Evaluation of bacterial colonization of the implant-abutment interface in implants with internal connection: pilot study

Abstract

Background: the implant-abutment interface leads to the formation of a space whose size varies according to different variables such as machining tolerances, micro-movements, the type of fabrication of prosthetic devices and the fabrication material. This space in close proximity to the peri-implant tissues is an opportunity for the colonization of microorganism bidirectionally, eventually triggering tissue response. Objective: to compare the filtration of Echerichia coli (E. coli) in the interface of implants of internal connection with prefabricated and customized abutments. Materials and methods: nine implants (Osseotite® Tapered Certain®, 3i Biomet) were divided into three groups based on the type of abutment used. Group 1 prefabricated abutment Provide®, Group 2 customized abutment Encode® Titanium, Group 3 customized abutment Encode® Zirconia. The implants were connected to the abutments and cycled according to ISO 14801:2007 norm (250,000 cycles) in a dynamic loading device. They were immersed in brain heart infusion (BHI) medium inoculated with E. coli. Samples were taken and the turbidity of the medium was measured. An ANOVA test was performed to compare the size of the implant-abutment interface. Results: All samples were found to be colonized in different proportions. Conclusions: All samples showed E. coli colonization.

Keywords

• Carga bacteriana
• implantes dentales
• interfase implante-pilar
• titanio
• microbiología: CAD/CAM