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Journal of Bone and Joint Surgery - British Volume, Vol 86-B, Issue 1, 20-26.
doi: 10.1302/0301-620X.86B1.14637  
Copyright © 2004 by British Editorial Society of Bone and Joint Surgery
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Changes in bone mineral density in the proximal femur after cementless total hip arthroplasty

A FIVE-YEAR LONGITUDINAL STUDY

W. Brodner, MD, Consultant Orthopaedic Surgeon1; P. Bitzan, MD, Consultant Orthopaedic Surgeon1; F. Lomoschitz, MD, Radiologist2; P. Krepler, MD, Consultant Orthopaedic surgeon1; R. Jankovsky, MD, Orthopaedic Registrar3; S. Lehr, MSc, Statistician4; F. Kainberger, MD, Radiologist2; and F. Gottsauner-Wolf, MSc, PhD, Chairman5

1 Department of Orthopaedics
2 Department of Radiology, Vienna General Hospital and the University of Vienna, Währinger Gurtel 18-20, A-1090 Vienna, Austria.
3 Landesklinik für Orthopädie Salzburg, Müllner Hauptstrasse 48, A-5020 Salzburg, Austria.
4 Institute of Medical Computer Sciences, University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria.
5 Department of Orthopaedics, General Hospital Krems, Mitterweg 10, A-3500 Krems an der Donau, Austria.

Correspondence should be sent to Dr W. Brodner.

We investigated prospectively the bone mineral density (BMD) of the proximal femur after implantation of a tapered rectangular cementless stem in 100 patients with a mean age of 60 years (16 to 87). It was determined using dual energy x-ray absorptiometry, performed one week after surgery and then every six months until the end-point of five years.

The BMD increased significantly in Gruen zones 2, 4 and 5 by 11%, 3% and 11% respectively, and decreased significantly in Gruen zones 1, 6 and 7 by 3%, 6% and 14% respectively, over the five-year period. The net mean BMD did not change over this time period. The changes in the BMD were not confined to the first 12 months after surgery. This investigation revealed no change in the overall periprosthetic BMD, but demonstrated a regional redistribution of bone mass from the proximal to distal zones.




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Home page
 J Bone Joint Surg BrHome page
Y.-H. Kim, S.-H. Yoon, and J.-S. Kim
Changes in the bone mineral density in the acetabulum and proximal femur after cementless total hip replacement: ALUMINA-ON-ALUMINA VERSUS ALUMINA-ON-POLYETHYLENE ARTICULATION
J Bone Joint Surg Br, February 1, 2007; 89-B(2): 174 - 179.
[Abstract] [Full Text] [PDF]


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