Bacterial Leakage in Morse Cone Internal Connection Implants Using Different Torque Values

Abstract

The aim of this study was to assess whether there was a decrease of bacterial leakage with increasing torque values in conical Morse Cone connection implants. A total of 30 Morse Cone conical tapered implants (10 implants per group) were used in this study. The abutments were connected to the implants with 20 N (group 1), 30 N (group 2), and 40 N (group 3) insertion torque values. The inner parts of 5 implants, per group, were inoculated with Pseudomonas aeruginosa suspension and the remaining 5 implants, per group, with Aggregatibacter actinomycetemcomitans. The penetration of bacteria into the surrounding solution was determined by the observation of turbidity of the broth. In groups 1 and 2, bacterial contamination was found in 2 of the 10 implants, only in the specimens seeded with P. aeruginosa. In group 3, no contaminated samples were found. This study demonstrated that with increased insertion torque values in Morse Cone connection, the bacterial leakage is reduced.