A biomechanical study on proximal plate fixation techniques in periprosthetic femur fractures
作者： Mark Lenz , Stephan M Perren , Boyko Gueorguiev , Robert G Richards , Gunther O Hofmann
DOI: 10.1016/J.INJURY.2013.10.027
关键词: Compression (physics) 、 Bone mineral 、 Plate fixation 、 Cumulative survival 、 Femur 、 Medicine 、 Surgery 、 Osteosynthesis 、 Orthodontics 、 Periprosthetic 、 Fixation (surgical)
摘要: Abstract Introduction Proximal plate fixation is a crucial factor in osteosynthesis of periprosthetic femur fractures. Stability and strength different concepts for proximal were compared. Materials methods Twelve fresh frozen, bone mineral density matched human femora, instrumented with cemented hip endoprosthesis osteotomized simulating Vancouver B1 fracture. Specimens locking compression plates, fixed proximally either attachment (LAP), monocortical screws, cerclage plus screws (1cerclage) or cerclages only (4cerclages). Cyclic testing was performed monotonically increasing load until failure. Relative movements at the plate–femur interface registered by motion tracking. Results The LAP construct exhibited significantly longer cumulative survival (failure criterion 1 mm separation fixation) compared to ( p = 0.048) 4cerclages constructs = 0.012) but not 1cerclage constructs. Conclusion Bicortical screw anchorage improves cerclage–screw combination valuable alternative especially osteoporotic bone.
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