=Bkwd76gSL3rH+wejTTwGyA==, figureFileBig=PgX47zF0rQhhiSyD3URXlg==, tableContent=null), ArticleFig(id=1240594173699617043, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图13, caption=
多孔支架的渗透性, figureFileSmall=Bkwd76gSL3rH+wejTTwGyA==, figureFileBig=PgX47zF0rQhhiSyD3URXlg==, tableContent=null), ArticleFig(id=1240594173833834780, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.14, caption=
Pressure distribution of P&FRD type gradient multi-porous scaffold, figureFileSmall=9KmbgbJP/bt6yQ8l2sxl8g==, figureFileBig=SXvMNS7ZZy2W/fUZdqLJcw==, tableContent=null), ArticleFig(id=1240594173942886691, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图14, caption=
P&FRD型梯度多孔支架压力分布, figureFileSmall=9KmbgbJP/bt6yQ8l2sxl8g==, figureFileBig=SXvMNS7ZZy2W/fUZdqLJcw==, tableContent=null), ArticleFig(id=1240594174035161385, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.15, caption=
Permeability of multi-porous scaffolds with different scales, figureFileSmall=JSaU1WjZI8Z33l9TmhFGDw==, figureFileBig=NBq9ZjfVLAz9FtRUTgWRBA==, tableContent=null), ArticleFig(id=1240594174131630380, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图15, caption=
不同尺度多孔支架的渗透性, figureFileSmall=JSaU1WjZI8Z33l9TmhFGDw==, figureFileBig=NBq9ZjfVLAz9FtRUTgWRBA==, tableContent=null), ArticleFig(id=1240594174219710770, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.16, caption=
Normalization results of mechanical properties of TPMS multi-porous scaffolds, figureFileSmall=TAkfgDwrJRwNURjcjBXC5Q==, figureFileBig=FLHBFPFnIl1QmzLybHaikg==, tableContent=null), ArticleFig(id=1240594174324568373, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图16, caption=
TPMS多孔支架力学性能归一化结果, figureFileSmall=TAkfgDwrJRwNURjcjBXC5Q==, figureFileBig=FLHBFPFnIl1QmzLybHaikg==, tableContent=null), ArticleFig(id=1240594174429425979, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Fig.17, caption=
Normalized result of the performance of multi-porous scaffolds at different unit cell scales, figureFileSmall=hQQj3JIPFAHLiNG1W4JRNQ==, figureFileBig=dhiDfQ0ztv7UN8rD6FffZg==, tableContent=null), ArticleFig(id=1240594174534283582, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=图17, caption=
不同单胞尺度下多孔支架性能的归一化结果, figureFileSmall=hQQj3JIPFAHLiNG1W4JRNQ==, figureFileBig=dhiDfQ0ztv7UN8rD6FffZg==, tableContent=null), ArticleFig(id=1240594174676889925, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Tab.1, caption=
Mechanical test result of porous scaffolds
, figureFileSmall=null, figureFileBig=null, tableContent=
单胞类型 Unit cell type | 孔隙率 Porosity/% | 弹性模量 Modulus of elasticity/GPa | 屈服强度 Yield strength/MPa |
|---|
| P | 45 | 33.01 | 420.35 |
| 60 | 22.31 | 214.30 |
| 75 | 6.00 | 30.03 |
| FRD | 45 | 31.22 | 392.53 |
| 60 | 15.20 | 189.82 |
| 75 | 5.39 | 46.53 |
| P&FRD | 45 | 32.88 | 414.42 |
| 60 | 16.10 | 205.49 |
| 75 | 5.69 | 43.01 |
), ArticleFig(id=1240594174794330441, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=表1, caption=
多孔支架力学试验结果
, figureFileSmall=null, figureFileBig=null, tableContent=
单胞类型 Unit cell type | 孔隙率 Porosity/% | 弹性模量 Modulus of elasticity/GPa | 屈服强度 Yield strength/MPa |
|---|
| P | 45 | 33.01 | 420.35 |
| 60 | 22.31 | 214.30 |
| 75 | 6.00 | 30.03 |
| FRD | 45 | 31.22 | 392.53 |
| 60 | 15.20 | 189.82 |
| 75 | 5.39 | 46.53 |
| P&FRD | 45 | 32.88 | 414.42 |
| 60 | 16.10 | 205.49 |
| 75 | 5.69 | 43.01 |
), ArticleFig(id=1240594174945325392, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=EN, label=Tab.2, caption=
Permeability of human bones
, figureFileSmall=null, figureFileBig=null, tableContent=
| 研究者Researcher | 渗透率Permeability/m2 |
|---|
| TEO等[19]417-423 TEO et al. | 2.4×10-9~5.27×10-8 |
| NAUMAN等[20]517-524 NAUMAN et al. | 2.68×10-11~2.00×10-8 |
| 本文This article 1 mm | 2.25×10-10~1.23×10-8 |
| 本文This article 2.5 mm | 2.51×10-9~7.60×10-8 |
| 本文This article 5 mm | 9.79×10-9~29.3×10-8 |
), ArticleFig(id=1240594175050182998, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157299888846, language=CN, label=表2, caption=
人体骨骼的渗透率
, figureFileSmall=null, figureFileBig=null, tableContent=
| 研究者Researcher | 渗透率Permeability/m2 |
|---|
| TEO等[19]417-423 TEO et al. | 2.4×10-9~5.27×10-8 |
| NAUMAN等[20]517-524 NAUMAN et al. | 2.68×10-11~2.00×10-8 |
| 本文This article 1 mm | 2.25×10-10~1.23×10-8 |
| 本文This article 2.5 mm | 2.51×10-9~7.60×10-8 |
| 本文This article 5 mm | 9.79×10-9~29.3×10-8 |
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