High Re-Operation Rates Using Conserve Metal-On-Metal Total Hip Articulations.
BACKGROUND
Metal-on-metal hip articulations have been intensely debated after reports of adverse reactions and high failure rates. The aim of this study was to retrospectively evaluate the implant of a metal-on.metal total hip articulation (MOM THA) from a single manufacture in a two-center study.


METHODS
108 CONSERVE(®) MOM THA were implanted in 92 patients between November 2005 and December 2010. Patients had at time of retrospective evaluation their journals reviewed for re-operations and adverse reactions.


RESULTS
20 hips were re-operated (18.4%) at a mean follow up of 53 months. 4 pseudotumors were diagnosed at time of follow up but no substantiated link was made between adverse reactions and re-operations.


CONCLUSIONS
The high re-operation rates found in this study raised concern about the usage of the MOM THA and subsequently lead to the termination of implantation of this MOM THA at the two orthopaedic departments.
Department of Orthopaedic Surgery, The Regional Hospital Viborg, Denmark.
S L
SL
Mogensen
Department of Orthopaedic Surgery, The Regional Hospital Viborg, Denmark.
T
T
Jakobsen
Department of Orthopaedic Surgery, The Regional Hospital Thy, Denmark.
H
H
Christoffersen
Department of Orthopaedic Surgery, The Regional Hospital Viborg, Denmark.
N
N
Krarup
Adverse reactions; arthroplasty; aseptic loosening; hip revision; metal-on-metal hip; pseudotumor; total hip