Effect of Traditional Sequential Medial Soft Tissue Release on Knee Kinematics and Alignment

Deep K, Payne A, Khan MS, Goudie ST, Sharma M, Duffy S

Abstract


Traditionally sequential medial soft tissue release is performed for balancing varus knees in total knee arthroplasty Its effects on kinematics have been described in extension and deg flexion in coronal plane but not through complete range of flexion This study describes its effects on knee kinematics throughout the range of motion of the knee studied using a computer navigation system Twelve cadaveric knees were studied Femoro Tibial Mechanical Angle FTMA was studied in extension deg deg deg deg deg deg and maximum flexion Sequential medial release was performed in steps described by Luring et al At each step FTMA was measured with and without varus and valgus stressing A Newton Meter NM moment was applied for varus and valgus stress Most of the initial release steps had little effect on FTMA without force application especially in the initial deg of flexion Application of varus force demonstrated very small changes Even the application of valgus force demonstrated little change in initial arc of flexion until step in the release was reached Our study concludes that the present sequence of medial release may not be correct and should be investigated further to modify the sequence for sequential medial release for balancing in varus knees

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Copyright (c) 2020 Deep DeepPayne PayneKhan KhanGoudie GoudieSharma SharmaDuffy Duffy

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