Application of dissolution experiments to characterise the structure of pulsed laser-deposited calcium phosphate coatings

Biomaterials. 1999 Aug;20(15):1401-5. doi: 10.1016/s0142-9612(99)00045-9.

Abstract

A dissolution test was performed with pulsed laser (Nd: YAG, 355 nm)-deposited calcium phosphate coatings composed of hydroxyapatite (HA) and alpha-tricalcium phosphate (alpha-TCP) in different proportions, as a result of the use of different deposition rates. During immersion in a Ca2+-free Hank's solution, the dissolution kinetics were determined while other structural and compositional properties of the coatings were derived. It was possible to infer that the alpha-TCP is distributed uniformly and that the coating is of a non-columnar compact grain structure. The mass ratio of the phases for each coating was also determined and was related to the X-ray diffraction intensities. When incomplete, the hydroxylation level of the HA in the coatings is completed after immersion.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Calcium Phosphates / chemistry*
  • Durapatite / chemistry*
  • Isotonic Solutions
  • Kinetics
  • Lasers
  • Microscopy, Electron, Scanning
  • Prostheses and Implants*
  • Solubility
  • X-Ray Diffraction

Substances

  • Calcium Phosphates
  • Hanks Balanced Salt Solution
  • Isotonic Solutions
  • alpha-tricalcium phosphate
  • tetracalcium phosphate
  • calcium phosphate, monobasic, anhydrous
  • Durapatite
  • calcium phosphate
  • calcium phosphate, dibasic, anhydrous