Otro
Effect of veneering material on the deformation suffered by implant-supported fixed prosthesis framework
Registration in:
Journal of Applied Oral Science, v. 22, n. 3, p. 209-217, 2014.
1678-7757
10.1590/1678-775720130517
S1678-77572014000300209
S1678-77572014000300209.pdf
8934648262859482
8496757998082790
Author
Grando, Antônio Francisco
Rezende, Carlos Eduardo Edwards
Sousa, Edson Antonio Capello
Rubo, José Henrique
Abstract
The aim of this study was to evaluate the deformation suffered by cantilevered implant-supported fixed prostheses frameworks cast in silver-palladium alloy and coated with two occlusal veneering materials: acrylic resin or porcelain. Material and Methods: Two strain gauges were bonded to the inferior surface of the silver-palladium framework and two other were bonded to the occlusal surface of the prosthesis framework covered with ceramic and acrylic resin on each of its two halves. The framework was fixed to a metallic master model and a 35.2 N compression force was applied to the cantilever at 10, 15 and 20 mm from the most distal implant. The measurements of deformation by compression and tension were obtained. The statistical 2-way ANOVA test was used for individual analysis of the experiment variables and the Tukey test was used for the interrelation between all the variables (material and distance of force application). Results: The results showed that both variables had influence on the studied factors (deformation by compression and tension). Conclusion: The ceramic coating provided greater rigidity to the assembly and therefore less distortion compared with the uncoated framework and with the resin-coated framework. The cantilever arm length also influenced the prosthesis rigidity, causing higher deformation the farther the load was applied from the last implant.