MoM hip implants that have been found to require early replacement are mainly those implants used in conventional total hip replacements with a larger size of femoral head, and implants with small femoral heads used in the resurfacing hip replacement procedure. the femoral head is only "capped" or "resurfaced"). MoM hip implants are used in some total conventional hip replacements, in which the femoral head is totally replaced by the implant, and in almost all total resurfacing hip replacements, in which a metal cap is placed over the femoral head (i.e.The data from the NJRR show that there are MoM implants that perform just as well as other types of hip implants. The relative performance of all hip implants has been actively monitored by the TGA since the inception of the Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR) in 1999.Metal-on-metal (MoM) hip implants (in which the articulating surfaces of the implant are made from metal) have been used for many years in Australia but their use is declining.In this section: Key points | Background | What is a metal-on-metal hip replacement implant | What are the concerns with metal-on-metal implants | What is the TGA doing about metal-on-metal implants? | Recommendations for follow-up of patients | References Key points Information for general practitioners, orthopaedic surgeons and other health professionals On each of these occasions, the advice received from expert orthopaedic advisory groups was that the existing TGA statement effectively conveyed all the information and advice contained in these other communications, but was better suited to the Australian context. The TGA had previously reviewed its advice in the context of information published by the European Commission's Scientific Committee on Emerging Newly Identified Health Risks on 24-25 September 2014 and the French health regulator Agence Nationale de sécurité du Médicament et des produits de santé (ANSM) on 17 December 2014. The TGA review of that advice, which included referral to an external group of experts, found that the recommendations regarding the care of patients with MoM implants previously published below remained appropriate and no change or further information was required at this time. On 29 June 2017, the UK Medicines and Healthcare Products Regulatory Agency’s (MHRA) published updated advice regarding metal-on-metal (MoM) hip replacement implants. On this page: Update, 14 July 2017 | Metal-on-metal hip replacement implants, 20 September 2012 Update
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