Affiliations: [a] Aerospace Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India | [b] Biomedical Engineering Technology (Incubation) Centre, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India | [c] Mechanical Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
Correspondence:
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Corresponding author: Ahilan A. Krishnan, Aerospace Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai 400076 India. E-mail:ahilanav@gmail.com
Abstract: Four modular Total Knee Arthroplasty
(TKA) prosthesis designs (Cruciate Retaining, Anterior Slide, Tibial Post
and Double Cam) based on Indian anthropometric data is considered for linear
static Finite Element Analysis (FEA) in the study. von Mises stresses are
studied for all the components of four different designs at 0°,
15°, 30°, 60° and 90° flexion angles. Stress
distribution in the Polyethylene (PE) insert is of critical importance in
deciding the longevity of the prosthesis. Peak von Mises stresses in PE
insert are found to be 11.02 MPa, 32.13 MPa, 59.25 MPa and 23.78 MPa for
Cruciate Retaining, Anterior Slide, Tibial Post and Double Cam design
respectively. Results indicate yielding of PE insert in three designs
(Anterior Slide, Tibial Post and Double Cam) and the reasons being less
congruity and edge loading.
Keywords: Total knee arthroplasty, cruciate retaining, polyethylene
