Vibrational techniques to assess the stability of spherical press-fitted implants : preliminary results

Vibration analysis, widely used in industry to assess the integrity of mechanical structures, has been successfully applied in biomechanics to determine bone mechanical properties, to monitor fracture healing, and to assess the stability of Branemark dental implants and femoral stems in vitro and in vivo. This paper presents vibrational techniques designed to assess the initial stability of spherical implants. Reverse shoulder prostheses, hip resurfacing femoral and acetabular implants were studied during an in vitro series of experiments. The study on shoulder prostheses focuses on metal-on-metal fixation whereas the studies on resurfacing implants focus on metal-on-bone fixation. The changes observed in the frequency response function graphs contain information related to the implant stability in different controlled conditions (free-free situation, various insertion stages, different fixations). The results obtained by vibration analysis and destructive mechanical tests were correlated.

ISBN:9789073802872

Jaar van publicatie:2010

BOF-keylabel:ja

IOF-keylabel:ja

Authors from:Hospital, Higher Education