Abstract
Factors influencing calcium phosphate deposition on three dimensional printed hydroxyapatite (3D printed HA) by biomimetic process including soaking times (2, 4 and 6 hrs), solution temperatures (23, 37 and 50 °C) and solution refreshment (refreshed and non-refreshed) were studied. It was found that the weight change of the samples increased with increasing soaking times at all temperatures regardless of solution refreshment. Using refreshed solution resulted in greater increase in weight change than using non-refreshed solution. In the case of solution temperature, two opposite trends were observed depending on the solution refreshment. Increasing solution temperatures in non-refreshed solution exhibited a decrease in the weight change whereas the increase in the weight change was observed when using refreshed solution. This could be related to the competition between the dissolution of 3D printed HA and the deposition of new calcium phosphate crystals during biomimetic process. Octacalcium phosphate and HA were found to be the main phases of biomimetically deposited 3D printed HA.
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