Total knee replacement (TKR) stands undisputed as a highly transformative procedure for alleviating pain and reversing functional limitations. Yet, despite decades of iterative updates in metallurgy and mechanical designs, patient satisfaction metrics have hit a classic 80% plateau. Early mechanical failure modes heavily driven by aseptic loosening, malalignment, and dynamic instability continue to persist. Up to 40% of these premature drop-outs can be directly linked to suboptimal component fixation or improper ligament balancing at the time of surgery.
Currently, achieving ligament alignment remains more of an art form than a quantitative science, depending almost entirely on a surgeon’s subjective tactile feedback. Compounding this limitation is a total lack of long-term in vivo kinetic force data from inside the active joint, which severely limits a team’s ability to correlate brief on-table alignment checks with true post-operative everyday load distribution.
