TY - JOUR
T1 - Early failure mechanisms of constrained tripolar acetabular sockets used in revision total hip arthroplasty
AU - Cooke, Christopher C.
AU - Hozack, William
AU - Lavernia, Carlos
AU - Sharkey, Peter
AU - Shastri, Shani
AU - Rothman, Richard H.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2003/10
Y1 - 2003/10
N2 - Fifty-eight patients received an Osteonics constrained acetabular implant for recurrent instability (46), girdlestone reimplant (8), correction of leg lengthening (3), and periprosthetic fracture (1). The constrained liner was inserted into a cementless shell (49), cemented into a pre-existing cementless shell (6), cemented into a cage (2), and cemented directly into the acetabular bone (1). Eight patients (13.8%) required reoperation for failure of the constrained implant. Type I failure (bone-prosthesis interface) occurred in 3 cases. Two cementless shells became loose, and in 1 patient, the constrained liner was cemented into an acetabular cage, which then failed by pivoting laterally about the superior fixation screws. Type II failure (liner locking mechanism) occurred in 2 cases. Type III failure (femoral head locking mechanism) occurred in 3 patients. Seven of the 8 failures occurred in patients with recurrent instability. Constrained liners are an effective method for treatment during revision total hip arthroplasty but should be used in select cases only.
AB - Fifty-eight patients received an Osteonics constrained acetabular implant for recurrent instability (46), girdlestone reimplant (8), correction of leg lengthening (3), and periprosthetic fracture (1). The constrained liner was inserted into a cementless shell (49), cemented into a pre-existing cementless shell (6), cemented into a cage (2), and cemented directly into the acetabular bone (1). Eight patients (13.8%) required reoperation for failure of the constrained implant. Type I failure (bone-prosthesis interface) occurred in 3 cases. Two cementless shells became loose, and in 1 patient, the constrained liner was cemented into an acetabular cage, which then failed by pivoting laterally about the superior fixation screws. Type II failure (liner locking mechanism) occurred in 2 cases. Type III failure (femoral head locking mechanism) occurred in 3 patients. Seven of the 8 failures occurred in patients with recurrent instability. Constrained liners are an effective method for treatment during revision total hip arthroplasty but should be used in select cases only.
KW - Complications
KW - Constrained sockets
KW - Dislocation
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U2 - 10.1016/S0883-5403(03)00325-5
DO - 10.1016/S0883-5403(03)00325-5
M3 - Article
C2 - 14566735
AN - SCOPUS:0141924459
SN - 0883-5403
VL - 18
SP - 827
EP - 833
JO - Journal of Arthroplasty
JF - Journal of Arthroplasty
IS - 7
ER -