Table 1.
Baseline characteristics of the patients in the CHX chip and the CHX gel group, respectively.
| Patient Characteristics | CHX Chip | CHX Gel | p |
| Patients | 17 | 15 | |
| Gender (m/f) | 9/8 | 7/8 | 1 1 |
| Age (year) | 60.0 | 57.5 | 0.5 2 |
| Smokers (n) | 1 | 3 | 0.3 1 |
| Implant position ul/ua/ll/la (n) | 5/7/7/1 | 8/3/5/0 | 0.341 3 |
| Implant loading time (year) | 5.6 ± 1.6 | 5.5 ± 1.8 | 0.67 4 |
| Total number of implants Per patient (mean ± std %) |
2.7 ± 2.0 | 2.8 ± 2.1 | 0.83 2 |
| Clinical parameters | |||
| BOP (mean ± std %) | 84 ± 15 | 63 ± 18 | 0.003 2 |
| PDD (mean ± std mm) | 3.9 ± 0.5 | 3.7 ± 0.6 | 0.1 2 |
| PI (mean ± std %) | 42.2 ± 37 | 45.6 ± 34 | 0.8 2 |
| Laboratory parameters | |||
| TBL (means ± std) | 24.7 ± 11 | 23.9 ± 14.2 | 1.0 2 |
| aMMP8 (means ± std) | 21.8 ± 21.5 | 17.3 ± 10.1 | 0.5 2 |
CC—CHX Chip group, GC—CHX Gel group, ul—upper laterals, ua—upper anteriors, ll—lower laterals, la—lower anteriors. 1 Fisher’s exact test; 2 Kruskal–Wallis test; 3 Pearson’s chi square test; 4 Mann–Whitney-Test; bold p-values indicate a statistically significant difference between the groups; BOP—bleeding on probing, PPD—peri-implant probing depth, PI—plaque index, TBL—total bacterial load, aMMP-8—activated matrix metalloproteinase 8.