30-179
Cotilos impactados vs. roscados no cementados.
Screwed vs. Press-fit impacted sockets
M. COTS PONS, J. CASAS SABATER, M. GARCIA-ELIAS COS, J. RODRIGUEZ MIRALLES,P. ROSSIGNANI DE STEFANI, J. OROVIO DE ELIZAGA y A. J. CASANOVAS RUIZ-FORNELLS Servicio de Cirugía Ortopédica y Traumatología. Hospital General de Cataluña.
Recepción:
06/11/2008
Aceptación:
06/11/2008
Publicación:
06/11/2008
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Resumen (ES)
Post-operative anteroposterior radiographs of the pelvis in 102 patients receiving
a cementless total hip arthroplasty were analyzed. In a group, a screwed spherical socket
(SCR) was applied, while in other a press-fit impacted socket (IMP) was used. The following parameters
were studied: inclination angle, location and centering of the acetabular component,
degree of protrusion-extrusion, and porcentage of contact surface between the socket and the
acetabulum. SCR sockets appeared to be placed more vertically (p=0.006), and laterally
(p=0.02) than IMP prostheses. The percent of properly centered sockets was higher among
IMP than among SCR implants (p=0.002). SCR prostheses were found to be partly extruded in
19% of cases while none of the IMP prostheses had this problem. In conclussion, despite the
theoretical advantage of the SCR implants having a better initial fixation than the IMP implants,
the latter tend to be implanted in a more optimal position, thus ensuring a better longterm
stability and therefore less wear problems can be expected.
a cementless total hip arthroplasty were analyzed. In a group, a screwed spherical socket
(SCR) was applied, while in other a press-fit impacted socket (IMP) was used. The following parameters
were studied: inclination angle, location and centering of the acetabular component,
degree of protrusion-extrusion, and porcentage of contact surface between the socket and the
acetabulum. SCR sockets appeared to be placed more vertically (p=0.006), and laterally
(p=0.02) than IMP prostheses. The percent of properly centered sockets was higher among
IMP than among SCR implants (p=0.002). SCR prostheses were found to be partly extruded in
19% of cases while none of the IMP prostheses had this problem. In conclussion, despite the
theoretical advantage of the SCR implants having a better initial fixation than the IMP implants,
the latter tend to be implanted in a more optimal position, thus ensuring a better longterm
stability and therefore less wear problems can be expected.
Palabras clave (ES):
Impactado
Roscado
No
cementado
Cotilo
Acetábulo
Fijación
Artroplastia
Prótesis
Cadera
Resumen (EN)
Post-operative anteroposterior radiographs of the pelvis in 102 patients receiving
a cementless total hip arthroplasty were analyzed. In a group, a screwed spherical socket
(SCR) was applied, while in other a press-fit impacted socket (IMP) was used. The following parameters
were studied: inclination angle, location and centering of the acetabular component,
degree of protrusion-extrusion, and porcentage of contact surface between the socket and the
acetabulum. SCR sockets appeared to be placed more vertically (p=0.006), and laterally
(p=0.02) than IMP prostheses. The percent of properly centered sockets was higher among
IMP than among SCR implants (p=0.002). SCR prostheses were found to be partly extruded in
19% of cases while none of the IMP prostheses had this problem. In conclussion, despite the
theoretical advantage of the SCR implants having a better initial fixation than the IMP implants,
the latter tend to be implanted in a more optimal position, thus ensuring a better longterm
stability and therefore less wear problems can be expected.
a cementless total hip arthroplasty were analyzed. In a group, a screwed spherical socket
(SCR) was applied, while in other a press-fit impacted socket (IMP) was used. The following parameters
were studied: inclination angle, location and centering of the acetabular component,
degree of protrusion-extrusion, and porcentage of contact surface between the socket and the
acetabulum. SCR sockets appeared to be placed more vertically (p=0.006), and laterally
(p=0.02) than IMP prostheses. The percent of properly centered sockets was higher among
IMP than among SCR implants (p=0.002). SCR prostheses were found to be partly extruded in
19% of cases while none of the IMP prostheses had this problem. In conclussion, despite the
theoretical advantage of the SCR implants having a better initial fixation than the IMP implants,
the latter tend to be implanted in a more optimal position, thus ensuring a better longterm
stability and therefore less wear problems can be expected.
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