Evaluation of micro gap size and microbial microleakage at the implant fixture- abutment interface in original and compatible abutments

Abstract

Introduction: Microgap between implant and abutment can lead to frequent mechanical and biological problems such as abutment screw breakage or peri-implantitis. In Korean implants, different systems are compatible with each other due to the similar geometry of the abutment connection area. Due to the high cost of the implant and the limited access to parts, if the results of using compatible abutments are acceptable, compatible abutments can be used instead of the original, saving costs and allowing dentists access to different abutments. will be more Considering that these systems are commonly used instead of each other, the purpose of this study was to compare bacterial microleakage and microgap in the Korean Osstem, Dio and Cis systems, whose regular abutment is compatible with each other. Method: In this study, out of 12 implant abutments, including four Osstem system abutments (Osstem implant Seoul, South Korea) (length = 7; diameter = 4.5, gh = 3 mm), 4 system abutment (Dio implant, Seoul, South Korea (length = 7; diameter = 4.5, gh = 3 mm) and 4 system abutments (medimecca, Seoul, South Korea) Cis (length = 7; diameter = 4.5, gh = 3 mm) were used and all these abutments were connected to Osstem fixtures (regular size, diameter 4.5 and length 11.5 mm) ), whose inner surface was contaminated with bacterial suspension. Bacterial contamination was measured at 5, 24, and 48 hours. Microgap size was measured at four points by electron microscope. One-way analysis of variance, Kruskal-Wallis test and SPSS version 25 software were used to compare microgap and miroleakage between the studied groups. Results: the mean microgap in the Dio group was higher than the mean in the other two groups. There was no significant difference between the mean microgap in Osstem group and Cis group. In the present study, there was no statistically significant difference between the mean number of colonies (CFU) in the groups under investigation at any of the four evaluation times. Conclusion: The results of the present study showed that the microgap in the Dio group was higher than the other two groups, and the microgap in the Osstem group was similar to that of the Cis group. In the present study, there was no difference in the number of colonies (CFU) in the groups under investigation at any of the four evaluation times.