By Amir Putra Bin Md Saad, Ardiyansyah Syahrom, Muhamad Noor Harun, Mohammed Rafiq Abdul Kadir
This booklet develops and analyses computational put on simulations of the whole ankle alternative for the stance part of gait cycle. The emphasis is wear the correct layout parameters. The e-book offers a version together with 3 elements; tibial, bearing and talar representing their physiological functions.
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Extra resources for Wear Prediction on Total Ankle Replacement: Effect of Design Parameters
Sample text
1 is more conveniently written by dividing both sides by the contact area A and by replacing K/H with K w : h ¼ Kw Á p Á s ð3:2Þ where h is the wear depth in m, Kw, is wear factor in m2/N, p is the contact pressure in Pa, and s is the sliding distance in m. The K w -value is given in m3/Nm or m2/N, sometimes in mm3/Nm. The K w -value just like the friction coefficient, depends on a lot of parameters and this factor is to be found experimentally [3]. Wear rates are determined by dividing the number of cycle of joint activities per year [4].
Foot Ankle Int 31(5):404–411 16. McIff TE, Saltzman C, Brown T (2011) Contact pressure and internal stresses in a mobile bearing total ankle replacement. In: 45th annual meeting of the orthopaedic Research Society, San Francisco, CA, pp 25–28 17. Lundberg A, Goldie I, Kalin BSG (1989) Kinematics of the ankle/foot complex—Part 1: Plantarflexion and dorsiflexion. Foot Ankle 9:194–200 18. Maxian TA, Brown TD, Pedersen DR, Callaghan JJ (1996) 3-Dimensional sliding/contact computational simulation of total hip wear.
04 [8]. 4 Apply Loads and Boundary Conditions The tibial component was fixed in the distal tibia bone and the talar component was fixed at the articulating surfaces of the talar bone. In this simulation, the load created was an axial (vertical) load using concentrated force applied to the tibial component. The boundary condition of internal/external rotation was applied to the tibial component whereas the anterior/posterior force and plantar/dorsiflexion were applied to the talar component. The variation of load and boundary conditions of the stance phase of ankle gait cycle applied was utilized by creating tabular amplitude.
