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Inicio Revista Española de Cirugía Ortopédica y Traumatología Disociación del polietileno de una copa acetabular no cementada. Aportación de...
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Vol. 50. Issue 6.
Pages 431-436 (January 2006)
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Vol. 50. Issue 6.
Pages 431-436 (January 2006)
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Disociación del polietileno de una copa acetabular no cementada. Aportación de 11 casos
Polyethylene liner disassociation in a noncemented acetabular cup: 11 cases
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A. López-Sastre-Núñez
Corresponding author
ricardomencia@wanadoo.es

Correspondencia: Servicio de Cirugía Ortopédica y Traumatología. Hospital de León. C/ Maestro Nicolás, n.o 3, 7.o A. 24005 León.
, R. Mencía-Barrio, J.A. Alonso-Barrio, J.J. González-Fernández
Servicio de Cirugía Ortopédica y Traumatología. Hospital de León. León. España
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Article information
Objetivo

Se estudian los casos de disociación del núcleo de polietileno de la copa metálica no cementada Cerafit® (Ceraver-Osteal, Roisy, Francia).

Material y método

Once casos de disociación polietilenocopa metálica, de los cuales en cinco se reconoció un antecedente traumático y en los otros seis una clínica insidiosa.

Resultados

Cuando la clínica se presentó de forma aguda se apreció una luxación del núcleo del polietileno con rotura del mecanismo de anclaje. Mientras que los pacientes con clínica insidiosa presentaron diferentes grados de usura del polietileno y abrasión de la copa metálica con metalosis. En todos los casos se recambiaron el cótilo y el vástago femoral.

Conclusión

La disociación del núcleo de polietileno de la copa metálica es una complicación de la artroplastia total de cadera relativamente rara. Si no se reconoce a tiempo, las consecuencias pueden ser catastróficas.

Palabras clave:
disociación
polietileno
prótesis de cadera
Aim

To study cases in which there has been disassociation of the polyethylene insert from the Cerafit® (Ceraver-Osteal, Roisy, France) non-cemented metallic acetabular shell.

Materials and methods

Eleven cases were seen of disassociation of the polyethylene liner from the metallic acetabular shell. In five cases there was trauma and the other six had an insidious clinical evolution.

Results

In the cases with acute onset there was dislocation of the polyethylene liner and rupture of the fixation mechanism. In the cases with an insidious clinical evolution, there were different degrees of wear of the polyethylene with abrasion of the metallic acetabular shell and metallosis. All cases underwent revision with replacement of the acetabular cup and the femoral stem.

Conclusion

Disassociation of the polyethylene liner from the metallic acetabular shell is a relatively rare complication in total hip replacement. But if it is not recognized in time the consequences can be catastrophic.

Key words:
disossociation
polyethylene
hip replacement
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Copyright © 2006. Sociedad Española de Cirugia Ortopédica y Traumatología (SECOT)
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