Category | Risk factors | Patient in total (N) | Implants (N) | Failure (N) | Failure rate |
---|---|---|---|---|---|
A | Systemic disease | 9 | 34 | 10 | 0.29 |
B | Oral hygiene | 13 | 41 | 22 | 0.54 |
C | Irradiated flap | 15 | 53 | 17 | 0.32 |
A + B |  | 2 | 6 | 5 | 0.83 |
B + C |  | 6 | 21 | 12 | 0.57 |
A + C |  | 2 | 6 | 3 | 0.50 |
A + B + C |  | 1 | 2 | 2 | 1.00 |