Cell viability stratified by fluorescence measurement. Relative fluorescence unit data were as follows: DG, 289029; CG, 525902; and GG, 861622. High cell proliferation was observed in the GG. Statistically significant differences were observed among the groups (∗, p < .05; ∗∗, p < .003; ∗∗∗, p < .002; n = 3). Abbreviations: CG, atelocollagen medium group; DG, Dulbecco's modified Eagle's medium group; GG, gelatin medium group.