TABLE 1.
Patient and intervention characteristics of the two study groups in a comparison of antibiotic prophylaxis (n = 238) with a placebo (n = 235) before implant surgery
| Variable | Group | |
|---|---|---|
| Placebo | Antibiotics | |
| Gender | ||
| Male | 118 (50.2%) | 121 (50.6%) |
| Female | 117 (49.8%) | 118 (49.4%) |
| Age (mean years ± SD) | 57.1 ± 13.7 | 57.7 ± 14.2 |
| Smoking | ||
| Yes | 40 (17.0%) | 46 (19.2%) |
| No | 170 (72.3%) | 165 (69.0%) |
| Unknown | 26 (11.0%) | 28 (11.7%) |
| Jaw receiving implants | ||
| Mandible | 82 (34.9%) | 94 (39.3%) |
| Maxilla | 141 (60.0%) | 131 (54.8%) |
| Both | 12 (5.1%) | 12 (5.0%) |
| Implant system | ||
| Straumann | 141 (60.0%) | 140 (58.6%) |
| stra | 76 (32.3%) | 64 (26.8%) |
| Nobel | 18 (7.7%) | 31 (13.0%) |
| Southern | 0 (0.0%) | 3 (1.3%) |
| Surgical protocol | ||
| One stage | 184 (78.3%) | 189 (79.1%) |
| Two stage | 49 (20.9%) | 49 (20.5%) |
| Both | 2 (0.9%) | 1 (0.4%) |
| Sinus lift surgery | 10 (4.3%) | 11 (4.6%) |
| Bone augmentation | 43 (18.3%) | 35 (14.7%) |
| Implant placement and GBR surgery | 15 (6.4%) | 14 (5.9%) |
| Duration of intervention (mean minutes ± SD) | 32.6 ± 18.8 | 31.3 ± 14.6 |
| Number of implants/patient | ||
| 1 | 140 (59.6%) | 144 (60.3%) |
| 2–3 | 82 (34.9%) | 78 (32.6%) |
| 4–6 | 13 (5.5%) | 17 (7.1%) |
| Total number of implants | 373 | 384 |
| Chlorhexidine rinse | ||
| Never | 4 (1.7%) | 3 (1.3%) |
| Before surgery | 2 (0.9%) | 1 (0.4%) |
| After surgery | 76 (32.3%) | 79 (33.1%) |
| Before and after surgery | 152 (64.7%) | 156 (65.3%) |