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- Bressan, E., et al.
(författare)
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Experimental and computational investigation of Morse taper conometric system reliability for the definition of fixed connections between dental implants and prostheses
- 2014
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Ingår i: Proceedings of the Institution of Mechanical Engineers Part H-Journal of Engineering in Medicine. - : SAGE Publications. - 0954-4119 .- 2041-3033. ; 228:7, s. 674-681
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Tidskriftsartikel (refereegranskat)abstract
- Nowadays, dental implantology is a reliable technique for treatment of partially and completely edentulous patients. The achievement of stable dentition is ensured by implant-supported fixed dental prostheses. Morse taper conometric system may provide fixed retention between implants and dental prostheses. The aim of this study was to investigate retentive performance and mechanical strength of a Morse taper conometric system used as implant-supported fixed dental prostheses retention. Experimental and finite element investigations were performed. Experimental tests were achieved on a specific abutment-coping system, accounting for both cemented and non-cemented situations. The results from the experimental activities were processed to identify the mechanical behavior of the coping-abutment interface. Finally, the achieved information was applied to develop reliable finite element models of different abutment-coping systems. The analyses were developed accounting for different geometrical conformations of the abutment-coping system, such as different taper angle. The results showed that activation process, occurred through a suitable insertion force, could provide retentive performances equal to a cemented system without compromising the mechanical functionality of the system. These findings suggest that Morse taper conometrical system can provide a fixed connection between implants and dental prostheses if proper insertion force is applied. Activation process does not compromise the mechanical functionality of the system.
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| 2. |
- Khodaei, Hamid, 1982, et al.
(författare)
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Simulation of active skeletal muscle tissue with a transversely isotropic viscohyperelastic continuum material model
- 2013
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Ingår i: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. - : SAGE Publications. - 2041-3033 .- 0954-4119. ; 227:5, s. 571-580
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Tidskriftsartikel (refereegranskat)abstract
- Human body models with biofidelic kinematics in vehicle pre-crash and crash simulations require a constitutive model of muscle tissue with both passive and active properties. Therefore, a transversely isotropic viscohyperelastic continuum material model with element-local fiber definition and activation capability is suggested for use with explicit finite element codes. Simulations of experiments with New Zealand rabbit's tibialis anterior muscle at three different strain rates were performed. Three different active force-length relations were used, where a robust performance of the material model was observed. The results were compared with the experimental data and the simulation results from a previous study, where the muscle tissue was modeled with a combination of discrete and continuum elements. The proposed material model compared favorably, and integrating the active properties of the muscle into a continuum material model opens for applications with complex muscle geometries.
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