Experimental and Numerical Study of Cemented Bone--implant Interface Behaviour using Microtomography Measurement

0359996 - ÚTAM 2012 CZ eng D - Dizertace
Kytýř, Daniel
Experimental and Numerical Study of Cemented Bone--implant Interface Behaviour using Microtomography Measurement.
CTU - Faculty of Transportation Sciences, Department of Mechanics and Materials. Obhájeno: CTU - Faculty of Transportation Sciences. 20.5.2011. - Praha: CTU FTS, 2011. 99 s.
Grant CEP: GA ČR(CZ) GAP105/10/2305
Výzkumný záměr: CEZ:AV0Z20710524
Klíčová slova: micro-CT * implant degradation * pelvis
Kód oboru RIV: FI - Traumatologie, ortopedie

The aim of the research was to investigate the cemented bone-implant interface behavior (cement layer degradation and bone-cement interface debonding) with emphasis on the imaging techniques suitable to detect early defects in the cement layer. To simulate in vivo conditions a polyethylene acetabular cup was implanted into the human pelvic bone using commercial polymethacrylate bone cement. The implanted cup was then loaded in a custom hip simulator to initiate fatigue crack propagation in the bone cement. The pelvic bone was then scanned repetitively in a micro-tomography device. The reconstructed tomography images showed failure processes that occurred in the cement layer during the first 250,000 cycles. A failure in cemented acetabular implant -- debonding, crumbling and smeared cracks -- was found at the bone--cement interface.
Trvalý link: http://hdl.handle.net/11104/0197656