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ACS Appl Mater Interfaces:可生物降解哌嗪基聚氨酯-尿素支架三维可增强再生骨

2019-02-01 MedSci MedSci原创

合成可生物降解的聚合物支架具有均匀互连的孔结构,适当的机械性能,优异的生物相容性和甚至增强的成骨能力,这是原位骨再生的迫切需要。在这项研究中,首次采用气动挤出3D打印技术开发了一系列具有PP含量梯度的可生物降解的哌嗪(PP)基聚氨酯-尿素(P-PUU)支架。结果显示,60wt%浓度的P-PUU油墨具有适合于支架制造的粘度。3D打印的P-PUU支架显示出相互连接的多孔结构,其大孔尺寸为约450μm,

合成可生物降解的聚合物支架具有均匀互连的孔结构,适当的机械性能,优异的生物相容性和甚至增强的成骨能力,这是原位骨再生的迫切需要。在这项研究中,首次采用气动挤出3D打印技术开发了一系列具有PP含量梯度的可生物降解的哌嗪(PP)基聚氨酯-尿素(P-PUU)支架。

结果显示,60wt%浓度的P-PUU油墨具有适合于支架制造的粘度。3D打印的P-PUU支架显示出相互连接的多孔结构,其大孔尺寸为约450μm,孔隙率为约75%。通过调节P-PUU支架中PP的含量,可以缓和其力学性能,PP含量最高的P-PUU1.4支架具有最高的压缩模量(155.9±5.7 MPa)和强度(14.8±1.1 MPa)。此外,体外和体内生物学结果均表明3D打印的P-PUU支架具有优异的生物相容性和骨传导性,以促进新骨形成。小分子PP本身首次被证实以剂量依赖的方式调节成骨细胞的成骨,最佳的骨传导浓度约为0.5 mM,这表明PP分子与机械行为,氮含量,P-PUU的亲水性和P-PUU的亲水性在提高P-PUU支架的骨传导能力方面起着重要作用。

因此,该研究结果表明,3D打印的P-PUU支架具有合适的互连孔结构,适当的机械性能和固有的骨传导能力,应该为骨再生提供有希望的替代方案。

原始出处:

Ma Y, Hu N, et al., 3D Printing of Biodegradable Piperazine-based Polyurethane-urea Scaffolds with Enhanced Osteogenesis for Bone Regeneration. ACS Appl Mater Interfaces. 2019 Jan 30. doi: 10.1021/acsami.8b20323. 

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  2. [GetPortalCommentsPageByObjectIdResponse(id=1956747, encodeId=5a281956e477f, content=<a href='/topic/show?id=7647e210ac' target=_blank style='color:#2F92EE;'>#FAC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7210, encryptionId=7647e210ac, topicName=FAC)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/B389FA68ECBF51BE2FE14093CF61F6AE/100, createdBy=eb8e2500096, createdName=夏天与十三菇凉, createdTime=Sun Nov 10 02:37:00 CST 2019, time=2019-11-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1655921, encodeId=c37716559213e, content=<a href='/topic/show?id=2a011829d7' target=_blank style='color:#2F92EE;'>#ACE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=1829, encryptionId=2a011829d7, topicName=ACE)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=635024767990, createdName=shanyongle, createdTime=Wed Jul 17 09:37:00 CST 2019, time=2019-07-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1279294, encodeId=3aa812e929408, content=<a href='/topic/show?id=316d1882bc' target=_blank style='color:#2F92EE;'>#ACS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=1882, encryptionId=316d1882bc, topicName=ACS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=102a153, createdName=yaanren, createdTime=Sun Feb 03 13:37:00 CST 2019, time=2019-02-03, status=1, ipAttribution=)]
    2019-07-17 shanyongle
  3. [GetPortalCommentsPageByObjectIdResponse(id=1956747, encodeId=5a281956e477f, content=<a href='/topic/show?id=7647e210ac' target=_blank style='color:#2F92EE;'>#FAC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7210, encryptionId=7647e210ac, topicName=FAC)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/B389FA68ECBF51BE2FE14093CF61F6AE/100, createdBy=eb8e2500096, createdName=夏天与十三菇凉, createdTime=Sun Nov 10 02:37:00 CST 2019, time=2019-11-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1655921, encodeId=c37716559213e, content=<a href='/topic/show?id=2a011829d7' target=_blank style='color:#2F92EE;'>#ACE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=1829, encryptionId=2a011829d7, topicName=ACE)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=635024767990, createdName=shanyongle, createdTime=Wed Jul 17 09:37:00 CST 2019, time=2019-07-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1279294, encodeId=3aa812e929408, content=<a href='/topic/show?id=316d1882bc' target=_blank style='color:#2F92EE;'>#ACS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=1882, encryptionId=316d1882bc, topicName=ACS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=102a153, createdName=yaanren, createdTime=Sun Feb 03 13:37:00 CST 2019, time=2019-02-03, status=1, ipAttribution=)]
    2019-02-03 yaanren
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