In order to estimate the porosity of scaffolds, the
volume of the scaffolds was calculated using the mea-
sured diameter and height of cylindrical scaffold sam-
ples. The mass of the scaffold was measured using an
analytical balance. The measured density of scaffolds
was calculated from this volume and mass. The porosity,
e
, of a scaffold was calculated from the measured density
D
m
and the skeletal density
D
s
of the scaffold. The
skeletal density of the composite scaffold was calculated
using the densities of amorphous and crystalline PHBV
polymer and the density of HA. The porosity of a
scaffold is given by