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Conventional Navigation and Extension Gap First Technique for proper bone cuts in TKA

Published in N°255 - June (Special)
Article viewed 724 times

Conventional Navigation and Extension Gap First Technique for proper bone cuts in TKA

By S. Hofmann, G. Seitlinger, O. Djahani,M. Pietsch in category TECHNIQUE
General & Orthopaedic Hospital, Department Joint Reconstruction, 8852 LKH-Stolzalpe, Austria - Tél. +43 3532 2424 2401 [email protected]

The challenge in total knee arthroplasty (TKA) is to achieve perfect alignment, rotational positioning, balancing and fixation of the implants without any additional risks or drawbacks. Furthermore the success and longevity of TKA is predicated by correction of the individual deformity of the knee.

Introduction

The challenge in total knee arthroplasty (TKA) is to achieve perfect alignment, rotational positioning, balancing and fixation of the implants without any additional risks or drawbacks [15]. Furthermore the success and longevity of TKA is predicated by correction of the individual deformity of the knee [17]. One of the challenges in TKA is to perform the proper bone cuts in the frontal, sagittal and axial plane to correct the underlying deformity [23]. The type and grades of soft tissue releases is determined by the two main factors of bone correction cuts and pre-existing soft tissue imbalances. Without proper bone cuts soft tissue balancing of the knee is not possible in most of the cases.

In the frontal plane the bone cuts correct the varus- and valgus malalignment at the tibia and/ or femur. In the sagittal plane at the tibia they determine the posterior inclination (slope) and at the distal femur the flexion/extension positioning of the implant. In the axial plane at the tibia the rotational positioning of the implant is the most important factor for proper patella tracking [8]. In the axial plane at the femur the anterior and posterior cuts determine the sizing, anterior-posterior and rotational positioning of the implant. These parameters are most...

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