Although the safety concerns for patients who have MoM hip implants are present throughout the world, there are differences both in device usage and device design of MoM hip implants in the United States and those outside the United States. Much of the available data regarding hip implants, including Metal-on-Metal (MoM) implants, involve registry data from countries outside the United States. Metal on Metal Hip Implants Outside of the United States Information for patients and health care providers about metal-on-metal hip implants is provided in this websection. Patients with a progressing ALTR may be considered for earlier revision to prevent extensive damage to bone, muscle and nerves. This local response is sometimes referred to as an "adverse local tissue reaction (ALTR)" the systemic and local responses are referred to as "adverse reaction to metal debris (ARMD)." Soft tissue damage may lead to pain, implant loosening, device failure, and the need for revision surgery (the old device is removed and replaced with another one). Over time, the metal particles around some implants can cause damage to bone and/or tissue surrounding the implant and joint. At this time, it is not possible to predict who will experience a reaction, what type of reaction they might have, when the reaction will occur, or how severe the reaction will be. However, there is no way to fully avoid the production of metal ions and some metal particles.ĭifferent people will react to these metal ions and particles in different ways. Orthopaedic surgeons take several precautions before and during hip replacement surgery to try to optimize the way in which the ball and socket rub against each other so that fewer wear particles are produced. cobalt and chromium) from the metal implant or from the metal particles will enter the bloodstream. Wear and corrosion at the connection between the metal ball and taper of the stem may also occur. The sliding metal surfaces will cause some tiny metal particles to wear off of the device into the space around the implant. Metal can also be released from other parts of the implant where two implant components connect. In MoM hip implants, the metal ball and the metal cup slide against each other during walking or running which can cause the release of metal particles. Metal-on-metal (MoM) hip implants have unique risks in addition to the general risks of all hip implants. All artificial hip implants carry risks including wear of the component material.
0 kommentar(er)
