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Effects of alkyl chain length (CL) of quaternary ammonium methacrylates in composite on biofilms: (A) colony-forming units (CFU) of 2-day biofilms on composite; (B) lactic acid production (mean ± SD; n = 6). In each plot, values with dissimilar letters are significantly different (P < 0.05). Note the log scale for the y-axis (A). NACP, nanoparticles of amorphous calcium phosphate. (Adapted from Zhang, Cheng, et al. 2016, with permission.)
