A proximal fixed anatomic femoral stem reduces stress shielding

In 24 patients with total hip replacement using a short anatomic femoral stem, bone mineral density (BMD) was measured after a 7-year follow-up using dual-energy X-ray absorptiometry. The contralateral side was used as a control. The BMD on the side of the prosthesis was lower by a mean of 7% than t...

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Bibliographic Details
Published in:International orthopaedics 2001-04, Vol.25 (2), p.85-88
Main Authors: NIINIMÄKI, T, JUNILA, J, JALOVAARA, P
Format: Article
Language:English
Subjects:
Absorptiometry, Photon
Adult
Aged
Arthroplasty, Replacement, Hip - instrumentation
Arthroplasty, Replacement, Hip - methods
Biological and medical sciences
Bone Density - physiology
Bone Resorption - diagnostic imaging
Female
Follow-Up Studies
Hip Prosthesis
Humans
Male
Medical sciences
Middle Aged
Original Paper
Orthopedic surgery
Prosthesis Design
Prosthesis Fitting
Reference Values
Stress, Mechanical
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Time Factors
Treatment Outcome
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Description
Summary:In 24 patients with total hip replacement using a short anatomic femoral stem, bone mineral density (BMD) was measured after a 7-year follow-up using dual-energy X-ray absorptiometry. The contralateral side was used as a control. The BMD on the side of the prosthesis was lower by a mean of 7% than that on the control side. The difference was greatest in the area of the calcar and laterally and proximally around the stem. BMD at the metaphyseal and diaphyseal areas were the same as on the contralateral side. The bone loss around the proximal aspect of the stem may be related to the proximal porous coating. It is concluded that stress shielding can be diminished by appropriate design of the femoral component.
ISSN:0341-2695
1432-5195
DOI:10.1007/s002640100241