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Ground kinematically aligned total knee arthroplasty: new personalized technique which enables a stable knee with deep flexion

Matsumoto, Tomoyuki Nakano, Naoki Ishida, Kazunari Kuroda, Yuichi Hayashi, Shinya Muratsu, Hirotsugu Kuroda, Ryosuke 神戸大学

2023.09

概要

Purpose: This study aimed to evaluate kinematically aligned total knee arthroplasty (KA-TKA) targeting the neutral ground mechanical axis (MA) (hip-to-calcaneus axis), the line from the hip centre to the bottom of the calcaneus, (ground KA-TKA) in terms of its comparison with tibia-restricted modified KA-TKA (modified KA-TKA). Methods: This retrospective cohort study included 106 consecutive patients who underwent unilateral KA-TKA for varus osteoarthritis (OA) (60 modified KA-TKAs and 46 ground KA-TKAs). After 1:1 propensity score matching, 60 patients (30 pairs) were matched between the groups with comparable demographic data. The hip-knee-ankle (HKA) angle, coronal femoral component alignment (FCA), and coronal tibial component alignment (TCA) were compared between groups. Intraoperative soft tissue balance, including the joint component gap and varus/valgus balance, was also compared between the groups. One year postoperatively, the clinical outcomes, including the range of motion and 2011 Knee Society Score, were compared between groups. Results: The HKA angle and FCA/TCA were not significantly different between groups. Whereas the varus/valgus balance showed no significant differences between groups, smaller joint component gaps were found throughout the range of motion in the ground KA-TKA group than in the modified KA-TKA group. Despite no difference in clinical scores between groups, a significantly deeper postoperative flexion angle was achieved in the ground KA-TKA group than in the modified KA-TKA group (p < 0.05). Conclusion: Targeting neutral ground MA in KA-TKA for patients with varus OA has the potential to provide a better flexion angle with stable intraoperative soft tissue balance.

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Ground kinematically aligned total knee arthroplasty: new personalized technique which enables a stable knee with deep flexion

概要

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関連論文

Targeting the neutral hip-to-calcaneus axis in kinematically aligned total knee arthroplasty is feasible with fewer alignment outliers for varus osteoarthritic patients

Prosthetic orientation, limb alignment, and soft tissue balance with bi-cruciate stabilized total knee arthroplasty: a comparison between the handheld robot and conventional techniques

Preoperative varus deformity of the knee affects the intraoperative joint gap in unicompartmental knee arthroplasty

Knee Flexion Angle Following Total Knee Arthroplasty Relates to a Preoperative Range of Motion of the Hip

Clinical and radiographic outcomes of primary total hip arthroplasty with the Revelation Hip System using density mapping<Abstract of dissertation>

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Ground kinematically aligned total knee arthroplasty: new personalized technique which enables a stable knee with deep flexion

概要

この論文で使われている画像

関連論文

Targeting the neutral hip-to-calcaneus axis in kinematically aligned total knee arthroplasty is feasible with fewer alignment outliers for varus osteoarthritic patients

Prosthetic orientation, limb alignment, and soft tissue balance with bi-cruciate stabilized total knee arthroplasty: a comparison between the handheld robot and conventional techniques

Preoperative varus deformity of the knee affects the intraoperative joint gap in unicompartmental knee arthroplasty

Knee Flexion Angle Following Total Knee Arthroplasty Relates to a Preoperative Range of Motion of the Hip

Clinical and radiographic outcomes of primary total hip arthroplasty with the Revelation Hip System using density mapping<Abstract of dissertation>

参考文献