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J Bone Joint Surg Br. 2008 Jan;90(1):37-42.

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.

Author information

1
Arthroplasty Service, Royal Infirmary of Edinburgh, Little France, Edinburgh EH16, 4SU, UK. richard.nutton@luht.scot.nhs.uk

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.

PMID:
18160497
DOI:
10.1302/0301-620X.90B1.19702
[Indexed for MEDLINE]

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