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. 2021 Jul 20;8:697020. doi: 10.3389/fsurg.2021.697020

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Copyright © 2021 Vendittoli, Martinov and Blakeney.

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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An example of varus knee with mDFA 4° valgus, mPTA 8° varus and aHKA 4° varus. Following rKA principles, the mPTA is adjusted to 5°, consequently changing aHKA to 1° varus. Using a lateral pivot point (shown on the left), the intact (lateral) compartment is resurfaced to accommodate an implant thickness (10 mm), creating a tighter medial gap which might require a deep MCL release. The medial pivot (central image) would result in thicker bone resection of the intact compartment and enlarging the lateral gap. The right figure shows a balanced bone resection with a central pivot. It complexifies the decision-making and requires PSI or robotics.