Evidence about the Zimmer NexGen Knee Replacement System | Which Medical Device
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Orthopaedics
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Total knee replacement
The 11th Annual NJR report contains data relating to 1.6 million arthroplasty procedures.
Credits: National Joint Registry of England and Wales
In a review of NJR data, the authors demonstrated wide variation in patellar resurfacing by implant, but could not demonstrate a benefit for patellar resurfacing.
Credits: PubMed: J Arthroplasty. 2013 Jun 12. pii: S0883-5403(13)00372-0. doi: 10.1016/j.arth.2013.05.001. [Epub ahead of print]
The authors showed no difference in outcomes or patellar tilt between knees with a built in 3 degree external rotation (Genesis II) and one in which the external rotation was determined by bone cutting (Nexgen LPS). Free text link.
Credits: Knee Surg Relat Res. 2013 Sep;25(3):112-6. doi: 10.5792/ksrr.2013.25.3.112. Epub 2013 Aug 29.
This paper shows a difference between knee types in the "no thumb test" for patello-femoral tracking. Free Text Link.
Credits: Clin Orthop Surg. 2011 Dec;3(4):274-8
No advantage for the NexGen CR-flex design over the Genesis II knee in a single centre study. Free Full Text Link.
Credits: J Orthop Surg (Hong Kong). 2011 Aug;19(2):226-9.
This study from the National Joint Registry demonstrates that patient reported outcomes are partly driven by implant selection. Better outcomes were associated with the NexGen knee.
Credits: J Bone Joint Surg Br. 2012 Aug;94(8):1058-66.
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