http://www.ingentaconnect.com/content/tandf/sort/2004/00000075/00000002/art00004?crawler=true
Total hip replacement in younger patients
Source: Acta Orthopaedica Scandinavica, Volume 75, Number 2, April 2004 , pp. 142-146(5)
Publisher: Taylor and Francis Ltd
Abstract:
Background A high risk of loosening has been
reported in replacements performed because of avascular
necrosis.
Patients and methods To study cementless total
hip replacement (THR) in younger patients with avascular
necrosis (AVN), we analyzed retrospectively the outcome
in 129 cases: 46 Mittelmeier monobloc ceramic hips (22
cases with AVN), and 83 Zweymüller total hip systems (35
cases with AVN) clinically and radiographically.
Results At follow-up, 17 Mittelmeier prostheses
(10 AVN) and 4 Zweymüller prostheses (none with AVN) had
been revised. The diagnosis did not affect the implant
survival, but the Zweymüller THR fared better than the
Mittelmeier system. The main reason for revision of
Mittelmeier implants was aseptic loosening, 3 of 4
Zweymüller revisions were necessary due to polyethylene
wear. This difference was confirmed by the radiographic
evaluation of the still intact implants: Zweymüller THR
showed better values for signs of osseointegration,
radiolucent lines around the implants and migration, but
more acetabular wear. None of these differences was
affected by the AVN diagnosis.
Interpretation We could not confirm that AVN is a
risk factor in total hip replacement.
Document Type: Research article
DOI: 10.1080/00016470412331294385
