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. 2021 Aug 26;8:721379. doi: 10.3389/fsurg.2021.721379

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Copyright © 2021 Kostretzis, Roby, Martinov, Kiss, Barry and Vendittoli.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Pre-revision long leg standing X-Ray reveals a right implant mDFA of 4° valgus and an mPTA of 1.5° valgus (5.5° valgus aHKA). On the intact left side, the mDFA is 2.0° valgus and mPTA 0.5° varus (aHKA of 1.5° valgus). (B) Right knee lateral view where the implant tibial slope is 1.5° anterior. (C) Left knee lateral view where the native tibial slope is 8.0° posterior. (D) Right knee skyline view showing a subluxed and worn patella.