title: Chrome nitride coating reduces wear of small, spherical CrCoMo metal-on-metal articulations in a joint simulator.
abstract: Metal-on-metal articulations have fallen out of favour in larger joint replacements, but are still used in smaller joints. Coating the articulation has been suggested as one way of reducing wear. We compared a standard 6 mm CrCoMo articulation designed for the carpometacarpal joint of the thumb with a chromium nitride-coated version after 512,000 cycles in a joint simulator. A total of 6 articulations in each group were tested with a unidirectional load of 5 kg in Ringer's solution. We found a statistically significant reduction in weight loss, amount of metallic wear produced and volumetric wear for the chromium nitride-coated articulation. Our findings support the use of chromium nitride coating in order to minimize the amount of metallic wear produced.
authors.affiliation: 1 Orthopaedic Department, University Hospital of Oslo, Oslo, Norway.
authors.forename: R
authors.initials: R
authors.lastname: Thorkildsen
authors.affiliation: 1 Orthopaedic Department, University Hospital of Oslo, Oslo, Norway.
authors.forename: O
authors.initials: O
authors.lastname: Reigstad
authors.affiliation: 1 Orthopaedic Department, University Hospital of Oslo, Oslo, Norway.|2 University of Oslo, Oslo, Norway.
authors.forename: M
authors.initials: M
authors.lastname: Røkkum
mesh_terms: D019643:Arthroplasty, Replacement / Q000295:instrumentation*; D052737:Carpometacarpal Joints; D002857:Chromium; D006801:Humans; D008422:Materials Testing; D061825:Metal-on-Metal Joint Prostheses; D008954:Models, Biological; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D014025:Titanium; D016474:Weight-Bearing
chemical_list: D002857:Chromium; D014025:Titanium
keywords: Thumb; arthroplasty; carpometacarpal arthritis; joint simulator; osteoarthritis; total joint replacement