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Bone Joint J. 2014 Oct;96-B(10):1333-8. doi: 10.1302/0301-620X.96B10.34068.

Increased satisfaction after total knee replacement using sensor-guided technology.

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University of South Florida College of Medicine, Florida Orthopaedic Institute, Department of Orthopaedic Surgery, 13030 Telecom Parkway North, Temple Terrace, Florida 33637, USA.
VCU Medical Center, P.O. Box 980153, Richmond, Virginia 23298, USA.
Orthosensor Inc, Department of Clinical and Bioengineering Research, 1855 Griffin Road, Dania, Florida 33004, USA.
Bone and Joint Institute, 2611 Electric Avenue, Port Huron, Michigan 48060, USA.


The aim of this prospective multicentre study was to report the patient satisfaction after total knee replacement (TKR), undertaken with the aid of intra-operative sensors, and to compare these results with previous studies. A total of 135 patients undergoing TKR were included in the study. The soft-tissue balance of each TKR was quantified intra-operatively by the sensor, and 18 (13%) were found to be unbalanced. A total of 113 patients (96.7%) in the balanced group and 15 (82.1%) in the unbalanced group were satisfied or very satisfied one year post-operatively (p = 0.043). A review of the literature identified no previous study with a mean level of satisfaction that was greater than the reported level of satisfaction of the balanced TKR group in this study. Ensuring soft-tissue balance by using intra-operative sensors during TKR may improve satisfaction.


Increased patient satisfaction; Intra-operative sensors; One-year follow-up; Soft-tissue balance; Total Knee Replacement

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