Individual stents were prepared to standardize the location of periodontal probe in order to evaluate the following parameters at four sites of the experimental dental implants at baseline, 3, 7, 14, 21 days follow-ups: 1) plaque index (PI/%): dichotomous plaque index along the mucosal margin around implants, 2) Bleeding on probing (BOP,%):dichotomous index of bleeding during probing around implants, 3) Position of the peri-implant margin (PPM/mm): distance from the stent to the peri-implant margin; 4) Relative clinical attachment level (RCAL/mm): distance from the stent to the bottom of the peri-implant pocket; and 5) Peri-implant Probing depth (PD,mm): calculated by deducting PPM from RCAL.