Comparative study of bacterial microfiltration in the implant-abutment interface, with straight and conical internal connections, in vitro.

Objective: to determine the presence of marginal bacterial microfiltration in the IAI in different implant/abutment systems, in vitro.

Material And Methods: Fifty-six implants from seven different brand names, 4 with cone and 3 with straight connections were used, implant and abutment were connected using the Ncm tightening as indicated by each of the manufacturers and then were sealed. The samples were subjected occlusal load and thermal cycling, a first sample of each group was observed by micro CT and in a second sample (both samples randomly selected) length of connection was measured, while the rest of the samples were mounted on devices according to the bacterial microfiltration model with Porphyromonas gingivalis.