Estudo comparativo entre duas técnicas de soldagem de barras pré-fabricadas em Ti (Ti-6Al-4V) com três diferentes configurações

Abstract

In the past few years, frameworks for multiple implants have been sectioned and welded for a passive fit. However, the welding process itself may lead to misalignments. The objective of this study was to evaluate the stress generated on splinted implants by three different designs of Ti (Ti-6Al-4V) prefabricated frameworks welded with two different techniques. Three frameworks were welded with Laser or TIG (tungsten inert gas) to implants 3, 4 and 5, forming (G3L, G3T), (G4L, G4T), and (G5L, G5T), groups. Stress was measured by quantitative photoelastic analysis. Results: There was higher concentration of stress with TIG in groups G5T and G5L, and with Laser in groups G3T and G3L (p <0.05). The statistical analysis used the Fisher Anova test. In G4T and G4L groups, no significant difference was observed (p> 0.05). On the second analysis, the stress of the implants on each framework was analyzed on implants 1 and 5, since they are present on the three frameworks. No significant differences were observed in the analysis of implant 1 (p> 0.05). On implant 5 of the Laser group, G3L was significantly different, with higher values than those of G4L and G5L. On implant 5 of the TIG group, only G5T was significantly different, with higher values than those of G3T and G4T. The statistical analysis used the Fisher Anova test and Tukey-S-B test. Conclusion: results were better for TIG on frameworks with fewer implants, and for Laser on frameworks with more implants.