Bacterial leakage in Morse Cone internal connection implants using different torque values: an in vitro study
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Simonetta DʼErcole1, Domenico Tripodi, Lorenzo Ravera
1*Research Fellow, Department of Experimental and Clinical Sciences, Dental School, University of Chieti-Pescara, Chieti, Italy. †Professor of Pediatric Dentistry, Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy. ‡Private Practice, Turin, Italy. §Research Fellow, Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy. ‖Professor of Oral Pathology, Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy. ¶Researcher, Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy.
Purpose:
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.
Methods:
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.
Results:
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.
Conclusion:
This study demonstrated that with increased insertion torque values in Morse Cone connection, the bacterial leakage is reduced.
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