Table 4 Distribution of presence of keratinized/non-keratinized gingiva with regard to the region
| Region | Number of implants | NKM | KM |
|---|---|---|---|
| n (%) | n (%) | ||
| Posterior region maxilla | 373 | 134 (13.9) | 239 (24.7) |
| Anterior region maxilla | 176 | 54 (5.6) | 122 (12.6) |
| Posterior region mandible | 275 | 127 (13.1) | 148 (15) |
| Anterior region mandible | 143 | 43 (4.5) | 100 (10.3) |