Metal Poisoning Resulting from Metal Hip Implants on the Rise, Media Reports

The ban against metal-on-metal hip replacement implants has been extensively demanded by many medical experts, based on the reports by The Guardian. According to the report, there has been primary proof linking MoM hip implants to high failure rates, especially in women.

Recently, there are a considerable number of studies which are conducted to investigate the safety of some types of MoM hip implants, believing that these types of implants may break down faster than implants fashioned from plastic and ceramic parts.

There is a very unique aspect to metal-on-metal hip implants that has been found unsafe to hip implant patients. In the light of recent hip implant recalls, surgeons have come forward to expose high failure rates in many large diaphragm metal-on-metal implants, and the significant damage they cause by way of metal wear debris.

It has been discovered that metal debris causes damage on soft tissues and in and around the hip joint. Various studies have found that it may effect on directly killing the tissues and stimulating an inflammatory process. The tissues surrounding the metal hip have been observed to develop pseudo-tumors in most recipients of large metal-on-metal hip implants.

Benign tumors, which are by-product of pus and scar tissues, are the result when the body is unable to identify the foreign object implanted in the body. The body’s reaction to exposure to metals is known as metallosis.

The inflammatory method affects the body’s immune response by infiltrating the T-lymphocytes, or T-cells, that boost the body’s hypersensitivity response. The magnitude of health apprehensions heightened during this time about cobalt and chromium implants. Cobalt has been known to cause cardiomyopathy, hypothyroidism, and both cobalt and chromium may possibly contribute to neurotoxic outcomes, as well as carcinogenesis, or cancer.

On July 2012, the Rejuvenate and ABG II modular systems have been freely retracted by Stryker.As was stated by Stryker Orthopaedics, there is a possibility of fretting and corrosion where some fragments of these modular Stryker hip alternates meet.

When Stryker Orthopaedics sent out its initial communications on this issue, it specified that revision surgery rates were less than one percent. The data was used by May 28, 2012, however, it is not used already. Rather, Stryker labels the complication rate as particularly low. Although this is intended to sound reassuring, it also tells us they are likely uncertain about the actual failure rate.

Determining whether to have a hip replacement procedure? Better weigh the risks and benefits of it first, to save yourself from further injury.

Source:
nytimes.com/2010/03/04/health/04metalhip.html?pagewanted=all&_r=0
health.usnews.com/health-news/news/articles/2012/06/27/fda-probing-safety-of-metal-on-metal-hip-implants
orthoinfo.aaos.org/topic.cfm?topic=A00625
  1. 2012/12/28(金) 05:30:20|
  2. Diseases and Conditions
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