t-test, Mann-Whitney U test EC and IC of marginal bone loss by characteristics of placed implants
| Variables | Subjects (N) | External MBL | Internal MBL | T value |
P-value | |
|---|---|---|---|---|---|---|
| Mean ± SD (mm) | Mean ± SD (mm) | |||||
| Fixture diameter (mm) | 4 | 26 | -0.183 ± 0.967 | -0.872 ± 0.931 | 55 |
0.9 |
| 4.5 | 9 | -0127 ± 1.000 | -0.749 ± 0.789 | 10 |
0.52 | |
| 5 | 49 | -0.205 ± 0.961 | -0.746 ± 0.742 | 360 |
0.061 | |
| 5.5 | 3 | 0.609 | -0.744 ± 0.771 | 2 |
1 | |
| Fixture length (mm) | 7 | 2 | -0.246 ± 0.774 | - | - | - |
| 8.5 | 12 | -0.190 ± 0.986 | -0.737 ± 1.229 | 15 |
0.364 | |
| 10 | 55 | -0.303 ± 1.115 | -0.605 ± 0.814 | 1.333 | 0.188 | |
| 11.5 | 15 | -0.154 ± 0.983 | -0.256 | 6 |
0.933 | |
| 13 | 3 | -0.346 | -1.234 ± 0.500 | 2 |
1 | |
| Prosthesis system | SCRP | 68 | -0.329 ± 0.736 | -0.742 ± 0.651 | 2.246 | 0.288 |
| Cemented | 19 | -0.142 ± 1.000 | -0.771 ± 0.819 | 52 |
0.545 | |
| Implant brand | Osstem | 33 | -0.177 ± 0.966 | -0.232 ± 0.024 | 28 |
0.852 |
| Straumann | 3 | - | -0.729 ± 0.823 | - | - | |
| 3I | 19 | -0.140 ± 0.991 | - | - | - | |
| MegaGen | 9 | -0.202 ± 0.969 | -0.203 ± 0.194 | 4 |
0.53 | |
| KIS | 23 | - | -0.735 ± 0.740 | - | - | |
| Emergence angle | Mesial and/or distal EA > 30 | 46 | -0.600 ± 0.736 | -1.076 ± 0.212 | -1.918 | 0.062 |
| Both EA 30 degrees or less | 41 | 0.126 ± 1.028 | -0.393 ± 0.497 | -1.846 | 0.072 | |
*: results by Mann-Whitney U test.
MBL, marginal bone loss; SD, standard deviation; SCRP, screw-cement retained prosthesis; EA, emergence angle.
