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. 2017 Jul 15;26(5):1577–1585. doi: 10.1007/s00167-017-4640-5

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — a Mean tibiofemoral contact force (lbs) during a normal flexion arc (degrees) with no external stress applied. CR-TKA (clear circle left), ERF-TKA (crossed circle middle), IRF-TKA (solid circle right) n = 8. b Mean tibiofemoral contact force (lbs) at maximal internal rotation stress with knee flexion (degrees). CR-TKA (clear circle left), ERF-TKA (crossed circle middle), IRF-TKA (solid circle right) n = 8. c Mean tibiofemoral contact force (lbs) at maximal external rotation stress with knee flexion (degrees). CR-TKA (clear circle left), ERF-TKA (crossed circle middle), IRF-TKA (solid circle right) n = 8. d Mean tibiofemoral contact force (lbs) at maximal valgus stress with knee flexion (degrees). CR-TKA (clear circle left), ERF-TKA (crossed circle middle), IRF-TKA (solid circle right) n = 8. e Mean tibiofemoral contact force (lbs) at maximal varus stress with knee flexion (degrees). CR-TKA (clear circle left), ERF-TKA (crossed circle middle), IRF-TKA (solid circle right) n = 8