title: Effect of Modularity on the Fatigue Performance of Tibial Tray Designs in TKA Prostheses.
abstract: Fatigue performance of tibial tray in total knee arthroplasty (TKA) is of critical importance in terms of longevity of the prosthesis. Standards have been proposed by American Society for Testing and Materials (ASTM) and International Organization for Standardization (ISO) to ensure its long-term structural integrity. The aim of the current study is to evaluate the effect of modularity in the tibial tray following the testing standards, using finite element analysis. Goodman and Sines criteria were used to compare the fatigue safety factor (FSF) of four modular designs versus the two conventional designs. Cruciate-retaining (CR) type modular tibial tray designs were better than posterior-stabilized (PS) type tibial tray designs. More cutouts in the tray and absence of keel were reasons for poor fatigue performance.
authors.affiliation: Department of Aerospace Engineering, IIT Bombay, 400076, India.
authors.forename: Ahilan Anantha
authors.initials: AA
authors.lastname: Krishnan
authors.affiliation: Biomedical Engineering and Technology (Incubation) Centre, IIT Bombay, 400076, India.
authors.forename: Rupesh
authors.initials: R
authors.lastname: Ghyar
authors.affiliation: Department of Mechanical Engineering, IIT Bombay, 400076, India.
authors.forename: Bhallamudi
authors.initials: B
authors.lastname: Ravi
mesh_terms: D019645:Arthroplasty, Replacement, Knee; D020342:Finite Element Analysis; D006801:Humans; D007720:Knee Prosthesis; D008422:Materials Testing; D011474:Prosthesis Design; D013977:Tibia