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Orthopädische Klinik Wichernhaus Rummelsberg, Schwarzenbruck/Nürnberg.
When total hip prostheses loosen after initial implantation and subsequent prosthesis replacement, increasing bone resorption occurs in the bed of the prosthesis. Finally, a very thin cortex remains in the bed of the prosthesis, which no longer provides sufficient mechanical stability. The replacement prosthesis described, which is anchored in the distal medullary canal without cement, provides a bridge over the damaged prosthesis bed and results in a condition of relative mechanical stability. After implantation of the replacement prosthesis, lively proliferation of the bone tissue occurs in the old prosthesis bed, which again replaces the bone loss that had taken place previously. The late results that would permit a final assessment of the procedure are not yet available.
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