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Load balance in total knee arthroplasty: an in vitro analysis

✍ Scribed by Ron El-Hawary; Sandra E. Roth; Graham J. W. King; David G. Chess; James A. Johnson

Publisher: Wiley (Robotic Publications)
Year: 2006
Tongue: English
Weight: 135 KB
Volume: 2
Category: Article
ISSN: 1478-5951
DOI: 10.1002/rcs.96

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Background

One of the goals of total knee arthroplasty (TKA) is to balance the loads between the compartments of the knee. An instrumented load cell that measures compartment loads in real time is utilized to evaluate conventional, qualitative methods of achieving this balance.

Methods

TKA was performed on 10 cadaveric knees. Prior to and after load balancing, compartment forces were measured at flexion angles of 0–90°. Knees were randomly assigned into one of two groups, based upon whether or not the surgeons could visualize the load cell's output during balancing.

Results

Prior to attempting load balance, there were significant differences between the medial and lateral compartment loads for all knees (p < 0.05). After attempting balance with the aid of the load cell, there was equal load balance at all angles studied. Without the aid of the load cell, balance was not consistently achieved at every angle.

Conclusions

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