Project work: Finite element analysis of tibial plate osteosynthesis

This repository contains the Blender file for the tibia plate and images of the project

Osteosynthesis is an operation in orthopedics where internal fixator are surgically implanted for the purpose of repairing a broken bone. The broken bone is fixated and can grow back together stabily in the correct position. Common materials for the internal fixator include stainless steel, titanium alloy, and cobalt-chrome alloy. Here we apply the finite element method (FEM) to compare von Mises stress on a tibial plate made of the first two mentioned materials.

0. Starting point: 3D mesh of the tibia

1. Creating a 3D model of a tibial plate in Blender

Medial (up) and frontolateral (below) view.

2. Implementation of forces in Ansys:

i) Definition of force application surfaces, and

ii) lines of force action with x,y,z components

for

• Body force acting from femur on tibia
• hamstrings
• patellar tendon
• anterior cruciate ligament (ACL)
• posterior cruciate ligament (PCL)

3. FEM analysis for material comparison in Ansys: von Mises stress on tibial plate and screws made of either titanium alloy or stainless steel