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. 2015 Apr 23;3:e868. doi: 10.7717/peerj.868

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© 2015 Jiao et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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Data are presented as the mean ± SD of three independent experiments performed in quintuplicates. (A) Effects of the extract of PMMA resin with or without NAC on the viability of HDPCs at day 3 and day 7. For each tested time period, values with different superscripts are significantly different from each other (One-way ANOVA, p < 0.05). (B) Effects of 0.54 mM NAC on the viability of HDPCs at day 3 and day 7. Values with different superscripts are significantly different from each other (One-way ANOVA, p < 0.05). NS, not significant between the control group and the experimental group. (C) Typical SEM pictures showing cell attachment and morphology on top of PMMA resins with or without NAC. The cells with round or collapsed appearances were observed in subgroups containing no or 0.15 wt.% NAC (arrows).