Zeitschrift für Orthopädie und ihre Grenzgebiete
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Z Orthop Ihre Grenzgeb · Jan 1990
Comparative Study[Diagnosis of transitory osteoporosis of the hip and its imaging in magnetic resonance tomography].
Magnetic resonance (MR) imaging may distinguish transient osteoporosis of the hip from more severe hip diseases. 12 patients with transient osteoporosis of the hip underwent MR imaging. The initial and follow-up studies included T1- and T2-weighted images in coronal, transverse or sagittal planes. ⋯ This syndrome is characterized by hip pain, limping, and osteoporosis of the femoral head with preservation of the joint space. The clinical symptoms and abnormalities on MR images disappeared completely within 6-10 months.
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Z Orthop Ihre Grenzgeb · Jan 1990
[Reactions of the osseous site following implantation of cemented endoprostheses in the femur].
17 autopsy femora with fixed cemented endoprostheses were sectioned horizontally and studied histologically, morphometrically and microradiographically. The implantation period varied between 0 and 12 years. ⋯ Enhanced microresorption and areas of reduced mineralization were found at the cement-bone interface. The total bone alterations, however, are not very extensive and seem not to be responsible for aseptic loosening, but the frequently inferior fixation instead.