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The effects of implant angles on the stability of sacroiliac joint fusion: a finite element study

Pijnenburg, L.G.T. (2024) The effects of implant angles on the stability of sacroiliac joint fusion: a finite element study.

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Abstract:This study investigates the impact of varying implant angles on the stability of the sacroiliac (SI) joint in lateral transiliac SI joint fusion using a Finite Element (FE) model of the pelvis. As a first step, FE simulations were executed that mimicked experimental SI-stability measurements under various conditions (i.e. varying implant configurations) as reported in literature. These analyses formed the basis to create a more anatomically realistic FE model of a patient. In this patient model, five clinically relevant implant configurations were selected with three implants: one parallel configuration, two in which only the middle implant is rotated and two in which all implants are rotated. Each configuration was arranged in a triangular pattern with consistent spacing between the implants at the SI joint gap. The configurations were chosen based on patient anatomy and surgical accessibility, and the motions at the SI joint were calculated under shear loading conditions. The results showed minimal differences in both displacement direction and magnitude across the different configurations. To gain a more comprehensive understanding, it is recommended to explore additional load cases and a broader range of implant angles.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:https://purl.utwente.nl/essays/103598
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