Table 1.
Antibacterial effect of EETC against plaque bacteria
| Compound | Concentration (μg/disk) | Size of clear zone (disk margin, mm) | ||||
|---|---|---|---|---|---|---|
| S. mutants | A. actinomycetemcomitans | 1DPB#1 | 1DPB#2 | 1DPB#3 | ||
| Control | −3 | - | - | - | - | - |
| Ampicillin | 10 | 15.5 ± 0.21b | - | 0.1 ± 0.11 | - | - |
| 2EETC | 5 | 3.8 ± 0.19b | 3.7 ± 0.03a | 3.2 ± 0.03a | 2.7 ± 0.09b | 3.9 ± 0.18b |
| 10 | 7.2 ± 0.07b | 7.5 ± 0.02b | 6.9 ± 0.04b | 5.3 ± 0.05b | 7.4 ± 0.06b | |
1DPB; dental plaque bacteria, 2EETC; ethanol extracts of Terminalia chebula, 3No inhibition
(a P < 0.05, b P < 0.01)