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The amount of dissolved collagen from demineralized dentin beams in 30-d aging (mean ± sd; n = 10). The Y-axis = the measured mass (μg) of dissolved hydroxyproline at 30 d/dentin dry mass (mg) at 0 d. Four mediums were tested in the 30-d incubation: Control medium, control medium + 0.2% CHX, control medium + 5% MDPB, control medium + 5% DMADDM. Values with dissimilar letters are significantly different from each other (p < 0.05).
