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  • Title: Decrease in vertebral bone density after hip arthroplasty. A quantitative computed tomography study in 18 arthrosis cases.
    Author: Adolphson P, von Sivers K, Dalén N, Jonsson U, Dahlborn M.
    Journal: Acta Orthop Scand; 1994 Feb; 65(1):12-4. PubMed ID: 8154275.
    Abstract:
    We investigated the bone mineral density (BMD) of the lumbar vertebrae L1-3 with quantitative computed tomography (QCT) in 18 patients who had been operated on with hip arthroplasty because of unilateral arthrosis. In an earlier prospective study, we did not find any bone mineral changes in the femur or tibia after hip arthroplasty in spite of a large increase of the thigh muscle mass as a sign of a remobilization after the operation. The median BMD had decreased 5.3-8.4 percent in all the measured vertebrae after 6 months postoperatively. Because of the patients' improved walking ability after the operation, this decrease in cancellous vertebral BMD is interpreted as a sign of a post-traumatic osteopenia.
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