Table 1.

Summarize the clinical and radiological parameters with the selected scoring system.

Clinical/Radiological Parameters	Scoring system
Plaque index	the modified Mombelli plaque index [31]: (i) Grade 0: no plaque detected by inspection and probing. (ii) Grade 1: accumulation of plaque that is visible only by probing the sulcus with a probe but not with the eye. (iii) Grade 2: visible plaque deposition. Grade 3: massive plaque deposition.
Probing depth	measured using the Click-Probe (Kerr Corporation, Orange, CA, USA) The measurement takes place in four sites around the implant - mesial, vestibular, distal and oral. The maximum measurements in mm were recorded.
Bleeding on probing	The bleeding index is determined parallel to the probing depths. If bleeding occurs during probing, this is indicated in the patient's sheet with a plus sign [+]
Mobility grade/Osseointegration	Periotest® device (Gulden, Modautal, Germany) The manufacturer specifies a scale from -08 to +50. The smaller the measured value is, the better the osseointegration is assessed: (i) Values from -08 to 00: good osseointegration of the implant (ii) Values +01 to +09: A clinical review is needed to investigate osseointegration (iii) Values from +10 to +50: Insufficient osseointegration of the implant
Vertical bone loss	the difference in alveolar bone height between panoramic X-rays taken immediately after implantation and at the follow-up examination in millimeters