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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Novel degradation flow-through chamber for in vitro biomaterial characterization
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Novel degradation flow-through chamber for in vitro biomaterial characterization

机译:用于体外生物材料的新型降解流通腔室

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The characterization of degradation of biodegradable materials for tissue regeneration is classically carried out in three steps: in vitro degradation analysis, in vitro cell culture, and in vivo animal experiments. Each step involves an increasing complexity and should serve a more sophisticated material selection, which serves as an orientation to clinical studies and the final application in patients. Recently, the usefulness of degradation analyses is being discussed. In this context, the aim of this work is to increase the importance of in vitro degradation analysis by using flowing media to move closer to the in vivo situation. In the long term, this should lead to a more sensitive biomaterial characterization as well as to a replacement of time-consuming static or quasi-dynamic incubation experiments. The practicability of the novel chamber is demonstrated in context of a degradation study of silica/collagen/calcium phosphate composites in flowing media with physiological (2.4 mM) and lowered (0.5 mM) calcium ion concentrations. This is done by comparison with static and quasi-dynamic incubation experiments. In order to keep all media regimes comparable to each other, for the dynamic experiment, a flow rate was chosen equivalent to the medium exchange in quasi-dynamic incubation. Under flow-through conditions, there is a clearly decreased tendency to lower the calcium concentration, so that a concentration close to the physiological initial situation can be continuously maintained.
机译:用于组织再生的可生物降解材料的降解特性通常分为三个步骤:体外降解分析、体外细胞培养和体内动物实验。每一步都涉及到越来越复杂的问题,应该为更复杂的材料选择服务,这是临床研究和患者最终应用的方向。最近,降解分析的有用性正在讨论中。在这种情况下,这项工作的目的是通过使用流动介质更接近体内情况来增加体外降解分析的重要性。从长远来看,这将导致更敏感的生物材料表征,以及取代耗时的静态或准动态培养实验。通过对二氧化硅/胶原/磷酸钙复合材料在具有生理(2.4mm)和较低(0.5mm)钙离子浓度的流动介质中的降解研究,证明了这种新型腔室的实用性。这是通过与静态和准动态培养实验进行比较来完成的。为了使所有培养基状态相互可比,在动态实验中,选择与准动态培养中培养基交换相当的流速。在流动条件下,钙浓度明显降低,因此可以持续保持接近生理初始状态的浓度。

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