Table 2.
Description and comparison of radiographical variables (in mm except for the crown-to-implant ratio).
| Test Group (Conical Connection) |
Control Group (Hexagonal Connection) |
p-Value * | |||
|---|---|---|---|---|---|
| Mean (SD) | Median | Mean (SD) | Median | ||
| Distance from the implant to the anterior tooth | 4.94 (1.55) | 5.47 | 4.22 (1.09) | 4.29 | 0.118 |
| Distance from the implant to the posterior tooth | 4.22 (1.51) | 3.99 | 3.98 (1.03) | 4.11 | 0.683 |
| Crown length | 10.84 (1.28) | 10.68 | 10.18 (2.39) | 9.53 | 0.085 |
| Crown-to-implant ratio | 1.00 (0.11) | 1.04 | 0.93 (0.19) | 0.92 | 0.131 |
| Implant MBL (mesial) | |||||
| Implant placement | 0.47 (0.30) | 0.45 | 0.45 (0.32) | 0.34 | 0.806 |
| Prosthesis delivery | −0.10 (0.09) | −0.11 | −0.21 (0.16) | −0.17 | 0.037 |
| 1 month | −0.20 (0.15) | −0.14 | −0.38 (0.21) | −0.39 | 0.141 |
| 3 months | −0.21 (0.13) | −0.19 | −0.48 (0.31) | −0.41 | 0.067 |
| 6 months | −0.24 (0.13) | −0.25 | −0.52 (0.31) | −0.49 | 0.078 |
| 12 months | −0.23 (0.15) | −0.24 | −0.60 (0.41) | −0.75 | 0.058 |
| Implant MBL (distal) | |||||
| Implant placement | 0.54 (0.40) | 0.43 | 0.44 (0.41) | 0.41 | 0.389 |
| Prosthesis delivery | −0.11 (0.10) | −0.10 | −0.13 (0.09) | −0.13 | 0.520 |
| 1 month | −0.21 (0.16) | −0.23 | −0.49 (0.31) | −0.39 | 0.099 |
| 3 months | −0.24 (0.15) | −0.23 | −0.56 (0.36) | −0.60 | 0.103 |
| 6 months | −0.28 (0.14) | −0.25 | −0.60 (0.43) | −0.62 | 0.256 |
| 12 months | −0.28 (0.15) | −0.29 | −0.79 (0.48) | −0.85 | 0.018 |
| Average implant MBL | |||||
| Implant placement | 0.51 (0.30) | 0.46 | 0.45 (0.34) | 0.40 | 0.461 |
| Prosthesis delivery | −0.11 (0.08) | −0.12 | −0.17 (0.12) | −0.17 | 0.176 |
| 1 month | −0.20 (0.14) | −0.18 | −0.43 (0.25) | −0.36 | 0.129 |
| 3 months | −0.22 (0.13) | −0.20 | −0.52 (0.30) | −0.53 | 0.032 |
| 6 months | −0.26 (0.13) | −0.25 | −0.56 (0.33) | −0.51 | 0.048 |
| 12 months | −0.25 (0.12) | −0.24 | −0.70 (0.43) | −0.80 | 0.033 |
| MBL change from implant placement to prosthesis delivery | |||||
| Mesial | −0.55 (0.34) | −0.56 | −0.73 (0.40) | −0.56 | 0.274 |
| Distal | −0.58 (0.28) | −0.48 | −0.65 (0.48) | −0.58 | 0.980 |
| Average | −0.56 (0.26) | −0.51 | −0.69 (0.42) | −0.62 | 0.520 |
| MBL change from prosthesis delivery to 12 months | |||||
| Mesial | −0.13 (0.17) | −0.14 | −0.43 (0.41) | −0.53 | 0.069 |
| Distal | −0.17 (0.17) | −0.14 | −0.68 (0.51) | −0.72 | 0.018 |
| Average | −0.15 (0.13) | −0.13 | −0.56 (0.44) | −0.64 | 0.023 |
Note: * p-value: independent samples Mann–Whitney U test.