Yield stress as a function of pore morphology for all compositions examined (PCLonly, HA15, HA30, Dual Gradient). Similar to the results for compressive modulus, small-pore scaffolds had higher yield stresses compared to all other groups, which were statistically similar (p < 0.05). Groups with the same letter are not statistically different (p > 0.05). n = 5 scaffolds for all groups.