J Knee Surg 2022; 35(12): 1342-1348
DOI: 10.1055/s-0041-1723763
Original Article

The Association between In Vivo Knee Kinematics and Patient-Reported Outcomes during Squatting in Bicruciate-Stabilized Total Knee Arthroplasty

Tomofumi Kage
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
Hiroshi Inui
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
2   Department of Orthopaedic Biomaterial Science, Graduate School of Medicine, Osaka University, Osaka, Japan
,
Takaharu Yamazaki
3   Department of Information Systems, Faculty of Engineering, Saitama Institute of Technology, Fukaya, Saitama, Japan
,
Shuji Taketomi
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
Kenichi Kono
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
Kohei Kawaguchi
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
Kentaro Takagi
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
Shin Sameshima
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
,
Sakae Tanaka
1   Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
› Author Affiliations
Funding None.
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Abstract

Bicruciate-stabilized total knee arthroplasty (BCS TKA) has been developed to improve TKA kinematic performance. However, the relationship between in vivo kinematics and patient-reported outcomes (PROs) has not been well described. This study was performed to clarify the relationship between in vivo kinematics and PROs in a cohort of patients undergoing BCS TKA. Forty knees were evaluated using a two-dimensional to three-dimensional registration technique obtained from sagittal plane fluoroscopy. In vivo kinematics including anteroposterior (AP) translation and tibiofemoral rotation were evaluated. Knee Society scores (KSSs) and Knee injury and Osteoarthritis Outcome Scores (KOOSs) were assessed before and after surgery. Relationships between tibiofemoral kinematics assessed with the knee in different positions of knee flexion and PROs were evaluated using Spearman's correlation analysis. The study demonstrated a significant negative correlation (r =  − 0.33) between medial AP translation from minimum flexion to 30 degrees flexion and postoperative KOOS activities of daily living subscale. A significant positive correlation (r = 0.51) was found between the femoral external rotation from minimum flexion to 30 degrees flexion and improvement of the KOOS pain subscale. No correlation was found between the lateral AP translation and PROs. Achieving medial AP and femoral external rotation stability in early flexion may be important in optimizing postoperative PROs.



Publication History

Received: 29 May 2020

Accepted: 17 December 2020

Article published online:
05 February 2021

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