Calcium phosphate materials containing alumina: Raman spectroscopical, histological, and ultrastructural study
| Autor: | Alessandro Bertoluzza, M. Morocutti, V. Ottani, Alessandro Ruggeri, R. Simoni, Anna Tinti |
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| Rok vydání: | 1991 |
| Předmět: |
Calcium Phosphates
Ceramics Materials science Metaphosphate Biomedical Engineering Mineralogy chemistry.chemical_element Biocompatible Materials Calcium Spectrum Analysis Raman Bone and Bones Biomaterials symbols.namesake chemistry.chemical_compound Materials Testing Aluminum Oxide Animals Lamellar structure Ceramic Composite material Elastic modulus Biomaterial Prostheses and Implants Biomechanical Phenomena Rats chemistry visual_art Microscopy Electron Scanning visual_art.visual_art_medium symbols Thermomechanical analysis Glass Raman spectroscopy |
| Zdroj: | Journal of Biomedical Materials Research. 25:23-38 |
| ISSN: | 1097-4636 0021-9304 |
| DOI: | 10.1002/jbm.820250103 |
| Popis: | Variable alumina quantities were added to two types of calcium phosphate materials-hydroxyapatite ceramics with Ca/P = 1.67 and calcium metaphosphate glass with Ca/P = 1--in order to increase their mechanical properties. Raman spectroscopy shows that alumina interacts with the phosphate group of these materials, while thermomechanical analysis shows that their elastic modulus has a value similar to that of bone. Histological sections demonstrate that the surface in close contact with ceramic materials shows a good integration between bone and biomaterial. All ceramic specimens are penetrated by well-stained, presumably glycoprotein, matrix, that consistently forms a thin network in close contact with the implant. After 6 weeks bone growing on both ceramic and glass shows signs of maturation with a lamellar structure and an apparently normal mineralization. In the case of the glass, inside this newly formed bone, were often observed two layers, the internal one showing a well defined lamellar structure. |
| Databáze: | OpenAIRE |
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