Stability differentials for proximal vs distal fusion of total hip arthroplasty femoral impaction grafts |
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Authors: | Heiner Anneliese D Callaghan John J Brown Thomas D |
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Affiliation: | †Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa;‡Orthopaedics Department, VA Medical Center, Iowa City, Iowa;Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa |
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Abstract: | In impaction grafting for revision joint arthroplasty, the morselized cancellous bone ideally remodels into a new contiguous lattice. However, the use of biologically active factors may sometimes be indicated to enhance fusion. The purpose of this study was to determine the stability of femoral impaction-graft constructs for which either only the proximal or distal half of the morselized cancellous bone volume was modeled as fused. Fusing the proximal half of the impaction-graft volume resulted in a higher femoral stem stability than did fusing the distal half. This proximal graft fusion also resulted in a stem stability that was similar to that of fusing the entire graft. These results emphasize the importance of proximal fixation of an impaction-grafted femoral stem. |
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Keywords: | bone remodeling hip arthroplasty impaction grafting mechanical testing morselized bone revision surgery |
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