Comparison of 2 Surgical Techniques for Reconstructing Posterolateral Corner of the Knee: A Cadaveric Study Evaluated by Navigation System
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AbstractPurpose: This study aimed to evaluate the immediate effect on knee kinematics by 2 different techniques of posterolateral corner (PLC) reconstruction. Methods: Five intact formalin-preserved cadaveric knees were used in this study. A navigation system was used to measure knee kinematics (posterior translation, varus angulation, and external rotation) after application of a constant force and torque to the tibia. Four different conditions of the knee were evaluated during the biomechanical test: intact knee and PLC-sectioned knee and PLC-reconstructed knee by the double-femoral tunnel technique and single-femoral tunnel technique. Results: Sectioning of the PLC structures resulted in significant increases in external rotation at 30 degrees of flexion from 11.2 degrees (SD, 2.6) to 24.6 degrees (SD, 6.2), posterior translation at 30 degrees of flexion from 3.4 mm (SD, 1.5) to 7.4 mm (SD, 3.8), and varus angulation at 0 degrees of flexion from 2.3 degrees (SD, 2.1) to 7.9 degrees (SD, 5.1). Both reconstruction techniques significantly restored the varus stability. The external rotation and posterior translation at 30 degrees of flexion after reconstruction with the double-femoral tunnel technique were 10.2 degrees (SD, 1.3) and 3.4 degrees (SD, 2.7), respectively, which were significantly better than those of the single-femoral tunnel technique. Conclusions: Both techniques of reconstruction showed improved stability compared with PLC-sectioned knees. The double-femoral tunnel technique in PLC reconstruction showed better rotational stability and resistance to posterior translation than the single-femoral tunnel technique without compromising varus stability. Clinical Relevance: PLC reconstruction by a double-femoral tunnel technique achieves better rotational control and resistance to posterior translation.
All Author(s) ListHo EPY, Lam MH, Chung MML, Fong DTP, Law BKY, Yung PSH, Chan WY, Chan KM
Journal nameArthroscopy: The Journal of Arthroscopy and Related Surgery
Volume Number27
Issue Number1
Pages89 - 96
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesOrthopedics; ORTHOPEDICS; Surgery; SURGERY

Last updated on 2020-08-07 at 04:17