Table 3 Median (minimum and maximum) values of antibacterial efficacy of plasma treatment on S. mutans biofilm in terms of metabolic activity.

From: Antibacterial efficacy of non-thermal atmospheric plasma against Streptococcus mutans biofilm grown on the surfaces of restorative resin composites

Groups

Time

p-value

Baseline

2 min

4 min

6 min

Control

1.58 (− 0.15 a 2.92)

1.23 (− 0.18 a 3.61)

1.15 (− 0.09 a 4.38)

1.41 (− 0.46 a 4.28)

C

Plasma 30”

1.13 (0.07 a 6.47)

0.94 (− 0.03 a 4.69)

1.44 (− 0.05 a 3.51)

1.37 (− 0.24 a 5.24)

C

Plasma 90”

 − 0.39 (− 0.72 a 0.11)

 − 0.41 (− 0.78 a 0.51)

0.19 (− 0.78 a 0.39)

 − 0.02 (− 0.84 a 0.67)

A

Plasma 120”

 − 0.38 (− 0.57 a 0.08)

 − 0.36 (− 0.65 a 0.11)

 − 0.35 (− 0.58a − 0.04)

0.35 (− 0.65 a 0.26)

A

Plasma 150”

 − 0.31 (− 0.80 a 0.43)

 − 0.32 (− 0.68 a 0.31)

 − 0.23 (− 0.68 a 0.11)

 − 0.21 (− 0.68 a 0.55)

B

Argon gas

0.87 (− 0.07 a 6.04)

0.70 (− 0.31 a 5.85)

0.83 (− 0.22 a 5.32)

0.49 (− 0.22 a 3.35)

a

Chlorhexidine

 − 0.83 (− 0.95 a − 0.54)

 − 0.72 (− 0.95 a − 0.56)

 − 0.66 (− 0.96 a − 0.46)

 − 0.69 (− 0.94 a − 0.20)

*

  1. Groups having similar letters are not significantly differences (p > 0.05), *Indicates significantly differences with all the groups, aIndicates differences with P90, P120 and P150 groups.
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