Subject specific finite element modeling of periprosthetic femoral fracture using element deactivation to simulate bone failure.
Subject-specific finite element (FE) modeling methodology could predict peri-prosthetic femoral fracture (PFF) for cementless hip arthoplasty in the early postoperative period. This study develops methodology for subject-specific finite element modeling by using the element deactivation technique to simulate bone failure and validate with experimental testing, thereby predicting peri-prosthetic femoral fracture in the early postoperative period. Material assignments for biphasic and triphasic models were undertaken. Failure modeling with the element deactivation feature available in ABAQUS 6.9 was used to simulate a crack initiation and propagation in the bony tissue based upon a threshold of fracture strain. The crack mode for the biphasic models was very similar to the experimental testing crack mode, with a similar shape and path of the crack. The fracture load is sensitive to the friction coefficient at the implant-bony interface. The development of a novel technique to simulate bone failure by element deactivation of subject-specific finite element models could aid prediction of fracture load in addition to fracture risk characterization for PFF.
Biomedical Engineering, AMME, University of Sydney, Sydney, NSW 2006, Australia.
Brad
B
Miles
Biomedical Engineering, AMME, University of Sydney, Sydney, NSW 2006, Australia. Electronic address: Elizabeth.Kolos@hotmail.com.
Elizabeth
E
Kolos
Specialist Orthopedic Group, Wollstonecraft, NSW 2065, Australia.
William L
WL
Walter
The Australian School of Advanced Medicine, Macquarie University, NSW 2109, Australia.
Richard
R
Appleyard
Biomedical Engineering, AMME, University of Sydney, Sydney, NSW 2006, Australia.
Angela
A
Shi
Biomedical Engineering, AMME, University of Sydney, Sydney, NSW 2006, Australia.
Qing
Q
Li
Biomedical Engineering, AMME, University of Sydney, Sydney, NSW 2006, Australia.
Andrew J
AJ
Ruys
D003198:Computer Simulation; D005264:Femoral Fractures / Q000503:physiopathology; D005269:Femur / Q000503:physiopathology; D020342:Finite Element Analysis; D017276:Friction; D006622:Hip Prosthesis; D006801:Humans; D008954:Models, Biological; D057068:Periprosthetic Fractures / Q000503:physiopathology; D011475:Prosthesis Failure
Cementless implant; Cracking; Failure load; Periprosthetic femoral fractures; Strain; Subject-specific finite element modeling