Effect of veneering material on the deformation suffered by implant-supported fixed prosthesis framework

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.

Stress distribution around dental implants, generated by six different ceramic materials for unitary restoration: An experimental photoelastic study

“…37 Factors such as implant macrogeometry, prosthesis de sign, material used, location and position of the implant as well as quantity and quality of the bone tissue directly influence the distribution of stress. [38][39][40] Strain around the implant depends on the implant-bone interface and is influenced by its biomechanical aspects, such as the modulus of elasticity of the bone, the percentage of bone-implant contact (BIC), the spatial location of BIC, bone density, the degree of bone-implant bonding, etc. 41 Thus, strain in the periimplant bone area is an important factor to be evaluated, as it results in bone stress.…”

Effect of Different Superstructure Materials on Peri-implant Clinical and Radiographic Parameters

“…Another critical factor for maintenance of durable successful implant-prosthetic system, among many other factors, is the pattern through which stress is distributed in the implant components (4) . The stress distribution relies on the fixtures and abutments design, superstructure material and design, the position and location of the implant fixture and quantity and quality of the supporting bony structure (5)(6)(7) .…”

Stress Distribution in Single Dental Implant System

“…The stress distribution, in turn, depends on the implant design; prosthesis design; implant and prosthesis materials; implant location and position; and bone quantity and quality. [2][3][4] The strain around the implant depends on the implant-bone interface and is influenced by its biomechanical behavior. 5 Thus, the strain of periimplant bone area is an important factor to be evaluated, because it results in bone stress.…”