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• W3000908766 abstract "Purpose To assess the role of anatomic reconstruction of the posterolateral corner (PLC) of the knee arthroscopically in cadaveric knees with simulated isolated grade III posterolateral instability. Methods A total of 12 nonpaired, fresh-frozen cadaveric knees were biomechanically subjected to a 10-Nm varus moment, 5-Nm external and internal rotation torques, and 134-N posterior tibial load at 0°, 15°, 30°, 60°, and 90° of knee flexion (0° for varus loading only). Testing was performed with an intact and sectioned PLC and after anatomic reconstruction of the PLC by an arthroscopic technique. Kinematics of each knee under various loading conditions was determined with a robotic universal force/moment sensor testing system. Results After sectioning, significant increases were found in varus rotation at 0°, 15°, 30°, 60°, and 90° of knee flexion; in external rotation at 15°, 30°, 60°, and 90° of knee flexion; in internal rotation at 60° of knee flexion only; and in posterior translation at 15° and 30° of knee flexion. After reconstruction, full recovery of knee stability was observed in varus rotation, external rotation, internal rotation, and posterior translation at all selected flexion angles without any overconstraint of knee kinematics. Conclusions Anatomic reconstruction of the PLC can be performed arthroscopically with isolated grade III posterolateral instability of the knee, and nearly normal stability of the knee can be restored. Clinical Relevance PLC reconstruction by an anatomic, all-arthroscopic technique achieves optimal stability control and kinematics of the knee. To assess the role of anatomic reconstruction of the posterolateral corner (PLC) of the knee arthroscopically in cadaveric knees with simulated isolated grade III posterolateral instability. A total of 12 nonpaired, fresh-frozen cadaveric knees were biomechanically subjected to a 10-Nm varus moment, 5-Nm external and internal rotation torques, and 134-N posterior tibial load at 0°, 15°, 30°, 60°, and 90° of knee flexion (0° for varus loading only). Testing was performed with an intact and sectioned PLC and after anatomic reconstruction of the PLC by an arthroscopic technique. Kinematics of each knee under various loading conditions was determined with a robotic universal force/moment sensor testing system. After sectioning, significant increases were found in varus rotation at 0°, 15°, 30°, 60°, and 90° of knee flexion; in external rotation at 15°, 30°, 60°, and 90° of knee flexion; in internal rotation at 60° of knee flexion only; and in posterior translation at 15° and 30° of knee flexion. After reconstruction, full recovery of knee stability was observed in varus rotation, external rotation, internal rotation, and posterior translation at all selected flexion angles without any overconstraint of knee kinematics. Anatomic reconstruction of the PLC can be performed arthroscopically with isolated grade III posterolateral instability of the knee, and nearly normal stability of the knee can be restored." @default.
• W3000908766 created "2020-01-30" @default.
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• W3000908766 date "2020-04-01" @default.
• W3000908766 modified "2023-10-12" @default.
• W3000908766 title "Anatomic, All-Arthroscopic Reconstruction of Posterolateral Corner of the Knee: A Cadaveric Biomechanical Study" @default.
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• W3000908766 doi "https://doi.org/10.1016/j.arthro.2019.10.035" @default.
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