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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: Dentistry (Sunnyvale). 2017 Feb 13;7(2):411. doi: 10.4172/2161-1122.1000411

Table 1.

Mean microhardness values of tooth chips expressed as ratios of (a) final vs. original microhardness and (b) final vs. post-demineralization microhardness.

Control (no disc) Control (no disc) Test (disc use) Test (disc use)
Mean Microhardness (MH) ratio (n=50): Mean Final/Original MH Mean Microhardness (MH) ratio (n=50): Mean Final/Demin MH Mean Microhardness (MH) ratio (n=50): Mean Final/Original MH Mean Microhardness (MH) ratio (n=50): Mean Final/Demin MH
1.04 (S.D.=0.16) 1.32 (S.D.=0.24) 1.08 (S.D.=0.13) 1.28 (S.D.=0.23)