Table 3.
Fraction Inhibitory Concentration Index (FICI) of the P. elliottii (PE) or the P. tropicalis (PT) resin in combination with chlorhexidine (CHD) against cariogenic bacteria.
| Bacterial strains | MIC PE | MIC CHD | FIC PE | FIC CHD | FICI | Interpretation | MIC PT | MIC CHD | FIC PT | FIC CHD | FICI | Interpretation |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Streptococcus mutans (ATCC 25175) | 12.5 | 0.46 | 50 | 0.46 | 5 | Antagonistic | 12.5 | 0.46 | 25 | 0.23 | 2.5 | Indifferent |
| Streptococcus mitis (ATCC 49456) | 25 | 1.84 | 50 | 3.68 | 4 | Indifferent | 25 | 1.84 | 25 | 1.84 | 2 | Indifferent |
| Streptococcus sanguinis (ATCC 10556) | 12.5 | 0.92 | 12.5 | 3.68 | 5 | Antagonistic | 25 | 0.92 | 25 | 0.92 | 2 | Indifferent |