TABLE 1.
Baseline characteristics of included patients/implants
| Characteristics | Control | Test |
|---|---|---|
| Number of patients | 32 | 30 |
| Age (years; mean (SD)) | 53.5 (11.2) | 60.0 (10.4) |
| Gender; M(male), F(female) | M 12, F 20 | M 15, F 15 |
| Smoking; n patients (%) | ||
| Never smoking or quit smoking >1 year ago | 19 (59.4) | 22 (73.3) |
| Quit smoking ≤1 year ago | 3 (9.4) | 1 (3.3) |
| Current smoking | 10 (31.3) | 7 (23.3) |
| Daily alcohol consumption; n patients (%) | 18 (56.3) | 15 (50.0) |
| Daily medication intake; n patients (%) | 15 (46.9) | 14 (46.7) |
| If yes, number of medications daily (mean (SD)) | 1.9 (1.1) | 1.8 (0.7) |
| Diabetes; n patients (%) | 2 (6.3) | 1 (3.3) |
| Periodontal classification; n patients (%) | ||
| Localized, stage I, grade A | 4 (12.5) | 1 (3.3) |
| Localized, stage II, grade A | 0 | 1 (3.3) |
| Generalized, stage I, grade A | 1 (3.1) | 0 |
| Generalized, stage II, grade A | 8 (25.0) | 10 (33.3) |
| Generalized, stage II, grade B | 5 (15.6) | 3 (10.0) |
| Generalized, stage III, grade B | 9 (28.1) | 9 (30.0) |
| Generalized, stage III, grade C | 2 (6.3) | 2 (6.7) |
| Generalized, stage IV, grade C | 3 (9.4) | 4 (13.3) |
| All implants | ||
| Total number of implants (range) | 75 (1–5) | 93 (1–10) |
| Clinical diagnosis; n implants (%) | ||
| Health (no BoP or suppuration) | 0 (0) | 4 (4.3) |
| Peri‐implant mucositis (BoP/suppuration, but no bone loss) | 4 (5.3) | 10 (10.8) |
| Peri‐implantitis | ||
| Excluded because placed in iliac crest bone | 0 (0) | 3 (3.2) |
| Explantation only possible treatment option | 3 (4.0) | 1 (1.1) |
| Implants allocated to treatment | 68 (90.7) | 75 (80.6) |
| Allocated implants | ||
| Implant function time (years; mean (SD)) | 8.9 (5.9) | 8.0 (4.3) |
| Range | 3.0–27.9 | 2.6–20.9 |
| Implant brand; n implants (%) | ||
| Alpha‐Bio Tec | 6 (8.8) | 0 (0) |
| Camlog | 1 (1.5) | 3 (4.0) |
| Dentium | 2 (2.9) | 0 (0) |
| Dentsply Sirona | 20 (29.4) | 24 (32.0) |
| MIS | 4 (5.9) | 0 (0) |
| Neobiotech | 0 (0) | 3 (4.0) |
| Nobel Biocare | 16 (23.5) | 24 (32.0) |
| Straumann | 14 (20.6) | 13 (17.3) |
| Zimmer Biomet | 5 (7.4) | 7 (9.3) |
| Type of restoration; n implants involved (%) | ||
| Single crown | 42 (61.8) | 39 (52.0) |
| Implant supported fixed partial denture | 22 (32.4) | 32 (42.7) |
| Implant‐teeth supported fixed partial denture | 0 (0) | 4 (5.3) |
| Overdenture | 4 (5.9) | 0 (0) |
| Screw‐ or cement‐retained restoration; n implants involved (%) | ||
| Screw‐retained | 18 (26.5) | 20 (26.7) |
| Cement‐retained | 50 (73.5) | 55 (73.3) |
| Implants placed in maxilla or mandible; n implants (%) | ||
| Maxilla | 45 (66.2) | 37 (49.3) |
| Mandible | 23 (33.8) | 38 (50.7) |
| Implants partially placed in augmented bone/bone substitute; n implants (%) | ||
| Yes | 17 (25.0) | 21 (28.0) |
| No | 43 (63.2) | 38 (50.7) |
| Unknown | 8 (11.8) | 16 (21.3) |