Effect of veneering material on the deformation suffered by
implant-supported fixed prosthesis framework |
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Authors: | Ant?nio Francisco GRANDO Carlos Eduardo Edwards REZENDE Edson Ant?nio Capello SOUSA José Henrique RUBO |
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Institution: | 1. Department of Dentistry, University of Paraná, Cascavel, PR, Brazil.;2. Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.;3. Department of Mechanical Engineering, Bauru School of Engineering, Univ. Estadual Paulista - UNESP, Bauru, SP, Brazil. |
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Abstract: | Knowing how stresses are dissipated on the fixed implant-supported complex allows
adequate treatment planning and better choice of the materials used for prosthesis
fabrication.ObjectivesThe 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 MethodsTwo 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).ResultsThe results showed that both variables had influence on the studied factors
(deformation by compression and tension).ConclusionThe 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. |
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Keywords: | Dental implants Dental prosthesis design Dental veneers Implant-supported dental prosthesis |
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