Abstract
Knee kinematics were analyzed in subjects with unicompartmental knee arthroplasty (UKA) during deep knee bend (DKB) and stance phase of gait, using video fluoroscopy. Femorotibial contact positions were determined using a computer-automated model-fitting technique. During DKB, subjects with medial UKA experienced on average −0.8 mm of posterior femoral roll-back (PFR), those with lateral UKA −2.5 mm. During stance phase of gait, subjects with medial UKA experienced on average 0.8 mm of PFR, those with lateral UKA −0.4 mm. During DKB normal axial rotation was found for two thirds of subjects (average = 3.3° and 11.2°, respectively, for medial and lateral UKA) and during stance phase of gait for half of the subjects with medial UKA and one quarter with lateral UKA (average of 0.9° and −6.0°, respectively). On average, subjects with UKA experienced kinematic patterns similar to those of the normal knee. The kinematic variability for some subjects suggests progressive laxity of the anterior cruciate ligament, which confirms its role for maintaining satisfactory knee kinematics in UKA.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
