In vitro microtomography evaluation of the implant-abutment interface - Gap microtomography evaluation/ Avaliação da microtomografia in vitro da interface implante-pilar - Avaliação da microtomografia de Gap

Thamiris Nogueira Sacker, Micheline Sandini Trentin, Thais Maria Pires dos Santos, Ricardo Tadeu Lopes, Elken Gomes Rivaldo


Objectives: To evaluate in vitro the micromorphological differences of the prosthetic implant-abutment interface in two screw implant systems and a friction one.Materials and methods: Two screw implants (Group 1- Crossfit Internal Connection, Group 2- Tapered Internal Connection), a compressed friction implant (Group 3 - Frictional Connection), and their corresponding prosthetic components were used. The implants were individually fixed in an acrylic resin cylinder and the abutments were positioned with the torque recommended by the manufacturer and taken into a SkyScan 1173 microtomograph. In each implant-abutment image, the regions of interest evaluated were cervical area, abutment area, screw area, and abutment and screw area (G1-G2). In group 3, the cervical and abutment areas were measured. Statistical analysis was performed with ANOVA, Robust ANOVA, and Post Hoc Tukey’s test.Results: In the cervical region, only the samples from group 2 presented maladaptation (12.5 ± 7.0 µm). In the abutment area, the samples from groups 1 (159.6 ± 6.2 µm) and 2 (149.9 ± 9.1 µm) were statistically similar. In the screw area and the abutment and screw area, group 1 had a larger contact surface compared to group 2 but they were statistically similar.Conclusion: The samples from groups 1 and 3 did not present micro-spaces in the cervical third. Nevertheless, the samples from group 2 presented a mismatch in this region but within the acceptable limits found in the literature.


dental implants, dental abutments, dental internal adaptation, X-ray microtomography.

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