High Re-Operation Rates Using Conserve Metal-On-Metal Total Hip Articulations

S.L. Mogensen*, T. Jakobsen1, H. Christoffersen2, N. Krarup1
1 Department of Orthopaedic Surgery, The Regional Hospital Viborg, Denmark
2 Department of Orthopaedic Surgery, The Regional Hospital Thy, Denmark

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© Mogensen et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address corresspondence to this author at the Simon Limbrecht Mogensen Department of Orthopaedic Surgery, The Regional Hospital Viborg, Heibergs Allé, Postbox 130, DK-8800 Viborg, Denmark; Tel: +45 20762520; Fax: +45 78446505; E-mail:



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.

Materials and 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.


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.


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.

Keywords: Adverse reactions, arthroplasty, aseptic loosening, hip revision, metal-on-metal hip, pseudotumor, total hip.