CAPTAL ® Hydroxyapatite Coating
Hydroxyapatite Coating
Hydroxyapatite has been used in coatings since 1985 , with PBL coating one of the first cementless HA-coated hip implants on the market- the freeman femoral component in 1991. A 20-year follow-up study of this component reported a 99% survivorship rate, attributing improved stability to the HA coating. This is because our hydroxyapatite material is a synthetic approximation of the natural mineral phase of bone and this similarity triggers a natural healing response which promotes bone ingrowth and mineral deposition on the coating surface, providing implant fixation without the need for bone cement.
Our specialised spraying technology causes minimal damage to the hydroxyapatite structure during deposition, resulting in a final coating of with a higher degree of crystallinity (XRD crystallinity ratio typically exceeds 85%) compared to standard plasma spray approaches. As a more crystalline coating is less resorbable in vivo the coating loses less mass over time and maintains long term stability by reducing resorption of “bony ingrowths” which spot fuse the implant to surrounding bone tissue.
Physical Characteristics
BIOTAL ® Hydroxyapatite coatings use only CAPTAL® high-purity synthetic bone precursor material. BIOTAL ® coatings are thermally stable, retain a highly crystalline structure after the coating process and are osteoconductive.
BIOTAL ® coatings have been proven to be highly bio-compatible and mechanically stable in clinical use over a period of more than 20 years. Please contact us for a bibliography. All of our hydroxyapatite coatings comply with the ISO 13779 standard requirements
For more information on our Hydroxyapatite coatings, please download the technical data sheet below.
Examples of HA-Coated Devices
