Continuum Blue

Pelvis Bone & Acetabular Cup

Analysis Following Total Hip Arthroplasty

Client / Partner:
Orthopaedic companies

imulation of preoperative & postoperative (virtually implanted) pelvis bone to enable comparison of acetabular cup designs and position/orientation in the patient & assessment of bone remodelling.

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 Scope:  Change in stress/strain distribution in the bone following THA often results in bone one density loss and potential fracture of the bone. In this study several design scenarios were set up from an acetabular cup, femur head and a patient specific pelvis geometry (generated from a CT scan) using various cup materials, orientations and dimensional parameters. The data obtained under static load case was then compared to the preoperative state model to assess the influence of various design parameters on the bone in various regions of interest (as well as implant?).

 Input:  Patient Specific CT scan | Material properties & relationships (Discrete & Continuous, mapped) | Body weight | Hip contact & muscle forces over Gait cycle | Virtual segmentation parameters | Friction coefficients (Constant or time dependant)

 Outputs:  Change in bone density | Contact pressure | Micro-motion & hip implant loosening | Virtual segmentation of the bone (for comparison to published data) | Regions of bone gains & loss

 Physics: Solid/Structural Mechanics (Stress-Strain) | Bone remodelling |