A prospective randomised double-blind study of functional outcome and range of flexion following total knee replacement with the NexGen standard and high flexion components

R W Nutton, M L van der Linden, P J Rowe, P Gaston, F A Wade

Research output: Contribution to journalArticlepeer-review

Abstract

Modifications in the design of knee replacements have been proposed in order to maximise flexion. We performed a prospective double-blind randomised controlled trial to compare the functional outcome, including maximum knee flexion, in patients receiving either a standard or a high flexion version of the NexGen legacy posterior stabilised total knee replacement. A total of 56 patients, half of whom received each design, were assessed pre-operatively and at one year after operation using knee scores and analysis of range of movement using electrogoniometry. For both implant designs there was a significant improvement in the function component of the knee scores (p <0.001) and the maximum range of flexion when walking on the level, ascending and descending a slope or stairs (all p <0.001), squatting (p = 0.020) and stepping into a bath (p = 0.024). There was no significant difference in outcome, including the maximum knee flexion, between patients receiving the standard and high flexion designs of this implant.
Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalJournal of Bone and Joint Surgery, British Volume
Volume90
Issue number1
DOIs
Publication statusPublished - 2008

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