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Compactibility study of calcium phosphate biomaterials
C Nicolazo1, H Gautier, M-J Brandao
1Laboratoire de Mécanique des Solides et des Matériaux FORSEM, Institut Universitaire de Technologie de Nantes, 3 rue du Maréchal Joffre, BP 34103, 44041 Nantes Cedex 1, France.
Biomaterials
|November 7, 2002
Summary
This study shows that fibrous calcium-deficient apatites (CDA) compact well under dynamic pressure, unlike biphasic calcium phosphate (BCP). Fibrous CDA is suitable for biomaterial applications due to its superior compactibility.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Powder Metallurgy
Background:
- Dynamic compaction is a novel method for forming ceramics without heating.
- Understanding powder behavior under dynamic forces is crucial for material consolidation.
- Calcium-deficient apatites (CDA) and biphasic calcium phosphate (BCP) are relevant biomaterials.
Purpose of the Study:
- Investigate the micromechanism of powder densification during dynamic compaction.
- Evaluate the compactibility of CDA and BCP powders under varying pressures.
- Determine the suitability of these materials for biomaterial applications.
Main Methods:
- Characterization of CDA and BCP powders (physicochemistry, particle size, rheology).
- Dynamic compaction experiments under various pressures.
- Analysis of compact properties (density, mechanical strength, disintegration time).
Main Results:
- BCP powders showed poor compressibility and could not be compacted.
- CDA powders, especially the fibrous form, exhibited good compactibility and mechanical properties.
- Fibrous CDA demonstrated high-quality filling potential for biomaterials.
Conclusions:
- Dynamic compaction is effective for consolidating fibrous CDA powders.
- Fibrous CDA is a promising material for biomaterial applications requiring high compactibility.
- BCP is unsuitable for dynamic compaction under the tested conditions.