Stability differentials for proximal vs distal fusion of total hip arthroplasty femoral impaction grafts.
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.
Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa 52242, USA.
Anneliese D
AD
Heiner
John J
JJ
Callaghan
Thomas D
TD
Brown
D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D016723:Bone Remodeling / Q000502:physiology; D016025:Bone Transplantation / Q000379:methods*; D005269:Femur / Q000502:physiology / Q000601:surgery*; D006621:Hip Joint / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology / Q000517:prevention & control*; D008954:Models, Biological; D016059:Range of Motion, Articular / Q000502:physiology; D012086:Reoperation