Figure 21.
Osteoblast biocompatibility (proliferation behavior) with 0A, 50A, and 70A chitosan–cellulose hydrogel beads based on the MTT assay over 192 h. Each value is expressed as a percentage of the mean ± SD (n = 4). Statistical significance was defined as *P < 0.05, **P < 0.005, ***P < 0.001 compared to control sample (ANOVA test). A, Acetic acid; B, HCl; and C, H2SO4. 0 refers to 0% initial chitosan content, and 70 refers to 70% chitosan content in the composite. DMEM is Dulbecco’s modified Eagle’s medium, and FBS is fetal bovine serum.