Effect of solid to liquid ratio on the physical properties of injectable nanohydroxyapatite.

Injectable bone grafts based on nano hydroxyapatite, exhibiting a high cohesiveness were synthesized with three different solid to liquid (s/l) ratios. Effects of this ratio were studied on different structural and physical parameters of the injectable paste. Although crystallographic features remained insensitive to s/l ratio, we could observe the non linear correlations of zeta potential, cohesiveness, flowability and compressive strength of the injectable HA system as a function of s/l ratio.