Table 8.
Frequency of implant complications by study variables
| Study variables | No complication | Complication | Unadjusted odds ratio (95% CI) | Adjusted odds ratio (95% CI)* |
|---|---|---|---|---|
| Gender | ||||
| Male | 489 (80%) | 121 (20%) | Ref | Ref |
| Female | 900 (85%) | 163 (15%) | 0.83 (0.52, 1.31) | 0.65 (0.36, 1.18) |
| p = 0.411 | p = 0.159 | |||
| Age | ||||
| 20–40 | 277 (83%) | 55 (17%) | Ref | Ref |
| 41–60 | 620 (83%) | 131 (17%) | 1.10 (0.63, 1.94) | 0.93 (0.50, 1.73) |
| > 60 | 492 (83%) | 98 (17%) | 0.96 (0.52, 1.76) | 0.71 (0.34, 1.48) |
| p = 0.859 | P = 0.616 | |||
| Case type | ||||
| Single crown | 673 (86%) | 107 (14%) | Ref | Ref |
| FDP group | 716 (80%) | 177 (20%) | 1.48 (1.03, 2.14) | 1.74 (1.16, 2.61) |
| p = 0.036 | p = 0.008 | |||
| Medical condition | ||||
| No | 873 (85%) | 158 (15%) | Ref | Ref |
| Yes | 516 (80%) | 126 (20%) | 1.49 (0.95, 2.33) | 1.64 (0.96, 2.79) |
| p = 0.086 | p = 0.071 | |||
| Smoking | ||||
| No | 1222 (82%) | 260 (18%) | Ref | Ref |
| Yes | 167 (87%) | 24 (13%) | 0.68 (0.34, 1.39) | 0.58 (0.25, 1.38) |
| p = 0.293 | p = 0.220 | |||
| Implant abutment connection | ||||
| Screw | 1369 (85%) | 238 (15%) | Ref | Ref |
| Cement | 20 (30%) | 46 (70%) | 29.32 (12.56, 68.41) | 36.07 (14.59, 89.18) |
| p < 0.001 | p < 0.001 | |||
| Implant position (sextant) | ||||
| UR posterior | 292 (84%) | 55 (16%) | Ref | Ref |
| Upper anterior | 134 (76%) | 42 (24%) | 1.90 (1.04, 3.48) | 1.14 (0.59, 2.23) |
| UL posterior | 232 (84%) | 45 (16%) | 0.87 (0.52, 1.48) | 0.79 (0.45, 1.37) |
| LL posterior | 328 (84%) | 61 (16% | 1.16 (0.70, 1.91) | 1.14 (0.68, 1.93) |
| Lower anterior | 83 (90%) | 9 (10%) | 0.59 (0.23, 1.48) | 0.34 (0.12, 1.00) |
| LR posterior | 320 (82%) | 72 (18%) | 1.49 (0.92, 2.42) | 1.40 (0.84, 2.35) |
| p = 0.040 | p = 0.084 | |||
| Implant manufacturer | ||||
| Ankylos | 43 (84%) | 8 (16%) | Ref | Ref |
| Astra | 418 (86%) | 67 (14%) | 0.86 (0.31, 2.44) | 0.84 (0.26, 2.70) |
| Xive | 917 (82%) | 208 (18%) | 0.85 (0.53, 1.37) | 0.80 (0.46, 1.38) |
| Frialit | 11 (92%) | 1 (8%) | 0.60 (0.05, 7.04) | 0.23 (0.01, 5.21) |
| p = 0.893 | p = 0.695 | |||
| Operator | ||||
| Maxillofacial | 703 (82%) | 151 (18%) | Ref | Ref |
| Restorative | 686 (84%) | 133 (16%) | 1.03 (0.67, 1.61) | 1.39 (0.82, 2.35) |
| p = 0.883 | p = 0.216 | |||
*Estimates and confidence intervals derived from mixed logistic regression models, adjusted for clustering of implants within patients