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• W2045821685 endingPage "1086" @default.
• W2045821685 startingPage "1079" @default.
• W2045821685 abstract "The study focused on the influence of the implant material stiffness on stress distribution and micromotion at the interface of bone defect implants. We hypothesized that a low-stiffness implant with a modulus closer to that of the surrounding trabecular bone would yield a more homogeneous stress distribution and less micromotion at the interface with the bony bed. To prove this hypothesis we generated a three-dimensional, non-linear, anisotropic finite element (FE) model. The FE model corresponded to a previously developed animal model in sheep. A prismatic implant filled a standardized defect in the load-bearing area of the trabecular bone beneath the tibial plateau. The interface was described by face-to-face contact elements, which allow press fits, friction, sliding, and gapping. We assumed a physiological load condition and calculated contact pressures, shear stresses, and shear movements at the interface for two implants of different stiffness (titanium: E=110GPa; composite: E=2.2GPa). The FE model showed that the stress distribution was more homogeneous for the low-stiffness implant. The maximum pressure for the composite implant (2.1 MPa) was lower than for the titanium implant (5.6 MPa). Contrary to our hypothesis, we found more micromotion for the composite (up to 6 microm) than for the titanium implant (up to 4.5 microm). However, for both implants peak stresses and micromotion were in a range that predicts adequate conditions for the osseointegration. This was confirmed by the histological results from the animal studies." @default.
• W2045821685 created "2016-06-24" @default.
• W2045821685 creator A5012079895 @default.
• W2045821685 creator A5032157450 @default.
• W2045821685 creator A5045847402 @default.
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• W2045821685 date "2003-08-01" @default.
• W2045821685 modified "2023-10-13" @default.
• W2045821685 title "Influence of the stiffness of bone defect implants on the mechanical conditions at the interface—a finite element analysis with contact" @default.
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• W2045821685 doi "https://doi.org/10.1016/s0021-9290(03)00114-3" @default.
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• W2045821685 hasPublicationYear "2003" @default.
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