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Calcium Carbonate Formation in the Presence of Biopolymeric Additives
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Characterization and dissolution of functionalized amorphous calcium phosphate biolayers using single-splat

Karlis A Gross1, Cara J Young, Mardi A Beck

  • 1Riga Biomaterials, Innovation and Development Centre, Riga Technical University, Latvia. kgross@rtu.lv

Acta Biomaterialia
|February 8, 2011
PubMed
Summary

This study reveals amorphous calcium phosphate (ACP) splat characteristics and solubility. Dissolution in buffer caused cracking and delamination, impacting biomaterial performance and thermal spray coatings.

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Area of Science:

  • Biomaterials Science
  • Materials Chemistry
  • Surface Engineering

Background:

  • Advancements in biomaterials rely on novel processing and characterization.
  • Amorphous calcium phosphate (ACP) is a promising biomaterial, but its splat behavior needs detailed investigation.

Purpose of the Study:

  • To characterize the morphology and solubility of amorphous calcium phosphate (ACP) splats.
  • To understand the degradation mechanisms of ACP splats under physiological conditions.

Main Methods:

  • Fabrication of ACP splats from molten hydroxyapatite particles (20-60 μm).
  • Classification of splat morphology (shape, cracking) and analysis of recoil effects.
  • Immersion of splats in pH 7.3 tris buffer to study dissolution and degradation over 15 minutes.

Main Results:

  • Recoil of molten droplets formed unique bowl-shaped splats, influenced by particle size.
  • Cracking was more frequent in splats with edge discontinuities.
  • Immersion in buffer induced dissolution, leading to progressive cracking and delamination of splat segments.

Conclusions:

  • Splat topography and dissolution behavior are critical factors in thermal spray coatings.
  • The observed degradation mechanisms (cracking, delamination) offer insights into biomaterial performance.
  • Individual splats show potential for use as tunable biolayers in various configurations.