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While autologous bone grafts are highly suitable for use in spinal arthrodesis, their use is also associated with problems (traumatization, complications). Ceramic bone substitute materials provide an attractive alternative for lumbar interbody spinal fusion. The aim of the present study was to investigate the mechanical properties of various types of ceramic using a specific fusion method. Ten specimens each of 7 different types of ceramic were tested using a hydraulic testing machine with two different sample holders: polyurethane foam (mechanical properties similar to cancellous bone) and aluminium. The parameters axial compression and axial torque were investigated. With the polyurethane foam holders, none of the ceramic implants failed under compression, while under axial rotation, two types of ceramic failed. With the aluminium holders, 3 ceramics showed no failure up to 25 kN under compression, while under torsion all the ceramics failed. One type of ceramic showed specific fracture properties with a higher load-bearing capacity after failure in comparison with all the other types studied.

biomedizinische technik

Mechanische Untersuchung potentieller keramischer Implantatmaterialien zur minimal-invasiven anterioren lumbalen interkorporellen Fusion Mechanical Evaluation of Potential Ceramic lmplant Materials for Use in Minimally Invasive Anterior Interbody Fusion