Improving the Fit of Implant Prosthetics: An In Vitro Study

Abstract

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Stress on external hexagon and Morse taper implants submitted to immediate loading

“…Conversely, the complete fit of superstructures on implants is not possible using conventional laboratory procedures. 4 Clinically, this passivity may also favor different techniques for infrastructure manufacture. However, the strategy used in the current study was essential to isolate factors and to determine the effect of the framework types and of the MT connection implant on the stress values, regardless of the infrastructure manufacturing process.…”

“…2,3 A deficient fit may induce tensile, compressive, and bending forces during the prosthesis attachment, which may result in further mechanical complications. 4 The relationship between passivity and suitable distribution of occlusal loads among implants, prosthetic components, and bone tissue is essential for the success of the implantsupported prostheses rehabilitation. [5][6][7] Rehabilitations in the complete dental arch offer the greatest risk since a larger number of implants and the curved shape of the infrastructure can induce higher values of misfit between implants and prosthetic components.…”

“…2,3,9 Many studies have been developed to investigate techniques employing welding to reinforce bars and the resulting passivity, and to determine where less stress may be induced on the bone tissue. 2,4 Another prosthetic alternative to immediate loading is the IOL DIEM system (3i Implant Innovation-USA). This system is a provisional rehabilitation treatment with an innovative absence of metallic infrastructure, 10 aiming to reduce the stress during the implant-healing phase.…”

The effect of repeated torque tightening on total lengths of implant abutments in different internal implant‒abutment connections

“…A misfit between implant and abutment will create tensile and compressive forces that will be exerted on the restoration, leading to prosthesis and abutment screw loosening, restoration fracture, bone microfractures around the implant and even the fracture of the implant body. 2,3 In addition, misfit is a suitable place for aggregation of microorganisms, leading to inflammation of soft tissues around the implant. Therefore, the connection between the suprastructure and implant platform or abutment is an important factor in the success of implant-supported prostheses.…”

Surface characteristics and castability of Zr-14Nb alloy dental castings

“…Metal-ceramic restorations remain the most widely used restorative concept because of their combined strength and aesthetics, especially in long-span implantsupported fixed prostheses. Originally based on precious metal alloys, metal-ceramic restorations were used lower cost base metal alloys such as titanium (Ti) alloys that possess excellent corrosion resistance and good physical properties 5) , and cobalt (Co) base alloys that show higher elastic modulus than noble metals [6][7][8][9] . However, such conventional alloys may inhibit the use of magnetic resonance imaging (MRI) diagnostics for head and neck disorders when they are placed in the mouth as implants or large units of dental restorations.…”