title: 3D reconstruction of bony elements of the knee joint and finite element analysis of total knee prosthesis obtained from the reconstructed model.
abstract: Two separate themes are presented in this paper.
  
  
  OBJECTIVE
  The first theme is to present a graphical modeling approach of human anatomical structures namely, the femur and the tibia. The second theme involves making a finite element analysis of stresses, displacements and deformations in prosthetic implants (the femoral implant and the polyethylene insert).
  
  
  OBJECTIVE
  The graphical modeling approach comes in two parts. The first is the segmentation of MRI scanned images, retrieved in DICOM format for edge detection. In the second part, 3D-CAD models are generated from the results of the segmentation stage. The finite element analysis is done by first extracting the prosthetic implants from the reconstructed 3D-CAD model, then do a finite element analysis of these implants under objectively determined conditions such as; forces, allowed displacements, the materials composing implant, and the coefficient of friction.
  
  
  CONCLUSIONS
  The objective of this work is to implement an interface for exchanging data between 2D MRI images obtained from a medical diagnosis of a patient and the 3D-CAD model used in various applications, such as; the extraction of the implants, stress analysis at the knee joint and can serve as an aid to surgery, also predict the behavior of the prosthetic implants vis-a-vis the forces acting on the knee joints.
authors.affiliation: Mechanical Systems Laboratory, Military Polytechnic School, Bordj-El-Bahri Algiers, BP 17, Algeria.
authors.forename: Farid
authors.initials: F
authors.lastname: Djoudi
keywords: 3D-CAD model; Finite element analysis (FEA); MRI segmentation; Polyethylene insert (PE insert); Total knee prosthesis (TPK)