Table 5 Mean crestal bone loss (mesial) one year after placement by study variables
Study variables (pts = number of patientsa, n = number of implants) | Mean crestal bone loss mesially (SD) mm | Unadjusted β (95% CI)b p value | Adjusted β (95% CI)c p value |
|---|---|---|---|
Gender | |||
 Male (pts = 152, n = 610) | 0.78 (0.73) | Ref | Ref |
 Female (pts = 302, n = 1063) | 0.72 (0.66) |  − 0.06 (− 0.17, 0.04) | 0.00 (− 0.09, 0.09) |
p = 0.233 | p = 0.963 | ||
Age | |||
 20–40 (pts = 124, n = 332) | 0.63 (0.72) | Ref | Ref |
 41–60 (pts = 198, n = 751) | 0.68 (0.64) | 0.06 (− 0.06, 0.18) |  − 0.10 (− 0.19, 0.00) |
  > 60 (pts = 132, n = 590) | 0.89 (0.70) | 0.26 (0.13, 0.39) |  − 0.04 (− 0.15, 0.07) |
p < 0.001 | p = 0.104 | ||
Case type | |||
 Single crown (n = 780) | 0.30 (0.43) | Ref | Ref |
 FDP group (n = 893) | 1.13 (0.63) | 0.86 (0.80, 0.92) | 0.86 (0.81, 0.92) |
p < 0.001 | p < 0.001 | ||
Medical condition | |||
 No (pts = 291, n = 1031) | 0.67 (0.66) | Ref | Ref |
 Yes (pts = 163, n = 642) | 0.86 (0.71) | 0.17 (0.07, 0.27) | 0.07 (− 0.01, 0.15) |
p = 0.001 | p = 0.080 | ||
Smoking | |||
 No (pts = 396, n = 1482) | 0.75 (0.67) | Ref | Ref |
 Yes (pts = 58, n = 191) | 0.68 (0.79) |  − 0.01 (− 0.16, 0.14) | 0.00 (− 0.13, 0.12) |
p = 0.905 | p = 0.988 | ||
Implant abutment connection | |||
 Screw (n = 1607) | 0.75 (0.69) | Ref | Ref |
 Cement (n = 66) | 0.56 (0.56) |  − 0.14 (− 0.33, 0.04) |  − 0.06 (− 0.21, 0.08) |
p = 0.128 | p = 0.394 | ||
Implant position (sextant) | |||
 UR posterior (n = 347) | 0.77 (0.73) | Ref | Ref |
 Upper anterior (n = 176) | 0.70 (0.60) |  − 0.10 (− 0.21, 0.02) |  − 0.15 (− 0.25, − 0.05) |
 UL posterior (n = 277) | 0.73 (0.69) |  − 0.01 (− 0.11, 0.09) | 0.03 (− 0.05, 0.11) |
 LL posterior (n = 389) | 0.72(0.70) |  − 0.08 (− 0.17, 0.01) |  − 0.01 (− 0.09, 0.06) |
 Lower anterior (n = 92) | 1.16 (0.68) | 0.28 (0.13, 0.42) | 0.12 (0.00, 0.25) |
 LR posterior (n = 392) | 0.67 (0.64) |  − 0.08 (− 0.17, 0.01) |  − 0.01 (− 0.09, 0.06) |
p < 0.001 | p = 0.002 | ||
Implant manufacturer | |||
 Ankylos (n = 1125) | 0.75 (0.69) | Ref | Ref |
 Astra (n = 51) | 0.46 (0.50) |  − 0.30 (− 0.51, − 0.08) |  − 0.30 (− 0.47, − 0.13) |
 Xive (n = 485) | 0.76 (0.69) | 0.07 (− 0.03, 0.17) | 0.04 (− 0.04, 0.12) |
 Frialit (n = 12) | 0.58 (0.63) |  − 0.26 (− 0.67, 0.15) |  − 0.23 (− 0.56, 0.09) |
p = 0.008 | p < 0.001 | ||
Operator | |||
 Maxillofacial (pts = 217, n = 854) | 0.78 (0.70) | Ref | Ref |
 Restorative (pts = 237, n = 819) | 0.70 (0.68) |  − 0.02 (− 0.12, 0.08) | 0.09 (0.02, 0.17) |
p = 0.666 | p = 0.018 | ||