Long-term remodeling in proximal femur around a hydroxyapatite-coated anatomic stem: ten years densitometric follow-up

Bone remodeling after a hip arthroplasty has been quantified with dual energy x-ray absorptiometry, usually for short-term follow-up. We used this technique to determine the long-term remodeling produced by a hydroxyapatite-coated, anatomic stem. Eighty patients with unilateral hip osteoarthritis we...

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Bibliographic Details
Published in:The Journal of arthroplasty 2009-01, Vol.24 (1), p.56-64
Main Authors: Panisello, Juan J, Herrero, Luis, Canales, Vicente, Herrera, Antonio, Martínez, Angel A, Mateo, Jesús
Format: Article
Language:English
Subjects:
Absorptiometry, Photon
Adult
Aged
Aging - physiology
Biomechanical Phenomena
Bone Density - physiology
Bone Remodeling - physiology
Durapatite
Female
Femur - diagnostic imaging
Femur - physiology
Follow-Up Studies
Hip Prosthesis
Humans
Longitudinal Studies
Male
Middle Aged
Osteogenesis - physiology
Prospective Studies
Time Factors
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Summary:Bone remodeling after a hip arthroplasty has been quantified with dual energy x-ray absorptiometry, usually for short-term follow-up. We used this technique to determine the long-term remodeling produced by a hydroxyapatite-coated, anatomic stem. Eighty patients with unilateral hip osteoarthritis were included in the study. The contralateral, healthy hip was taken as control. Bilateral dual energy x-ray absorptiometry scans were done before the surgery, at 15 days, and 1 and 10 years postoperatively. There was a decrease of bone mineral density in zones 1 and 7, which ranged from 12.2% to 27.3% at the end of the first year. There were no changes in zones 1 to 6 from the 1st to the 10th year, but there was a late decrease, up to 42.9%, in zone 7. The changes of bone mineral density promoted by this stem occurred in the first postoperative year. Late loss was seen only in area 7.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2007.12.017