Table 3. Mechanical and biological complication rates according to gender, age, position in the jaw, placement location, duration of functional loading, clinical crown-to-implant length ratio (C/I ratio), crown height space (CHS), and use of a submerged (two-stage) placement procedure.
| Characteristic | Mechanical complication group | Mechanical success group | P | Biological complication group | Biological success group | P | |
|---|---|---|---|---|---|---|---|
| Gender | Male (n) | 12 | 27 | .024a* | 6 | 33 | .795* |
| Female (n) | 3 | 31 | 6 | 28 | |||
| Age (years) | 53.7 ± 9.3 | 55.2 ± 11.4 | .655† | 60.1 ± 12.8 | 53.9 ± 10.4 | .075† | |
| Position in the jaw | Maxilla (n) | 7 | 19 | .359* | 4 | 22 | .857* |
| Mandible (n) | 8 | 39 | 8 | 39 | |||
| Placement location‡ | First molar (n) | 9 | 38 | .495* | 7 | 40 | .276* |
| Second molar (n) | 5 | 12 | 5 | 12 | |||
| Functional duration (months) | 30.0 ± 8.3 | 31.6 ± 7.4 | .383† | 28.2 ± 6.3 | 32.0 ± 7.6 | .076† | |
| Clinical C/I ratio | 1.0 ± 0.2 | 1.0 ± 0.2 | .137† | 1.0 ± 0.2 | 1.3 ± 0.2 | .385† | |
| CHS (mm) | 10.4 ± 1.9 | 10.5 ± 1.7 | .197† | 10.2 ± 1.6 | 10.7 ± 1.7 | .375† | |
| Submerged procedure | 4 | 12 | .503* | 1 | 16 | .180* | |
Except where stated otherwise, the data are mean ± SD values.
* Fisher's exact and chi-square tests, † Student's t-test (two-tailed with independent samples), ‡ Premolars were excluded due to sample smallness, a Statistically significant difference (P < .05).