Table 2.
Patient demographics
| Overall | Subgroup* | ||
|---|---|---|---|
| Platform switching | Platform matching | ||
| Patients, n (%) | 196 (100) | 144 | 41 |
| Sex, n (%) | |||
| Male | 87 (44.4) | 62 (43.1) | 19 (46.3) |
| Female | 109 (55.6) | 82 (56.9) | 22 (53.7) |
| Age, years | |||
| Mean (SD) | 51.5 (14.2) | 53.1 (14.4) | 47.4 (12.9) |
| Range | 17.9–82.1 | 17.9–82.1 | 19.3–78.5 |
| Pre-implant bone surgeries, n | |||
| Autogenous bone grafting | 31 | n/a | n/a |
| Socket preservation | 1 | n/a | n/a |
| Others | 16 | n/a | n/a |
| Pre-implant soft tissue surgeries, n | |||
| Palatal soft tissue graft | 15 | n/a | n/a |
| Other | 1 | n/a | n/a |
| Bone quality, % | |||
| D1: mainly homogenous bone | 12.8 | 8.9 | 22.4 |
| D2: compact bone thick | 42.2 | 42.4 | 41.8 |
| D3: compact thin/cancellous good density | 42.2 | 45.3 | 35.8 |
| D4: compact thin/cancellous low density | 2.8 | 3.4 | 0.0 |
| Reasons for tooth loss, n (%) | |||
| Caries | 53 (19.3) | 36 (18.4) | 13 (19.4) |
| Endodontic | 96 (35.0) | 67 (34.2) | 24 (35.8) |
| Fracture | 35 (12.8) | 32 (16.3) | 3 (4.5) |
| Periodontal | 46 (16.8) | 33 (16.8) | 13 (19.4) |
| Endodontic and periodontal | 3 (1.1) | 3 (1.5) | 0 (0.0) |
| Caries and periodontal | 4 (1.5) | 4 (2.0) | 0 (0.0) |
| Endodontic and fracture | 2 (0.7) | 1 (0.5) | 1 (1.5) |
| Others | 35 (12.8) | 20 (10.2) | 13 (19.4) |
| Missing | 11 (3.9) | ||
| Smoking status, n (%) | |||
| Non-smoker | 166 (86.5) | 121 (85.2) | 37 (90.2) |
| Mild smoker (≤ 10/day) | 18 (9.4) | 13 (9.2) | 4 (9.8) |
| Heavy smoker (> 10/day) | 8 (4.2) | 8 (5.6) | 0 (0.0) |
| General health status, n (%) | |||
| ASA P1 | 161 (85.6) | 118 (85.5) | 34 (82.9) |
| ASA P2 | 26 (13.8) | 20 (14.5) | 6 (14.6) |
| ASA P3 | 1 (0.5) | 0 (0.0) | 1 (2.4) |
*Eleven patients with 14 implants were not loaded/restored with abutments due to early implant failures or because the patients were lost to follow-up (Fig. 1)