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Journal of Bone and Joint Surgery - British Volume, Vol 89-B, Issue 6, 730-735.
doi: 10.1302/0301-620X.89B6.18317  
Copyright © 2007 by British Editorial Society of Bone and Joint Surgery
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A study of the Elite Plus femoral component using radiostereometric analysis

B. Derbyshire, BSc, MSc, PhD, Research Fellow1; and M. L. Porter, FRCSEd, FRCS Ed(Orth), Consultant Orthopaedic Surgeon1

1 Wrightington Wigan and Leigh NHS Trust, Centre for Hip Surgery Wrightington Hospital, Hall Lane, Appley Bridge WN6 9EP, UK.

Correspondence should be sent to Dr B. Derbyshire; e-mail: Brian.Derbyshire{at}wwl.nhs.uk

We performed a three-year radiostereometric analysis (RSA) study of the Elite Plus femoral component on 25 patients undergoing primary total hip replacement. Additional assessments and measurements from standard radiographs were also made.

Subsidence of the stem occurred at the cement-stem interface. At 36 months the subsidence of the stem centroid was a mean of 0.30 mm (0.02 to 1.28), and was continuing at a slow rate. At the same time point, internal rotation and posterior migration of the femoral head had ceased. One stem migrated excessively and additional assessments suggested that this was probably due to high patient demand.

The failure rate of 4% in our study is consistent with data from arthroplasty registers but contrasts with poor results from another RSA study, and from some clinical studies. We believe that the surgical technique, particularly the use of high-viscosity cement, may have been an important factor contributing to our results.




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M. R. WHITEHOUSE
A study of the Elite Plus femoral component using radiostereometric analysis
J Bone Joint Surg Br, September 1, 2007; 89-B(9): 1270 - 1270.
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A study of the Elite Plus femoral component using radiostereometric analysis
Michael R Whitehouse
J Bone Joint Surg Br Online, 23 Aug 2007 [Full text]
Authors' Reply
Brian Derbyshire, et al.
J Bone Joint Surg Br Online, 6 Sep 2007 [Full text]

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