Conversion of electrolytically deposited moneetite to hydroxyapatite

摘要

A highly crystalline and homogeneous HA coating was produced on pure titanium dental implants. The process involves electrolytic deposition of monetite and further conversion into pure HA by hydrothermal treatment. XRD analysis showed that the electrolytic coating consisted of high crystallinity monetite, while SEM analysis revealed crystals with a plate-like morphology. After hydrothermal treatment in NaOH, XRD analysis confirmed that the monetite was totally converted to high crystallinity HA. Observation of the specimens using SEM revealed that the plate-like monetite crystals were transformed to needle-shaped hydroxyapatite crystals. This finding is in contrast with previous studies on the transformation of brushite to hydroxyapatite which showed no morphological change.