(a)
(b)
Figure 4: Effect of sterilization and injection on mechanical properties: (a) the comparison of the mechanical spectra of sample characterized by [HA] = 5% and HA/DVS weight ratio of 5 : 1, before and after sterilization; (b) the comparison of the mechanical spectra of samples characterized by [HA] = 5% and HA/DVS weight ratio of 2.5 : 1, before and after injection through different needles.