Artículos
Publicado el 3 de junio de 2001
Artroplastía de cadera.
Procedimiento experimental profiláctico del aflojamiento protésico.
La utilización de una membrana sintética en especímenes animales, tendría un efecto bloqueante sobre las partículas (debris) en su papel en el aflojamiento artroplástico.
Una membrana semipermeable de politetrafluoroetileno expandido, con aplicaciones actuales en cirugía máxilofacial y odontológica, se mostraría eficaz para prevenir el aflojamiento de los implantes de cadera en animales, al ser aplicada alrededor del casquete acetabular y del extremo proximal del tallo femoral. Los resultados del estudio controlado a doble ciego, mostraron que la membrana inicialmente actúa físicamente como un sello, bloqueando el paso del debris. Asimismo, luego de 12 meses, los investigadores comprobaron desarrollo óseo alrededor de la membrana. Esto significaría la creación de una barrera biológica más allá del sello primario, continuando y reforzando la prevención de la migración de las partículas a nivel de las respectivas interfases protésicas. Según el autor, la adhesión de las partículas a la membrana, frenaría su efecto osteolítico, responsable del ulterior aflojamiento protésico.
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