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Weight-bearing status affects in vivo kinematics following mobile-bearing unicompartmental knee arthroplasty.
- Source :
-
Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA [Knee Surg Sports Traumatol Arthrosc] 2021 Mar; Vol. 29 (3), pp. 718-724. Date of Electronic Publication: 2020 Feb 13. - Publication Year :
- 2021
-
Abstract
- Purpose: The effects of weight bearing (WB) on knee kinematics following mobile-bearing unicompartmental knee arthroplasty (UKA) remain unknown. The purpose of this study was to clarify the effects of WB on in vivo kinematics of mobile-bearing UKA during high knee flexion activities.<br />Methods: The kinematics of UKA were evaluated under fluoroscopy during squatting (WB) and active-assisted knee flexion (non-weight bearing, NWB). Range of motion, femoral axis rotation relative to the tibia, anteroposterior (AP) translation of the medial and lateral sides, and kinematic pathway were measured.<br />Results: There were no differences in knee flexion range and external rotation of the femur in each flexion angle between the WB conditions. The amount of femoral external rotation between minimum flexion and 60° of flexion during WB was significantly larger than that during NWB, and that between 60° and 130° of flexion during NWB was significantly larger than that during WB. There were no differences in medial AP translation of the femur in each flexion angle between the WB conditions. However, on the lateral side, posterior translation of 52.9 ± 12.7% was observed between minimum flexion and 130° of flexion during WB. During NWB, there was no significant translation between minimum flexion and 60° of flexion; beyond 60° of flexion, posterior translation was 41.6 ± 8.7%. Between 20° and 80° of flexion, the lateral side in WB was located more posteriorly than in NWB (p < 0.05).<br />Conclusion: Mobile-bearing UKA has good anterior stability throughout the range of knee flexion. WB status affects the in vivo kinematics following mobile-bearing UKA.<br />Level of Evidence: III.
- Subjects :
- Aged
Anterior Cruciate Ligament physiopathology
Biomechanical Phenomena
Female
Femur physiopathology
Fluoroscopy
Humans
Knee surgery
Knee Joint physiopathology
Knee Joint surgery
Male
Osteoarthritis physiopathology
Posture
Range of Motion, Articular
Rotation
Tibia physiopathology
Arthroplasty, Replacement, Knee methods
Knee physiopathology
Osteoarthritis surgery
Weight-Bearing
Subjects
Details
- Language :
- English
- ISSN :
- 1433-7347
- Volume :
- 29
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA
- Publication Type :
- Academic Journal
- Accession number :
- 32055876
- Full Text :
- https://doi.org/10.1007/s00167-020-05893-x