Table 1: Descriptive statistics of the number of CFU of various bacteria in biofilm from twin block appliance at baseline (T0), one month (T1), three months (T2) and six months (T3) after placement of the appliances and P values based on freidmann's non-parametric test.
Organism | Timeline | N | Mean | Std. deviation | P-value |
Proteus | T0 | 1 | 0.0952 | 0.4364 | 0.085 |
T1 | 2 | 2.85 | 11.09 | ||
T2 | 6 | 23.333 | 50.30 | ||
T3 | 6 | 13.169 | 30.19 | ||
Klebsiella pneumonia | T0 | 2 | 5.71 | 22.03 | 0.260 |
T1 | 5 | 15.28 | 65.28 | ||
T2 | 6 | 3.04 | 5.39 | ||
T3 | 7 | 5.62 | 10.32 | ||
E. coli | T0 | 2 | 0.047 | 0.21 | 0.016* |
T1 | 6 | 7.57 | 1866 | ||
T2 | 8 | 2.38 | 10.91 | ||
T3 | 6 | 22.38 | 52.91 | ||
Other streptococcus | T0 | 14 | 24.38 | 30.01 | 0.001* |
T1 | 19 | 54 | 55.01 | ||
T2 | 22 | 124.52 | 106.29 | ||
T3 | 20 | 110.06 | 79.29 | ||
S. mitis | T0 | 6 | 3.14 | 5.91 | 0.015* |
T1 | 7 | 7.95 | 18.91 | ||
T2 | 13 | 21.09 | 28.90 | ||
T3 | 12 | 20 | 23.02 | ||
S. mutans | T0 | 0 | 0 | 0 | 0.001* |
T1 | 3 | 0 | 0 | ||
T2 | 6 | 11.66 | 24.66 | ||
T3 | 6 | 24.76 | 48.64 | ||
P. gingivalis | T0 | 2 | 0.19 | 0.60 | 0.662 |
T1 | 4 | 0.95 | 3.12 | ||
T2 | 1 | 0.24 | 1.09 | ||
T3 | 2 | 0.28 | 0.90 | ||
Actinomyces | T0 | 7 | 7.28 | 14.48 | 0.001* |
T1 | 9 | 10.47 | 21.50 | ||
T2 | 13 | 29.66 | 44.34 | ||
T3 | 16 | 65.14 | 83.54 | ||
Lactobacilli | T0 | 0 | 0 | 0 | 0.123 |
T1 | 7 | 0.52 | 2.40 | ||
T2 | 4 | 11.95 | 29.87 | ||
T3 | 4 | 11.04 | 23.68 | ||
Candida albicans | T0 | 0 | 0 | 0 | 0.004* |
T1 | 1 | 0.09 | 0.43 | ||
T2 | 3 | 1.85 | 6.59 | ||
T3 | 9 | 20.95 | 0.34 | ||
Prevotella intermedia | T1 | 2 | 0.28 | 0.95 | 0.135 |
Citrobacter | T3 | 2 | 2.38 | 10.91 | - |
E. faecalis | T2 | 1 | 4.76 | 21.82 | 0.655 |
T3 | 1 | 2.85 | 13.03 | ||
Staphylococcus aureus | T1 | 1 | 0.476 | - |
*Statistically significant with p < 0.05.