Zimmer | UniSpacer Knee System | Which Medical Device
Categorised under:
Orthopaedics
>
Knee
>
Interposition or resurfacing arthroplasty
From Which Medical Device
This device from Zimmer is a cobalt chrome spacer which can correct the malalignment of varus knees with osteoarthritis. It requires little in the way of bone cuts or soft tissue injury for insertion. The device is intended for the medial compartment, although a lateral version is available.
There are few published results. Clarius et al noted that malalignment can be corrected with this device, but that 4 of 19 knees required revision for persistent pain.
In a series by Bailie et al, there was a similarly high revision rate, and the authors reported unpredictable relief of pain.
References:
Clarius M, Becker JF, Schmitt H, Seeger JB. The UniSpacer: correcting varus malalignment in medial gonarthrosis. Int Orthop. .2009 Nov 28.
Bailie AG, Lewis PL, Brumby SA, Roy S, Paterson RS, Campbell DG. The Unispacer knee implant: early clinical results. J Bone Joint Surg Br. 2008 apr;90(4): 446-50.
Commentary and perspective on UniSpacer Arthroplasty of the knee. Springer BD, Scott RD. eJBJS 2005. Available at http://www.jbjs.org/Comments/2005/cp_aug05_springer.shtml
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