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Journal of Bone and Joint Surgery - British Volume, Vol 87-B, Issue 6, 796-799.
doi: 10.1302/0301-620X.87B6.15776  
Copyright © 2005 by British Editorial Society of Bone and Joint Surgery
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The significance of surface changes on retrieved femoral components after total knee replacement

A. Lakdawala, MRCS, Research Registrar; S. Todo, MD, PhD, Orthopaedic Registrar; and G. Scott, FRCS, Consultant Orthopaedic Surgeon

Holly House Hospital, Buckhurst Hill, Essex IG9 5HX, UK, Sekeikai Hospital 4-2-10 Kouryounaka-machi, Sakai City, Osaka 590-0024, Japan, Bone & Joint Research Unit Royal London Hospital, Whitechapel, London E1 1BB, UK.

Correspondence should be sent to A. Lakdawala, c/o Mr J. Ireland, 17 King’s Avenue, Woodford Green, Essex IG8 0JD, UK; e-mail: ayazl{at}aol.com

We investigated the changes in surface roughness of retrieved femoral components in 18 men and four women at revision knee surgery. The mean age at revision was 68.4 years and the mean period of implantation was for 55.6 months. Eighteen implants were retrieved for aseptic loosening and four for infection. The surface changes in the articulating areas were inspected visually and the roughness (Ra) analysed with a profilometer. Parallel scratching and burnishing were the two main forms of damage. The mean Ra measurements in the articulating areas showed no statistically significant difference when compared with those in a control area on either side of the patellar groove at the apex of the femoral flange. This suggests that it is not essential to revise a well-fixed and correctly aligned femoral component where the polished surface has become burnished or bears fine parallel scratches, if the revision is conducted solely for failure of the tibial component.




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Measuring surface changes
E. Alexander Reeves
J Bone Joint Surg Br Online, 16 Jun 2005 [Full text]

(c) British Editorial Society of Bone and Joint Surgery All Rights Reserved
Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General