Article Link: https://www.icij.org/investigations/implant-files/patient-hopes-rise-and-fall-as-an-industry-balances-progress-and-profit/ Article Title: Patient Hopes Rise and Fall as An Industry Balances Progress and Profit By Dean Starkman and Delphine Reuter The article starts with a description of a 2008 sales meeting for DePuy Orthopaedics, Inc., a subsidiary of Johnson & Johnson. The sales gathering was more of a party than a meeting: […]

Title: Explant Analysis of the Biomet Magnum/ReCap metal-on-metal hip joint Abstract Metal-on-Metal (MoM) hip resurfacing implants and MoM total hip arthroplasty (THA) implants have recently been questioned by the medical community because of their high revision rates. Understanding the reasons for failure can provide insight into how implants can be improved. Furthermore, looking at the […]

Title: Modular to Monoblock: Difficulties of Detaching the M2a-Magnum Head Are Common in Metal on Metal Revisions Where Are We Now? Metal-on-Metal total hip arthroplasty (MoM THA) implants consist of many metal parts that rub together over the course of normal use. The medical community used to think that corrosion — which is essentially rusting […]

Title: Clinical and Wear Analyses of 9 Large Metal-on-Metal Total Hip Prostheses Abstract All patients in this study had the Biomet Magnum (M2a-Magnum™) hip implant with a Recap cup and Taperloc (Taperloc1 Hip Stem) or Mallory stem. This study attempts to figure out the underlying reasons for implant failure by looking at the wear analyses […]

Title: The Effect of Different Bearing Surfaces on Metal Ion Levels in Urine Following 28mm Metal-on-Metal and 28mm Metal-on-Polyethylene Total Hip Arthroplasty Abstract Total hip arthroplasty (THA), or hip replacement surgery, is known to increase levels of metal ions in the body. This is because the implant devices can shed metal particles into the body. […]

Title: “Neuropsychiatric symptoms following metal-on-metal implant failure with cobalt and chromium toxicity” Abstract Many metal-on-metal (MoM) total hip replacement implants have been recalled due to high failure rates. This study assesses the mental health of 10 patients who underwent revision surgery for failed MoM implants. The authors believe this is the first study to find […]

Research Title: Pseudotumor in Large-Diameter Metal-on-Metal Total Hip Articulation Abstract This case study focuses on a patient who experienced pain in her hip following a large-diameter metal-on-metal (MoM) hip replacement. She also developed a pseudotumor, which is an abnormal swelling of tissue that resembles a tumor. Intro MoM hip implants are thought to be more […]

Title: Cobalt-Chromium Metallosis With Normal Electroretinogram Background: The popularity of Metal-on-Metal (MoM) hip implants, which are typically made out of cobalt and chromium, has made cobalt poisoning of the eye more common. This condition is called ocular cobalt toxicity. This study focuses on a 66-year-old-man whose vision was damaged because he got cobalt poisoning from […]

Title: Unusual Case of Congestive Heart Failure:  Cardiac Magnetic Resonance Imaging and Histopathologic Findings in Cobalt Cardiomyopathy Summary A 69-year-old woman came to the authors with symptoms of congestive heart failure, a heart condition that leads to buildups of fluid in the lungs. She had a history of hypertension, mild kidney problems, and hip replacements […]

Title: Hip ­Implant Related Chorio-­Retinal Cobalt Toxicity Abstract A 39-year-old female with high levels of cobalt in her blood (a side-effect of her two hip implants) came to the doctors with complaints that her left eye had been blurry for three weeks. Eye imaging revealed that the light-sensitive portion of the patient’s retina (called the […]

Research Title: Adverse Local Tissue Reaction After a Metal-on-Metal Total Hip Prosthesis Without Elevated Serum Metal Ion Levels Background Recent studies show a correlation between high cobalt and chromium levels and failed metal on metal hip (MoM)  implants. Typically a MoM hip patient with cobalt blood levels above 7 parts per billion (ppb) requires follow-up […]

Abstract: Peri-articular soft-tissue masses or ‘pseudotumors’ can occur after large-diameter metal-on-metal (MoM) resurfacing of the hip and conventional total hip replacement (THR). Our aim was to assess the incidence of pseudotumor formation and to identify risk factors for their formation in a prospective cohort study. A total of 119 patients who underwent 120 MoM THRs […]