Skip to main content

Advertisement

Table 5 Comparison of microbial presence between the baseline and different phases of decontamination

From: In vitro evaluation of microbial contamination and the disinfecting efficacy of chlorhexidine on orthodontic brackets

Groups Time Absent, n (%) Present, n (%) P value
Group 1^ Baseline 17 (56.7) 13 (43.3) 0.02*
Phase I 10 (76.9) 3 (23.1)
Phase II 3 (100.0) 0
Group 2# Baseline 23 (76.7) 7 (23.3) 0.05*
Phase I 7 (100.0) 0
Group 3^ Baseline 13 (43.3) 17 (56.7) 0.01*
Phase I 16 (94.1) 1 (5.9)
Phase II 1 (100.0) 0
Group 4^ Baseline 6 (20.0) 24 (80.0) 0.002*
Phase I 18 (75.0) 6 (25.0)
Phase II 6 (100.0) 0
  1. Group 1, American Orthodontics brackets; Group 2, 3M Unitek; Group 3, Ortho Organizers; Group 4, China Dental Orthodontic Brackets; Group 5, Negative control; Group 6, Positive control
  2. *Statistically significant, ^Cochran’s Q test, #McNemar’s test