Elevated Cobalt, Chromium and Molybdenum Levels in Peripheral Blood Have No Effect on the Development of Heterotopic Ossifications after Metal-on-Metal Total Hip Arthroplasty

Alexander J. Pfister, Karl-Heinz Widmer, Niklaus F. Friederich, Martin Majewski
2016 Journal of Biomedical Science and Engineering  
Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybdenum on the development of HO. Native blood samples from patients with 86 high-carbon and 16 low-carbon Co 28 Cr 6 Mo articulations were analysed by highresolution inductively coupled plasma mass-spectrometry (HR ICP-MS). The results revealed that high-carbon metal-on-metal
more » ... l-on-metal articulations showed lower metal blood levels (Co 1.03 to 1.60 µg/l, Cr 0.77 to 0.88 µg/l, Mo 0.45 to 0.56 µg/l) whereas low-carbon articulations achieved higher metal blood levels (Co 2.59 to 6.85 µg/l, Cr 1.25 to 3.55 µg/l, Mo 0.45 to 0.64 µg/l), but no correlation between metal ion blood level or carbon content and the development of HO could be found in these MoM articulations. Hence, metal debris from MoM articulation does not stimulate heterotopic bone formation despite other well-known local reactions. A. J. Pfister et al. 26
doi:10.4236/jbise.2016.91004 fatcat:chftmxdnnvezlcmw5whwicv6pi