Publikationsdatenbank

3-D Modeling of Stresses and Strains in Accessory Carpal Bone Under Maximum Compressive Loading (2023)

Art

Poster

Autoren

Reuter, Thomas

Gernhardt, Jennifer (WE 17)

Rutter, Christian

Lischer, C. J. (WE 17)

Kongress

COMSOL Conference 2023 Munich

München, 25. – 27.10.2023

Quelle

Sprache

Englisch

Verweise

URL (Volltext): https://www.comsol.com/paper/3-d-modeling-of-stresses-and-strains-in-accessory-carpal-bone-under-maximum-comp-123571

Kontakt

Pferdeklinik

Oertzenweg 19 b
14163 Berlin
+49 30 838 62299 / 62300
pferdeklinik@vetmed.fu-berlin.de

Abstract / Zusammenfassung

When treating fractures of the accessory carpal bones in horses, it is important to understand the forces that implants (screws and plates) must withstand. The etiology of the fracture is not fully understood, but their high incidence during exercise suggests a relation to biomechanical forces. Detailed descriptions of the intact and fractured accessory carpal bone's morphology and functional anatomy, which are crucial for stable fracture
fixation, are lacking. Therefore, the aim of this study is to create a 3D FEM model for simulating the optimal selection and placement of implants. The primary focus of this work is to create and validate the model through an FEM study in order to calculate the stresses and strains that occur in the accessory carpal bone under maximum compression (force-to-failure) at different Young's moduli (E = 4 GPa – 30 GPa). The maximum strength was performed on accessory carpal bones of horses (n = 8) by experimental compression tests. A 3D FEM model was then created in COMSOL® Multiphysics using the Nonlinear Structural Materials Module. The morphology of the bone was obtained from CT scans. Boundary conditions were derived from the experimental uniaxial compression test. The results from the compression tests revealed averaged force-to-failure values of Fmean = 11.46 +/- 2.49 kN. The calculated stresses ranged from σ = 500 – 3000 MPa, depending on the Young’s modulus used. The simulated deformations behavior matched those obtained from the experimental compression tests. Thus, the comparison of the simulated deformations with those from the experimental tests helped narrow down the Young’s modulus range (E = 4 GPa – 6 GPa). The simple 3D FEM model developed in this study can be used for initial investigations to understand the etiology of the fracture and for the selection and placement of implants for stable fracture fixation of the accessory carpal bone.