Efecto de atenuación de sonidos audibles del cemento en artroplastía de cadera cerámica-cerámica. Estudio in-vitro

J. F. BURGO; A. OZOLS; C. FERNANDEZ; D. MENGELLE; J. A.ALIAGA ; E. ÁLVAREZ SALINAS; C.M. AUTORINO

Ciudad Autónoma de Buenos Aires

Congreso; 49no Congreso Argentino de Ortopedia y Traumatología; 2012

Sociedad Argentina de Ortopedia Y traumatología

Squeaking of ceramic on ceramic bearing surfaces of cementless hip implants affects a part of implanted patients. There are several factors in the production the audible sound associate to sliding and rolling of ceramic surfaces at certain frequencies and the sound conduction trough metal stem. However, there is not a practical solution of this problem, which frequently leads to revision surgery. At this respect, a possible solution is proposed, based on the clinical experience with cemented ceramic on ceramic hip implants, where it is not registered any squeaking. The risked hypothesis is the sound damping effect of cement mantle. The initial demonstration of this is performed by means of in vitro tests performed in a simple setup, where the stem sound conduction is compared between non-cemented and cemented stems. The results show the sound amplitude reduction and certain frequencies absorption. This kind of elemental assessment could be fairly adopted in hospital orthopaedic departments, in order to qualify the specific hip implants, avoiding future revision surgeries.