It is well known that hip pain and other symptoms are greatly improved once a patient undergoes revision surgery to remove metal-on-metal hip implants like the Stryker Rejuvenate or ABGII hip implant. However, no one has ever has ever examined how quickly elevated cobalt and chromium levels go down after revision. The Rejuvenate and ABGII […]
There has been a lot of literature recently concerning hip implant failures due to fretting and corrosion at the neck/stem interface. What does this mean for the patient? It means pain, swelling, instability and limited mobility. Kent et al conducted study of the K2/Apex uncemented femoral stem, a hip implant composed of cobalt-chromium and titanium, […]
Are you suffering after your hip implant revision surgery? A high percentage of patients implanted with monoblock metal-on-metal (MoM) total hip implants like the DePuy ASR suffer from early complications after revision surgery. Louis Stryker, M.D. and his colleagues understand that the reasons metal-on-metal hip implants fail are quite unique compared to conventional hip replacements. […]
Ever wonder how surgeons choose the right hip implant to use during surgery? There is a huge range of possible prosthesis combinations available for orthopedic surgeons to choose when they perform total hip arthroplasties. In 2000, the National Institute for Health and Care Excellence (NICE) established a 10 year revision rate benchmark of 10% for […]
Despite the advantages of an additional level of modularity at the femoral neck there continues to be reports of clinical concerns of corrosion, metallosis and fracture of the modular neck in dual modular devices. The Stryker Rejuvenate, a dual modular hip implant, was voluntarily recalled in 2012 because of high revision rates. The authors of […]
Muscle atrophy is a well-known complication from metal-on-metal hip implants. A recent article discussed changes in soft tissue seen on MRIs over time with patients implanted with metal-on-metal modular stemmed prostheses and hip resurfacings. The median implantation time was 7 years. The authors described the muscle atrophy and pseudotumor formation that develops as part of […]
Ultrasound and MRI are the primary imaging techniques used to detect pseudotumors and other soft tissue pathology in patients with metal-on-metal THAs. Soft tissue lesions can be difficult to detect because patients can have symptoms, such as pain and discomfort and elevated cobalt and chromium levels, or no symptoms at all. There have been several […]
Dr. Sutphen and colleagues from Columbus, OH conducted a retrospective study with patients who had been implanted with the metal-on-metal Zimmer Durom hip implant. They were trying to quantify the prevalence of pseudotumors in patients who underwent metal-on-metal total hip arthroplasties. The study included only patients who required a total hip replacement due to osteoarthritis […]
The authors of this article investigated Rejuvenate hip implant failures in order to identify patients who are at particularly high risk for developing adverse tissue reactions (ALTR). They also wanted to determine how accurate MRI and metal ion levels are in detecting ALTR. The results confirmed that females and small Rejuvenate stem sizes were at […]
An article by Dr. Johannes Cip and his colleagues recounts the reintroduction of Metal on Metal orthopedic devices and the injuries resulting from the byproducts of their wear and corrosion. Although the authors found a consistent decrease in Blood Cobalt and Chromium following removal of the devices, they also noted increased rates of complications following […]
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