Table 2.
Mean bone level for each study group and the bone level difference between respectively equicrestally versus subcrestally placed implants and implants with moderately rough versus minimally rough neck; p < 0.05 indicates a statistically significant difference (paired t-test).
| Bone Level | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Group 1: Equicrestal | Group 2: Subcrestal | Paired Difference | |||||||||
| Mean (SD) | Median | Min | Max | Mean (SD) | Median | Min | Max | Mean dif | 95% CI | p | |
| Baseline | 0.03 (0.09) | 0.00 | 0.00 | 0.40 | 0.00 (0.00) | 0.00 | 0.00 | 0.00 | 0.030 | (−0.009,0.070) | 0.123 |
| 6 months | 0.72 (0.74) | 0.59 | 0.00 | 2.45 | 0.04 (0.11) | 0.00 | 0.00 | 0.45 | 0.678 | (0.360,0.996) | <0.001 |
| 12 months | 0.78 (0.81) | 0.54 | 0.00 | 2.92 | 0.03 (0.10) | 0.00 | 0.00 | 0.36 | 0.746 | (0.397,1.096) | <0.001 |
| 24 months | 0.69 (0.70) | 0.51 | 0.00 | 2.61 | 0.04 (0.10) | 0.00 | 0.00 | 0.30 | 0.644 | (0.337,0.951) | <0.001 |
| 36 months | 0.59 (0.59) | 0.44 | 0.00 | 2.25 | 0.04 (0.10) | 0.00 | 0.00 | 0.36 | 0.549 | (0.297,0.802) | <0.001 |
| Group 3: Moderately Rough Neck | Group 4: Minimally Rough Neck | Paired Difference | |||||||||
| Mean (SD) | Median | Min | Max | Mean (SD) | Median | Min | Max | Mean dif | 95% CI | p | |
| Baseline | 0.01 (0.07) | 0.00 | 0.00 | 0.30 | 0.02 (0.05) | 0.00 | 0.00 | 0.22 | −0.002 | (−0.424,0.037) | 0.902 |
| 6 months | 0.33 (0.64) | 0.00 | 0.00 | 2.74 | 0.27 (0.38) | 0.18 | 0.00 | 1.60 | 0.064 | (−0.118,0.245) | 0.474 |
| 12 months | 0.34 (0.68) | 0.00 | 0.00 | 2.62 | 0.34 (0.53) | 0.00 | 0.00 | 1.61 | 0.009 | (−0.191,0.209) | 0.926 |
| 24 months | 0.36 (0.58) | 0.00 | 0.00 | 1.75 | 0.37 (0.49) | 0.23 | 0.00 | 1.60 | −0.014 | (−0.170,0.142) | 0.853 |
| 36 months | 0.51 (0.74) | 0.22 | 0.00 | 2.84 | 0.45 (0.58) | 0.26 | 0.00 | 1.95 | 0.066 | (−0.114,0.246) | 0.453 |