Table 1. Baseline data and 8-years cumulative survival rate (CSR) of gender, age, bone graft, length of implant, position, jawbone and type of diameter in single-tooth Ankylos implants (n = 450).
| No. | 8 years CSR | P value* | ||
|---|---|---|---|---|
| Gender | Male | 251 (55.8) | 95.9% | .136 |
| Female | 199 (44.2) | 98.2% | ||
| Age | Young (15 - 39 years) | 94 (20.9) | 100% | .060 |
| Middle (40 - 65 years) | 278 (61.8) | 95.3% | ||
| Old (> 65 years) | 78 (17.3) | 98.7% | ||
| Length | 8 mm | 82 (18.2) | 95.1% | .591 |
| 9.5 mm | 150 (33.3) | 96.9% | ||
| 11 mm | 193 (42.9) | 97.4% | ||
| 14 mm | 25 (5.6) | 100% | ||
| Type of diameter | 3.5 mm | 200 (44.4) | 97.4% | .954 |
| 4.5 mm | 219 (48.7) | 96.7% | ||
| 5.5 mm | 31 (6.9) | 96.6% | ||
| Position | Anterior | 100 (22.2) | 97.0% | .230 |
| Premolar | 130 (28.9) | 99.2% | ||
| Molar | 220 (48.9) | 95.7% | ||
| Jawbone | Mandible | 197 (43.8) | 98.2% | .109 |
| Maxillary | 253 (56.2) | 95.9% | ||
| Bone graft | Yes | 123 (27.3) | 95.1% | .130 |
| No | 327 (72.7) | 97.6% | ||
| Loading periods, months | ≤ 2 years | 14 (3.1) | ||
| 2-3 years | 4 (0.9) | |||
| 3-4 years | 51 (11.3) | |||
| 4-5 years | 109 (24.2) | |||
| 5-6 years | 135 (30.0) | |||
| 6-7 years | 101 (22.4) | |||
| 7-8 years | 33 (7.3) | |||
| > 8 years | 3 (0.7) |
*Estimated Cumulative rate and P-value from Kaplan-Meier analysis with Log-Rank test.