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Table 4 Time-related differences in the levels of bacteria with respect to surface type

From: Orthodontic bonding procedures significantly influence biofilm composition

 Day 1 (T1)Day 4 (T2)Significance†P value for interaction
TreatmentTime
Streptococcus mutans (Log10/cm2)
 BIa4.29 ± 0.225.22 ± 0.53AD < BI = ETT1< T20.388
 ETb4.47 ± 0.365.31 ± 0.39
 PRc4.05 ± 0.445.01 ± 0.27
 ADd3.96 ± 0.374.49 ± 0.59
Porphyromonas gingivalis (Log10/cm2)
 BIa3.23 ± 0.312.82 ± 0.30AD < BI = ET
PR < ET
T1 > T20.905
 ETb3.48 ± 0.403.14 ± 0.44
 PRc2.80 ± 0.282.52 ± 0.53
 ADd2.57 ± 0.172.36 ± 0.63
Total bacteria (Log10/cm2)
 BIa7.06 ± 0.347.99 ± 0.24AD = PR < BI = ETT1 < T20.104
 ETb7.25 ± 0.368.11 ± 0.33
 PRc6.90 ± 0.487.70 ± 0.24
 ADd6.87 ± 0.267.34 ± 0.42
  1. Two-way ANOVA was used to determine significant differences between the two time points using the Bonferroni correction at a significant level of α < 0.05
  2. aUntreated bovine incisor
  3. bEtched bovine incisor
  4. cPrimed bovine incisor
  5. dTransbond XT adhesive
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