Table. 3.

Table. 3.

Changes of dental calculus index

Group Base 1 week After 2 weeks After 4 weeks After 8 weeks After 16 weeks
E Mean 0.0000 0.0000 0.0000 0.0056a 0.0722a** 0.2167a**
SD 0.0000 0.0000 0.0000 0.0304 0.0840 0.3191
P Mean 0.0000 0.0000 0.0722 0.1500ab** 0.1889ab** 0.3167ab**
SD 0.0000 0.0000 0.2175 0.2848 0.3087 0.4514
N Mean 0.0000 0.0000 0.0056 0.1556b** 0.2667b** 0.4833b**
SD 0.0000 0.0000 0.0304 0.2696 0.3518 0.4318
p-value - - 0.054 0.018 0.026 0.041

E: experimental group, P: positive control group, N: negative control group, SD: standard deviation.

p-value by one-way ANOVA, **p<0.01 by paired t-test between base and after, absame letter means no statistical difference by Scheffe test.

Int J Clin Prev Dent 2024;20:64-8 https://doi.org/10.15236/ijcpd.2024.20.2.64
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