Calcium phosphate coatings were employed for medical implants such as dental or orthopedic for bone bonding. Essentially, these layers were dissolved by osteoclast and replaced with newly formed bone by osteoblast. Finally, the implant is fixed with bone without a gap in vivo, which is called “osseointegration”. In this situation, the implant and bone are fixed only by an anchor effect, therefore they aren’t fixed microscopically. If this coating layer isn’t dissolved easily, enhances bone formation, and adheres strongly with implants, implants will be expected much stronger bone bonding than osseointegration. We reported that dense without holes, high purity, and high crystallinity hydroxyapatite coating layer was fabricated on zirconia substrate by droplets eliminated type pulsed-laser deposition scheme, which was similar geometric configuration with the solar eclipse. Pressed and sintered -Tricalcium phosphate target was irradiated by a 4th harmonic of YAG laser in H2O gas at 0.1 T
|