From: In vitro evaluation of microbial contamination and the disinfecting efficacy of chlorhexidine on orthodontic brackets
Groups
Microbial contamination
P value
Absent, n (%)
Present, n (%)
Group 1
17 (56.7)
13 (43.3)
< 0.001*
Group 2
23 (76.7)
7 (23.3)
Group 3
Group 4
6 (20.0)
24 (80.0)
Group 5
10 (100.0)
0
Group 6