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Journal of Bone and Joint Surgery - British Volume, Vol 89-B, Issue 4, 471-476.
doi: 10.1302/0301-620X.89B4.18878  
Copyright © 2007 by British Editorial Society of Bone and Joint Surgery
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Alignment and orientation of the components in total knee replacement with and without navigation support

A PROSPECTIVE, RANDOMISED STUDY

Y.-H. Kim, MD, Professor and Director1; J.-S. Kim, MD, Professor1; and S.-H. Yoon, MD, Clinical Fellow1

1 The Joint Replacement Centre of Korea, Ewha Womans University, DongDaeMun Hospital 70, ChongRo 6-Ga, ChongRo-Gu, Seoul, Korea.

Correspondence should be sent to Dr Y.-H. Kim; e-mail: younghookim{at}ewha.ac.kr

Bilateral sequential total knee replacement was carried out under one anaesthetic in 100 patients. One knee was replaced using a CT-free computer-assisted navigation system and the other conventionally without navigation. The two methods were compared for accuracy of orientation and alignment of the components. There were 85 women and 15 men with a mean age of 67.6 years (54 to 83). Radiological and CT imaging was carried out to determine the alignment of the components. The mean follow-up was 2.3 years (2 to 3).

The operating and tourniquet times were significantly longer in the navigation group (p < 0.001). There were no significant pre- or post-operative differences between the knee scores of the two groups (p = 0.288 and p = 0.429, respectively). The results of imaging and the number of outliers for all radiological parameters were not statistically different (p = 0.109 to p = 0.920).

In this series computer-assisted navigated total knee replacement did not result in more accurate orientation and alignment of the components than that achieved by conventional total knee replacement.




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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General