Resumo

BEJA, Gabriela Benedini Strini Portinari et al. Surface analysis of dental implants tested in torsion. RFO UPF [online]. 2014, vol.19, n.1, pp. 57-62. ISSN 1413-4012.

Objective: To evaluate the mechanical behavior of dental implants subjected to manual torsion in order to analyze the breaking point and determine the region more fragile and susceptible to deformation by means of scanning electron microscopy before and after completion of the torsion test. Materiais and method: It was selected four models of the brand Connection® implants (n = 5): Master Screw, Porous, Conect AR and Conect Conical. We used a digital torque wrench for applying torque and with a scanning electron microscope evaluated the implant surface before and after the torsion test. Results: The results were obtained by statistical analysis ANOVA (P < 0.05), followed by Tukey test (P < 0.05). After the twist was found that the four samples showed different implants averages for maximum strength, however, no statistically significant difference for the Master Screw, Porous and Conect AR implants (P > 0,05), only the implant Conect Conical statistically different (P < 0,05). As for the images obtained from the SEM analysis it was observed assembler fracture implants Master Screw e Porous, rupture of implants Conect AR and dusted the internal threads of the Connect Conical. Conclusion: The models of implants tested showed different behaviors when subjected to mechanical force application, with tapered presenting less resistance to the torsion test.

Palavras-chave : Torsion mechanical.; Scanning electron microscopy.; Dental implants..