MARGINAL BONE LOSS,BIOLOGICAL WIDTH AND GEOMETRIC SHAPE OF THE ABUTMENT:7-YEAR FOLLOW-UP OF AN ABUTMENT CALLED Trumpet R

Background. Marginal bone resorption observed around osseointegrated implants after the first year is particularly dangerous, especially if the implants are sandblasted and etched. In this case, this MBL can open the way to bacteria that, by colonizing the implant surface, can trigger peri-implantitis and the loss of the implants and the prosthesis screwed onto them. The aim of this work was to evaluate the MBL around implants inserted with a mathematical protocol and prostheticized with a one-time abutment called Trumpet. Materials and Methods: 10 patients were considered who needed an all-on-six rehabilitation (5) and single rehabilitations (5). Measurements of the soft tissue thickness and the distance between the crest and the implant neck (CI) were performed at the time of surgery and at a distance of 1.3 and 7 years. Results: Clinical and radiographic controls performed at a distance of 1.3 and 7 years of the treated patients showed the same CI distance (Crest-Implant) in all patients without observing marginal bone loss. Conclusions: The use of a mathematical model that takes into account the soft tissue thickness for the positioning of the implant with respect to the bone crest and the use of abutments that give more space to the soft tissues to respect the biological width seems to be the correct way to avoid the loss of marginal bone around the implants.