Table 2.
Total log colony forming units (CFU) (mean values and 95% confidence intervals in parentheses; N=9 per group) on the various surfaces at the given time points
| 20 min | 4 h | 8 h | 16.5 h | |
| Machined | 4.5 A | 3.9 A | 4.8 AB | 5.9 ABCD |
| Sa<0.2 µm | (4.3, 4.7) | (3.6, 4.2) | (4.6, 5.0) | (5.6, 6.3) |
| Stained | 4.3 A | 3.9 A | 4.6 A | 5.4 AB |
| (4.1, 4.5) | (3.7, 4.1) | (4.4, 4.7) | (5.2, 5.7) | |
| Machined Sa>0.2 µm | 4.5 A | 3.7 A | 4.9 AB | 5.9 ABCD |
| (4.4, 4.7) | (3.4, 4.0) | (4.6, 5.2) | (5.7, 6.2) | |
| Acid-etched | 4.5 A | 3.8 A | 4.9 AB | 5.7 BD |
| (4.4, 4.7) | (3.5, 4.2) | (4.7, 5.4) | (5.3, 6.2) | |
| Modified acid-etched | 4.5 A | 4.3 A | 5.4 | 6.5 CE |
| (4.3, 4.7) | (4.0, 4.5) | (5.3, 5.4) | (6.4, 6.6) | |
| SLA | 4.7 AB | 4.2 A | 5.6 C | 6.5 DE |
| (4.6, 4.8) | (3.9, 4.5) | (5.4, 5.8) | (6.3, 6.6) | |
| Modified SLA | 4.8 B | 4.8 B | 6.2 D | 6.9 E |
| (4.8, 4.9) | (4.7, 4.9) | (5.9, 6.5) | (6.7, 7.0) |
Different superscript letters represent significant differences (ANOVA and Scheffé post hoc analysis, read vertically). SLA: Sandblasted/acid-etched