Abstract
To determine the tibio-femoral and bearing motions in well functioning mobile bearing total knee arthroplasties, a quantitative analysis by means of fluoroscopy was carried out during stair ascending, chair rising-sitting and step up-down motor tasks. Femoral and tibial component positions were obtained using a CAD-model-based shape matching technique. Direct measurement of mobile bearing motion was carried out by tracking previously inserted tantalum beads. A relatively small motion of the bearing was observed. The advantage of self-alignment claimed for the mobile bearing arthroplasty seems to be confirmed by subject-specific ranges of motion exhibited by these patients. It has also been demonstrated that these total knee arthroplasties, which are not fully conforming in flexion, provide little constraint to antero-posterior motion, leading to a kinematic pattern very similar to an ACL deficient knee.
Original language | English |
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Pages (from-to) | 144-151 |
Number of pages | 8 |
Journal | Knee Surgery, Sports Traumatology, Arthroscopy |
Volume | 12 |
Issue number | 2 |
DOIs | |
Publication status | Published - Mar 2004 |
Keywords
- Activities of daily living
- Fluoroscopy
- Mobile bearing tracking
- Prosthesis component kinematics
- Total knee arthroplasty
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
- Surgery