Table 6.
Mean crestal bone loss (distal) one year after placement by study variables
| Study variables (pts = number of patients, n = number of implants)a | Mean crestal bone loss distally (SD) mm | Unadjusted β (95% CI) p valueb | Adjusted β (95% CI) p valuec |
|---|---|---|---|
| Gender | |||
| Male (pts = 152, n = 610) | 0.93 (0.85) | Ref | Ref |
| Female (pts = 302, n = 1063) | 0.82 (0.75) | − 0.11 (− 0.23, − 0.00) | − 0.08 (− 0.18, 0.01) |
| p = 0.048 | p = 0.094 | ||
| Age | |||
| 20–40 (pts = 124, n = 332) | 0.74 (0.85) | Ref | Ref |
| 41–60 (pts = 198, n = 751) | 0.80 (0.77) | 0.08 (− 0.06, 0.21) | − 0.10 (− 0.20, 0.01) |
| > 60 (pts = 132, n = 590) | 0.99 (0.75) | 0.26 (0.18, 0.40) | − 0.09 (− 0.21, 0.03) |
| p < 0.001 | p = 0.168 | ||
| Case type | |||
| Single crown (n = 780) | 0.36 (0.54) | Ref | Ref |
| FDP group (n = 893) | 1.29 (0.71) | 0.93 (0.87, 1.00) | 0.94 (0.87, 1.01) |
| p < 0.001 | p < 0.001 | ||
| Medical condition | |||
| No (pts = 291, n = 1031) | 0.78 (0.77) | Ref | Ref |
| Yes (pts = 163, n = 642) | 0.98 (0.80) | 0.18 (0.07, 0.29) | 0.08 (− 0.01, 0.17) |
| p = 0.002 | p = 0.071 | ||
| Smoking | |||
| No (pts = 396, n = 1482) | 0.87 (0.78) | Ref | Ref |
| Yes (pts = 58, n = 191) | 0.78 (0.87) | − 0.03 (− 0.19, 0.14) | − 0.08 (− 0.22, 0.06) |
| p = 0.728 | p = 0.290 | ||
| Implant abutment connection | |||
| Screw (n = 1607) | 0.86 (0.80) | Ref | Ref |
| Cement (n = 66) | 0.77 (0.56) | − 0.03 (− 0.24, 0.18) | 0.05 (− 0.23, 0.12) |
| p = 0.761 | p = 0.542 | ||
| Implant position (sextant) | |||
| UR posterior (n = 347) | 0.91 (0.84) | Ref | Ref |
| Upper anterior (n = 176) | 0.87 (0.67) | − 0.08 (− 0.22, 0.05) | − 0.16 (− 0.28, − 0.05) |
| UL posterior (n = 277) | 0.83 (0.78) | − 0.07 (− 0.19, 0.04) | − 0.03 (− 0.12, 0.07) |
| LL posterior (n = 389) | 0.82 (0.83) | − 0.06 (− 0.17, 0.05) | − 0.06 (− 0.15, 0.03) |
| Lower anterior (n = 92) | 1.25 (0.80) | 0.22 (0.04, 0.39) | 0.05 (− 0.10, 0.20) |
| LR posterior (n = 392) | 0.76 (0.73) | − 0.14 (− 0.24, 0.03) | − 0.06 (− 0.15, 0.03) |
| p = 0.002 | p = 0.065 | ||
| Implant manufacturer | |||
| Ankylos (n = 1125) | 0.67 (0.51) | Ref | Ref |
| Astra (n = 51) | 0.88 (0.80) | − 0.15 (− 0.40, 0.09) | − 0.16 (− 0.36, 0.04) |
| Xive (n = 485) | 0.86 (0.79) | 0.08 (− 0.04, 0.19) | 0.06 (− 0.03, 0.15) |
| Frialit (n = 12) | 0.83 (0.83) | − 0.10 (− 0.57, 0.38) | − 0.06 (− 0.44, 0.33) |
| p = 0.256 | p = 0.159 | ||
| Operator | |||
| Maxillofacial (pts = 217, n = 854) | 0.89 (0.78) | Ref | Ref |
| Restorative (pts = 237, n = 819) | 0.82 (0.80) | − 0.02 (− 0.09, 0.13) | 0.11 (0.02, 0.19) |
| p = 0.729 | p = 0.017 | ||
aNumber of patients (pts) is only presented for patient level variables
bEstimates and confidence intervals derived from mixed linear regression models, implants clustered within patients
cEstimates and confidence intervals derived from mixed linear regression models, implants clustered within patients, adjusted for all other factors in the table