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Table 2 PI scores for each treatment (mean ± SD; n = 21)

From: Alcohol-free essential oils containing mouthrinse efficacy on three-day supragingival plaque regrowth: a randomized crossover clinical trial

 

Treatment/groups

p valuea

Total differences

CHX

EO+

LZ

Saline

Overall

1.07 ± 0.20

1.65 ± 0.35

1.72 ± 0.36

2.31 ± 0.42

<0.0001

Vestibular + oral

1.07 ± 0.20

1.67 ± 0.35

1.73 ± 0.36

2.32 ± 0.42

< 0.0001

All vestibular

1.29 ± 0.35

1.99 ± 0.46

2.09 ± 0.43

2.85 ± 0.61

< 0.0001

Oral

0.85 ± 0.24

1.34 ± 0.31

1.37 ± 0.38

1.78 ± 0.36

< 0.0001

Upper arch

1.08 ± 0.28

1.64 ± 0.37

1.77 ± 0.41

2.47 ± 0.44

< 0.0001

Lower arch

1.05 ± 0.24

1.69 ± 0.44

1.69 ± 0.36

2.17 ± 0.46

< 0.0001

Molar

1.16 ± 0.29

2.18 ± 0.48

2.15 ± 0.43

2.54 ± 0.46

< 0.0001

Premolars

0.97 ± 0.26

1.54 ± 0.40

1.67 ± 0.49

2.24 ± 0.38

< 0.0001

Canines

1.05 ± 0.30

1.45 ± 0.43

1.57 ± 0.36

2.30 ± 0.53

< 0.0001

Incisors

1.07 ± 0.41

1.40 ± 0.39

1.47 ± 0.47

2.17 ± 0.56

0.0001

  1. aUsing Friedman test