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MR Vol.11 No3 indexに戻る
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MODERN RHEUMATOLOGY
Vol.11 No.3 |
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Longitudinal change in periprosthetic, peripheral,
and axial bone mineral density after total hip arthroplasty |
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| Y. Hirano1, H. Hagino1, K. Nakamura1, H.
Katagiri1, T. Okano1, H. Kishimoto1, K. Morimoto2, R. Teshima1,
K. Yamamoto1 |
(1)Department of Orthopedic Surgery, Faculty
of Medicine, Tottori University, 36-1 Nishi-cho, Yonago 683-8504,
Japan
(2)Department of Orthopedic Surgery, Kaikeonsen Hospital, Yonago, Japan |
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| Abstract |
| Abstract To determine the bone mineral changes
after total hip arthroplasty, bone mineral densities (BMD) at the
periprosthetic interface, lumbar spine, radius, and calcaneus were
measured in a prospective and longitudinal observation. Twenty-four
patients (24 joints) who had received a total hip arthroplasty
and were followed longitudinally were enrolled in this study. The
subjects comprised 2 men and 22 women with a mean age of 69.2 years
at the time of surgery. Bone mineral measurements were performed
at 1, 3, 6, 12, 18, 24, 30, and 36 months after surgery. The periprosthetic
BMD after total hip arthroplasty continued to decrease for 6-12
months after surgery, and then recovered, except in Gruen zone
7 (the calcar region). The calcaneal BMD decreased rapidly for
3 months after surgery before increasing. The lumbar BMD showed
a decreasing trend for 12 months after surgery, and then increased
gradually. The radial BMD was not affected by surgery. We conclude
that changes in the periprosthetic BMD after total hip arthroplasty
show an apparent difference between zones, and also differ between
the weight-bearing bones and the nonweight-bearing bones. |
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| Key words |
| Key words Bone mineral density ・ Osteoarthritis
・ Total hip arthroplasty |
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