Table 5 Patient and treatment characteristics and survival
Variable | Category | Number of patients | Relative frequency of patients (%) | Number of anterior implants | Relative frequency of anterior implants (%) | 1-year survival (%) | 2-year survival (%) | 5-year survival (%) | 10-year survival (%) | 15-year survival (%) | 20-year survival (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
Age, baseline | ≤ 60 | 44 | 61.1 | 144 | 61.0 | 94.4 | 93.6 | 93.6 | 89.1 | 74.0 | 59.9 |
> 60 | 28 | 38.9 | 92 | 39.0 | 96.7 | 96.7 | 93.2 | 93.6 | 93.6 | 84.8 | |
Sex | Female | 35 | 48.6 | 117 | 49.6 | 96.5 | 96.5 | 93.5 | 90.3 | 88.9 | 74.7 |
Male | 37 | 51.4 | 119 | 50.4 | 94.1 | 93.2 | 93.2 | 90.6 | 73.9 | 63.3 | |
Smoking | No | 59 | 81.9 | 196 | 83.1 | 98.0 | 98.0 | 94.9 | 91.7 | 88.7 | 64.6 |
Yes | 13 | 18.1 | 40 | 16.9 | 87.5 | 87.5 | 87.5 | 87.5 | 87.5 | NA | |
Bruxism | No | 66 | 91.7 | 217 | 91.9 | 97.2 | 96.7 | 95.2 | 92.0 | 82.0 | 70.4 |
Yes | 6 | 8.3 | 19 | 8.1 | 73.7 | 73.7 | 73.7 | 73.7 | 73.7 | NA | |
Indication | First treatment | 61 | 84.7 | 203 | 86.4 | 95.6 | 95.0 | 95.0 | 93.9 | 84.3 | 70.0 |
Retreatment | 11 | 15.3 | 33 | 14.0 | 93.5 | 93.5 | 83.9 | 68.6 | NA | NA | |
Mandible | Teeth | 43 | 59.7 | 143 | 60.6 | 93.6 | 92.8 | 90.4 | 85.3 | 76.9 | 58.8 |
Prosthesis | 29 | 40.3 | 93 | 39.4 | 97.8 | 97.8 | 97.8 | 97.8 | 87.6 | 81.7 | |
Surgeon experience | < 5 years | 22 | 30.6 | 84 | 35.6 | 92.9 | 92.9 | 92.9 | 91.6 | 78.6 | 65.3 |
5–10 years | 19 | 26.4 | 76 | 32.2 | 100.0 | 100.0 | 95.5 | 92.4 | 89.3 | 89.3 | |
≥ 10 years | 31 | 43.0 | 76 | 32.2 | 93.4 | 92.1 | 92.1 | 86.9 | 83.7 | NA | |
Number of anterior implants | 2 (Z2A2) | 21 | 29.2 | 42 | 17.8 | 100.0 | 97.5 | 97.5 | 94.9 | NA | NA |
3 (Z2A3) | 10 | 13.9 | 30 | 12.7 | 90.0 | 90.0 | 90.0 | 90.0 | 84.7 | 84.7 | |
4 (Z2A4) | 41 | 56.9 | 164 | 69.5 | 95.0 | 95.0 | 93.0 | 89.6 | 79.8 | 64.7 | |
Type of prosthesis | Overdenture | 44 | 61.1 | 133 | 56.4 | 93.2 | 92.4 | 90.0 | 86.5 | 82.1 | 63.8 |
Fixed bridge | 28 | 38.9 | 103 | 43.6 | 98.0 | 98.0 | 98.0 | 95.7 | 82.2 | 82.2 |