Fig. 2

a Swelling properties and b porosity of hydrogels prepared of different groups (Group 1: GelMA; Group 2: GelMA/OSA; Group 3: GelMA/OSSA;Group 4: GelMA/OSA/PMB; Group 5: GelMA/OSSA/PMB). (n = 5) c The G′ and G′′ of hydrogels (n = 5). The degradation rate of hydrogels in PBS (d); 1% collagenase e; 0.1% collagenase f; g PMB release of GelMA/OSA/PMB at pH 5.5/7.4 (n = 5). h PMB release of GelMA/OSSA/PMB at pH 5.5/7.4 (n = 5). i Antibacterial activity of hydrogels and PMB. The data represent the mean ± SD (n = 5). The error line represents the standard deviation. ∗p < 0.05. Bar graphs represent mean + SD. *p < 0.05; **p < 0.01