| Patients, | Short implant, n | Standard length implant and maxillary sinus floor augmentation, n | p* value |
---|---|---|---|---|
Biological complications | 11 | 0 | 11 | 0.00 |
 Intraoperative bleeding | 1 | 0 | 1 | 0.46 |
 Perforation of the Schneiderian membrane | 3 | 0 | 3 | 0.09 |
 Pain and swelling | 4 | 0 | 4 | 0.04 |
 Extensive cicatricial soft tissue | 1 | 0 | 1 | 0.46 |
 Infection | 1 | 0 | 1 | 0.46 |
 Permanent neurosensory disturbance | 1 | 0 | 1 | 0.46 |
Mechanical complications | 8 | 2 | 6 | 0.13 |
 Abutment screw loosening | 4 | 1 | 3 | 0.34 |
 Loss of abutment | 1 | 0 | 1 | 0.49 |
 Loosening of suprastructure | 1 | 0 | 1 | 0.49 |
 Chipping of ceramics | 2 | 1 | 1 | 1.00 |