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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Development of Multinuclear Giant Cells During The Degradation of Bioglass? Particles in Rabbits
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Development of Multinuclear Giant Cells During The Degradation of Bioglass? Particles in Rabbits

机译:生物玻璃降解过程中多核巨细胞的发育?兔子中的颗粒

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摘要

Bioglass~R particles of the compositions 45s5, 52s, and 55s were implanted in the distal femoral epiphysis of rabbits. Animals were sacrificed at 7, 28, and 84 days post-operatively and specimens investigated using electron microscopy and electron dispersive X-ray analysis. The intention was to correlate the finding of different types of multinuclear giant cells (MNGC) in the center of the implantation bed with earlier hypothesized accumulated particle eluates and changed particle compositions. The distribution of Si, Na, Ca, P, O, S, and Cl throughout the implantation bed was analyzed. Bioglass~R particles degraded either in Si-rich remnants or in CaP-shells. MNGC of foreign body giant cell type in high numbers as -well as of osteoclast-like type at later time intervals in small numbers were found on the surface of Si-rich as well as on Ca- and P-rich particle remnants. Osteoclast-like cells were detected on the particles after transformation in CaP-shells. It is concluded that the formation of different types of MNGC is determined by the composition of the substrate, that is, osteoclast-like cells develop exclusively on resorbable substrates. The absolute number of MNGC depended on the time after implantation and the solubility of the implant. Bone bonding, however, only occurred on Ca- and P-rich surfaces
机译:将组合物45s5、52s和55s的Bioglass_R颗粒植入兔子的股骨远端骨physi中。术后第7、28和84天处死动物,并使用电子显微镜和电子弥散X射线分析研究标本。目的是将在植入床中心发现的不同类型的多核巨细胞(MNGC)与较早假设的累积颗粒洗脱液和改变的颗粒组成相关联。分析了整个植入床中Si,Na,Ca,P,O,S和Cl的分布。生物玻璃R颗粒在富硅残渣或CaP壳中降解。在富含硅的表面以及富含钙和磷的颗粒残留物上发现了数量巨大的异物巨细胞型MNGC,以及后来出现的破骨细胞样细胞的数量少的MNGC。在CaP壳中转化后,在颗粒上检测到破骨细胞样细胞。结论是,不同类型的MNGC的形成取决于底物的组成,即破骨细胞样细胞仅在可吸收的底物上发育。 MNGC的绝对数量取决于植入后的时间和植入物的溶解度。但是,骨键仅发生在富含Ca和P的表面上

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