Erschienen in:
18.05.2016 | CORR Insights
CORR Insights®: Modular to Monoblock: Difficulties of Detaching the M2a-Magnum™ Head Are Common in Metal-on-metal Revisions
verfasst von:
Rodrigo M. Mardones, MD
Erschienen in:
Clinical Orthopaedics and Related Research®
|
Ausgabe 9/2016
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Excerpt
Corrosion following THA was once considered a small problem, consisting of only 1% to 2% of all THA complications [
5]. However, corrosion is commonly found on metal-on-metal (MoM) large femoral heads, modular prostheses, and revision MoM implants [
1,
4]. During revision, the prosthesis head must be detached from the stem. Some MoM implants, however, have a titanium interface as a head adapter. Both types of heads are susceptible to jamming due to corrosion, cold welding, and fretting. Jamming can potentially increase the already existing high-level of adverse reaction to MoM debris, leading up to 49% failure at 6 years on some MoM implants [
4]. …