Improve_Real-World_Performance_with_Structures_Simulation MODSIM 3DXCONFERENCE
I am pleased to invite you to Dr. LEE, Wu Chean's presentation on the Global 3DEXPERIENCE Modeling and Simulation Virtual Conference on November 17th & 18th.
Abstract
The advancement of computational and simulation technology has empowered the engineering community to enhance productivity and design innovation. However, the benefit of simulation technology has yet to be fully capitalised by medical practitioners for diagnosis, pre-surgery planning, post-surgery performance predictions and forensic investigation. This study indicates additional insight provided by simulation technology could help medical practitioners to make informed pre-surgery planning and implant selection.
The lesser trochanter (LT) fragment in the multifragmentary intertrochanteric femur fracture (AO 31A2.2) may extend distally. If the fragment extends too distally, fixation with a short proximal femoral nail antirotation (PFNA-II) device may not be sufficient. The exact length of distal extension that can be tolerated by the short PFNA-II is not known, therefore it is our objective to determine it.
A finite element modelling is developed using Simulia Abaqus, based on AO 31A2.2 fracture fixed with a 200mm length size 10 PFNA-II. The parametric study was performed to investigate the failure point of the implant with various sizes of LT fragment. The stiffness, maximum vertical reaction force, and the plastic deformation area were investigated. In both non-osteoporotic and osteoporotic models, the stiffness and the maximum vertical reaction force of the construct dropped significantly when the LT fragment is larger than 40mm. Beyond 40mm of LT fragment size, there was a rapid increase in the area of plastic deformation of the cortical bone distal to the intertrochanteric fracture, signifying structural failure of the construct. This means when fixing the multifragmentary intertrochanteric fracture of the femur with the PFNA-II device, a long nail should be considered if the lesser trochanter fragment extends 40mm distal to the distal base of the lesser trochanter.
Presentation Replay
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