张文友---Design and fabrication of biomimetic multiphased scaffolds for ligament-to-bone fixation
青岛研究院首篇英文论文“Design and fabrication of biomimetic multiphased scaffolds for ligament-to-bone fixation”在Materials Science and Engineering: C (IF=2.736)杂志发表并被SCI索引。
摘要：Conventional ligament grafts with single material composition can not effectively integrate with host bones due to mismatched properties and eventually affect their long-term function in vivo. Here we presented a multi-material strategy to design and fabricate composite scaffolds includingligament, interface and bone multiphased regions. The interface region consists of triphasic layers with varying material composition and porous structure to mimic native ligament-to-bone interface while the bone region contains polycaprolactone (PCL) anchor and microchanneled ceramic scaffolds to potentially provide combined mechanical and biological implant-bone fixation. Finite element analysis (FEA) demonstrated that the multiphased scaffolds with interference value smaller than 0.5mm could avoid the fracture of ceramic scaffold during the implantation process, which was validated by in-vitro implanting the multiphased scaffolds into porcine joint bones. Pull-out experiment showed that the initial fixation between the multiphased scaffolds with 0.47 mm interference and the host bones could withstand the maximum force of 360.31 ± 97.51 N, which can be improved by reinforcing the ceramic scaffolds with biopolymers. It is envisioned that the multiphased scaffold could potentially induce the regeneration of new bone as well as interfacial tissue with the gradual degradation of the scaffold and subsequently realize long-term biological fixation of the implant with the host bone.
关键词： Ligament-to-bone, multiphased scaffolds, fixation, PCL anchor, interface