Table 1.
Description and comparison of demographic and clinical variables.
| Test Group (Conical Connection) n = 15 (50.0%) |
Control Group (Hexagonal Connection) n = 15 (50.0%) |
p-Value * | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Age (mean (min, max)) (years) | 45 (21, 71) | ||||||||
| 43 (22, 60) | 46 (21, 71) | 0.589 | |||||||
| Gender (n (% within the group)) | 0.713 | ||||||||
| Female | 8 (53.3) | 9 (60.0) | |||||||
| Male | 7 (46.7) | 6 (40.0) | |||||||
| Smoking (n (%)) | 0.624 | ||||||||
| No | 13 (86.7) | 12 (80.0) | |||||||
| Low (<5 cigarettes/day) | 2 (13.3) | 3 (20.0) | |||||||
| Alcohol (n (%)) | 1.000 | ||||||||
| No | 14 (93.3) | 14 (93.3) | |||||||
| Low (<10 g/day) | 1 (6.7) | 1 (6.7) | |||||||
| Mesiodistal distance (mean (SD)) (mm) | 10.00 (3.30) | 10.07 (1.49) | 0.832 | ||||||
| Occlusal height (mean (SD)) (mm) | 8.60 (1.35) | 7.07 (1.87) | 0.023 | ||||||
| Buccolingual width (mean (SD)) (mm) | |||||||||
| Before flap raising | 7.47 (1.41) | 8.00 (2.45) | 0.933 | ||||||
| After flap raising | 7.13 (1.51) | 7.53 (1.92) | 0.898 | ||||||
| Implant diameter (n (%)) | 0.666 | ||||||||
| 3.5 mm | 4 (26.7) | 3 (20.0) | |||||||
| 4.0 mm | 11 (73.3) | 12 (80.0) | |||||||
| Implant length (n (%)) | 0.464 | ||||||||
| 10.0 mm | 6 (40.0) | 8 (53.3) | |||||||
| 11.5 mm | 9 (60.0) | 7 (46.7) | |||||||
| Buccal bone to implant (mean (SD)) (mm) | 1.57 (0.86) | 1.53 (0.83) | 1.000 | ||||||
| Tissue thickness (mean (SD)) (mm) | |||||||||
| Implant placement | 1.93 (0.59) | 2.70 (1.31) | 0.077 | ||||||
| Impressions | 2.50 (0.76) | 2.62 (1.04) | 0.758 | ||||||
| Prosthesis delivery | 2.43 (0.76) | 2.92 (1.24) | 0.338 | ||||||
| Width of the keratinized tissue (mean (SD)) (mm) | |||||||||
| Implant placement | 3.27 (1.16) | 2.93 (1.34) | 0.541 | ||||||
| Prosthesis delivery | 2.71 (0.83) | 2.42 (1.00) | 0.442 | ||||||
| 1 week | 2.67 (0.65) | 2.14 (0.38) | 0.073 | ||||||
| 1 month | 2.54 (0.66) | 2.13 (0.35) | 0.125 | ||||||
| 3 months | 2.42 (0.79) | 2.33 (0.82) | 1.000 | ||||||
| 6 months | 2.42 (0.51) | 2.17 (0.75) | 0.522 | ||||||
| 12 months | 2.23 (0.73) | 2.44 (0.73) | 0.488 | ||||||
| Papilla index (% within a visit) (mesial) ** | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| Prosthesis delivery | 14.3 | 64.3 | 21.4 | 0.0 | 8.3 | 33.3 | 50.0 | 8.3 | 0.248 |
| 1 week | 0.0 | 8.3 | 91.7 | 0.0 | 0.0 | 0.0 | 71.4 | 28.6 | 0.121 |
| 1 month | 0.0 | 7.7 | 53.8 | 38.5 | 0.0 | 0.0 | 37.5 | 62.5 | 0.474 |
| 3 months | 0.0 | 8.3 | 75.0 | 16.7 | 0.0 | 16.7 | 16.7 | 66.7 | 0.058 |
| 6 months | 0.0 | 8.3 | 58.3 | 33.3 | 0.0 | 0.0 | 83.3 | 83.3 | 0.131 |
| 12 months | 0.0 | 7.7 | 38.5 | 53.8 | 0.0 | 0.0 | 33.3 | 66.7 | 0.645 |
| Papilla index (% within a visit) (distal) ** | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | |
| Prosthesis delivery | 14.3 | 64.3 | 21.4 | 0.0 | 8.3 | 25.0 | 66.7 | 0.0 | 0.064 |
| 1 week | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 71.4 | 28.6 | 0.050 |
| 1 month | 0.0 | 7.6 | 46.2 | 46.2 | 0.0 | 0.0 | 62.5 | 37.5 | 0.621 |
| 3 months | 0.0 | 16.7 | 66.7 | 16.7 | 0.0 | 16.7 | 33.3 | 50.0 | 0.301 |
| 6 months | 0.0 | 8.3 | 50.0 | 41.7 | 0.0 | 0.0 | 33.3 | 66.7 | 0.535 |
| 12 months | 0.0 | 15.4 | 30.8 | 53.8 | 0.0 | 11.1 | 55.6 | 33.3 | 0.506 |
Note: * p-value: independent samples Mann–Whitney U test for continuous variables and chi-squared test for categorical variables; ** there were no cases with the papilla index higher than 3.