title: The mechanical stability of allografts after a cleaning process: comparison of two preparation modes.
abstract: In revision hip arthroplasty, bone loss can be compensated by impacting allograft material. Cleaning processes reduce the risk of bacterial and viral contamination. Cleaned allograft material was compared to native untreated allografts by using a uniaxial compression test. 30 measurements were performed for each group before and after compaction. Grain size distribution and weight loss were determined. A reduction in the amount of large bone fragments and a higher compaction rate were observed in the cleaned bone grafts. The cleaned bone chips presented with a better mechanical resistance to a compression force and a reduced flowability. The benefit of a cleaner and a mechanical stable graft material comes with the drawback that higher initial amounts of graft material are needed.
authors.affiliation: Experimental Orthopedics, Department of Orthopedics, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: David
authors.initials: D
authors.lastname: Putzer
authors.affiliation: Experimental Orthopedics, Department of Orthopedics, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Debora Coraca
authors.initials: DC
authors.lastname: Huber
authors.affiliation: Experimental Orthopedics, Department of Orthopedics, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Alexander
authors.initials: A
authors.lastname: Wurm
authors.affiliation: Department of Trauma Surgery, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Werner
authors.initials: W
authors.lastname: Schmoelz
authors.affiliation: Experimental Orthopedics, Department of Orthopedics, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Nogler
mesh_terms: D064591:Allografts; D019644:Arthroplasty, Replacement, Hip; D001696:Biomechanical Phenomena; D016025:Bone Transplantation; D005270:Femur Head / Q000502:physiology* / Q000601:surgery*; D006801:Humans; D008954:Models, Biological; D010316:Particle Size; D016459:Prosthesis-Related Infections / Q000517:prevention & control; D012086:Reoperation; D013242:Sterilization / Q000379:methods; D020858:Tissue and Organ Harvesting / Q000379:methods; D014184:Transplantation, Homologous
keywords: bone impaction grafting; cleaning process for allograft material; compaction of allograft material; hip arthroplasty revision; processing allograft material