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Journal of Bone and Joint Surgery - British Volume, Vol 84-B, Issue 8, 1199-1204.
doi: 10.1302/0301-620X.84B8.12598  
Copyright © 2002 by British Editorial Society of Bone and Joint Surgery
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The influence of surface roughness on stem-cement gaps

A. Race, PhD, Assistant Professor1; M. A. Miller, MS, Research Engineer1; D. C. Ayers, MD, Director of Adult Reconstruction1; R. J. Cleary, PhD, Associate Professor2; and K. A. Mann, PhD, Associate Professor1

1 Institute for Human Performance, Musculoskeletal Science Research tre, SUNY Upstate Medical University, Syracuse, New York 13210, USA.
2 Bentley College, Waltham, Massachusetts, USA.

Correspondence should be sent to Dr A. Race.

We have compared the interface morphology at the stem-cement interface of standard Charnley stems with a satin finish (Ra = 0.75 µm) with identical stems which had been grit-blasted over their proximal third (Ra = 5.3 µm) to promote a proximal bond. The stems were cemented into cadaver femora using conventional contemporary cementing techniques. After transverse sectioning, we determined the percentage of the perimeter of the stem which had a gap at the interface.

There were substantial gaps (mean 31.4 ± 17.1%) at the stem-cement interface in the grit-blasted region. This fraction was significantly (paired t-test, p = 0.0054) higher than that found around the contralateral satin-finished stems (mean 7.7 ± 11.7%). Although studies of isolated metal-cement interfaces have shown that the bond strength can increase with surface roughness it cannot be assumed that this effect will be observed under clinical conditions.




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T. Scheerlinck, P. Vandenbussche, and P. C. Noble
Quantification of stem-cement interfacial gaps: IN VITRO CT ANALYSIS OF CHARNLEY-KERBOUL AND LUBINUS SPII FEMORAL HIP IMPLANTS
J Bone Joint Surg Br, January 1, 2008; 90-B(1): 107 - 113.
[Abstract] [Full Text] [PDF]


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