Comparison of Porosity Measurement Techniques for Porous Titanium Scaffolds Evaluation
Comparison of Porosity Measurement Techniques for Porous Titanium Scaffolds Evaluation
复制标题
多孔钛支架评估的孔隙率测量技术比较
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
L. C. Pereira
中科院分区：
文献类型：
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作者：
M. Varella;A. Ribeiro;A. C. Moreira;Antonio M. C. Moraes;C. Appoloni;L. C. Pereira
多孔钛已被用于移植物和植入涂层，因为它允许毛孔和骨骼的机械联锁。对骨再生用多孔支架的评价是其制造的关键。孔隙率、孔大小、孔形状和孔均匀度是影响机械强度和生物功能的参数。本研究以纯钛粉末为原料，加入造孔剂，采用粉末冶金法制备了多孔钛样品。本文采用几何方法和伽马射线透射法、无损技术和金相图像处理等破坏性技术对孔隙度参数进行了定量评价。用扫描电子显微镜和光学显微镜对其孔形态和表面形貌进行了定性评价。对所获得的结果和所使用的技术的有效性进行了比较，以选择最适合表征多孔钛支架的技术。
Porous titanium has been used for grafts and implant coatings as it allows the mechanical interlocking of the pores and bone. Evaluation of porous scaffolds for bone regeneration is essential for their manufacture. Porosity, pore size, pore shape and pore homogeneity are parameters that influence strongly the mechanical strength and biological functionality. In this study, porous titanium samples were manufactured by powder metallurgy by using pure titanium powders mixed with a pore former. The quantification of the porosity parameters was assessed in this work by geometric method and gamma-ray transmission, the non-destructive techniques and metallographic images processing, a destructive technique. Qualitative evaluation of pore morphology and surface topography were performed by scanning electron microscopy and optical microscopy. The results obtained and the effectiveness of the techniques used were compared in order to select those most suitable for characterization of porous titanium scaffolds.