Early failure mechanisms of constrained tripolar acetabular sockets used in revision total hip arthroplasty Article

Cooke, CC, Hozack, W, Lavernia, C et al. (2003). Early failure mechanisms of constrained tripolar acetabular sockets used in revision total hip arthroplasty . JOURNAL OF ARTHROPLASTY, 18(7), 827-833. 10.1016/S0883-5403(03)00325-5

cited authors

  • Cooke, CC; Hozack, W; Lavernia, C; Sharkey, P; Shastri, S; Rothman, RH

authors

abstract

  • 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. © 2003 Elsevier Inc. All rights reserved.

publication date

  • January 1, 2003

published in

Digital Object Identifier (DOI)

start page

  • 827

end page

  • 833

volume

  • 18

issue

  • 7