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首页> 外文期刊>Journal of biomedical materials research, Part A >Bone Response to 3D Periodic Hydroxyapatite Scaffolds With and Without Tailored Microporosity to Deliver Bone Morphogenetic Protein 2
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Bone Response to 3D Periodic Hydroxyapatite Scaffolds With and Without Tailored Microporosity to Deliver Bone Morphogenetic Protein 2

机译:骨对3D周期性羟基磷灰石支架的反应,有无微孔可提供骨形态发生蛋白2

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摘要

Three types of model hydroxyapatite (HA) scaffolds were implanted in the metacarpal and metatarsal bones of goats. Scaffolds, consisting of a latticed pattern of rods, were fabricated with a solid freeform fabrication (SFF) technique. All scaffolds contained macropores; some were also fabricated with micropores (5.2 +- 2.0 mu m). Recombinant human bone morphogenetic protein-2 (rhBMP-2) was added to some microporous scaffolds. rhBMP-2 caused increased percent filled with bone tissue compared to microporous scaffolds without rhBMP-2. Lamellar bone in the scaffolds was aligned perpendicular to the long axis of the bone near the junctions of the rods that make up the scaffold but was more random away from the junctions of rods. Microporous scaffolds stained beneath areas of contact with new bone. This staining might indicate either extracellular matrix (ECM) in the rods, byproducts of ECM production, or reaction of cellular products with the scaffold.
机译:将三种类型的模型羟基磷灰石(HA)支架植入山羊的掌骨和meta骨。用固体自由形式制造(SFF)技术制造由杆的格子图案组成的支架。所有的支架都包含大孔;一些也用微孔(5.2±2.0μm)制造。将重组人骨形态发生蛋白2(rhBMP-2)添加到一些微孔支架中。与没有rhBMP-2的微孔支架相比,rhBMP-2引起的骨骼组织填充百分比增加。支架中的层状骨垂直于骨骼的长轴排列,靠近构成支架的杆的交界处,但远离杆的交界处更随机。微孔支架沾染在与新骨接触的区域下方。这种染色可能表明杆中的细胞外基质(ECM),ECM产生的副产物或细胞产物与支架的反应。

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