The Relationship Between Cobalt/Chromium Ratios and the High Prevalence of Head-Stem Junction Corrosion in Metal-on-Metal Total Hip Arthroplasty

The Journal of Arthroplasty
Harry S HothiAlister J Hart

Abstract

The size of the clinical impact of corrosion of the taper junction of metal-on-metal total hip arthroplasties (MOM-THAs) is unclear. Examination of a large number of retrieved MOM resurfacings and total hip arthroplasties can help us understand the role of taper corrosion in metal ion release. We graded the severity of corrosion at the taper junction of 395 MOM-THAs and compared the prerevision whole blood metal ion levels of these hips with 529 failed MOM hip resurfacings. Virtually all MOM-THA hips (n = 388) had evidence of corrosion of the head-stem taper junction and graded as severe in 31% (n = 124). The median cobalt/chromium (Co/Cr) ratio was 1.58 (0.01-13.82) and 1.08 (0-4.86) for MOM-THA and MOM hip resurfacing, respectively; this difference was significant (P < .001). THA hips with severely corroded tapers had the highest median Co/Cr ratio of 1.86 (0.01-10). This study demonstrates the high prevalence of severe taper corrosion, which may be related to an elevated Co/Cr ratio before revision.

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Citations

Oct 3, 2018·The Journal of Bone and Joint Surgery. American Volume·Anna Di LauraAlister J Hart
Sep 9, 2018·International Orthopaedics·Giovanni BenelliFrancesco Sasso
Nov 21, 2019·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Vincent P GaleaHenrik Malchau
Sep 18, 2020·Zeitschrift für Orthopädie und Unfallchirurgie·Anastasia Rakow, Janosch Schoon
Feb 9, 2017·HSS Journal : the Musculoskeletal Journal of Hospital for Special Surgery·Michael MorlockNicholas Bishop
May 10, 2017·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Michel J Le DuffHarlan C Amstutz
Dec 21, 2017·Archives of Orthopaedic and Trauma Surgery·Maximilian F KasparekFriedrich Boettner
Mar 11, 2020·Advanced Science·Shanoob BalachandranMichael Herbig
Jul 1, 2020·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Alina M CrainicRichard B Cook
Dec 13, 2016·International Orthopaedics·Anna Di LauraAlister Hart
Oct 14, 2017·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Christian M WightEmil H Schemitsch
Oct 1, 2019·The Journal of Bone and Joint Surgery. American Volume·Mengnai Li, Andrew Glassman
Oct 1, 2020·The Bone & Joint Journal·Harlan C Amstutz, Michel Le Duff
Dec 17, 2020·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Kevin C IloAlister J Hart
Feb 1, 2020·Journal of Clinical Orthopaedics and Trauma·Justin S Chang, Fares S Haddad
Dec 15, 2020·Orthopaedics & Traumatology, Surgery & Research : OTSR·Jean-Etienne BeauchampEtienne L Belzile
Dec 15, 2020·EFORT Open Reviews·Michael M MorlockCarsten Perka

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